Answer:
10.6 s
Explanation:
First of all, let's convert both speeds into m/s:
- Cheetah:
- Gazelle:
Taking as reference the position x = 0, the position of the cheetah at time t is
while the position of the gazelle, which starts 68.8 m ahead, is
The cheetah catches the gazelle when the two positions are equal:
and substituting the speeds and solving for t, we find the time at which the cheetah reaches the gazelle:
Compared to the emitted radio waves, the radio waves reflected from the vehicle and received by the radar gun have a<u> higher frequency.</u>
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<h3>What is the frequency?</h3>
Frequency is defined as the number of repetitions of a wave occurring waves in 1 second. Its unit is Hz. Frequency is given by the formula as,
A moving car is targeted by radio waves sent from a radar gun by a police officer standing still.
The radio waves reflected off the vehicle and picked up by the radar gun have a greater frequency than the radio waves that were transmitted.
A stationary police officer directs radio waves emitted by a radar gun at a vehicle moving toward the officer.
Compared to the emitted radio waves, the radio waves reflected from the vehicle and received by the radar gun have a<u> higher frequency.</u>
Hence the higher frequency is the correct answer for blanks.
To learn more about the frequency refer;
brainly.com/question/14926605
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Answer:
the action of measuring something is called measurement
Answer:
the speed of the car moving after accelerating for 56 m is 20 m/s
Explanation:
The computation is shown below:
As we know that
Vf^2 = Vi^2 + 2ad
= ( 8m/s )^2 + 2 ( 3m/s2 ) ( 56m)
= 400 m2/s2
Vf = 20 m/s
Hence, the speed of the car moving after accelerating for 56 m is 20 m/s
Answer:
It has to overcome earth's gravity and have enough fuel to land on the moon at a slow enough speed