Answer:
The atomic number of the element in this notation is 15.
Explanation:
The X notation for an atom provides information about its atomic number and mass number. The atomic number is the number of protons in the nucleus of an atom, which determines its chemical properties and identity as an element. The mass number is the sum of the number of protons and neutrons in the nucleus.
In the notation "32 on 15 X", the number on the top (32) represents the mass number of the atom, which is the total number of protons and neutrons in the nucleus. The number on the bottom (15) represents the atomic number of the atom, which is the number of protons in the nucleus.
Therefore, the atomic number of the element in this notation is 15.
state ohmic conductor
Answer:
An ohmic conductor is defined as one which obeys ohm's law that is V ∝ I where is the voltage and is the current. There must be a linear graph. Silver is an example of an ohmic conductor as the graph for silver is a linear graph. Silver and copper are some examples of ohmic conductor
Orange light with a wavelength of 5.89 E−7 m is used in Young's experiment with the slits separated by a distance of 1.20 E−4 m. The screen is located at a distance from the slits of 4.07 m. Calculate the distance on the screen between the central bright fringe and the first bright fringe. Show all work for full credit.
The distance on the screen between the central bright fringe and the first bright fringe is 0.0199 meters.
Young's double-slit experiment is a classic experiment that demonstrates the wave nature of light. It involves shining light through two closely spaced slits and observing the interference pattern on a screen.
In Young's double-slit experiment, the distance between the central bright fringe and the first bright fringe can be calculated using the equation:
y = (mλD) / d
where:
y = distance between fringes
m = order of the fringe (m=1 for first bright fringe)
λ = wavelength of light
D = distance from the slits to the screen
d = distance between the slits
Plugging in the given values, we get:
y = (1 * 5.89 E-7 m * 4.07 m) / 1.20 E-4 m
y = 1.99 E-2 m or 0.0199 m
Therefore, the distance on the screen between the central bright fringe and the first bright fringe is approximately 0.0199 meters.
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Describe what role resonance could have played in the bridge’s oscillations. Look up the London Millennium Bridge. What role did resonance play in that near-disaster?
A cart with mass m subscript 1 equals 0.25 space k g is at rest on a track. A second cart of mass m subscript 2 equals 0.35 space k g is pushed down the track and collides with it. The carts stick together after the collision. The second cart's speed immediately before the collision is v subscript 02 equals 6.17 space m divided by s. The overall magnitude of the carts' common final velocity is _______________ (enter the numerical value only, in m/s).
After considering the given data and information we come to the conclusion that overall magnitude of the carts' common final velocity is 3.6 m/s, under the condition that a cart with mass m subscript 1 equals 0.25 space k g is at rest on a track.
Then, we can apply the law of conservation of momentum to evaluate the common final velocity of the carts.
The law of conservation of momentum projects that the total momentum of an isolated system stays constant if no external forces act on it. For this required case, the system is the two carts.
Before the collision, the first cart is in the rest and the second cart has a velocity of 6.17 m/s. Hence, the total momentum of the system before the collision is
p = m₁v₁ + m₂v₂
Here,
m1 and m2 are the masses of the carts and `v1` and `v2` are their velocities.
Staging the given values,
p = (0.25 kg)(0 m/s) + (0.35 kg)(6.17 m/s)
Applying simplification this expression
p = 2.16 kgm/s
Post the event of collision, the two carts stick along each other and move with a common final velocity `v`. The total momentum of the system after the collision is
p = (m₁ + m₂)v
Staging the given values, and evaluate for v
v = p / (m₁ + m₂)
Staging the given values
v = (2.16 kgm/s) / (0.25 kg + 0.35 kg)
v = 2.16/0.6
Applying simplification this expression
v ≈ 3.6 m/s
Then, the overall magnitude of the carts' common final velocity is approximately 3.6 m/s.
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Read Computer about essay and Semiconductors calculators present your about page.
Semiconductors are a fundamental component of up-to-date electronics. They are matters that can conduct electricity under certain environments, but not under others, making the ruling class extremely adjustable.
What is silicon and how is it a semiconductor?Silicon is the most widely used semiconductor material, but different materials in the way that germanium and gallium arsenide are also secondhand in specific uses.
By doping the semiconductor material with particular impurities, it is attainable to create either beneficial or negative charges, allowing for the creation of diodes, transistors, and additional electronic components. These parts have revolutionized the habit we live, from the smartphones we carry in our pockets to the computers we use continually.
