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Gwar [14]
3 years ago
6

A box weighing 2.4 x 10^2 Newton's is lifted at a constant speed to a shelf 1.2 meters high in 4.0 seconds. What power is requir

ed to lift the box
Physics
1 answer:
Anuta_ua [19.1K]3 years ago
3 0

Answer:

72Watts

Explanation:

Power = Force * distance/Time

Given the following

Force = 2.4 x 10^2 = 240N

distance = 1.2m

Time = 4.0secs

Substitute

Power = 240*1.2/4

Power = 60 * 1.2

Power = 72watts

Hence the power required to lift the box is 72Watts

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How is power calculated? multiply force and displacement divide force by displacement multiply work and time divide work by time
Savatey [412]

Answer:

divide work by time

Explanation:

Power=work/time.

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4 years ago
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When cooking food in a microwave, why is it more important to rely on the internal temperature of the food rather than on a prev
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When cooking food in a microwave it is more important to rely on the internal temperature of the food because microwave do not adequately kills pathogens that may be in food.  Microwave normally penetrate food to the depth of 1 to 1.5 only. In thicker foods, microwave doesn't usually reach the center of the food, the un-reached part normally cook by conduction.
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Recall that if the colliding objects have hard surfaces, the collision is elastic. Based on this description, which bumper desig
Andrews [41]

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3 0
3 years ago
A car travels 98 miles in 1 hour and 45 minutes. what is the average speed?
Greeley [361]
Firstly let us get the time down to minutes from hours. Then the calculation will become easy.
1 hour and 45 minutes = (60 + 45) minutes
                                     = 105 minutes
So
The distance traveled by the car in 105 minutes = 98 miles
Then
The distance traveled by the car in 60 minutes = (98/105) * 60 miles
                                                                           = 5880/105 miles
                                                                           = 56 miles
So the average speed of the car as can be seen from the above deduction is 56 miles per hour.
4 0
3 years ago
If a ball is rolling at a velocity of 1.5 meters per second and has a momentum of 10.0 kg meters per second what is the mas6of t
g100num [7]

The mass of the ball is 6.67 kg

Explanation:

The momentum of an object is given by:

p=mv

where

p is the momentum

m is the mass of the object

v is its velocity

It must be noted that momentum is a vector quantity, so it has both magnitude and direction (but here only the magnitude is given).

For the ball in this problem, we have:

v = 1.5 m/s is its velocity

p = 10.0 kg m/s is its momentum

Solving the formula for m, we find the mass of the ball:

m=\frac{p}{v}=\frac{10}{1.5}=6.67 kg

Learn more about momentum:

brainly.com/question/7973509

brainly.com/question/6573742

brainly.com/question/2370982

brainly.com/question/9484203

#LearnwithBrainly

6 0
3 years ago
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