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3 years ago

Friction helps your vehicle stop quickly. A. TRUE B. FALSE

Physics

2 answers:

Fiesta28 [93]3 years ago

7 0

Answer:

true

Explanation:

because my vehicle is a faster go to the school

meriva3 years ago

4 0

Answer:

true

Explanation:

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Why evaporation are called surface phenomenon?

Eva8 [605]

The water formed on the surface of the water evaporation loss (evaporation), consisting of plant transpiration water loss (transpiration) is called. Soil near the plant and the resulting water loss is called by evapotranspiration.

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4 years ago

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Tom Sawyer runs 10 m/s down the dock and leaps on to his floating raft already moving 1.5 m/s away from shore. If Tom weighs 70

KatRina [158]

Answer:

Not the right answer in the options, speed is 4.47 m/s, and the procedure is coherent with option A

Explanation:

Answer A uses mass and velocity units, which are momentum units. By using the conservation of momentum:

. $p_{initial} =p_{final} \\m_{Tom}*v_{Tom}+m_{raft}*v_{raft}=(m_{Tom}+m_{raft})*v_{both} \\70*10+130*1.5 kg*m/s=895kg*m/s\\v_{both}=\frac{895 kg*m/s}{200 kg} =4.47 m/s$

Since Tom stays in the raft, then both are moving with the same speed. From the options, the momentum is in agreement with option A, however, the question asks for speed.

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3 years ago

What is a physiotherapist <br>

iragen [17]

Physiotherapists help people affected by injury, illness or disability through movement and exercise, manual therapy, education and advice

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3 years ago

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Construction worker used 450 N of force to move materials 5 meters in 2 minutes.

marin [14]

Power = Δenergy/Δtime or Δwork/Δtime

To solve this problem you first have to find what the energy or work value is. In this case I am going to solve for work.

Work = force × distance
= 450 × 5
Work = 2250 J

Now that you know what the work value is you plug it into the power formula

P = Δwork/Δtime
= 2250 J/2 min
Power = 1,125 watts

hope this helps :)

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3 years ago

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Time period of a simple pendulum is measured at Karachi. What change will occur in the time period, if it is measured on mount e

Reil [10]

The period of a pendulum is given by $T=2 \pi \sqrt{ \frac{l}{g} }$
since Karachi is near sea level, g is larger than it is on Mt. Everest. That means the pendulum will have a larger period on Mt. Everest than it would in Karachi.

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3 years ago