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nalin [4]
3 years ago
8

HELP ASAP PLS

Physics
2 answers:
Marysya12 [62]3 years ago
8 0
Speed can be measured by bouncing waves off an object, because of the Doppler Effect.
german3 years ago
3 0

Answer: B. Doppler Effect

Explanation: Also known as Doppler shift, from Johann Christian Andreas Doppler, the scientist who first proposed this effect, the Doppler effect is the apparent change in frequency or wavelength of a wave that is perceived by an observer moving relative to the source of the waves. As such, the

Doppler radar such as those employed by the police uses reflected microwaves to determine the speed of moving objects which it does this by emitting waves of a particular frequency, and then analysing the reflected wave for frequency changes.

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Determine the elastic energy U stored in<br> the compressed spring.
hoa [83]

Answer:

Answer: The spring constant of the spring is k = 800 N/m, and the potential energy is U = 196 J. To find the distance, rearrange the equation: The equation to find the distance the spring has been compressed is therefore: The spring has been compressed 0.70 m, which resulted in an elastic potential energy of U = 196 J being stored.

Explanation:

7 0
2 years ago
What does more damage; a slow semi truck, or a fast sports car
Goshia [24]
The fast sports car does more damage then the slow semi truck
7 0
3 years ago
Select all that apply. which of the following astronomers supported the sun-centered system? tycho brahe johannes kepler coperni
Alex73 [517]
<h3 />

-Tycho Brahe and

-Ptolemy

<h3 />
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3 0
3 years ago
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A piece of wood that floats on water has a mass of 0.0175 kg. A lead weight is tied to the wood, and the apparent mass with the
crimeas [40]

Answer:

Specific gravity is 0.56

Explanation:

We know that

mass of water displaced by the wood is, m1( apparent mass when wood in air and lead is submerged in water) - m2(the apparent mass when wood and lead both are submerged in water)

= 0.0765 - 0.0452 = 0.0313 Kg

So the specific gravity of the wood is, = mass of wood / mass of water displaced by the wood

= 0.0175/0.0313

=0.56

5 0
4 years ago
Science help answer all
wlad13 [49]
Idk but i hope you figure it out :)
4 0
3 years ago
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