According to this theory, the Sun lies at the center of the solar system and the Earth's rotation around its own axis is what causes the days and nights to alternate. Thus, option C is correct.
What is the rotation of the Earth on its axis cause?Day and darkness are created by the Earth's axis rotating. Only half of the Earth faces the sun at any given time due to rotation. Daylight is present on the side facing the sun, while darkness is present on the side facing the sun (night).
To share his theory of the cosmos with his pals, Copernicus wrote a book by hand. In it, he put out the theory that the sun rather than Earth was the centre of the universe.
Therefore, Copernicus said that the rotation of the Earth on its axis caused the eclipses of the Moon.
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what is the accleration of free fall on a planet with four times the mass of the earth, but eight times the volume?
39.2 ms² is the acceleration of free fall on a planet with four times the mass of the earth, but eight times the volume.
Gravitational Acceleration: When a very big object, such as a planet, exerts a gravitational pull on a much smaller item, the planet's gravity causes the smaller object to fall downhill at a specific pace. Its pace is independent of the object's mass (provided that the object is significantly less massive than the planet).
The mass rises linearly while the radius shrinks exponentially, yielding
A = 4 × g
= 4 × 9.8 ms²
= 39.2 ms².
Gravity's acceleration is exclusively determined by the planet's mass and radius (distance from the center of the planet to its surface). The following equation may be used to calculate the acceleration due to gravity (g) given the planet's mass and radius (M and R).
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a 0.10 m long solenoid contains 500 turns and carries a current of 4.0 a. what is the strength of the magnetic field at the center of the solenoid if its radius is 1.0 x 10-2 m?
The strength of the magnetic field at the center of the solenoid is 1.26 x 10^-2 T.
What is a magnetic field?An area of space known as a magnetic field is where a magnetic force is applied to a magnetic item. It is produced by electric charges moving, such as electrons moving in an electric current or electrons moving in the atoms and molecules of magnetic materials.
A magnetic field has both a magnitude and a direction because it is a vector field. While the direction of the magnetic field is determined by the direction of the magnetic force it exerts on a north magnetic pole, the strength of the magnetic field is measured in units of tesla (T).
To calculate the magnetic field at the center of the solenoid:
B = μ₀ * n * I
Where:
μ₀ is the permeability of free space (4π x 10^-7 T·m/A)
n is the number of turns per unit length (in this case, n = N/L, where N is the total number of turns and L is the length of the solenoid)
I is the current
We can calculate n as:
n = N/L = 500 turns / 0.10 m = 5000 turns/m
Now we can substitute the values into the equation:
B = μ₀ * n * I = (4π x 10^-7 T·m/A) * (5000 turns/m) * (4.0 A)
B = 1.26 x 10^-2 T
Therefore, the strength of the magnetic field at the center of the solenoid is 1.26 x 10^-2 T (tesla).
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Listen
Which concept is present in all three of Newton's laws of motion?
O displacement
O acceleration
O force
mass
Answer: I think D. Mass!
Explanation: I hope this helps and I hope everyone has a good day/Friday&weekend^^
two oppositely-charged plates are set up in the lab, where the positive plate is placed north of the other plate. in which direction would the electric field lines between the plates be pointing of a diagram was drawn?
Answer:
Explanation:
in your new job at an engineering company, your supervisor asks you to fabricate a resistor that has a resistance of and no change in resistance with temperature. she suggests making the resistor from lengths of cylindrical carbon and nichrome wires of equal radius, placed end-to-end. she wants the combination to fit into a machine that allows for a radius of the resistor to be . what are the lengths of the two segments of the resistor?
To fabricate the resistor with the desired resistance, the length of the carbon wire is L carbon = L, and the length of the nichrome wire is L nichrome = 22 L.
To fabricate the resistor with the desired resistance and no change in resistance with temperature, we can use the formulas for the resistance of cylindrical carbon and nichrome wires. The resistance of a wire is given by:
R = ρ * L / A
here,
R is resistance,
ρ is resistivity,
L is length of the wire,
A is cross-sectional area.
