PHYSICS HIGH SCHOOL

Which of the following is not a state of matter?a. solid
b. liquid
c. water
d. plasma

Answers

Answer 1
Answer:
Water doesn't belong on that list.

If it's removed, then there's a space to add GAS, which does belong.

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YAHOO ANSWERSA 1260 kg car moving south at 12.9 m/s collides with a 2430 kg car moving north. The cars stick together and move as a unit after the collision at a velocity of 4.38 m/s to the north. Find the velocity of the 2430 kg car before the collision.

Answers

Explanation:

Below is an attachment containing the solution.

One consequence of Einstein's theory of special relativity is that mass is a form of energy. This mass-energy relationship is perhaps the most famous of all physics equations: E=mc2,
where m is mass, c is the speed of the light, and E is the energy. In SI units, the units of speed are m/s. For the preceding equation to have consistent units (the same units on both sides of the equation), the units of E must be which of the following?

Answers

Answer:

Unit of energy is kg-m/s or Joules.

Explanation:

The mass- energy relationship in physics is given by :

E=mc^2

Where

m is the mass of the object

c is the speed of light

The SI unit of m is kilogram while the SI unit of c is as same as speed of light i.e. m/s. So, the unit of energy is kg-m/s. It is also equivalent to Joules.

So, the SI unit of energy is kg-m/s or Joules. Hence, this is the required solution.
Joule is the si unit for energy

A ball is thrown vertically upward with an initial velocity of 23.6 meters per second. What is the maximum height reached by the ball? Please include your answer with a unit symbol.

Answers

Answer:

Maximum height attained by the ball will be h = 28.416 m

Explanation:

We have given initial speed of the ball u = 23.6 m /sec

At maximum height velocity will be zero so final velocity v = 0 m/sec

Acceleration due to gravity g=9.8m/sec^2

From law of motion we know that v^2=u^2-2gh

0^2=23.6^2-2* 9.8* h

h = 28.416 m

So maximum height attained by the ball will be h = 28.416 m

_____________ was a popular technique used by animator, Tim Burton. With this animation technique, objects/puppets are made by the artist, and each time they are moved, the artist photographs them instead of drawing them.a. Cel animation
c. Projecting animation
b. Computer Generated Imagery
d. Stop motion animation

Answers

The correct answer is D. stop motion animation. It's called stop motion because you make an illusion of a motion by moving and stopping the characters and then reshooting. This is pretty common but takes a lot of time so not many people choose to do it. It also takes great skill to do it, not just patience.

Stop motion animation is the popular technique that is used by animator, where objects/puppets are made by the artist, and each time they are moved.

What is animation?

Animation can be regarded as a method whereby figures are been manipulated so as to appear as moving images.

One of the notable type of animation is Stop motion animation where the artist photographs the figure instead of drawing them.

Learn more about animation at;

brainly.com/question/25109803

In Alamogordo, New Mexico, falling rocks are a hazard along US Highway 82. If a rock falls from a cliff with 157 N of force,what was the mass of the rock?

Answers

Answer:

Mass, m = 16.02kg

Explanation:

Given the following data;

Force, F = 157N

Since it's a free fall, acceleration, a = g = 9.8m/s² (acceleration due to gravity).

To find the mass;

Force is given by the multiplication of mass and acceleration.

Mathematically, Force is;

F = ma

Where;

  • F represents force measured in Newton.
  • m represents the mass of an object measured in kilograms.
  • a represents acceleration measured in meter per seconds square.

Making mass (m) the subject of formula, we have;

Mass (m) = (F)/(a)

Substituting into the equation;

Mass (m) = (157)/(9.8)

Mass, m = 16.02kg

Therefore, the mass of the rock is 16.02kg.

What is the speed of a wave yhat has a frequency of 2.0Hz

Answers

You can't tell the speed of a wave from only its frequency.

You also need to know either the wavelength, or what substance
the wave is traveling through.

-- If you know the frequency AND wavelength, you can
calculate the speed.

-- If you know what substance the wave is traveling in, you can
probably determine its speed without knowing anything else about it.
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