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3 years ago

In freefall, heavier objects fall with a greater acceleration than lighter objects.

Physics

2 answers:

Rom4ik [11]3 years ago

6 0

Answer:

That is not true all objects fall at the same speed excepts things like feathers or paper.

8090 [49]3 years ago

5 0

Answer: false

Explanation: apex

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The box in the above picture is falling from the top of a building to the ground. Two major forces are acting on the box as it f

Galina-37 [17]

Answer:  Q= Air resistance

Description: 

The box release two forces acts on it, when it is falling from the building.

1. Its weight, 2. Air resistance

As this point its weight is much greater due to the force of gravity on the objects, so it accelerates downwards.
As its speed increases so does the drag on the object so its acceleration starts slow down until it reaches to zero. At which point air resistance will be equal to weight of the object leaving a resultant force of zero.

4 0

3 years ago

Read 2 more answers

At 10:30 AM, detectives discover a dead body in a room and measure its temperature at 27°C. One hour later, the body's temperatu

wolverine [178]

Answer:

The time of death was approximately 4 hours before 10:30 AM.

Explanation:

Temperature of the body when discovered by detective at 10:30 AM= 27°C

After discovery, Temperature of the body at 11.30 AM= 24.8°C

Change in time = ΔT = 1 hour

Rate of change of body temperature with respect to time :

$R=\frac{24.8^oC-27^oC}{1 hour}=-2.2^oC/hour$

Normal body temperature = 37°C

Change in time since death = ΔT'

$R=\frac{27^oC-37^oC}{\Delta T'}$

$-2.2^oC/hour=\frac{27^oC-37^oC}{\Delta T'}$

$\Delta T'=\frac{27^oC-37^oC}{-2.2^oC/Hour}=4.54 hour\approx 4 hours$

The time of death was approximately 4 hours before 10:30 AM.

4 0

4 years ago

Convection occurs when thermal energy is transferred by the movement of what

Soloha48 [4]

Explanation:

You may know that electricity flows through wires. Wires are good conductors of electricity. Heat too can be transferred, or conducted, through some types of materials. The term conduction refers to the transfer of energy. Conduction occurs when energy is passed between objects.

The transfer of thermal energy is called heat. Particles of matter are in constant motion. Sometimes they collide with other particles. When they do, they transfer some of their energy. The energy is transferred from particle to particle. It is sort of like a row of dominoes falling over. In this process, thermal energy moves through a substance. It can even move into other nearby substances conduction occurs between particles of the metal in the pot. It also occurs between particles of the pot and the water. Figure below shows additional examples of conduction. Did you ever cook over a campfire? The man in Figure below is cooking his lunch. He waits as his food absorbs energy. First, the energy from the fire needs to heat the water. Soon, all the water in the pot will be boiling hot. The man also feels warm. He feels the heat from the flames. He feels the warmth even though he is not touching the flames. Thermal energy is transferred from the fire to his hands.

7 0

3 years ago

Calculate the amount of gravitational potential energy at the top of each hill

Marizza181 [45]

The gravitational potential energy has the formula:
PE = mgh
where PE is in joules
m is the mass of the object in kg
g is the acceleration due to gravity
h is the height in m

since you did not give the value of h, i cannot fully answer your quesstion.
PE = (58/1000 kg) (9.81m/s2) h
PE = 0.57h
just substitute the value of h in the equation

5 0

4 years ago

How do bubbles form in water

Katen [24]

Answer:

I'm pretty sure it has something to do with air

Explanation:

4 0

3 years ago