The resistivity of carbon is about 0.05 ohm-meter and the resistivity of nichrome is about 1.10 ohm-meter. The resistance of a length of wire with resistivity ρ, length L, and cross-sectional area A can be calculated using:-
R = ρ * L / A
Let's assume the total resistance of the resistor is R. Then, the resistance of the carbon wire is R / 2 and the resistance of the nichrome wire is R / 2.
=> R carbon = ρ carbon * L carbon / A = 0.05 * L carbon / (π * r²)
=> R nichrome = ρ nichrome * L nichrome / A = 1.10 * L nichrome / (π * r²)
Equating R carbon and R / 2, and R nichrome and R / 2, we get:
0.05 * L carbon / (π * r²) = R / 2
1.10 * L nichrome / (π * r²) = R / 2
Dividing both equations by (π * r²):-
0.05 * L carbon = R / 2 * (π * r²)
1.10 * L nichrome = R / 2 * (π * r²)
Dividing IInd equ. by Ist equ.:-
L nichrome / L carbon = 22
Since the lengths of the two segments must be equal, we can set
L carbon = L nichrome = L.
Then:-
L carbon = L
L nichrome = 22 * L
The total length of the resistor is:-
L carbon + L nichrome = L + 22 * L = 23 * L.
Reversing the values into the equation
R = ρ * L / A:-
R = 0.05 * 23 * L / (π * r²)
Solving for L:-
L = R * (π * r²) / (0.05 * 23)
Hence, the length of the carbon wire is L carbon = L, and the length of the nichrome wire is L nichrome = 22 * L.
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What is the acceleration due to gravity on a 9.8 x 1026 kg planet that has a radius of 2.8 x 107 m?
The acceleration due to gravity on a 9.8 x 1026 kg planet that has a radius of 2.8 x 107 m g = 9.8 m/s2.
calculation using the equation:
Gravity (g) = (G x Mass of Planet)/(Radius of Planet)^2
Where G is the gravitational constant (6.67408 x 10-11m3kg-1s-2).
Therefore, gravity (g) = (6.67408 x 10-11m3kg-1s-2 x 9.8 x 1026 kg)/(2.8 x 107 m)^2
g = 9.8 m/s2
What is acceleration due to gravity?
Acceleration due to gravity is the acceleration of an object in a vacuum due to the force of gravity. It is commonly denoted by g and has a value of 9.8 m/s² or 32.2 ft/s² at sea level on Earth.
Therefore, The acceleration due to gravity on a 9.8 x 1026 kg planet that has a radius of 2.8 x 107 m g = 9.8 m/s2.
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I put a velocity of 5m/s up on a 2kg mass on a spring with a k value of 150N/m. What is the PE of the spring at the maximum, and what is the amplitude? What is the T?
The PE of the spring at the maximum is [tex]375J[/tex] and Temperature T is [tex]0.907s[/tex]
The potential energy of the spring at the maximum is the elastic potential energy. This is equal to the work done on the spring (the product of force and displacement) and is given by the equation:
[tex]PE =\frac{ 1}{2}kx^2[/tex], where k is the spring constant, and x is the displacement.
In this case, the displacement is equal to the amplitude of the spring, given by the equation:
[tex]A = (\frac{v^{2}}{k})^{1/2}[/tex], where v is the velocity.
Substituting this into the equation for PE, we get:
[tex]PE =\frac{ 1}{2}k(\frac{v^{2}}{k})^{2 }\\\\=\frac{ 1}{2}kv^{2}[/tex]
Plugging in the values for k and v given in the question, we get [tex]PE = \frac{1}{2}*150N/m*(5m/s)^2\\ \\PE= 375J.[/tex]
The equation provides the spring's duration:
[tex]T = 2\pi (m/k)^{1/2}[/tex]
where m is the mass of the object.
Substituting the values for m and k given in the question, we get:
[tex]T = 2\pi(\frac{2kg}{150N/m})^{1/2}\\\\ T= 0.907s.[/tex]
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Again some as last 40 pionts and brianlest
Which of these statements is true of the impacts of climate change?(1 point)
Responses
They have become less severe over time.
They will impact human food supplies.
They affect plants and animals more than people.
They are mostly associated with oceans.
They will impact human food supplies.
