All categories

3 years ago

What do we need to know in order to make motion safe for all?

Physics

1 answer:

Ghella [55]3 years ago

7 0

Answer:

motion changes with time of the position or orientation of a body. Motion that changes the orientation of a body is called rotation.

Explanation:

You might be interested in

Do all types of waves need a medium to travel through

Vanyuwa [196]

No they all don't need a medium to travel.

Example is electromagnetic waves which travel through vacuum.

5 0

4 years ago

Consider a plastic rod that is being charged up by rubbing a wool cloth. It is then brought to an initially neutral metallic sph

anygoal [31]

Answer:

A) is repelled by the sphere

Explanation:

When a piece of plastic is rubbed with a wooden cloth, it sinks negatively
Let it change Q. So it is now allowed to touch the neutral zone. Therefore, there is a difference in the surface capacity of the two bodies, so that charge transfer takes place
Some of its negative charge is transferred to the metal sphere, now both the rod and the sphere are negatively charged and the same chargers as we know are repelled by each other.
so correct answer is A) is repelled by sphere

7 0

3 years ago

You place an object 30.0 cm from a concave mirror of 15.0 cm focal length. The object is 1.8 cm tall. Find the image position an

Softa [21]

Answer:30 cm

Explanation:

Given

object distance $u=30\ cm$

focal length of concave mirror $f=15\ cm$

height of object $h_o=1.8\ cm$

Using mirror formula

$\Rightarrow \frac{1}{v}+\frac{1}{u}=\frac{1}{f}$

$\Rightarrow \frac{1}{v}=\frac{1}{15}-\frac{1}{30}$

$\Rightarrow \frac{1}{v}=\frac{2-1}{30}$

$\Rightarrow v=30\ cm$

and magnification is

$\Rightarrow m=\frac{-v}{u}=\frac{h_i}{h_o}$

$\Rightarrow \frac{-30}{30}=\frac{h_i}{1.8}$

$\Rightarrow h_i=-1.8\ cm$

So height of object is same as of object .

Position :image is formed at the spot where object is placed.

4 0

3 years ago

You observe a star system for many weeks. The light curve does not show significant changes in brightness, but a series of spect

mariarad [96]

Based on the changes in the light curve and the behavior of the series of spectra, this is a<u> binary system. </u>

<h3>How is this is binary system?</h3>

The characteristics described are those of a binary system with the specific type of system being the spectroscopic binary system.

This is because in a spectroscopic binary system, there won't be significant changes in brightness but as a result of stars orbiting towards and then away from us, spectral features will appear as alternative absorption lines.

In conclusion, this is a binary system.

Find out more on binary systems at brainly.com/question/15868824.

8 0

3 years ago

David delivers meals to elderly people once a week. He uses a cart to move the meals. The cart has four smooth wheels. Which typ

Naya [18.7K]

Answer: rolling friction

Explanation: I think it is the answer

3 0

3 years ago