Which of the following is a true statement about objects in a vacuum?A. A feather will fall faster than a bowling ball.
B. A feather will fall slower than a bowling ball.
C. A feather and a bowling ball will fall at the same rate.
D. Both a feather and a bowling ball can't fall, but will always remain motionless.

Answers

Answer 1

Answer: C. A feather and a bowling ball will fall at the same rate. This is because there is no wind resistance and gravity pulls equally on both objects.

Answer 2

Answer: C. A feather and a bowling ball will fall at the same rate.

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How much work is done in the vertical direction if 125 N of force is needed to hold an object at shoulder height as a person walks 2 m forward

Answers

Work is the product of force multiplied by the distance moved, but since the distance moved in the vertical direction is zero

Work Done = 0 joules

Given data

Force = 125N

Horizontal Distance = 2 m

Vertical distance = 0 m

Formula for work

Work = Force * Distance

Solution

substitute the given information

Work Done in the horizontal direction= 125*2

Work Done = 250 Joules

Learn more about work here:

brainly.com/question/8119756

At height h above the surface of Earth, the gravitational acceleration is What is h? Note: The radius of Earth is 6380 km.

Answers

The acceleration of gravity is inversely proportional to
the square of the distance from Earth's center.

The acceleration of gravity is 9.8 m/s² on the Earth's surface ...
6380 km from the center.

If the acceleration of gravity at 'h' is 4.9 m/s² ... 1/2 of what it is
on the surface, then the distance from the center is

(6380 x √2) = 9,023 km (rounded) ,

and 'h' is the distance above the surface

= (9,023 - 6,380) = 2,643 km (rounded) .

What do we call the minimum energy that is required by an electron to leave the metal target in the photoelectric effect?Select one of the options below as your answer: A. energy function B. minimum function C. work function D. quanta E. electrical energy

Answers

Answer:

C. work function

Explanation:

In the photoelectric effect, the energy of the incident photon is used in part to extract the electron from the metal (and this energy is called work function) and the rest is converted into kinetic energy of the electron. In formula:

$hf = \phi +K$

where

hf is the energy of the incident photon, which is the product between h (the Planck constant) and f (the photon's frequency)

$\phi$ is the work function

K is the kinetic energy of the photoelectron as it leaves the material

The work function is what we call the minimum energy that is required by an electron to leave the metal target in the photoelectric effect.

Entropy measuresa.
temperature as volume increases.
b.
temperature as pressure increases.
c.
temperature at constant pressure.
d.
messiness.
e.
temperature at constant volume.

Answers

entropy measures : D. Messiness

Entropy often interpreted as the degree of disorder or randomness in the system thermal energy for conversion into mechanical work, so the best way to describe it is it measures 'messiness'

Which air pressure reading is likely an indicator of clear weather?a. 900 mb
b. 950 mb
c. 1000 mb
d. 1050 mb

Answers

1050 mb of air pressure is likely an indicator of clear weather. The correct option among all the options given in the question is option "d". In reality, higher pressure is mostly associated with clear and good weather while stormy or bad weather is often associated with low air pressure.

Calculate how long it takes for a stone falling from a bridge with an average acceleration downward of 9.8m/s^2 to hit the water. The stone starts from rest and hits the water with a velocity of 12.3m/s.

Answers

If the stone begins from rest and ends with a downward speed
of 12.3 m/s, then it must have spent

(12.3) / (9.8) = 1.26 seconds
falling.

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