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Dimas [21]
3 years ago
8

Which one of the following is not a fundamental physical quantity??! A. Temperature b. Current c. Area d. Mass​

Physics
1 answer:
Hatshy [7]3 years ago
3 0

Answer:

Out of this, Area is not a fundamental physical quantity.

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The equation for the speed of an electromagnetic wave is
igomit [66]

Answer:

c = 1 / √(ε₀*μ₀)

Explanation:

The speed of the electromagnetic wave in free space is given in terms of the permeability and the permittivity of free space by

c = 1 / √(ε₀*μ₀)

where the permeability of free space (μ₀) is a physical constant used often in electromagnetism and ε₀ is the permittivity of free space (a physical constant).

4 0
3 years ago
A 10.0kg water balloon is dropped from a height of 12.0m. Calculate the speed of the balloon just before it hits the ground
kolbaska11 [484]

Answer:

15.5 m/s.

Explanation:

Potential energy of the balloon has been converted to kinetic energy.

potential energy = kinetic energy.

mgh = ½mv².

10* 10* 12= ½ *10 *v²

1200 = 5v²

v²=1200÷5

v=√240

v= 15.49~15.5 m/s.

5 0
2 years ago
Marcus drove his Honda Prelude for 4 hours at a rate of 55 miles per hour. How far did he travel?
galben [10]
To solve this, you’d multiply 55 by 4, because he is travelling 55 miles every hour, for four hours, which means 55 miles every hour. The answer would be 220.
7 0
3 years ago
Read 2 more answers
If you run the 100 m track at a velocity of 5.0 m/s, what is the time needed?
Tresset [83]
100/5= 20, 20 seconds is the time needed.
8 0
2 years ago
The speed of sound in air is 331 m/s. what is the plane's speed in terms of the speed of sound?
Zina [86]
<span>The initial speed, u of plane in terms of velocity of sound which may be taken as U
u=142/331=0.429*U
It crosses the sound barrier after says t seconds then we have 331-142=23.1*t or t is given 8.18 s exactly t=9/11s.
After 18 seconds the plane will traveling with velocity V
V=142+18*23.1=557.8 m/s==1.685*U</span>
5 0
2 years ago
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