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WARRIOR [948]
3 years ago
5

Help! Will mark brianliest!!

Physics
1 answer:
cluponka [151]3 years ago
3 0
From energy conservation principle, first law of thermodynamics

Change in internal energy = heat input - work done by system

Change in internal =500-300= 200 J
Change in internal energy = final energy - initial energy
200= final energy - 1500

Total final energy = 200+1500
= 1700J
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If a net horizontal force of 0.8 N is applied to a toy whose mass is 1.2 kg what acceleration is produced?
julia-pushkina [17]

Answer:

<h2>0.67 m/s²</h2>

Explanation:

The acceleration of an object given it's mass and the force acting on it can be found by using the formula

a =  \frac{f}{m}  \\

f is the force

m is the mass

From the question we have

a =  \frac{0.8}{1.2}   \\  = 0.666666...

We have the final answer as

<h3>0.67 m/s²</h3>

Hope this helps you

6 0
3 years ago
Weight is measured in units called
Aleksandr-060686 [28]
Pounds

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3 years ago
What is the average speed of the car if the car is travelling at the constant speed?
vovikov84 [41]
The average it the constant speed.
7 0
3 years ago
In designing structures in an earthquake-prone region, how should the natural frequencies of oscillation of a structure relate t
Genrish500 [490]

Answer:

Natural frequencies of oscillation and typical earthquake frequencies should be different.

Damping on the structure should be large.

Explanation:

The natural frequency of the structure must be different from the typical earthquake frequency, the more different the better. This is because if both frequencies were the same or similar there is a risk that the building will <u>resonate </u>and collapse.

As for the damping, it must have a high value. This so that the building resists earthquakes better and prevents it from moving dangerously, thus damping on the structure should be large.

7 0
4 years ago
You lift a book slowly from the floor to the table. You then lift an identical book rapidly from the floor to the table. Compare
mel-nik [20]

Answer:

Power output is greater

Explanation:

The books mentioned are all identical and the to which these books are being lift up is same in both the slow and the fast process.

Now , we know that the work done is the scalar product of force applied and its displacement and displacement in both the cases is same. Thus the net work done is also same.

If we talk about Power, then power is work done per unit time. It includes the time which was absent in work done and also the time here is in inverse proportion to power. Thus slower process will take more time and less power while faster one will take less time and more power.

5 0
4 years ago
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