Climate change is affecting food production by causing changes in temperature, precipitation patterns, and extreme weather events, which can reduce crop yields and disrupt food systems. This, in turn, can impact food security and increase food prices, particularly for vulnerable populations. Climate change is also affecting the distribution of fish and other aquatic species, which are critical sources of protein for many communities.
In fact the statement that the climate change affects plants and animals more than people can be considered as true. Because, they cannot have sufficient protection as humans have.
What are climate changes ?The climate is the change in whether for a longer period of time over an area. The climate changes in each season and apart from that, some worse conditions in earth make some dramatic climate changes which badly affects all living and non- living things in the world.
The global warming is the notable climate change occurring in earth due to the uncontrolled emission of gases like carbon dioxide. The rise in temperature melts the ices and rises the sea level which leads to the extinction of some polar animals.
Plants and animals are more pronged to these changes because they don' t have sufficient protection against the threatening climatic changes. Hence, option C is correct.
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how many circuit courts of appeal are in the federal system?
12 regional circuits courts of appeal are in the federal system .
There are 13 appellate courts that sit below theU.S. Supreme Court, and they're called theU.S. Courts of prayers. The 94 civil judicial sections are organized into 12 indigenous circuits, each of which has a court of prayers. The appellate court’s task is to determine whether or not the law was applied rightly in the trial court. Appeals courts correspond of three judges and don't use a jury.
A court of prayers hears challenges to quarter court opinions from courts located within its circuit, as well as prayers from opinions of civil executive agencies.
In addition, the Court of prayers for the Federal Circuit has civil governance to hear prayers in technical cases, similar as those involving patent laws, and cases decided by theU.S. Court of International Trade and theU.S. Court of Federal Claims.
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on still water, olive can paddle her kayak 5 m / s . she wishes to cross a river which flows east at 2 m / s . if olive is standing on the south bank, and would like to reach a point directly across the river on the north bank, at what angle upstream (west of north) should she point her kayak?
Olive should position her kayak at a 21.5 degree angle upstream (west of north).
What does physics mean by downstream vs. upstream?One of the variations is when the boat travels downstream in the same direction as the river. We refer to this as the downstream motion. However, we refer to the motion of a boat travelling upstream when it does so in the opposite direction as a stream or river.
By deducting the velocity of the river from the velocity of the kayak, one may get the velocity of Olive's kayak in relation to the river:
v_relative = v_kayak - v_river
v_kayak = 5 m/s to the North (since Olive can paddle at 5 m/s on still water)
v_river = 2 m/s to the East
Using the Pythagorean theorem, we can find the magnitude of the relative velocity:
|v_relative| = sqrt((5 m/s)^2 + (2 m/s)^2) = 5.39 m/s
The angle upstream (west of north) that Olive should point her kayak can be found using the inverse tangent function:
tan(theta) = opposite / adjacent
opposite = v_relative * sin(alpha)
adjacent = v_relative * cos(alpha)
Now we can solve for theta:
theta = atan(opposite / adjacent)
We can substitute the expressions for opposite and adjacent in terms of v_relative and alpha:
theta = atan(v_relative * sin(alpha) / v_relative * cos(alpha))
Simplifying, we get:
theta = atan(tan(alpha))
Using trigonometry, we can find the angle alpha:
sin(alpha) = opposite / hypotenuse = 2 m/s / 5.39 m/s = 0.371
alpha = asin(0.371) = 21.5 degrees
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A 1000 kg car traveling South at 20.0 m/s collides with a 1200 kg car traveling East at 20.0 m/s. The
two vehicles entangle after the collision and head off as one. What is the velocity of the combined
wreckage immediately after the collision?
The velocity of the combined wreckage immediately after the collision is approximately 10.91 m/s to the East and 9.09 m/s to the South.
How to solve this problemFirst we can use the , which states that the total momentum of a system is conserved in the absence of external forces. In this case, the system is the two cars before and after the collision.
