Answer:
The final velocities of the blocks are 3.00 m/s and 8.50 m/s, respectively.
pls help asap!! due in 45 mins!!
Which of the following minerals are elements found in nature? Select one or more.
1. Gold
2. Granite
3. Oxygen
4. Silver
5. Copper
6. Zinc
7. Iron
A solid will float in a liquid if it is less dense than the liquid, and sink if it is more dense than the liquid. If the density of seawater is 1.025 g/mL, which types of plastics would definitely float in seawater? JUSTIFY your answer.
Explanation:
Plastics with a density less than or equal to 1.025 g/mL will float in seawater, while plastics with a density greater than 1.025 g/mL will sink.
Here are some examples of plastic densities:
Polyethylene terephthalate (PET) has a density of approximately 1.38 g/mL, so it will sink in seawater.
Polypropylene (PP) has a density of approximately 0.9 g/mL, so it will float in seawater.
High-density polyethylene (HDPE) has a density of approximately 0.95 g/mL, so it will float in seawater.
Polystyrene (PS) has a density of approximately 1.05 g/mL, so it will sink in seawater.
Based on the above examples, we can see that plastics such as polypropylene and high-density polyethylene will definitely float in seawater, while others such as polyethylene terephthalate and polystyrene will definitely sink. Other types of plastics with densities close to 1.025 g/mL may float or sink depending on their exact density and the conditions of the water, such as temperature and salinity.
Find the current in the given cicular loop of circuit if the given voltage is 8
The current flowing through the battery is 46.67 A.
The first step is to calculate the equivalent resistance of the circuit, which includes the resistance of the loop and the internal resistance of the battery. Since the points P and Q are connected to the battery, they are effectively in parallel, so the equivalent resistance is,
1/R = 1/40 Ω + 1/0.5 Ω = 0.025 Ω
R = 40 Ω || 0.5 Ω = 0.024 Ω
The total current flowing through the circuit is given by Ohm's law, I = V / (R + r), where V is the voltage of the battery, r is its internal resistance, and R is the resistance of the loop.
Substituting the given values,
I = 24 V / (0.024 Ω + 0.5 Ω) = 46.67 A
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--The complete question is, A circular loop has a resistance of 40Ω. Two points P and Q of the loop, which are one quarter of the circumference apart are connected to a 24V battery, having an internal resistance of 0.5Ω. What is the current flowing through the battery.--
can i get help please
Answer: Binary fission
Explanation: Bacteria cells split into two using binary fission.
a 2.6 kg rock is dropped from a height of 10 m with what speed will it strike the ground ignore air resistance
Answer:
V = sqrt(2gh)
V = sqrt(2 * 9.8 * 10)
V = sqrt (196)
V = 14 m/s
Answer:
V = sqrt(2gh)
V= sqrt(29.8 10)
V = sqrt (196)
V=14 m/s
Air passes over the top of an airplane
wing at 170 m/s, and over the bottom
at 130 m/s. What is the difference in
pressure between the top and
bottom of the wing?
Answer:
The difference in airspeed over the top and bottom of an airplane wing results in a difference in air pressure, which generates lift. The Bernoulli's equation relates the pressure of a fluid (including air) to its velocity and the height of the fluid:
P + 1/2 * rho * v^2 + rho * g * h = constant
where P is the pressure of the fluid, rho is the density of the fluid, v is the velocity of the fluid, g is the acceleration due to gravity, and h is the height of the fluid.
Assuming that the density of air is constant and the height of the wing is negligible compared to the other terms in the equation, we can simplify the equation to:
P + 1/2 * rho * v^2 = constant
The constant in the equation is the same at all points along the wing, since the air is a continuous fluid.
The pressure difference between the top and bottom of the wing can be found by calculating the pressure at the top and bottom of the wing using the simplified Bernoulli's equation, and then taking the difference between the two pressures.
