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Gekata [30.6K]
3 years ago
6

A car drives at a constant speed of 21 m/s around a circle of radius 100 m.

Physics
1 answer:
Arte-miy333 [17]3 years ago
8 0

Answer:

Option D. 4.4 m/s²

Explanation:

The following data were obtained from the question:

Velocity (v) = 21 m/s

Radius (r) = 100 m

Centripetal acceleration (a) =.?

The centripetal acceleration of the car can be obtained as follow:

Centripetal acceleration (a) = Velocity square (v²) / radius (r)

a = v²/r

a = 21²/100

a = 441/100

a = 4.41 ≈ 4.4 m/s²

Therefore, the centripetal acceleration of the car is 4.4 m/s².

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A selective college usually requires more years of _____ than a high school requires.
ipn [44]

Answer:

World languages__

Explanation:

A selective college usually requires more years of ___World languages__ than a high school requires. College graduates would look for jobs after college, they might have to travel to different countries. So, educating them about different language would give them a competitive edge to them. Moreover, in the age of globally integrated business community, knowing an extra language could work as cherry top on the cake.

5 0
3 years ago
The greatest speed recorded by a baseball thrown by a pitcher was 162.3 km / h, obtained by Nolan Ryan in 1974. If the ball leav
Pepsi [2]

Answer:

0.96 m

Explanation:

First, convert km/h to m/s.

162.3 km/h × (1000 m/km) × (1 hr / 3600 s) = 45.08 m/s

Now find the time it takes to move 20 m horizontally.

Δx = v₀ t + ½ at²

20 m = (45.08 m/s) t + ½ (0 m/s²) t²

t = 0.4436 s

Finally, find how far the ball falls in that time.

Δy = v₀ t + ½ at²

Δy = (0 m/s) (0.4436 s) + ½ (-9.8 m/s²) (0.4436 s)²

Δy = -0.96 m

The ball will have fallen 0.96 meters.

3 0
4 years ago
Which of the following can best be described as an element or compound
Lynna [10]

Answer:

A

Explanation:

because you cannot seperate the matter duhhh hahha

7 0
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Read 2 more answers
HELP NOW PLEASE ANSWER THE QUESTION THE PICTURE IS ATTACHED BELOW
ivolga24 [154]

Answer:

The answer is b, friction.

Explanation:

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3 years ago
Am example of a mechanical wave is?
Bogdan [553]
An example of a mechanical wave is a sound wave
3 0
4 years ago
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