PHYSICS MIDDLE SCHOOL

If you push a book against a wall hard enough, it will not slide down even though gravity is pulling it. Use what you know about friction and Newton’s laws of motion to explain why the book does not fall.

Answers

Answer 1
Answer:

Answer:

280 i think

Explanation:


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HIGH SCHOOL

Describe the relationship between the weight of water in the catch bucket and the object in the beaker. A. The weight of the volume of the water is less than the buoyant force of the object. B. The weight of the volume of the water is equal to the buoyant force of the object. C. The weight of the volume of the water is greater than the buoyant force of the object. D. The weight of the volume of the water is not a factor in the buoyant force of th

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The statement which best describe sthe relationship between the weight of water in the catch bucket and the object in the beaker is definitely  B. The weight of the volume of the water is equal to the buoyant force of the object, according to the Archimedes' principle in which is  said that weight of the fluid that would occupy the column is equal to water. I am pretty sure it will help.
HIGH SCHOOL

With fuel prices for combustible engine automobiles increasing, researchers and manufacturers have given more attention to the concept of an ultralight car. Using carbon composites, lighter steels, and plastics, a fuel-efficient car can be manufactured at 540 kg. How much less does an ultralight car weigh compared to a 1450-kg Honda Accord (2007)

Answers

Answer:

Then the difference of weight between the two cars are:

Δw = 14210 - 5292 = 8918 N

Explanation:

An object's weigh due to the gravitational attraction force of the earth is:

w = mg

            Where: m is the object's mass

                         g is the  gravitational acceleration in the surface earth

                         g = 9.8 m/s2

The the ultralight car's weight is:

And the Honda Accord's weight is:

Then the difference of weight between the two cars are:

Δw = 14210 - 5292 = 8918 N

HIGH SCHOOL

How does a television signal differ from a standard radio wave

Answers

Signal of television as radio waves are of same origin: electromagnetic waves
The difference between them is only in the frequency in which they are issued.
A TV signal carries a lot more information that a standard radio signal does ...
it has to give the receiver enough information to draw a picture and color it,
in addition to just making sound.

In order to carry more information, the TV signal has to spread over wider band
of frequency, or a wider 'channel' that a radio signal occupies.
Example:  The AM radio band, between 550 and 1700 on your dial, accommodates
many radio stations in a band of roughly 1.2 MHz. And the FM radio band, between
88 and 108 on your dial, accommodates many FM stations in a band of 20 MHz.
But each and every TV channel is given a space of 6 MHz to operate in.

Partly related to this reasoning is the fact that all broadcast TV operation takes place
at frequencies higher than any commercial AM radio, and most TV is at frequencies
that are also higher than all FM radio.

 
HIGH SCHOOL

What makes science different from other fields of knowledge like art or philosophy?

Answers

As opposed to art or philosophy, science is an objective phenomenon. It deals with something which is verifiable, meaning that it can be tested, and it is based on facts, which are true and can be proven. On the other hand, art is highly subjective, which means that it can be interpreted in many different ways. Science is more concrete and testable, whereas art and philosophy lie in the domain of the abstract.
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