Let P1 be the pressure at the bottom of the wing, where the airspeed is 130 m/s, and P2 be the pressure at the top of the wing, where the airspeed is 170 m/s. Then we have:
P1 + 1/2 * rho * (130 m/s)^2 = P2 + 1/2 * rho * (170 m/s)^2
Simplifying and rearranging, we get:
P1 - P2 = 1/2 * rho * (170 m/s)^2 - 1/2 * rho * (130 m/s)^2
Plugging in the density of air (rho = 1.225 kg/m^3), we get:
P1 - P2 = 1/2 * 1.225 kg/m^3 * (170 m/s)^2 - 1/2 * 1.225 kg/m^3 * (130 m/s)^2
Simplifying and calculating, we get:
P1 - P2 = 377.72 Pa
Therefore, the difference in pressure between the top and bottom of the wing is approximately 377.72 Pa.
if the distance between 2 troughs is 2.6 meters and a wave is traveling at a speed of 129 m/s, find the period of the wave
The period of the wave is the inverse of the frequency. The distance between the two successive crest or troughs is known as the wavelength. The period of the wave is 0.020 s.
What is period of a wave?The time taken by the particle of the medium to complete one vibration is defined as the period of the wave. The number of oscillations per second is known as the frequency. The equation used to calculate the period of a wave is:
T = 1 / f
The frequency of a wave is:
f = ν / λ
f = 129 m/s / 2.6 m
f = 49.6 Hz
Then the period of a wave is:
T = 1 / f
T = 1 / 49.6
T = 0.020 s
Thus the period of a wave is 0.020 s.
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Why do some people deny climate change, despite overwhelming evidence to the contrary?
Most typically, a person who denies the effects of climate change makes decisions based on their emotions, especially those they have toward the things they fear.
Why do some people choose to disregard climate change?The psychological distance is the first. Many people don't consider the possibility of climate change to be serious enough. Its impacts might not be immediately apparent unless you wake up to find your kitchen under water.
Why do people disregard concerns about sustainability?Depression may result from feeling constantly threatened, or it may result from our defensive system activating, forcing us to overlook the issue in order to deal. Dissonance, denial, and identification are three further difficulties cited by Stoknes.
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A car on a freeway ramp starts at a velocity of 12.0 m/s. If its average acceleration over 8 s is 3.20 m/s2, what is the velocity at the end of that interval?
A. 13.6 m/s
B. 99.2 m/s
C.25.6 m/s
D. 37.6 m/s
Answer: D. 37.6 m/s
Explanation: its D
A particle executes simple harmonic motion with an amplitude of 3. 08 cm. At what positive displacement from the midpoint of its motion does its speed equal one half of its maximum speed? Answer in units of cm
The displacement from the midpoint of the motion at which the speed is equal to half of the maximum speed is 1.85 cm.
v = Aω√(1 - (x/A)^2)
v_max = Aω
v = 1/2 v_max = 1/2 Aω
Substituting the given values, we get:
1/2 Aω = 3.08 cm * ω * √(1 - (x/A)^2)
Simplifying and squaring both sides, we get:
(1/4) A^2 ω^2 = 9.4864 cm^2 * (1 - (x/A)^2)
Solving for x/A, we get:
x/A = √(1 - (1/4)(ω^2/A^2) * 9.4864)
x/A = √(1 - (π^2/400))
x/A = 0.6
The displacement from the midpoint of the motion at which the speed is equal to half of the maximum speed is:
x = 0.6 * 3.08 cm = 1.85 cm
Harmonic motion is a type of periodic motion in which an object oscillates back and forth around an equilibrium position with a constant frequency and amplitude. It is characterized by a sinusoidal pattern, where the displacement of the object from its equilibrium position is directly proportional to the sine or cosine of the time elapsed since the motion began.
In harmonic motion, the restoring force acting on the object is proportional to its displacement from the equilibrium position, and the object's motion is governed by Hooke's Law. Examples of harmonic motion include the motion of a mass-spring system, the motion of a simple pendulum, and the vibration of a guitar string.
