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Masteriza [31]
3 years ago
12

Please help which one !!

Physics
1 answer:
Nostrana [21]3 years ago
6 0

Answer:

4th one

Explanation:

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The blade of a windshield wiper moves through an angle of 180.0 degrees in 0.500 s. The tip of the blade moves on the arc of a c
sweet-ann [11.9K]

Answer:

Centripetal acceleration will be equal to 10.66m/sec^2

Explanation:

We have given time taken to cover 180° is 0.5 sec

So time taken by 360° is equal to = 2×0.5 = 1 sec

Radius of the circle r = 0.520 m

So distance d=2\pi r=2\times3.14\times 0.520=3.2656m

So velocity v=\frac{distance}{time}=\frac{.2656}{1}=3.2656m/sec

We have to find the centripetal acceleration

Centripetal acceleration will be equal to a_c=\frac{v^2}{r}=\frac{3.2656^2}{1}=10.66m/sec^2

So centripetal acceleration will be equal to 10.66m/sec^2

7 0
4 years ago
Which of the following does not represent a mechanical wave?
Sergeeva-Olga [200]

ocean waves because its not artificial

3 0
4 years ago
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Which actions are evidence that a chemical reaction has occurred? Select five options. a change in color the formation of a prec
vladimir1956 [14]

Answer:

A change in color

The formation of a precipitate

A clear liquid becoming cloudy

The formation of bubbles

The formation of smoke

Explanation:

A chemical reaction can be defined as the conversion of reactant into product. The process in which one or more than one substance is converted into one or many different substances.

There are some indications which can provide the evidence that chemical reaction has occurred.

A change in color of the substance, formation or smoke or bubbles. The formation of the precipitate and in case the substance becomes cloudy.

All these evidences show that chemical reaction has occurred.

8 0
3 years ago
The first and second laws apply to _________________ objects.
Serggg [28]

Answer:

multiple

Explanation:

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A race car accelerates uniformly from 21.3 m/s to 26.5 m/s in 6.64 seconds. Determine the acceleration of the car and the distan
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Acceleration is 2.5693 (not rounded) or 2.57 (rounded). Distance Traveled is 158.696 (not rounded) or 158.7 (rounded)
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3 years ago
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