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inn [45]
3 years ago
11

A bobsled team accelerates the sled to go to 150 m/s in 3 seconds from rest.(a)What is the

Physics
1 answer:
Sergeeva-Olga [200]3 years ago
7 0

Answer:

Explanation:

From the equation of Newton's laws of motion

v = u + at where v is final velocity , u is initial velocity and t is time.

150 = 0 + a x 3

a = 50 m / s ²

s = ut + 1/2 at²  ; s is distance travelled

s = 50 x 3 + .5 x 50 x 3²

= 150 + 225

= 375 m .

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A motor is used to lift a 10 kg mass 2 m above the ground in 4 s. If the power input to the motor is 100 W. what is the efficien
Bad White [126]

Answer:

98%

Explanation:

Given parameters

Mass of motor = 10kg

Height = 2m

Time = 2s

Power input = 100w

Unknown

Efficiency = ?

Solution

Efficiency is the percentage of the power output to the power input.

Power is the rate at which work is done.

Power output = mass x g x height / time

g is the acceleration due to gravity

Power output = 10x 2 x 9.8 / 2 = 98W

Efficiency = power output/ power input x 100

Efficiency = 98/100 x 100 = 98%

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2 years ago
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aleksley [76]

Answer:

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3 years ago
A quantity y is to be determined from the equation y=(px)/q^2
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3 years ago
In order to protect underground pipelines and storage tanks made of iron, the iron is made the cathode of a voltaic cell through
emmasim [6.3K]

The answer would be that the process to protect the underground pipelines and storage tanks is cathodic protection.

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3 years ago
The half-life of iodine-131 is 8.04 days. It’s decay constant equals
Svetllana [295]

Answer:

Explanation:

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3 years ago
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