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What will happen to the brightness of the lamps and the current in a series series circuit if an additional app is added
Adding an additional lamp to a series circuit will increase the brightness of all the lamps in the circuit, and increase the current as well.
A series circuit comprises a path along which the whole current flows through each component. A parallel circuit comprises branches so that the current divides and only part of it flows through any branch.A circuit is said to be connected in series when the same current flows through all the components in the circuit. In such circuits, the current has only one path. Let us consider the household decorative string lights as an example of a series circuit.So, series circuits are also called Voltage dividers. For parallel circuits, it's the opposite, as voltage will flow the same in each path, the current get's dropped/separated for each path. For that very behaviour, these circuits are also called as Current dividers.
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If a 550 kg horse is traveling at 20 m/s, how much kinetic energy does it have?
Answer:
KE = 110000 J
KE = 0.11 MJ
KE = 104.1794917935 [tex]BTU_{mean}[/tex]
KE = 26252.857981585 [tex]cal_{mean}[/tex]
The kinetic energy of a moving body can be calculated using its mass and velocity. The kinetic energy of the horse of 550 kg travelling at 20 m/s is 11000 J.
What is kinetic energy ?Kinetic energy of an object is generated by virtue of its motion. When the object starts moving its potential energy starts to convert into kinetic energy.
The kinetic energy of an object is related to its mass and velocity as follows:
Ke = 1/2 mv²
Hence, kinetic energy is directly proportional to the mass and velocity.
Given mass of the horse m = 550 kg
velocity = 20 m/s
then, Ke = 1/2 550 kg × (20 m/s)²
Ke = 11000 J.
Therefore, the kinetic energy of the horse is 11000 J.
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Answer question in the picture
The kinetic energy of the roller coaster car is 40, 914. 08 J.
How to find the Kinetic energy ?The kinetic energy (KE) of a moving object is given by the formula:
KE = ( 1 / 2 ) mv ²
Where m is the mass of the object and v is its velocity.
In this case, the mass of the roller coaster car is 311.11 kg and its velocity is 16.22 m/s. Substituting these values into the formula, we get:
KE = ( 1 / 2 ) ( 311.11 kg )( 16.22 m/s) ²
KE = (0.5) (311.11 kg) ( 263. 02 m ² /s ²)
KE = 40, 914. 08 joules (J)
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Explain the relationship between angle of plane vs elliptical shape. (The angle of
the plane is represented by the blue with the resulting elliptical shape cut out).
Explanation:
The angle of the plane is directly correlated to the shape of the elliptical shape cut out. When the plane is at a low angle, the resulting elliptical shape cut out is also much shorter in length. Conversely, when the plane is at a steep angle, the resulting elliptical shape cut out is much longer in length.
This is because the angle of the plane determines the amount of material that will be removed when the plane is used to cut the elliptical shape. When the plane is at a low angle, less material is removed, thus producing a shorter elliptical shape. When the plane is at a steep angle, more material is removed, thus producing a longer elliptical shape.
In addition, the angle of the plane also affects the depth of the elliptical shape cut out. When the plane is at a low angle, the resulting elliptical shape is shallow. Conversely, when the plane is at a steep angle, the resulting elliptical shape is deep.
What is the formula for distance, time and acceleration to get to speed
The equations of motion are:
[tex]v=u+at\\v^2=u^2+2as\\s=ut+\frac{1}{2}at^2[/tex]
Hence, the formula for distance (or displacement (s) ), time (t), and acceleration (a) to get to speed (u), is:
[tex]s = ut+\frac{1}{2} at^2[/tex]
A certain material has a critical angle of 52.0 degrees. What is its index of refraction?
A given substance's index of refraction will be ni 1.27 if its critical angle is 52.0. The critical angle refers to the point of contact that determines that the refraction angle is 90 degrees in optics.
Refractive index is characterized by the variance between the speed of a light beam in atmosphere and the provided medium. As a result, it is possible to determine how the angle of inclination and index of refraction are related because they are inversely proportional.
