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ikadub [295]
3 years ago
14

Heat gained or lost is mass times specific heat times change in temperature.

Physics
2 answers:
777dan777 [17]3 years ago
7 0

its A  i just had it on USATestPrep

BlackZzzverrR [31]3 years ago
6 0

the answer would be B

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A 65-kg ice skater stands facing a wall with his arms bent and then pushes away from the wall by straightening his arms. At the
Marrrta [24]

Our values can be defined like this,

m = 65kg

v = 3.5m / s

d = 0.55m

The problem can be solved for part A, through the Work Theorem that says the following,

W = \Delta KE

Where

KE = Kinetic energy,

Given things like that and replacing we have that the work is given by

W = Fd

and kinetic energy by

\frac {1} {2} mv ^ 2

So,

Fd = \frac {1} {2} m ^ 2

Clearing F,

F = \frac {mv ^ 2} {2d}

Replacing the values

F = \frac {(65) (3.5)} {2 * 0.55}

F = 723.9N

B) The work done by the wall is zero since there was no displacement of the wall, that is d = 0.

6 0
2 years ago
Which free body diagram is in equilibrium?
bearhunter [10]

A. because everything is balanced.

6 0
2 years ago
After a collision between two different massed objects; the larger objects accelerate at a faster rate than the smaller object?
Nitella [24]

Answer: Things continue doing what they are doing unless a force is applied to it. Objects have a natural tendency to resist change. This is INERTIA. Heavier objects (objects with more mass) are more difficult to move and stop. Heavier objects (greater mass) resist change more than lighter objects, so true

Explanation:

Pushing a bicycle or a Cadillac, or stopping them once moving. The more massive the object (more inertia) the harder it is to start or stop. The Cadillac has more of a tendency to stay stationary (or continue moving), and resist a change in motion than a bicycle.

6 0
2 years ago
An inclined plane is 5.00 m long and 3.00 m high. What is the ideal mechanical advantage of this machine?
Dvinal [7]
 <span>inclined plane formula is length/hight 

so 5/2= 2.5 

and work= f x d so  
work= 5 x 104 x 10= 5200 W 
</span>
4 0
3 years ago
Waves transfer what?<br><br> A. Work<br><br> B. Energy<br><br> C. Matter<br><br> D. Power
Natasha2012 [34]
B- Energy!
Hope this helps!
7 0
2 years ago
Read 2 more answers
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