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Okay so I have a few questions:

1. An individual has a weight of 735 Newton’s. What is the individual’s mass? Show the appropriate equation and show your work

2. A temperature of a 50kg block increases by 15 degrees Celsius when 337,500 J of thermal energy are added to the block. What is the specific heat of the object? Show your work
(What is the block made of?) (is this block a good material for insulators or conductors)

3. Describe how the velocity and acceleration of a skydiver changes as she falls from the plane back to the ground.

Respuesta :

lucaislitt
  1. 735÷9.8= 75 kg The total amount of newton's is 736 now you divide that by the number of Newton's in a kg which is 9.8 so the person weighs 75 kg.
  2. I don't know this one, sorry.
  3. The velocity and acceleration is very fast first because of gravity but it gets slower due to air resistance.

1.

Answer:

m = 74.9 kg

Explanation:

As we know that weight of the object is force due to gravity

Now we know that

[tex]F_g = mg[/tex]

[tex]m = \frac{F_g}{g}[/tex]

[tex]m = \frac{735}{9.81}[/tex]

[tex]m = 74.9 kg[/tex]

2.

Answer:

[tex]s = 450 J/kg ^oC[/tex]

Explanation:

Heat added to the system is given as

[tex]Q = ms\Delta T[/tex]

so we will have

[tex]337500 = 50 s (15)[/tex]

[tex]s = 450 J/kg ^oC[/tex]

3.

Answer:

Velocity will increase while acceleration will remain constant

Explanation:

When skydiver falls from rest then velocity will increase with time while the acceleration due to gravity will remains constant.

So here we can say that

[tex]a = 9.81 m/s^2[/tex]

while velocity will increase while it falls from certain height

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