The total momentum of the system before the collision can be calculated as the vector sum of the momenta of the two cars, where the momentum of each car is the product of its mass and velocity:
P_total,before = P_car1 + P_car2
where
P_car1 = m_car1 * v_car1_south (momentum of the first car, traveling South)P_car2 = m_car2 * v_car2_east (momentum of the second car, traveling East)Substituting the given values, we have:
P_car1 = 1000 kg * 20.0 m/s * (-j) = -20,000 kg·m/s·j (using the South direction as the negative j direction)
P_car2 = 1200 kg * 20.0 m/s * i = 24,000 kg·m/s·i (using the East direction as the positive i direction)
Note that we are using a coordinate system where the x-axis is pointing East and the y-axis is pointing North, so the unit vectors i and j represent the East and North directions, respectively.
Thus, the total momentum of the system before the collision is:
P_total,before = -20,000 kg·m/s·j + 24,000 kg·m/s·i
= (-20,000 kg·m/s) j + (24,000 kg·m/s) i
After the collision, the two cars entangle and move as one object with a common velocity. Let's call this velocity v_combined. The momentum of the combined wreckage can be expressed as:
P_total,after = (m_car1 + m_car2) * v_combined
Substituting the given values, we have:
P_total,after = (1000 kg + 1200 kg) * v_combined
= 2200 kg * v_combined
According to the conservation of momentum, the total momentum of the system is conserved before and after the collision. Therefore, we can set the total momentum before the collision equal to the total momentum after the collision:
P_total,before = P_total,after
Solving for v_combined, we get:
v_combined = P_total,before / (m_car1 + m_car2)
Substituting the previously calculated values, we have:
v_combined = (-20,000 kg·m/s j + 24,000 kg·m/s i) / (1000 kg + 1200 kg)
= (-20,000/2200) m/s j + (24,000/2200) m/s i
= -9.09 m/s j + 10.91 m/s i
Therefore, the velocity of the combined wreckage immediately after the collision is approximately 10.91 m/s to the East and 9.09 m/s to the South.
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if a gymnast leaves the ground with a vertical velocity of 9.81 m/s when doing a back flip, where in her trajectory will her center of mass be 1.0 seconds later?
The correct option is B. Her trajectory will her center of mass be 1.0 seconds later at the apex.
[tex]V = V_0 - g*t[/tex]
where,
[tex]V_0 = initial velocity[/tex]
acceleration due to gravity = 9.8 m/s^2
t = 1.0 seconds
substituting the above values in the equation;
[tex]V_0 = 9.8 m/s + 9.8m/s^2*1.0 sec\\V_0 = 19.6 m/s[/tex]
**Hence after 1.0 sec the gymnast would almost reach 19.6 m as distance.
According to the trajectory of mass thrown uniformly,
[tex]H_(max)= v^2/ 2*g = 19.6^2/2*9.8 = 19.6 m[/tex] ----> indicates the mass reaches the peak after a time of 1.0 seconds
Speed is the directional velocity of an item in motion as an indication of its price of exchange in the role as located from a selected frame of reference and as measured through a specific widespread of time (e.g. 60 km/h northbound). speed is a fundamental concept in kinematics, the branch of classical mechanics that describes the motion of our bodies.
Velocity is a physical vector amount; both value and route are had to outline it. The scalar absolute value (magnitude) of velocity is referred to as pace, being a coherent derived unit whose quantity is measured in the SI (metric system) as meters according to 2nd (m/s or m⋅s−1). as an example, "five meters per 2d" is a scalar, while "five meters in keeping with 2d east" is a vector. If there may be a change in velocity, course, or both, then the object is said to be present process an acceleration.
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Complete Question:
If a gymnast leaves the ground with a vertical velocity of 9.81 m/s when doing a back flip, where in her trajectory will her center of mass be 1.0 sec later? Show the equation applied!
a) Approaching the apex
b) at the apex
c) descending from the apex
d) on the ground
e) not enough information
a bit of the sunlit side of the moon shows with the light side being on the left called___
A bit of the sunlit side of the moon shows with the light side being on the left called as the darkside.
What is darkside?
The dark side of the moon is an idiom which refers to the unknown, mysterious and perhaps dangerous aspects of life. It describes the things that are hidden from us, the things that are hard to understand, and the things that can cause us harm. The phrase has been used to refer to the hidden depths of the human psyche, the unknown forces of the universe, and the unknown aspects of a person's life. It can also refer to a person's hidden and perhaps darker motivations and desires, as well as the unknown risks associated with decisions that people make. The phrase is a reminder that life is unpredictable and sometimes dangerous, and that people should be aware of the potential consequences of their decisions.