Angle of Criticality and Refractive Index
Mathematics may be used to express the following relationship among critical angle & refractive indices:
[tex]sin C =[/tex] μ [tex]\frac{1}{ \\\frac{a}{b} }[/tex]
Where,
The crucial angle is called C.
The medium's refractive index is represented by μ .
Two media for light waves are represented by letters a and b.
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A force is applied to a 1 kg mass and produces
4.1 m/s
2
acceleration.
What acceleration would be produced by
the same force applied to a 13.4 kg mass?
Answer in units of m/s
2
.
The 2.4 m/s² acceleration would be produced by the same force applied to a 13.4 kg mass.
What is acceleration ?
The pace at which speed changes is known as acceleration. Acceleration typically, but not always, indicates a change in speed. Because the direction of an object's velocity is shifting even while it follows a circular course, it continues to accelerate.
What is force?
A body can change its state of rest or motion when an external force acts on it. It is directed and has a magnitude.
As we know that force= mass × acceleration
So F₁=m₁×4
F₂=m₂×6
now for combined system total acceleration will be "a"= F/ m₁+m₂
m₁= F/4
m₂= F/6
so put the value of m₁ and m₂
Therefore, 2.4 m/s² acceleration would be produced by the same force applied to a 13.4 kg mass.
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If a 50g object is moving initially with 40m/s, after 2 min. it covered 670 m with 90 m/s.
a- Calculate the force applied causing it to speed up.
b- Calculate the work done by this force.
c- If the coefficient of friction for the ground is 0.34, What is the work done by friction?
d- What is the net work done?
Answer:
a) We can use the following formula to calculate the acceleration of the object:
a = (v_f - v_i) / t
where a is the acceleration, v_f is the final velocity, v_i is the initial velocity, and t is the time interval. Substituting the given values, we get:
a = (90 m/s - 40 m/s) / (2 min * 60 s/min) = 0.83 m/s^2
The force applied causing it to speed up can be found using Newton's second law of motion:
F = m * a
where F is the net force, m is the mass of the object, and a is the acceleration. Substituting the given values, we get:
F = 0.05 kg * 0.83 m/s^2 = 0.042 N
Therefore, the force applied causing the object to speed up is 0.042 N.
b) The work done by this force can be calculated using the following formula:
W = F * d
where W is the work done, F is the net force, and d is the displacement of the object. The displacement of the object is given by:
d = 670 m
Substituting the given values, we get:
W = 0.042 N * 670 m = 28.14 J
Therefore, the work done by the force is 28.14 J.
c) The work done by friction can be calculated using the formula:
W_friction = F_friction * d
where W_friction is the work done by friction, F_friction is the force of friction, and d is the displacement of the object. The force of friction can be calculated using:
F_friction = μ * F_norm
where μ is the coefficient of friction and F_norm is the normal force. The normal force is equal to the weight of the object, which is given by:
F_weight = m * g
where m is the mass of the object and g is the acceleration due to gravity. Substituting the given values, we get:
F_weight = 0.05 kg * 9.81 m/s^2 = 0.49 N
The normal force is equal in magnitude to the weight of the object, so we have:
F_norm = F_weight = 0.49 N
Substituting the given coefficient of friction, we get:
F_friction = 0.34 * 0.49 N = 0.17 N
The work done by friction can now be calculated by substituting the values we have found:
W_friction = 0.17 N * 670 m = 113.9 J
Therefore, the work done by friction is 113.9 J.
d) The net work done can be calculated as the sum of the work done by the applied force and the work done by friction:
W_net = W_applied + W_friction
Substituting the values we have found, we get:
W_net = 28.14 J + 113.9 J = 142.0 J
Therefore, the net work done is 142.0 J.
The two elements will bond or not bond into one ratio
Ionic compounds can be created when elements from Groups 1 and 17 mix one to one ratio.
To create ionic compounds, group 1 and group 17 elements can combine one to one.
