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DiKsa [7]
3 years ago
7

Help pls it’s urgent

Physics
2 answers:
Igoryamba3 years ago
3 0
The wave length becomes shorter and the pitch becomes higher
Svetllana [295]3 years ago
3 0
The wavelength becomes shorter and the frequency gets higher.
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A compressed spring has 16.2j of elastic potential energy when it is compressed 0.30m what is the spring constant of the spring
melisa1 [442]
The answer to the question is

<span>PE = W = 1/2 (kx^2)
16.2  = </span>1/2 (k(0.30)^2)
k = 360 J/m^2
7 0
3 years ago
The ratio of the potential difference across a conductor to the current in the conductor is called
svetoff [14.1K]

Answer:

The ratio of the potential difference across a metallic conductor to the current in the conductor is known as.

B. Resistance.

Explanation:

According to ohms law   " the current  passing through a conductor is directly proportional to the potential difference between the ends provided the temperature of the wire remains constant".

What is resistance ?

Resistance is a measure of the opposition to current flow in an electrical circuit

what is a resistor ?

a resistor is a n electric conductor which forms resistance to free flow of electric current, the resistance is measured in Ω

3 0
3 years ago
At height h above the surface of Earth, the gravitational acceleration is What is h? Note: The radius of Earth is 6380 km.
rusak2 [61]

The acceleration of gravity is inversely proportional to
the square of the distance from Earth's center.

The acceleration of gravity is 9.8 m/s² on the Earth's surface ...
6380 km from the center.

If the acceleration of gravity at 'h' is 4.9 m/s² ... 1/2 of what it is
on the surface, then the distance from the center is

                 (6380 x √2) =  9,023 km  (rounded) ,

and 'h' is the distance above the surface

                     = (9,023 - 6,380) =  2,643 km  (rounded) .

4 0
3 years ago
Why was Earth very hot at the beginning of its formation? Select all that apply.
Sladkaya [172]

Answer:

heat came from the supernova that led to the formation of solar system

4 0
3 years ago
I need help fast please help
Irina18 [472]
A and C Im pretty sure :)
5 0
3 years ago
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