Therefore, A bit of the sunlit side of the moon shows with the light side being on the left called as the darkside.
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Is 0.8 electronegativity polar or nonpolar?
In the case of 0.8 electronegativity, a molecule or bond is polar based on this value.
Polarity depends on the difference in electronegativity between atoms in a bond or molecule. If the difference in electronegativity between atoms is small or zero, the bond or molecule is generally considered nonpolar, whereas if the difference in electronegativity is large, the bond or molecule is generally considered polar.
Electronegativity is a measure of an atom's ability to attract electrons towards itself when participating in a chemical bond. However, electronegativity values are not used to determine the polarity of a molecule or bond directly.
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can someone please help me answer this
Answer:
Rₓ = -10 N
Explanation:
The x-component of a vector R can be found using the following formula:
[tex]\boxed{{R_x = Rcos \ \theta}}[/tex],
where Rₓ is the x-component of R and Θ is the angle between the vector and the positive x-axis.
The 60° angle in the diagram is formed between the vector R and the negative x-axis. The angle we need, Θ, is its supplementary angle. Therefore,
Θ = 180° - 60°
= 120°
Now that we have the value of Θ, we can find its x-component using the formula above:
[tex]{{R_x = Rcos \ \theta}}[/tex]
⇒ [tex]R_x = 20 \times cos(120^{\circ})[/tex]
⇒ [tex]R_x = \bf -10[/tex]
Therefore, the x-component of R is -10 N.
How do the physical and chemical properties contribute to the function of the synthetic products from gold
The physical properties of gold, such as its malleability, ductility, and electrical/thermal conductivity, are important for making synthetic products from gold.
What is physical properties?Physical properties are characteristics of a material that can be observed without changing the composition of the material. Examples of physical properties include color, density, hardness, electrical conductivity, melting point, boiling point, and solubility.
From a chemical perspective, gold is a relatively inert element, meaning it is resistant to oxidation and other chemical reactions. This makes it ideal for use in applications where it may be exposed to harsh environments or corrosive materials, such as medical implants and aerospace components. Additionally, gold's unique properties make it suitable for use in catalytic reactions, meaning it can speed up chemical reactions without itself being consumed or affected. This is used in a variety of industries, such as the production of pharmaceuticals, food additives, and polymers.
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what is the charge configuration that makes that would produce this electric potential? is it a point charge? line charge? circular charge? or some sort of combination of different kinds of charge?
The negative X axis is where the electric field is pointing. High magnitude (intensity) electric field lines exist in the proper direction or at x > 35. Since the electric field lines resemble straight lines.
this indicates that line charges are what create them. An electric field is a fundamental concept in physics that describes the effect of electric charges on the space around them. An electric field is a vector field that describes the force experienced by a charged particle in the presence of other charged particles. The electric field is defined as the force per unit charge that a charged particle would experience if it were placed in the field. Electric fields can be created by charged particles, such as protons or electrons, or by electric charges on conductive objects. The strength of an electric field decreases with distance from the source of the field and is represented by electric field lines, which provide a visual representation of the field's direction and strength. Electric fields are important in many areas of science and engineering, including electronics, electromagnetism, and telecommunications.
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What is the angle between two vectors if magnitude of their vector product is equal three times their scalar product
Answer:
θ = 60°
Explanation:
The magnitude of the vector product of two vectors is three times their scalar product. What is the angle between the two vectors? Let A and B be the two vectors, and θ be the angle between them. θ = 60°.
when you weigh yourself on a bathroom scale on a slight incline instead of a level surface, your weight reading on the scale will be
The answer is C) more. When a bathroom scale is placed on an incline, the weight will be greater than when placed on a level surface due to the increased force of gravity.
This can be explained mathematically using the equation[tex]F = mg[/tex], where F is the force, m is the mass, and g is the acceleration due to gravity. If the scale is on an incline, the force of gravity on the object will be greater than if it were on a level surface, resulting in a higher weight reading on the scale.Gravity is a force of attraction between two objects that is proportional to the product of their masses and inversely proportional to the square of the distance between them.
