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Romashka-Z-Leto [24]
3 years ago
14

The thermal energy of an object depends on its mass, mass or temperature, or both?

Physics
1 answer:
AveGali [126]3 years ago
6 0

Answer:

Only Temperature

Explanation:

substances dont have a set Temperature and mass has nothing to do with its temperature.

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Why isn't direct current used in transformers​
Furkat [3]

Answer:

No, it will not and this has a historical importance. The reason is that transformers work via induction of electrical forces by changes in magnetic fields, so the constat fields produced by dc currents won't work at all

Explanation:

4 0
3 years ago
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A square has sides of length 45mm.<br> What is the area of the square in mm²?
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3 years ago
Three identical train cars, coupled together, are rolling east at speed v0. A fourth car traveling east at 2v0 catches up with t
Bezzdna [24]

Answer:

1v_0

Explanation:

Assuming that cars 4 and 5 have same mass so that the momentum  

P=mv where m is mass and v is velocity hence

Momentum=0+2mv+3mv=5mv

The final mass is 2m+3m=5m

From aw of conservation of momentum

5mv_0=5mv hence v=1v_o

Therefore, the speed is 1v_0

7 0
3 years ago
The picture shows a jar of grape jelly. If you were to shine a bright light through the jar, what would happen to most of the li
inessss [21]
It would be reflected because the jelly isn't all the way transparent
8 0
3 years ago
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A stone is launched vertically upward from a cliff 384 ft above the ground at a speed of 80 ft divided by s. Its height above th
goldenfox [79]

Answer:

2.5 seconds

Explanation:

s(t) = -16t^2 + 80t + 384

for

0≤t≤8

First we differentiate s(t) to get s'(t)

s'(t) = -32t + 80

Let us then find the critical point; thus we will equate s'(t) to zero and then search for values where s'(t) is undefined

s'(t) = -32t + 80 = 0

t = 80/32

t = 2.5 sec

Let us evaluate s at the critical points and end points

s(0) = -16(0)^2 + 80(0) + 384 = 384

s(2.5) = -16(2.5)^2 + 80(2.5) + 384 = 684

s(8) = -16(8)^2 + 80(8) + 384 = 0

Thus, the stone attains it maximum height of 684ft at at t=2.5s

3 0
3 years ago
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