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Image shows question, please help
Jonathan needs to maintain a separation of 0.543 mm between the plates to get the desired charge, and a dielectric constant of 92.6 to achieve a separation of 5 mm with a dielectric.
(a) Using the equation Q = CV, where Q is the charge, C is the capacitance, and V is the voltage, we can solve for the capacitance: C = Q/V =[tex](8.15 x 10^-9 C) / (50 V) = 1.63 x 10^-10 F.[/tex]
Then, using the formula for capacitance of parallel plate capacitors: C = ε0A/d, where ε0 is the permittivity of free space, A is the area of the plates, and d is the separation distance, we can solve for the separation distance: d =[tex]_{3}OA/C = (8.85 x 10^-12 F/m) x (0.01 m^2) / (1.63 x 10^-10 F) = 0.543 mm.[/tex]
(b) To find the dielectric constant, we can use the formula for capacitance of a parallel plate capacitor with a dielectric: C = εrε0A/d, where εr is the relative permittivity or dielectric constant of the material. Solving for εr, we get: εr = Cd / ε0A = [tex](1.63 x 10^-10 F)[/tex] x (0.005 m) / [tex](8.85 x 10^-12 F/m)[/tex] x [tex](0.01 m^2)[/tex] = 92.6.
Therefore, Jonathan should use a dielectric with a relative permittivity of 92.6 to achieve a separation of 5 mm.
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A puffin flies through a fjord with 24 J of KE. If she doubles her speed, what will be her new KE (in J)?
A puffin flies through a fjord with 24 J of KE. If she doubles her speed, the new KE of the puffin will be 96 J.
Assuming the mass of the puffin remains constant, KE of puffin can be calculated as:
KE = [tex](1/2)mv^2[/tex]
where m = mass of the puffin, and v = initial velocity of the puffin
Let's assume that the initial velocity of the puffin is v and its KE is 24 J. Therefore,
24 = [tex](1/2)mv^2[/tex]
Solving for v, we get:
v = [tex]\sqrt{((2*24)/m)[/tex]
Now, if the puffin doubles its speed, new velocity will be 2v. Therefore, the new KE can be calculated as:
KE_new = ([tex]1/2)m(2v)^2 = 4(1/2)mv^2[/tex]= 4(24) = 96 J
Therefore the new KE of the puffin will be 96 J if it doubles its speed.
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O A car covers distance of 1.5km in Iminute and 5 km in 4 minutes Calculate average velocity of car.
Answer:
Jim Crow Laws Effects.
User
What were Jim Crow laws? Your response should also describe at least two effects Jim Crow laws
had on the rights of Black Americans. (4 points)
ChatGPT
Jim Crow laws were a set of state and local laws in the United States, enacted between the 1870s and 1960s, that enforced racial segregation and discrimination against Black Americans. These laws were named after a popular 19th-century minstrel show character who stereotyped African Americans.
Two effects of Jim Crow laws on the rights of Black Americans were:
Limited access to public facilities: Jim Crow laws mandated that public spaces such as schools, parks, hospitals, and restaurants were segregated by race. Black Americans were often denied access to public spaces that were reserved for white people. This segregation limited the ability of Black Americans to participate fully in public life and access resources and opportunities that were available to white Americans.
Restricted voting rights: Jim Crow laws were used to disenfranchise Black Americans by making it difficult or impossible for them to vote. These laws included literacy tests, poll taxes, and other requirements that were designed to exclude Black Americans from voting. As a result, many Black Americans were unable to exercise their constitutional right to vote until the Voting Rights Act of 1965 was passed. This restriction on voting rights undermined the ability of Black Americans to participate fully in democracy and have their voices heard.
User
Gavin can type 1/2 page of his book report in 5 3/4 minutes what’s the typingrate
ChatGPT
To calculate Gavin's typing rate, we need to divide the amount he can type by the time it takes him to type it.
First, we need to convert the mixed number 5 3/4 into an improper fraction:
5 3/4 = (4 x 5 + 3)/4 = 23/4
Next, we can convert the mixed number 1/2 into an improper fraction:
1/2 = 2/4
Now, we can add the two fractions:
23/4 + 2/4 = 25/4
This means that Gavin can type 25/4 pages in 5 3/4 minutes.