In addition, group 8A (or VIIIA) of the periodic table contains the noble gases or inert gases helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and radon. As a result, if any elements from this group are present, they will not bond (Rn).
The name of these elements refers to how little they react with other elements or compounds. An example of bonding is, when carbon and oxygen atoms join in a 1:2 ratio, carbon dioxide is produced; when they combine in a 1:1 ratio, carbon monoxide, or CO, is produced.
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A flat coil of wire is placed in a uniform magnetic field that is in the y direction. (i) The magnetic flux through the coil is a maximum if the plane of the coil is where? (Select all that apply. ) in the xy plane in the yz plane in the xz plane in any orientation, because it is a constant (ii) For what orientation is the flux zero? (Select all that apply. ) in the xy plane in the yz plane in the xz plane in any orientation, because it is a constant
Due to theta's value of 90, flux in the x, y, and z planes will actually be zero. As long as the loop stays within the xz plane, which is parallel to the y axis that provides the most area again for passage of a magnetic field,
Flow = BA cos(theta) It will be at its highest if theta is zero and zero is ninety degrees.
The largest region for a magnetic field to flow through during a loop is situated in the xz plane, where theta is 90, is where flux will be zero in the xy plane and the yz plane.
Flow = BA cos(theta) It will be at its highest if theta is zero and zero is ninety degrees. In this situation, theta is 90, hence flux will indeed be 0 in the x, y, and z planes.
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Can someone help please
Mars's moon Phobos is only about 12 km wide. Your weight on Phobos would be
0.001 what it is on Earth. Its escape velocity is 12 m/s. This velocity results in enough
kinetic energy to produce zero PE at infinite distance. You could launch yourself into
orbit around Phobos with a strong, very fast jump. Compare this jumping speed to
escape velocity, and describe what would happen if you jumped at an angle.
If you jumped at an angle, it would depend on the angle you jumped at and the speed you jumped at. If you jumped at an angle that was greater than the escape velocity of 12 m/s, you would be able to escape.
What is angle ?An angle is a figure formed by two rays, or line segments, that extend from a common endpoint. It is a measure of the amount of turn between the two rays. The angle is measured in degrees, with a full circle being 360 degrees. Angles can be acute, obtuse, right, reflex, or straight. Acute angles measure less than 90 degrees, whereas obtuse angles measure more than 90 degrees. Right angles measure exactly 90 degrees, reflex angles are greater than 180 degrees, and straight angles measure exactly 180 degrees.
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Newton's ______ law of motion is also known as action/reaction.
two people are being pulled up out of the water by a helicopter the helicopter pulls the two people upwards who weigh a combined 150 kg and lifts them 20 meters. determine the work done by the helicopter
The helicopter generates 29,400 Joule of work. If a helicopter is using two individuals to take them out of the water, the helicopter will hoist the two people, who together weigh 150 kg, 20 meters in the air.
Definition of Completed Work.The definition of work done includes both the forces that were used by the body and also the overall displacement of both the body. A constant total Force is present before to this block. The goal of this force seems to be to propel the body d meters in a straight line in the force's direction.
How is work completed?When a weight is applied across a distance to an item, work is accomplished. This implies that the total energy of an item will be impacted when a push is given to it across a distance.
Work = Force x Distance
= 150 kg x [tex]9.8 m/s^{2}[/tex] x 20 m
= 29,400 J
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A 3 kg fish is swimming at 1.5 m/s to the right. It swallows a 0.25kg
fish swimming to the left at 4.0 m/s. What is the velocity of the larger
immediately after lunch?
Show Your Work
Answer:
1.076 m/s
Explanation:
Given a 3.0 kg fish is swimming at 1.5 m/s to the right. it swallows a 0.25 kg fish swimming to the left at 4.0 m/s. what is the speed and direction of the larger fish immediately after lunch?
