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Kamila [148]
3 years ago
15

Cars are safety tested to see how quickly they come to a stop under many conditions. The distance and time of one of these tests

is graphed. What is the change in velocity during the first second? A) 20 m/s Eliminate B) 30 m/s C) 0 m/s D) 50 m/s
Physics
2 answers:
agasfer [191]3 years ago
8 0

Answer:

The answer is C) 0/s

Explanation:

stepladder [879]3 years ago
5 0

Answer:Is C,0

Explanation:

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In which situation is a person doing work on an object?
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Answer : When a person applies force and covers distance then the person is doing work on an object.

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Which types of geometrical symmetry does a sphere have?.
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A sphere has reflection symmetry across any plane through its center.
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A train traveled 350km in 2.5h. what was the average speed of the train?
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Speed equals distance divided by time, so 350 divided by 2.5 equals 140 kilometers per hour.
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A horizontal 2.00\ m2.00 m long, 5.00\ kg5.00 kg uniform beam that lies along the east-west direction is acted on by two forces.
Sunny_sXe [5.5K]

Answer: 240\ rad/s^2

Explanation:

Given

Length of beam l=2\ m

mass of beam m=5\ kg

Two forces of equal intensity acted in the opposite direction, therefore, they create a torque of magnitude

\tau =F\times l=200\times 2=400\ N.m

Also, the beam starts rotating about its center

So, the moment of inertia of the beam is

I=\dfrac{ml^2}{12}=\dfrac{5\times 2^2}{12}\\\\I=\dfrac{5}{3}\ kg.m^2

Torque is the product of moment of inertia and angular acceleration

\Rightarrow \tau=I\alpha\\\\\Rightarrow 400=\dfrac{5}{3}\times \alpha\\\\\Rightarrow \alpha =240\ rad/s^2

7 0
3 years ago
The relative humidity would be ________% if the actual water vapor in the air was 4 grams per cubic meter, the air's capacity to
AveGali [126]

Answer:

50%

Explanation:

Humidity is the amount water vapor present in the atmosphere.

Relative humidity is defined as the ratio of partial water vapor present in air to the actual water vapor at a particular temperature. It is expressed in percentage and the higher the percentage RH, the more the saturated water vapor present in the atmosphere and vice versa.

It is expressed mathematically as shown;

RH = actual water vapor in air/saturated water vapor × 100%

If the actual water vapor in the air was 4 grams per cubic meter and the air's capacity to hold water vapor was 8 grams per cubic meter

Actual water vapor = 4g/cm³

Air's water capacity (saturated water vapor) = 8g/cm³

RH = 4/8×100

RH = 50%

3 0
3 years ago
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