To find Gavin's typing rate, we need to divide the amount he can type (25/4 pages) by the time it takes him to type it (5 3/4 minutes):
Typing rate = (25/4) / (5 3/4)
To divide fractions, we can multiply the first fraction by the reciprocal of the second fraction:
Typing rate = (25/4) x (4/23)
Simplifying the fractions, we get:
Typing rate = 25/23
Therefore, Gavin's typing rate is 25/23 pages per minute.
User
A car covers distance of 1.5km in Iminute and 5 km in 4 minutes Calculate average velocity of car.
ChatGPT
Average velocity is defined as the displacement (change in position) of an object divided by the time interval during which that displacement occurred.
In this case, we know the distance covered by the car and the time it took to cover that distance. However, we need to calculate the displacement in order to find the average velocity.
Displacement is the change in position of an object, regardless of how much distance it covered to get there. We can find the displacement of the car by subtracting its initial position from its final position.
Let's assume that the car's initial position is at 0 km. Then, its final position after covering a distance of 1.5 km is 1.5 km. Similarly, its final position after covering a distance of 5 km is 5 km.
Therefore, the displacement of the car is:
Δx = xf - xi = 5 km - 0 km = 5 km
Now we can calculate the average velocity of the car as follows:
average velocity = displacement / time
The time it took the car to cover 1.5 km is 1 minute, and the time it took to cover 5 km is 4 minutes. Therefore, the total time taken is 1 + 4 = 5 minutes.
average velocity = 5 km / 5 min = 1 km/min
Therefore, the average velocity of the car is 1 km/min.
What is defined as a set of coordinates on a map grid? > ω
A set of coordinates on a map grid are called coordinate grid or grid squares.
The quadrants in which ordered pairings, or coordinates, are established typically have two or more intersecting lines. Coordinates are also used in maps.
Eastings and Northings, two types of grid lines, are what make up the grid squares you see on maps. Both Easting and Northing grid lines are numbered from west to east and from south to north, respectively. The vertical lines that separate the map's west and east halves are known as eastings.
GPS coordinates, which are frequently stated in alphanumeric characters, can be used to uniquely identify a specific geographic place on the planet. In this context, coordinates refer to the points where a grid system intersects. Typically, GPS coordinates are written as a combination of latitude and longitude.
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Two objects are dropped from a bridge, an interval of 1.0 s apart, and experience no appreciable air resistance. As time progresses, the DIFFERENCE in their speeds
a.
increases.
b.
remains constant.
c.
decreases.
d.
increases at first, but then stays constant.
e.
decreases at first, but then stays constant.
Answer: a
Explanation:
** State the reason why heat transfer by radiation is faster than heat transfer by conduction
Heat transfer by radiation is faster than heat transfer by conduction because radiation can occur through a vacuum, while conduction requires the presence of a medium, such as a solid, liquid, or gas. Radiation is the transfer of energy through electromagnetic waves and does not require any medium to propagate, which means that radiation can occur even in a vacuum or through transparent materials.
On the other hand, conduction requires particles to transfer heat energy from one object to another. In a solid, this occurs through the transfer of kinetic energy from one molecule to another through direct contact, while in a liquid or gas, conduction occurs through collisions between molecules. This process of molecule-to-molecule transfer of heat energy is much slower than radiation and is limited by the physical properties of the medium, such as its thermal conductivity.
Therefore, heat transfer by radiation is faster than heat transfer by conduction because radiation can occur through a vacuum, and is not limited by the physical properties of a medium, while conduction is limited by the thermal conductivity of the medium and requires direct contact between molecules.
PLS HELP
See how a block and tackle system can increase your mechanical advantage. You will need two broomsticks, a rope, and two helpers.
A. Give each helper a broom stick and have them stand facing each other holding the broomstick firmly in both hands in a horizontal position. The broomsticks should be at the same level, about two feet apart.
B. Tie one end of the rope to one of the broomsticks. (You may need to have one of your helpers hold the knot firmly in one hand as he or she holds the broomstick to help anchor it.)
C. Wrap the rope around the other broomstick, as in a simple pulley system, and pull on the free end of the rope. Your helpers should resist your pulling. What happens? Can you pull the broomsticks together?
D. Now weave the rope back over the first broomstick, so you have a double pulley. Pull on the free end. What happens now? Can you pull the broomsticks together? What is your mechanical advantage?
