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3 years ago

Why do we use the name electromagnetism to describe the force of an

Physics

1 answer:

ElenaW [278]3 years ago

5 0

Answer:

magnet, gravity

Explanation:

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John has decided he needs to work harder on his Social Studies project. Then, his teacher says if he gets a good grade in Social

bezimeni [28]

Answer: Extrinsic to intrinsic

Explanation:

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3 years ago

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Solnce55 [7]

Answer:

3m2

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2 years ago

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A local fun house incorporates a gently curved, concave, spherical mirror into its display. When a child stands 1.2 m from the m

lys-0071 [83]

Options:

a) more than 0.8 m .

b) equal to 0.8 m .

c) between 0.5 m and 0.8 m .

d) less than 0.5 m .

Answer:

b) equal to 0.8 m .

Explanation:

Note:

An upside down image = Inverted Image

An image that appears in front of the mirror = Real image

An image that appears behind the mirror = Virtual image

Let the object distance from the pole of the mirror be u

When the child stands 1.2 m from the mirror:

u = 1.2 m ( Real and Inverted image of the child is formed)

When the child stands about 0.8 m from the mirror:

u = 0.8 m (Virtual, erect and magnified image of the child is formed)

When the child stands about 0.5 m from the mirror:

u = 0.5 m ( Virtual and erect image of the child is formed)

Note: All objects positioned behind the focal length of a concave mirror are always real. Objects start becoming virtual when they are placed on the focal length or in front of it (Close to the pole of the mirror), although objects placed on the focus has its image formed at infinity.

Since the nature of the image formed changed from real to virtual when the child stands about 0.8 m from the mirror, then the focal length is approximately equal to 0.8 m

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3 years ago

The snowblower driver figured that he moved 1250 kg of snow. If the plow pushes with a force of 40000 Newton’s, how fast did the

alexgriva [62]

The acceleration of snow is 32 m/ $s^{2}$ .

<u>Explanation:</u>

According to Newton's second law of motion, the force acting on any object is directly proportional to the product of mass and acceleration acting on the object.

So if the object is a snowblower driver with mass 1250 kg and the force acting on it is 40000 N, then the acceleration of the snow can be determined from the ratio of force to mass.

Force = Mass × Acceleration

Acceleration = $\frac{Force}{Mass}$ = $\frac{40000}{1250}=32 m/s^{2}$

Thus, the acceleration of the snow is 32 m/ $s^{2}$ .

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3 years ago

What is a Harmful mutation

kompoz [17]

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