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Andrei [34K]
3 years ago
14

Help me on question 4 pls I’m giving out brainlest!!

Physics
1 answer:
Dafna11 [192]3 years ago
7 0
You can not find the density of the box 1 only including the mass. You need the volume as well. Density is mass divided by volume.
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An engine causes a car to move 10 meters with a force of 100 N. The engine produces 10,000 J of energy. What is the efficiency o
gregori [183]

Answer:

10%

Explanation:

Efficiency = work done / energy used

e = (10 m × 100 N) / (10,000 J)

e = 0.1

The efficiency is 0.1, or 10%.

4 0
4 years ago
A 5 kilogram cat is resting on top of a bookshelf that is 3 meters high. What is the cat’s gravitational potential energy relati
Free_Kalibri [48]
U=mgh
U=5kg*9.8N/kg*3m
U=147J
5 0
3 years ago
What Is Life?
kirill [66]

Answer:

Life is useless it has no meaning every one wil die and even if you don't die you can't change anything if you do change it won't have a cause. Animals are there to just survive and what do you do after you survive.it nothing life if just useless.

but because life is useless we can give meaning to life we can do what we like, help others get meaning for here life and altho life is useless we can live the useless life in fun

Explanation:

this took me 4 min to make

4 0
3 years ago
Read 2 more answers
What is the velocity of a wave with a frequency of 6 Hz and a wavelength of 2m?
astraxan [27]
Frequency multiplied by the wavelength
6*2 = 12
8 0
3 years ago
!!!
slavikrds [6]

Answer:

0.5

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