E. Try weaving the rope over the broomsticks one or two more times. Describe what happens, and state the mechanical advantage of each situation.
F. Write a summary of what happened and an explanation using the terms: force, distance, work, mechanical advantage
The block and tackle system is a way to increase mechanical advantage by using a combination of pulleys and ropes. In this experiment, two broomsticks are used to create a simple pulley system. By tying one end of a rope to one broomstick and wrapping it around the other, a mechanical advantage can be achieved.
In the first step, the rope is tied to one broomstick and wrapped around the other. Pulling on the free end of the rope, the helpers resist your pulling, and the broomsticks don't move closer together.
In the next step, the rope is woven back over the first broomstick, creating a double pulley. Pulling on the free end of the rope, the helpers again resist your pulling, but the broomsticks move closer together. This is because the double pulley increases the mechanical advantage, allowing you to lift a heavier load with less force.
By weaving the rope over the broomsticks one or two more times, the mechanical advantage increases even further. With each additional pulley, the amount of force required to lift the load decreases.
Therefore, the block and tackle system increases mechanical advantage by using a combination of pulleys and ropes. By increasing the number of pulleys, the force required to lift a load decreases. This is achieved by spreading the force over a greater distance, allowing for the same amount of work to be done with less force.
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is woodburning heater a endothermic or exothermic process
Answer:
Wood burning in a wood-burning heater is an exothermic process.
Explanation:
An exothermic process releases energy in the form of heat, and in the case of wood burning, the combustion of wood releases heat in the form of flames and hot gases.
When wood is burned in a wood-burning heater, the carbon-based molecules in the wood are oxidized by oxygen in the air, producing carbon dioxide and water vapor, as well as heat and light energy.
Hence, the process of wood burning in a wood-burning heater is an exothermic process that releases heat energy to the surrounding environment.
8. Molecular gastronomy was created by two scientists from Oxford University.
True or false
True,
molecular gastronomy was created by two scientists from Oxford University. Molecular gastronomy is a sub-discipline of food science that investigates the physical and chemical transformations of ingredients during cooking. It was first established by physicist Nicholas Kurti and chemist Hervé This, both from Oxford University. The term "molecular gastronomy" was coined in 1988 during a workshop on the science of cooking, which aimed to bridge the gap between scientific research and culinary arts.
Molecular gastronomy explores various aspects of food, such as flavor, texture, and presentation, and combines scientific knowledge with culinary techniques. This innovative approach to cooking has led to the creation of many unique and modern dishes, often featuring unexpected combinations of ingredients and visually appealing presentations.
The objective of molecular gastronomy is not only to create innovative dishes but also to understand and improve traditional cooking methods. This has led to advancements in food technology, as well as a deeper understanding of the science behind cooking processes. As a result, molecular gastronomy has become a popular and influential trend in the culinary world, inspiring chefs and home cooks alike to experiment with new techniques and ingredients.
In summary, molecular gastronomy was created by two scientists from Oxford University, Nicholas Kurti and Hervé This. Their groundbreaking work has had a significant impact on the culinary world and has led to many exciting innovations in food preparation and presentation.
PLEASE HELP ME I BADLY NEED THIS RN I'LL MARK AS BRAINL!EST WHOEVER ANSWER THIS RIGHT!!
1. To find the distance covered by the bus in 5 hours, we can use the formula:
distance = speed x time
Here, the speed of the bus is given as 50 km/hr, and the time taken is 5 hours. Substituting these values into the formula, we get:
distance = 50 km/hr x 5 hr
distance = 250 km
Therefore, the bus covers a distance of 250 km in 5 hours at an average speed of 50 km/hr.
2. To find the distance covered by the car in 6 hours, we can use the formula:
distance = speed x time
Here, the speed of the car is given as 50 km/hr, and the time taken is 6 hours. Substituting these values into the formula, we get:
distance = 50 km/hr x 6 hr
distance = 300 km
Therefore, the car covers a distance of 300 km in 6 hours at an average speed of 50 km/hr.
3. To find the time taken by the tricycle to cover a distance of 10 km at an average speed of 5 km/hr, we can use the formula:
time = distance / speed
Substituting the given values, we get:
time = 10 km / 5 km/hr
time = 2 hours
Therefore, it will take the tricycle 2 hours to cover a distance of 10 km at an average speed of 5 km/hr.