Mass of fish m1 = 3 kg
Velocity v1 = 1.5 m/s
Mass of small fish m2 = 0.25 kg
Velocity v2 = - 4 m/s (negative sign since the direction is opposite)
Therefore total mass of fish after swallowing will be M = 3 + 0.25 = 3.25 kg
Let the final velocity of fish be V
Now according to the law of conservation of momentum we have
So m1v1 + m2v2 = M x V
3 x 1.5 + 0.25 x – 4 = 3.25 x V
4.5 – 1 = 3.25 V
3.25 V = 3.5
Or V = 1.076 m/s
So speed of the fish will be 1.076 m/s
Consider the circuit
The current in the 5.0 Ohm resistor is:
The voltage across each resistors connected in parallel circuit is the same. Hence, according to Ohm's law, the current through the resistor of 5 ohms is 1.5 A.
What is Ohm's law ?Ohm's law states that, the voltage across a circuit is the product of the resistance through and current flowing through the circuit.
V = I R.
The voltage over resistors connected in series circuit will be different whereas , that for a parallel circuit, voltage is constant.
Given v = 12 V
then, the current through the series circuit is the same for all the components in the circuit.
hence, the total resistance in the branch with 3 ohm and 5 ohms is:
R = R1 + R2 = 5. + 3 = 8 Ω
Now, the current passing through the branch will be 12 V/ 8 Ω = 1.5 A.
Therefore, the current passing through the 5 ohm resistor is 1.5 A.
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A train is moving to the right. The force of air resistance and the surface friction from the tracks totals 259,800 N . In order for the train to keep moving at a constant velocity, how much forward force is the engine providing?
The engine is providing a forward force of 259,800 N to keep the train moving at a constant velocity.
What is forward force?
Forward force is the force applied in the direction of motion, which causes an object to move or maintain a constant velocity.
Constant velocity refers to the motion of an object moving in a straight line at a steady speed, without changing its direction. The velocity of the object is constant when its speed and direction remain unchanged over time, regardless of whether the object is moving or stationary.
Since the train is moving at a constant velocity, the net force acting on the train is zero. Therefore, the forward force provided by the engine must be equal in magnitude and opposite in direction to the force of air resistance and surface friction.
So, the magnitude of the forward force provided by the engine is:
Magnitude of forward force = Magnitude of force of air resistance and surface friction
Magnitude of forward force = 259,800 N
Therefore, the engine is providing a forward force of 259,800 N to keep the train moving at a constant velocity.
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How does a heater in one corner of a fish aquarium warm the whole aquarium? (1 point)
O The heater warms the glass of the aquarium, which warms the water.
O The heater creates convection currents, which transfer warmer water away from the heater and cooler water toward the heater.
O The heater warms the air above the aquarium, which warms the water.
O The heater adds thermal energy evenly to the aquarium's water.
Answer:
The heater creates convection currents, which transfer warmer water away from the heater and cooler water toward the heater.
Explanation:
When a heater is placed in one corner of a fish aquarium, it heats up the water around it. As the water around the heater gets warmer, it becomes less dense and rises to the top of the aquarium. This movement of warmer water creates a convection current, which transfers the warmer water away from the heater and towards the other areas of the aquarium.
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On a transformer with a turn ratio of 72:1, if the power on the primary side is 2 MW, what
is the power on the secondary side?
answer choices:
36 W
2 MW
27.8 MW
36 MW
Answer:
Explanation:
The power on the primary side of a transformer is equal to the power on the secondary side, neglecting losses. This is because power is conserved in a transformer.
Therefore, if the power on the primary side is 2 MW, then the power on the secondary side will also be 2 MW.
So, the correct answer is: 2 MW.
In which type of relationship do both organisms benefit?
Answer: I think the answer is symbiotic tell me if I am right
Explanation:
Answer:
Symbiotic
Explanation:
Pathogenic relationships refer to things like microbes or viruses, think along the lines of how diseases spread throughout the body. One party is benefitted but the other is not.
'Microorganism' and 'macroorganism' refer to types of organisms rather than types of relationships.
