Question 38 (1 point)
A 1500kg car originally moving at 10m/s crashes into a wall and comes to rest in 0.25s, what is the magnitude of the impulse given to the car?

Question 38 options:

60000 kg m/s

150 kg m/s

15000 kg m/s

37.5 kg m/s

Question 39 (1 point)
A 50.0 g golf ball is struck by a driver whose head has a mass of 500.0 kg. The final speed of the golf ball after leaving the tee is 45.0 m/s. Find the final momentum of the golf ball.

Question 39 options:

7.5 kg·m/s

10.0 kg·m/s

2.5 kg·m/s

5.0 kg·m/s

Question 40 (1 point)
H2(g) + F2(g) → 2 HF(g) ΔH=-546 kJ

According to the Law of Conservation of Energy, what does this equation tell us about the change in energy?

Question 40 options:

More energy was released in the formation of the 2 HF bonds than in the breaking of the bonds of H2 and F2.

It took 546 kJ of energy to form HF.

546 kJ of energy were added to the system in order for the reaction to proceed.

More energy was required to break the bonds of H2 and F2 than was released in the formation of 2 HF bonds.

The refraction of light is commonly a topic of study in physics and physical science courses. However, humans encounter this phenomenon more often than they realize. For example, warning signs around a community pool warn of deep waters near the deep end of 6 feet. In what manner is light refraction playing a role at the community pool?

Question 46 options:

The water in the deep end appears shallower than it really is because light traveling from the bottom bends when it reaches the surface.

Light bouncing from the water surface back to the eyes of a pool user may cause a momentary blindness if the light is too intense.

Light interacting with the chlorine in the water can cause the water to appear discolored, making it difficult to judge the depth of the water.

Light bending around the ripples in the pool distort the clarity of the water, making it less safe for users.

Question 48 (1 point)
When tuning a guitar, a musician plays two strings at once. These sound waves overlap and often appear to get louder and softer if the strings are not in tune. This interaction of overlapping waves is called

Question 48 options:

refraction

reflection

interference

diffraction

Question 49 (1 point)
Which is the BEST definition of refraction?

Question 49 options:

Light or sound waves increase their rate of dispersion.

Light or sound waves change direction.

Light or sound waves bounce off a medium.

Light or sound waves move from one area to another.

Question 50 (1 point)
You are holding a plane mirror 1 meter in front of your eyes and are able to see a 15 meter tall tree behind you. The image completely fills your 25 cm tall mirror. How far away from the tree are you standing?

Question 50 options:

25 meters

15 meters

30 meters

60 meters

Question 53 (1 point)
A converging lens can produce both real and virtual images depending on the position of the object. Explain when converging lenses can produce virtual images and describe the image produced.

Question 53 options:

A virtual image is produced if the object is between the focal point and the lens, the image will be upright, enlarged and on the same side of the lens as the object.

A virtual image is produced if the object is between the focal point and the lens, the image will be upright, reduced and on the opposite side of the lens from the object.

A virtual image is produced if the object is on the focal point, the image is upright, enlarged and on the same side of the lens as the object.

A virtual image is produced if the object is on the focal point, the image is inverted, enlarged and on the opposite side of the lens from the object.

Question 54 (1 point)
Index
Air 1.001
Water 1.33
Pyrex 1.47
Crown Glass 1.52
Rock Salt 1.54
Ruby 1.71
Diamond 2.42

Ray Bender observes that light striking a sheet of material at a 30 degree angle to the surface, is bent to an angle of 36 degrees relative to the normal as it passes through the material. Through what material is the light passing?

Question 54 options:

Crown Glass

Water

Ruby

Pryex

Question

espinomarco964 espinomarco964

09-05-2024
Physics

Answered

Question 38 (1 point)
A 1500kg car originally moving at 10m/s crashes into a wall and comes to rest in 0.25s, what is the magnitude of the impulse given to the car?

Question 38 options:

60000 kg m/s

150 kg m/s

15000 kg m/s

37.5 kg m/s

Question 39 (1 point)
A 50.0 g golf ball is struck by a driver whose head has a mass of 500.0 kg. The final speed of the golf ball after leaving the tee is 45.0 m/s. Find the final momentum of the golf ball.

Question 39 options:

7.5 kg·m/s

10.0 kg·m/s

2.5 kg·m/s

5.0 kg·m/s

Question 40 (1 point)
H2(g) + F2(g) → 2 HF(g) ΔH=-546 kJ

According to the Law of Conservation of Energy, what does this equation tell us about the change in energy?

Question 40 options:

More energy was released in the formation of the 2 HF bonds than in the breaking of the bonds of H2 and F2.

It took 546 kJ of energy to form HF.

546 kJ of energy were added to the system in order for the reaction to proceed.

More energy was required to break the bonds of H2 and F2 than was released in the formation of 2 HF bonds.

The refraction of light is commonly a topic of study in physics and physical science courses. However, humans encounter this phenomenon more often than they realize. For example, warning signs around a community pool warn of deep waters near the deep end of 6 feet. In what manner is light refraction playing a role at the community pool?

Question 46 options:

The water in the deep end appears shallower than it really is because light traveling from the bottom bends when it reaches the surface.

Light bouncing from the water surface back to the eyes of a pool user may cause a momentary blindness if the light is too intense.

Light interacting with the chlorine in the water can cause the water to appear discolored, making it difficult to judge the depth of the water.

Light bending around the ripples in the pool distort the clarity of the water, making it less safe for users.

Question 48 (1 point)
When tuning a guitar, a musician plays two strings at once. These sound waves overlap and often appear to get louder and softer if the strings are not in tune. This interaction of overlapping waves is called

Question 48 options:

refraction

reflection

interference

diffraction

Question 49 (1 point)
Which is the BEST definition of refraction?

Question 49 options:

Light or sound waves increase their rate of dispersion.

Light or sound waves change direction.

Light or sound waves bounce off a medium.

Light or sound waves move from one area to another.

Question 50 (1 point)
You are holding a plane mirror 1 meter in front of your eyes and are able to see a 15 meter tall tree behind you. The image completely fills your 25 cm tall mirror. How far away from the tree are you standing?

Question 50 options:

25 meters

15 meters

30 meters

60 meters

Question 53 (1 point)
A converging lens can produce both real and virtual images depending on the position of the object. Explain when converging lenses can produce virtual images and describe the image produced.

Question 53 options:

A virtual image is produced if the object is between the focal point and the lens, the image will be upright, enlarged and on the same side of the lens as the object.

A virtual image is produced if the object is between the focal point and the lens, the image will be upright, reduced and on the opposite side of the lens from the object.

A virtual image is produced if the object is on the focal point, the image is upright, enlarged and on the same side of the lens as the object.

A virtual image is produced if the object is on the focal point, the image is inverted, enlarged and on the opposite side of the lens from the object.

Question 54 (1 point)
Index
Air 1.001
Water 1.33
Pyrex 1.47
Crown Glass 1.52
Rock Salt 1.54
Ruby 1.71
Diamond 2.42

Ray Bender observes that light striking a sheet of material at a 30 degree angle to the surface, is bent to an angle of 36 degrees relative to the normal as it passes through the material. Through what material is the light passing?

Question 54 options:

Crown Glass

Water

Ruby

Pryex

Answer :

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