The questions are in the pictures
A ladder is leaned against a wall. The wall has friction but the floor is frictionless. It should be noted that the ladder cannot be in static equilibrium
How to explain the equilibriumIn order for the ladder to be in static equilibrium, the net force acting on it must be zero. However, in this case, there will be a horizontal force exerted by the wall on the ladder due to friction, which will create a torque about the base of the ladder.
When a ladder is leaned against a wall, it exerts a force on the wall called the normal force, which is perpendicular to the surface of the wall. In order for the ladder to be in equilibrium, the normal force must balance the weight of the ladder and any objects on it. This torque will cause the ladder to rotate and hence, it cannot be in static equilibrium.
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This is for physics, question in pics brainliest!!!
Answer:
Construct a parallelogram ABCD with BD= 104mm, DC= 48mm and angle DBC= 30. Measure AC
if no action is taken to address the issues evaluate whether the impact of light pollution radio interference and space debris on the field of astronomy is lily to worsen lessen or remain the same during the next 50 years
If no action is taken to address the issues evaluate whether the impact of light pollution radio interference and space debris on the field of astronomy is then a. likely to worsen
Astronomers already have a serious problem with light pollution from cities and other sources, which makes it more challenging to detect dim objects in the night sky. Light pollution is predicted to get worse unless action is taken to stop it as urbanisation grows and more artificial lights are installed.
Astronomical observations can be affected by radio interference from telecommunications, and unless steps are taken to reduce the issue, the issue is only going to become worse as the number of radio-emitting devices rises. In addition, astronomers' instruments and spacecraft are increasingly in danger from space debris. The probability of collisions and other accidents is anticipated to rise as the amount of trash in space continues to rise.
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Complete Question:
If no action is taken to address the issues evaluate whether the impact of light pollution radio interference and space debris on the field of astronomy is then -
a. likely to worsen
b. lessen or remain the same during the next 50 years
A ball falls straight down through the air under the influence of gravity. There is an opposing force F~ on the ball with magnitude given by F = b v, where v is the speed of the ball and b is a positive constant. What is the magnitude of the acceleration of the ball at any time?
Answer:
Explanation:
The net force acting on the ball is given by:
F_net = F_gravity - F_air
where F_gravity is the force due to gravity acting downwards and F_air is the force due to air resistance acting upwards.
F_gravity = m g, where m is the mass of the ball and g is the acceleration due to gravity.
F_air = b v, where b is a positive constant and v is the speed of the ball.
The acceleration of the ball is given by:
a = F_net / m
Substituting the expressions for F_gravity and F_air, we get:
a = (m g - b v) / m
Simplifying, we get:
a = g - (b/m) v
Therefore, the acceleration of the ball at any time is given by g - (b/m) v, where g is the acceleration due to gravity, b is a positive constant representing the air resistance force, m is the mass of the ball, and v is the speed of the ball. As the ball falls faster, the air resistance force increases, causing the acceleration to decrease.
1. Read the paragraph and choose a sentence that describes it best. Experiencing occasional anxiety is a normal part of life. However, people with anxiety disorders frequently have intense, excessive and persistent worry and fear about everyday situations. Often, anxiety disorders involve repeated episodes of sudden feelings of intense anxiety and fear or terror that reach a peak within minutes (panic attacks).
a) Anxiety episodes are normal, during them people experience worry about every situation
b) Panic attacks are connected to people being worried too much, these episodes are a part of normal human behavior
c) Anxiety disorders and anxiety are not the same
d) Fear and terror are a part of feeling anxious
The sentence that describes anxiety best is a) Anxiety episodes are normal, during them people experience worry about every situation
The paragraph explains that while having the odd attack of anxiety is natural, anxiety disorders are characterised by severe, excessive, and chronic concern and terror over ordinary events. It also clarifies how anxiety disorders can cause recurrent episodes of extremely severe panic.
A sensation of worry, dread, and unease is known as anxiety. Sweating, agitation, and tension may be experienced, along with a quick heartbeat. It might be a typical response to stress. For instance, while dealing with a challenging issue at work, one can have anxiety prior to a test or when making a crucial choice. A person may find it useful for coping. For some with anxiety disorders, the terror can be incapacitating and last for a long time.
