3 years ago

Which is an example of a chemical change?

2 answers:

7 0

When you put coke on a rusty bumper and the rust comes off. or if something rust because the chemical make up of the object has changed.

zhenek [66]3 years ago

3 0

Fire burning wood or a other thing

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A top-fuel dragster accelerates from rest to a velocity of 100 m/s in 8 s. What is the acceleration?

seropon [69]

Answer:

100 m/s ÷ 8 = 12.5 m/s

Explanation:

You must put multiply (÷)

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2 years ago

A 10 kg ball is held above a building with a height of 30 m. What is the

Darina [25.2K]

Answer: 2940 J

Explanation: solution attached:

PE= mgh

Substitute the values:

PE= 10kg x 9.8 m/s² x 30 m

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3 years ago

List 3 quantities of waves.

VARVARA [1.3K]

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3 years ago

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Which one of the following statements does not accurately describe vibrations?

Paladinen [302]

A. Forced vibrations, such as those between a tuning fork and a large cabinet surface, result in a much lower sound than was produced by the original vibrating body.

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3 years ago

If a wave has a frequency of 74 Hz and a speed of 444 m/s, what is the wave's wavelength?

DaniilM [7]

Answer:

6 m

Explanation:

velocity = wavelength x frequency

444 m/s = wavelength x 74 Hz

444 m/s / 74 Hz = wavelength

wavelength = 6m

4 0

2 years ago