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complete question:When you weigh yourself on a bathroom scale on a slight incline instead of a level surface, your weight reading on the scale will be
A) less.
B) no different.
C) more.
suppose you see the trace above on your oscilloscope. you have set the vertical scale to 5 volt per square and the horizontal to 2 ms per square. what is the period of the signal? what is the frequency of the signal?
The period of the signal is 9 ms and the frequency is approximately 111.1 Hz, calculated using f = 1/T.
To decide the period and recurrence of the sign displayed on the oscilloscope follow, we want to quantify the time span between two nearby pinnacles.
From the oscilloscope follow, we can see that the time stretch between two nearby pinnacles is around 4.5 squares on the even hub, which relates to 4.5 x 2 ms = 9 ms.
Hence, the time of the sign is 9 ms.
To ascertain the recurrence of the sign, we can utilize the equation:
recurrence = 1/period
Subbing the worth of the period, we get:
recurrence = 1/9 ms = 111.1 Hz
Consequently, the recurrence of the sign is around 111.1 Hz.
To decide the period, we really want to gauge the time it takes for the sign to finish one full cycle. For this situation, we can see that the sign finishes one full cycle in around 9 ms. The recurrence, which is the quantity of cycles each second, can then be determined utilizing the equation recurrence = 1/period, which gives a recurrence of roughly 111.1 Hz.
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a ball of mass 3 kg sits on the ground at a distance from the center of the earth equal to the radius of the earth. what is the difference in this objects weight (in lbs) when comparing to the same object placed at the top of mount everest at a height of 8850 meters above this level?
The difference in weight of the ball between the surface of the Earth and the top of Mount Everest is approximately 0.02 pounds.
The weight of an object is given by the product of its mass and the acceleration due to gravity at its location. The acceleration due to gravity depends on the distance from the center of the Earth, and it decreases as the distance from the center of the Earth increases.
At the surface of the Earth, the acceleration due to gravity is approximately 9.81 m/s². The radius of the Earth is approximately 6,371 km. Therefore, the weight of the ball at the surface of the Earth is:
Weight = mass x acceleration due to gravity
= 3 kg x 9.81 m/s²
= 29.43 N
To find the weight of the ball at the top of Mount Everest, we need to calculate the acceleration due to gravity at that altitude. We can use the fact that the acceleration due to gravity decreases with the square of the distance from the center of the Earth. The distance from the center of the Earth at the top of Mount Everest is:
Distance = radius of the Earth + height of Mount Everest
= 6,371 km + 8.85 km
= 6,379.85 km
The acceleration due to gravity at this distance is:
acceleration due to gravity = (acceleration due to gravity at the surface of the Earth) x (radius of the Earth / distance)²
= 9.81 m/s² x (6,371 km / 6,379.85 km)²
= 9.78 m/s²
Therefore, the weight of the ball at the top of Mount Everest is:
Weight = mass x acceleration due to gravity
= 3 kg x 9.78 m/s²
= 29.34 N
The difference in weight is the weight at the surface of the Earth minus the weight at the top of Mount Everest:
Difference in weight = Weight at surface - Weight at Everest
= 29.43 N - 29.34 N
= 0.09 N
To convert to pounds, we can divide the weight in newtons by the conversion factor 4.448 N/lb:
Difference in weight = 0.09 N / 4.448 N/lb
= 0.02 lb (rounded to two decimal places)
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several small molecules are important to biochemical systems. you have isolated one of these and to identify it you determine its molar mass. you release 0.37 g of the gas into a flask with a volume of 732 ml at 21 °c. the pressure in the flask is 209 torr. what is the unknown gas?
The molar mass of 34.26 g/mol corresponds to the molar mass of nitrogen gas (N2) which is 28.02 g/mol. So the unknown gas is probably nitrogen.