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Katia and Angela each have a mass of 45 kg and are moving together with a speed of 10.0 m/s.
a. What is their combined kinetic energy?
b. What is the ratio of their combined mass to Katia’s mass?
c. What is the ratio of their combined kinetic energy to Katia’s kinetic energy? Explain how this ratio relates to the ratio of their masses.
(A)Their combined kinetic energy will be 4500 J.(B) the ratio of their combined mass to Katia’s mass is 2.(C) This means that their combined kinetic energy is twice Katia’s kinetic energy. This ratio is the same as the ratio of their combined mass to Katia’s mass, as found in part b.
a. The combined kinetic energy of Katia and Angela is given by:
KE = (1/2) * (m₁ + m₂) * v²
where m₁ and m₂ are the masses of Katia and Angela, respectively, and v is their speed.
Substituting the given values, we get:
KE = (1/2) * (45 kg + 45 kg) * (10.0 m/s)² = 4500 J
Therefore, their combined kinetic energy is 4500 J.
b. The ratio of their combined mass to Katia’s mass is:
(m₁ + m₂) / m₁
(45 kg + 45 kg) / 45 kg = 2
Therefore, the ratio of their combined mass to Katia’s mass is 2.
c. The ratio of their combined kinetic energy to Katia’s kinetic energy is:
KE / KE₁
where KE1 is Katia’s kinetic energy, given by:
KE₁= (1/2) * m₁ * v²
KE₁ = (1/2) * 45 kg * (10.0 m/s)² = 2250 J
Therefore, KE / KE₁ = 4500 J / 2250 J = 2
This is because kinetic energy is proportional to mass and to the square of velocity, and since both Katia and Angela have the same velocity, their kinetic energies are proportional to their masses.
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Review the ray tracing provided.
A thin lens is located centered over a 14 cm ruler at the 7 cm mark. A black dot is located at 5.5 cm on the left side of the lens and at 8.5 cm on the right side of the lens. An arrow is located at the 6 cm mark. Rays appear to go from the head of the arrow towards the lens, and then extend backwards to the tip of an arrow located at 4 cm.
Which of the following best describes the image?
Inverted, smaller, and real
Upright, smaller, and virtual
Upright, larger, and real
Upright, larger, and virtual
The correct option is the fourth option which is the image that is described as Inverted, smaller, and real.
To determine the characteristics of the image formed by the lens, we can analyze the ray tracing provided.
The given information describes a thin lens located over a 14 cm ruler at the 7 cm mark. A black dot is placed at 5.5 cm on the left side of the lens, and another black dot is placed at 8.5 cm on the right side of the lens. An arrow is located at the 6 cm mark. The rays appear to originate from the head of the arrow, pass through the lens, and extend backward to the tip of an arrow located at 4 cm.
Based on this setup, we can draw the following conclusions:
The image is formed on the opposite side of the lens from the object, as the rays extend backward and converge at a point.The image is inverted since the rays coming from the object cross at the image point.The image is smaller than the object since the rays converge to a point closer to the lens than the object's position.The image is real since the rays actually converge at a point on the opposite side of the lens.Therefore, the best description for the image formed by the lens, based on the given information, is "Inverted, smaller, and real."
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Question #1 A cabinet initially at rest on a horizontal surface requires a 115 N horizontal force to set it in motion. If the coefficient of static friction
between the cabinet and the floor is 0.38,what is the normal force exerted on the cabinet? What is the mass of the cabinet?
Step #4 Show all your work with units.
Step # 1. Draw a free body diagram with arrows and given
and known valuer
The Normal force = 302.63 N
How to solveFriction Force = 115 N
u*Normal force= friction,
u= 0.38,
N= 115/0.38
Therefore, the Normal force = 302.63 N
Mass is a fundamental feature of matter that quantifies the amount meaningful in an object. It is typically calculated in units of kilograms (kg) or grams (g). Mass is various from weight, that depends on the gravitational force pursuing an object, while mass debris constant although gravity.
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During the 28-day lunar cycle, the positions of the Sun,
Earth, and the Moon change in relation to one another. The
diagram shows how their relative positions change.
Which statement describes the positions of the Moon, the Sun, and Earth
during a new moon?
