If a cotton ball is dropped from 12 meters with air resistance, what will be the velocity and acceleration at t = 1.00 s?

Answers

Answer 1

Answer: All we can say is that they will be less than 9.8 m/s and 9.8 m/s^2. The exact numbers will depend on the cotton ball's weight, volume, density, shape, and surface roughness, and I would guess that no two cotton balls will produce the same numbers.

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A company is creating a new cylindrical container to replace its original cylindrical container.´ The new container will have 4 times the volume of the original container.

´ The height of the new container will remain the same as the height of the original container.

The length of the radius of the new container will be -

f 4 times the length of the radius of the original container
g 8 times the length of the radius of the original container
h 2 times the length of the radius of the original container
j 16 times the length of the radius of the original container

Answers

The correct option is h. " 2 times the length of the radius of the original container"

Reason:
V(old) = pi r^2 h ... r = old radius
V(new) = 4pi r^2 h = pi R^2 h R = new radius
4pi r^2 h = pi R^2 h ... pi and h cancel
4r^2 = R^2
R = 2r

Your physics teacher is giving you a special gift a box of mass 20 kg with a mystery surpise insie .the box is placed on a frictionsed table .what is the weigth of the box and normal reaction over it by the table ?

Answers

Answer:

F = 196.2 N

Explanation:

Use Newtons law

F = m * a

F = 20 kg * 9.81 m/s²

F = 196.2 N

Answer:

$\Huge \boxed{\mathrm{196.2 \ N}}$

$\rule[225]{225}{2}$

Explanation:

Using weight formula:

$\sf Weight = mass * acceleration \ of \ gravity$

$W=mg$

The mass of the box is 20 kg.

The acceleration of gravity on Earth is 9.81 m/s².

$W=(20)(9.81)$

$W=196.2$

The weight of the box is 196.2 N.

The net force of the box is zero, since the box is at rest. The normal force is exerted upward on it by the table.

$\rule[225]{225}{2}$

What is the kinetic energy of a baseball moving at a speed of 40 m/s if the baseball has a mass of 0.15kg

Answers

Answer:

120

Explanation:

KE = (mv^2)/2

= ((0.15)(40)^2)/2

= ((0.15)(1600))/2

= 240/2

According to Newton's Third Law of Motion, what happens when two objects of unequal masses collide? A.
The object with the larger mass will have greater damage.

B.
The object with the smaller mass will continue forward due to inertia.

C.
They will push away from each other in proportion to their masses.

D.
They will both make a sudden stop.

Answers

Newton's third law is that for every action, there is an equal and opposite reaction.
A Damage is not a part of physics, at least I don't think it is.
B Is just downright wrong. If anything, the smaller mass will be pushed forward with the heavier mass.
C Sounds correct
D It's wrong, because the masses are not equal, or else they would stop.

Which of the following does a weather station model demonstrate?A) altitude
B) air mass
C) air density
D) temperature

Answers

D
A weather station model depicts many weather elements such as wind speed and direction, cloud type, cloud cover, temperature, dew point and others. However, options A, B, and C are not depicted.

d, temperature

its the right answer on the test !! :D

Solid Gas Liquid Fastest Speed drag and drop answer here Medium Speed drag and drop answer here Slowest Speed drag and drop answer here

Answers

Answer:

Gas has the fastest moving particles. Liquid has the second fastest. Solid's particles cannot move.

Explanation:

Gas's molecules are spread apart and have space to move. Liquids have loosely held molecules. Solid's molecules don't move because they are tighly packed.

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When the mass of an object increases, the force of gravityincreases. decreases. remains the same. becomes irregular.