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GaryK [48]
4 years ago
11

Four students are carrying out different laboratory procedures.

Physics
2 answers:
Firlakuza [10]3 years ago
7 0

Answer: Option (b) is the correct answer.

Explanation:

Convection is defined as a process in which a fluid is heated an hotter material (less dense) rises at the top whereas cooler material (more dense) sinks at the bottom. This movement of material causes transfer of heat between the materials.

For example, when Jason is heating salt water over a burner until the water evaporates.

Thus, we can conclude that Jason’s experiment relies on convection.

leva [86]3 years ago
3 0

B. Jason's experiment

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4 0
3 years ago
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nikdorinn [45]

Answer

given,                            

mass of the piano = 170 kg              

angle of the inclination = 20°                

moves with constant velocity hence acceleration = 0 m/s²    

neglecting friction                                  

so, force required to pull the piano                    

F = m g sin θ                                                      

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F = 570.39 N                                                    

so, force required by the man to push the piano is F = 570.39 N

4 0
3 years ago
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