if a free falling rock were equipped with a speedometer, by how much would it's speed readings increase with each second IF it were on a planet where g= 20 m/s^2? would it be 60?

Answers

Answer 1

Answer: accelleration(a) is changing of velocity in second.
free fall a = g
speed increase = a = g = 20 (m/s) / s

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the four forces shown have the same strength. which force would be most effective in opening the door?

Answers

if the same forces are applied, then the door will not move due to similar strength. So, regardless the door won't move.

What are the types of force ?

Force is a parameter which can be defined as either pushing or pulling of the object resulting in the object’s interaction or movement, without force the objects can not move, be stopped or change the direction.

Force is a quantitative interacting parameter between two physical bodies, means an object and its environment, there are different types of forces in nature.

If an object is in its moving state then it will be either static or motion, the position of the object will only be changed if it is externally pushed or pulled.

The contact type of force are the force that occurs when we apply some effort on an object such as Spring Force, Applied Force, Air Resistance Force, Normal Force, Tension Force, Frictional Force

Non-Contact type of forces are another type of forces occur from a distance such as Electromagnetic Force, Gravitational Force, Nuclear Force

For more details Force, visit

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Hey There! According to science, if the same forces are applied, than the door will not move due to similar strength. So, regardless the door won't move. Have A Brainly Day!

A central air-conditioner uses 3500W of electricity. If electricity costs $0.087/kW*h. calculate how much it would cost to operate the air-conditioner 24 hours a day for 4 months (120 days).

Answers

Answer:

$876.96

Explanation:

The energy used is:

3500 W × (24 hr/day) × (120 day) × (1 kW / 1000 W) = 10,080 kWh.

So the cost is:

10,080 kWh × ($0.087 / kWh) = $876.96

Find the force, in N that does 0.0284 kilojoules of work in moving a book a distance of 4.00 meters

Answers

Work equals force timesdistance. When you move an object, you are exerting a force onto it. Byexerting a force on the object, you are actually displacing it from its initialposition. You cannot apply force to the object without altering its position. Keepin mind that when you exert work, you are exerting energy too. Note that 1kilojoule = 1000 joules and joules is equal to Newton meter. So,

W = F*d
F = W/d
F = (0.0284 kJ)(1000J/1kJ)(1N-m/1J)/4m
F = 7.1 N

You are running late to meet a friend at the movies. She calls to ask where you are. What would you be describing if you told her you were 20 meters away from the movie theatre at that moment?A. your length
B. your vector
C. your position
D. your displacement

Answers

The correct answer is actually C. your position

JUST TOOK THE QUIZ AND GOT IT CORRECT

you would be describing your length

A bird can fly 30km/hr. How many hours does it take to fly 22,000 m?

Answers

It would take a bird .73 repeating hours.

The answer is (22/30) because 22000 m becomes 22 km.

What could you do to change the volume of a gas?

Answers

People are going to tell you about heating or cooling the gas, but
there's only one way to change the volume of a gas: Put it into a
different container !

A gas always expands to fill whatever you keep it in ... doesn't matter
how warm or cold it is. So the only way to make it change its volume
is to put it into a larger or smaller jar.

Heat it up to make it expand, or cool it down to make it contract. When you heat a gas, the particles of the gas get farther apart, therefore making the gas expand. The opposite happens when you make it colder.

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