A. Earth is closer to the Sun than to the Moon.
B. The Moon is between Earth and the Sun.
C. Earth is between the Moon and the Sun.
D. The Sun is between Earth and the Moon.
Answer: B
Explanation: B is the correct statement describing the positions of the Moon, the Sun, and the Earth during a new moon. The Moon is between Earth and the Sun.
During a new moon, the Moon is positioned between the Sun and the Earth, with the illuminated side of the Moon facing away from the Earth. This means that the side of the Moon that faces the Earth is not receiving any sunlight, making it invisible to us from Earth. The new moon is the first phase of the lunar cycle and occurs roughly every 29.5 days.
*Question*
I am a thing, when you get hold of me I will be with you while while am in my natural environment. But when you take me from my environment I will leave you after a while. What am I ?
Answer:
A breath
Explanation:
When you are in your natural environment, you naturally breathe in the air around you. But if you were to take a breath of air and hold it in your lungs, eventually you would have to exhale and the breath would leave you. Similarly, if you were to be taken out of your natural environment (such as being underwater or in space), you would not be able to breathe and would eventually die without a source of oxygen.
Question 2 of 10
What happens to the resistance of a wire as its length increases?
A. The resistance is not affected by a change in wire length.
B. The resistance decreases.
C. The resistance alternates between high and low values.
D. The resistance increases.
Answer:
D. resistance increases
Explanation:
The relationship between resistance and wire length is directly proportional, meaning the longer the wire the greater the resistance.
Answer: The resistance increases.
Explanation: A wire's resistance is directly proportional to its length. This implies that as a wire's length increases, so does its resistance. The following formula describes this relationship:
R = ρ (L/A)
where L is the wire's length, A is its cross-sectional area, R is the wire's resistance, and ρ is the wire material's resistivity.
This formula shows that the resistance will rise when the wire's length is extended while its cross-sectional area remains the same. On the other hand, if we shorten the wire, the resistance will rise. As a result, choice D is the right response.
Question 10 of 25
You place a book on top of a spring and push down, compressing the spring
by 10 cm. When you let go of the book, it is pushed up by the spring. Which
statement describes what happens to the energy of the spring-book system?
OA. The elastic potential energy of the system increases.
OB. The gravitational potential energy of the system decreases.
C. The kinetic energy of the system decreases.
OD. The total energy of the system remains constant.
SUBMIT
Answer:A
Explanation:
PLS HELP
See how a block and tackle system can increase your mechanical advantage. You will need two broomsticks, a rope, and two helpers.
A. Give each helper a broom stick and have them stand facing each other holding the broomstick firmly in both hands in a horizontal position. The broomsticks should be at the same level, about two feet apart.
B. Tie one end of the rope to one of the broomsticks. (You may need to have one of your helpers hold the knot firmly in one hand as he or she holds the broomstick to help anchor it.)
C. Wrap the rope around the other broomstick, as in a simple pulley system, and pull on the free end of the rope. Your helpers should resist your pulling. What happens? Can you pull the broomsticks together?
D. Now weave the rope back over the first broomstick, so you have a double pulley. Pull on the free end. What happens now? Can you pull the broomsticks together? What is your mechanical advantage?
E. Try weaving the rope over the broomsticks one or two more times. Describe what happens, and state the mechanical advantage of each situation.
F. Write a summary of what happened and an explanation using the terms: force, distance, work, mechanical advantage
Answer:
Explanation:
In this experiment, a block and tackle system was created using two broomsticks, a rope, and two helpers. The rope was tied to one broomstick and wrapped around the other, creating a simple pulley system. When the free end of the rope was pulled, the helpers resisted and the broomsticks did not move.
Next, the rope was woven back over the first broomstick, creating a double pulley. Pulling on the free end of the rope resulted in the broomsticks moving closer together. This demonstrated the mechanical advantage of the block and tackle system.
By adding more loops of rope over the broomsticks, the mechanical advantage was increased further. The force applied to the rope was spread out over a greater distance, resulting in less force required to move the broomsticks.
In summary, the block and tackle system increases mechanical advantage by spreading out the force applied over a greater distance. This is achieved through the use of pulleys and loops of rope, allowing a smaller force to move a larger load.
What type of wave does not need matter to carry energy?If y varies directly as x and y = 20 when x = 6, what is the value of y when x = 24?
a.
36
b.
80
c.
30
d.
4
Please select the best answer from the choices provided
A
B
C
D
Name the type of component through which current only flows in one direction.