To identify an unknown gas, we need to determine its molar mass. You can use the ideal gas law to calculate the molar mass. The ideal gas law is:
PV = nRT
where P is pressure, V is volume, n is number of moles, R is gas constant, and T is temperature in Kelvin. To calculate the molar mass, rearrange the ideal gas law and solve for n.
n = PV/RT
The value of the gas constant R is 0.0821 L-atm/mol-K. To convert temperature to Kelvin, add 273.15 to the temperature in °C. Pressure must be converted from torr to atm. One atmosphere equals 760 torr, so:
P = 209 torr / 760 torr/atm
P = 0.2758 atmospheres
Additionally, we need to convert the volume from mL to L. 1 L = 1000 mL, V=732mL/1000mL/L
V = 0.732L
Now that we have all the values we need, we can plug them into the ideal gas law equation to calculate the number of moles.
n = 0.2758 atm * 0.732 L / (0.0821 L-atm/mol-K * (21 + 273.15 K))
n = 0.0108 mol. The mass of the gas is given as 0.37 g, so the molar mass can be calculated as
molar mass = mass / mol
= 0.37 grams/0.0108 moles
= 34.26 g/mole
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he fact that the elements of life were produced in stars suggests the following two things: a. (1) these elements have become more common as the universe has grown older. (2) these elements are the most common elements in the universe. b. (1) the universe began in a big bang. (2) the elements of life exist in all stars. c. (1) these elements only exist in very old stars. (2) these elements are extremely rare. d. (1) these elements have become more common as the universe has grown older. (2) these elements should be found in nearly all star systems.
The correct answer is (d): (1) these elements have become more common as the universe has grown older. (2) these elements should be found in nearly all star systems.
The elements that make up life (such as carbon, nitrogen, oxygen, and iron) are created in stars through nuclear fusion and supernova explosions. As the universe has grown older, more and more stars have been born and died, producing these elements and spreading them throughout the universe. Therefore, these elements have become more common over time.
Additionally, because these elements are created in stars, they should be found in nearly all star systems. While the exact abundance of these elements may vary depending on the age and type of star, they should be present in some amount in most stars.
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A man stands on a bathroom scale placed on the floor of a stationary elevator with the scale reading 740 N. What will be the reading on the scale when the elevator accelerates upward with an acceleration of 5.2 M/s2? Take g = 9.8 m/s2.
NEED ASAP PLEASE
Reading on the scale will be 1130 N when the elevator accelerates upward with an acceleration of 5.2 m/s2.
What is meant by acceleration?Change in velocity over the change in time is acceleration and is represented by : a = Δv/Δt.
Formula to calculate the apparent weight (W') is given by:
W' = W + ma
W is true weight of the person, m is mass of the person, and a is acceleration of the elevator.
Given, W = 740 N, a = 5.2 m/s2.
W = mg
g is acceleration due to gravity, which is 9.8 m/s2.
740 N = m * 9.8 m/s2
m = 740 N / 9.8 m/s2 = 75.5 kg
W' = W + ma = 740 N + (75.5 kg)(5.2 m/s2) = 740 N + 390 N = 1130 N
So, the reading on the scale will be 1130 N when the elevator accelerates upward with an acceleration of 5.2 m/s2.
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How are Van Allen belts formed?
O High-energy particles from the Sun get trapped in Earth's magnetic field
O Metals in Earth's core sink and rise, producing a circular movement of the metals.
O Srticles in solar wind travel along lines of Earth's magnetic field and collide with gas atoms.
O Material from the surface of the Sun erupts and forms a loop due to the Sun's magnetic field.
The Van Allen belt is formed when High-energy particles from the Sun get trapped in Earth's magnetic field
How are Van Allen belts formed?The Van Allen belts are fields in outer space caused by Earth's magnetism. Magnetic striping is evidence of seafloor unfurling. The inner Van Allen belt is located usually between 6000 and 12 000 km (1 - 2 Earth radii [RE]) above Earth's surface, although it formed dips much near the South Atlantic Ocean. The outer radiation belt covers altitudes of roughly 25 000 to 45 000 km (4 to 7 RE).
Space scientist James Van Allen and his team at the University of Iowa were the first to locate the radiation belts, now also mention to as "The Van Allen Belts."
So we can conclude that The Van Allen belts were first discovered in 1958
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High-energy particles from the Sun get trapped in Earth's magnetic field.
option A.
How are Van Allen belts formed?The Van Allen belts are formed due to the interaction of charged particles from the solar wind with Earth's magnetic field. High-energy particles from the Sun get trapped in Earth's magnetic field, creating two belts of charged particles that encircle the planet.
