PHYSICS MIDDLE SCHOOL

What is the difference between Dark Matter and Anti-Matter? Explain.

Answers

Answer 1
Answer: dark matter makes up 95•\• of the universe. anti matter is made up of anti particles

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How is net force determined if two students moving a piano exert force in the same direction

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The net force is determined is basically who is pushing harder in a specific direction.Like since there bith pushing in the same direction the net force is in the direction that they are pushing.

Can somebody match the following ???

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Answer:

  1. elastic rebound =A.
  2. volcano=D.
  3. seismometer=B.
  4. seismic waves=C.

I Hope This Helps

a pebble sinks in water a twig floats on top of the water compare the densities of the water, the pebble and the twig

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A pebble that sinks in water has greater density than a twig floats on top of the water. A pebble has more mass in it and more compact compared to a twig. The water cannot easily penetrate the pores of the pebble unlike twigs. That is why pebbles have greater densities than twigs.

The acceleration of the gravity Moon is equal to one-sixth of Earth's gravitational acceleration times. if an astronaut has a mass of 60 kg, what is the mass ande weight of the astronauts on the moon?

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In your question, when you said "... an astronaut has a mass of 60 kg ...",
you didn't mention where he has that mass ... you only said that he has it.
Clearly, then, his mass doesn't depend on where he is. It's the same mass
everywhere.

His weight, however, does depend on where he is, because the weight of
any object is the gravitational force between the object and something else.

When the 60-kg astronaut is on Earth his weight is 588.4 newtons (132.3 pounds).

When he is on the moon, his weight is 97.4 newtons (21.9 pounds).
'mass' will be same every where ....weight differs and it depends upon gravity .....u said mass of astrounaut is 60 .....so on moon also mass will be 60 kgs ...but weight differs ....and on moon he "weighs" 97.4 newtons

What is electric current measured in

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It is measured in volts
Measured in volts, also called voltage.

HELP ASAP! A certain wave has a frequency of 200 Hz and a wavelength of 2 meters. Calculate the wave speed. SHOW WORK! Question 13 options:

Answers

Answer:

400 m/s

Explanation:

From the question;

  • The frequency of the wave is 200 Hz
  • Wavelength of the wave is 2 meters

We are required to calculate the speed of the wave;

  • We need to know that the speed of the wave is calculated by multiplying frequency by the wavelength of the wave.
  • That is, speed = wavelength × frequency
  • In this case;

Speed of the wave = 200 Hz × 2 m

                               = 400 m/s

  • Thus, the speed of the wave is 400 m/s
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