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skad [1K]
3 years ago
13

The energy of a machine that is transformed into heat:

Physics
1 answer:
Lina20 [59]3 years ago
5 0

Answer:

can be transformed back into mechanical energy

Explanation:

energy never is destroyed it created, just transformed

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10. According to Newton's First Lawy , if a box is pushed with no external resistance, what will the action of the box be ?
kati45 [8]

Explanation:

According to Newton's First Law of motion, if a box is pushed with no external resistance, the box will keep on moving due to the absence of external force. It might gets stopped due to frictional force that is acting between the surface and the ball. The first law of motion is also known as law of inertia. the magnitude of force acting on the object is given by second law of motion.

4 0
3 years ago
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Assume that the stopping distance of a van varies directly with the square of the speed. A van traveling 40 miles per hour can s
Daniel [21]

Answer:

d = 100.8 ft

Explanation:

As we know that initial speed of the van is 40 miles then the stopping distance is given as 70 feet

here we know that

v_f^2 - v_i^2 = 2 ad

so here we have

0^2 - 40^2 = 2 a (70 feet)

now again if the speed is increased to 48 mph then let say the stopping distance is "d"

so we will have

0^2 - 48^2 = 2 a (d)

now divide the above two equations

\frac{40^2}{48^2} = \frac{70 feet}{d}

d = 100.8 ft

4 0
4 years ago
A parcel has a mass of 500 g .calculate its weight (assume the gravitational field strength is 10 N/Kg
Effectus [21]

Answer:

5N

Explanation

convert grams to kg and multipy with 10 (.5 *10)=5N

5 0
3 years ago
Which material would you take, steel or bricks to design a bridge? Why?
Vesna [10]

Answer:

steel

Explanation:

steel because steel has more power to hold something up, where bricks arent as stable

4 0
3 years ago
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PLEASE HELP COME UP WITH 5 MULTIPLE CHOICE QUESTIONS FROM HEALTH RELATED FITNESS AND SKILL RELATED QUESTIONS
Helga [31]

Answer:

1. What is not considered a cardiovascular workout?

A. Jogging

B. Sit ups

C. Jump Ropes

D. Burpees

Explanation:

I am sorry, I am in middle school and I only have one question.

5 0
3 years ago
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