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pickupchik [31]
3 years ago
6

Can there be any heat transfer between two bodies that are at the same temperature but at different pressures?

Physics
1 answer:
Alenkinab [10]3 years ago
3 0

Answer:

No

Explanation:

When the two bodies at different temperatures then heat transfer takes place between two bodies. Temperature is the necessary condition for the heat transfer.

The energy can flow due to pressure difference but the heat transfer can not take place only due to pressure difference. Heat transfer needs temperature difference.

Therefore the answer will be No.

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Which of the following is an example of proper movement for a biceps curl?
DanielleElmas [232]
<span>i think the answer is : Bend the arm at the elbow with the back straight </span>
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3 years ago
Benny wonders why when he presses his finger against a map nothing happens to the map. However if he presses a thumbtack into th
anastassius [24]

Answer: The pressure exerted on a surface by an object increases as the surface area of contact decreases.

Explanation:

Pressure measures the amount of force exerted per a given area of an object. From this definition, the surface area of the object and force applied, affects the pressure applied.

As Benny presses his finger against a map, nothing happens to the map because the force applied is affected by the increased surface area of his finger. However as he presses a thumbtack into the map using the same force the tack will probably poke a hole in the map because the small( decreased) surface area of the sharp point of the thumbtack produces a much larger pressure on the map than the area of Benny finger. I hope this helps, thanks!

7 0
3 years ago
What is the force of impact of a 100 kg diver who falls into a swimming pool and hits the surface of the water and comes to a st
Simora [160]

Answer:

F = 53153.36[N]

Explanation:

In order to solve this problem, we must first use the principle of conservation of energy which is transformed from potential energy to kinetic, in this way we can determine the velocity at which the person enters the water.

E_{pot}=E_{kin}\\m*g*h=\frac{1}{2}*m*v^{2}

where:

m = mass = 100 [kg]

g = gravity acceleration = 9.81 [m/s²]

h = elevation = 9 [m]

v = velocity [m/s]

Now replacing we can determinate the velocity.

v^{2}=2*g*h\\v=\sqrt{2*g*h}\\v=\sqrt{2*9.81*9}\\v = 13.28[m/s]

Then we can calculate the momentum which can be calculated as the product of force by time, this momentum is also equal to the product of mass by velocity.

P=m*v\\and\\P =F*t\\F*t=m*v

Now replacing:

F = impact force [N]

t = time = 0.025 [s]

m = 100 [kg]

v = velocity = 13.28 [m/s]

F*0.025=100*13.28\\F=53153.36[N]

8 0
3 years ago
A 5.5 kg box is pushed across the lunch table. The acceleration of the box is 4.2 m/s2. What was the net force applied to the bo
Bezzdna [24]
Use this numbers that you are given and plug them into the formule for net force

Net force= m*a (mass times acceleration)

Therefore the net force is equal to (5.5 kg)*(4.2 m/s^2)= 23.1 N

Answer: Net force= 23.1 N
5 0
3 years ago
Read 2 more answers
A ford escort needs a force of 3500N to accelerate at the rate of 4.9 m/s2. What is the mass of the car?
Verizon [17]

Answer:

714 kg

Explanation:

ΣF = ma

3500N = 4.9m/s^2*m

m ~= 714 kg

5 0
2 years ago
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