The inner belt is made up of highly energetic protons, while the outer belt consists of energetic electrons. The charged particles are trapped by the magnetic field and follow magnetic field lines that are shaped like a torus (doughnut) around the Earth. This creates the Van Allen belts, which can extend several thousand kilometers into space and protect the Earth from the harmful effects of charged particles in the solar wind.
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. a common statistic in car tests is the standing (starting from rest) quarter-mile performance. a modern sports car can achieve a terminal speed (speed at the end of the quarter-mile) of 120 mph (193 km/h). how does the average acceleration compare to g? (0.25 mile
The required acceleration of the car compared to g is 0.36 times the value of g.
The velocity v of the car is given as 193 mph = 193× 18/5 = 53.61 m/s.
The distance covered = 0.25 miles = 0.25× 1609 m/ 1 mile = 402.336 m
Initial velocity u = 0
Let us find the acceleration of the car using the equation of motion.
v² - u² = 2 a s
where,
v is final velocity
u is initial velocity
a is acceleration
s is distance
Entering values in the above equation, we have,
53.61² - 0 = 2 a (402.336)
804.672 a = 2874.03
a = 3.57 m/s²
Let us compare it with the value of 'g',
a/g = 3.57/9.8 = 0.36
So, a = 0.36 g
Thus, the acceleration of the car is 0.36 times the value of g.
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A baggage handler drops your 10 kg suitcase onto a conveyor belt running at 1.5 m/s. The materials are such that s = 0.50 and k = 0.20. How far is your suitcase dragged before it is riding smoothly on the belt?
The suitcase is dragged approximately 0.58 meters before it is riding smoothly on the conveyor belt.
What is drag force?Drag force is a force that resists the motion of an object through a fluid (such as air or water) due to the frictional forces between the object's surface and the fluid.
Here,
The initial velocity of the suitcase is zero since it was dropped from rest. The suitcase will accelerate until the kinetic friction force between it and the conveyor belt matches the force of gravity acting on it, resulting in a constant velocity. We can use the following equation to find the distance traveled by the suitcase until it reaches a constant velocity:
[tex]d = (v_f^2 - v_i^2) / (2 * \mu* g)[/tex]
We know the final velocity of the suitcase is 1.5 m/s, the coefficient of kinetic friction is 0.20, and g is 9.81 m/s^2. Substituting these values into the equation, we get:
[tex]d = (1.5^2 - 0) / (2 * 0.20 * 9.81)[/tex]
d ≈ 0.58 meters
Therefore, the suitcase is dragged approximately 0.58 meters before it is riding smoothly on the conveyor belt.
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Explain why poople should be encouraged to use energy efficient electical devices.
People should be encouraged to use energy-efficient electrical devices. Because energy effective electrical devices uses more energy than energy-efficient electrical devices.
70% of Electrical power generated from non renewable sources. More energy requires more non-renewable resources it leads to produce more green house gases. It harms to ozone layer. Ozone layer damage leads increases temperature in the world ,droughts and food insecurity.
Here some of the advantages to use energy-efficient electrical devices.
Reduce green house gases.Low energy consumption.Reduce carbon footprintTo know more about, energy-efficient
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distinguish between aerobic and anaerobic respiration write any 3points
A power source supplies a prescribed voltage and is used to power a light bulb. If another light bulb is connected in parallel to the first how would it affect the current in the power source?
1) Cannot be Determined.
2) The current would remain the same.
3) The current would decrease.
4) The current would increase.
Power will treble with an increase in voltage. The current (or flow of electrons) will rise in direct proportion to the voltage (or electrical pressure) in a circuit; for example, doubling the voltage will result in a doubling of the current flow. Thus, option D is correct.
What affect the current in the power source?The voltage and resistance in a circuit that prevent current flow determine how many current flows through it. Similar to voltage, resistance is a number that depends on two locations.
According to Ohm's law, the voltage (V) and resistance (R) in a circuit are both inversely correlated with the electrical current (I) that flows through the circuit (R). Since the resistance of the circuit remains constant, if the voltage is raised, the current will rise as well.
Therefore, current would increase in the power source.
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