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natta225 [31]
3 years ago
15

How Is radar used to determine the speed of a car

Physics
1 answer:
Serga [27]3 years ago
4 0
Radars are frequently used to identify distance and speed, such as how far away an object is or how fast it is moving. <span>The </span>radar<span> device can then use the change in frequency to </span>determine the speed<span> at which the </span>car<span> is moving. In laser-</span>speed<span> guns, waves of light are </span>used<span> in place of radio waves.</span>
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A tsunami is ________. A. a sea wave generated by an earthquake, landslide, or meteor impact that may destroy coastal cities tho
a_sh-v [17]

Answer:

A. A sea wave generated by a displacement of water

Explanation:

7 0
3 years ago
What are the four components that can be derived from a unit of blood?
Katen [24]
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2. A student becomes so excited by the whole idea of black holes that he decides to jump into one. It has a mass 10 times the ma
LiRa [457]

Answer:

*Disclaimer you can't actually do that, or at least not yet because the nearest black hole is at least 1,000 light years away. But if we could...

His journy would be pretty fast and horrific. For him, he would slowly be streched apart or spegetified into a string of atoms as he nears the event horizoin. But for an outside observer he would apear to go slower and slower and would never actualy reach the event horizion. This is becuase of einstines general relativity, massive objects slow time down. He would also apear to become red as the lights wavelength is streched out due to the entense gravity of the black hole.

8 0
3 years ago
A pulley has a mechanical advantage of 1.
sertanlavr [38]

Answer:

There is no mechanical advantage

Explanation:

The mechanical advantage is possible only when the force needed to lift a load is lesser than the weight of the load.

For example, is we have a mechanical advantage of 2, the force needed to lift will be 1/2 of the weight of the load, and if we have a mechanical advantage of 4, the force needed will be 1/4 of the weight of the load.

In the attached image there are clear examples of mechanical advantage with pulleys.

7 0
3 years ago
The mass of an object is 4kg and it has a density of 5gcm^-3. what is the volume ​
Andru [333]

Answer:

density =   mass/ volume

5=4000/ volume

volume=4000/5

volume=800 cm^-3

4 0
3 years ago
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