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777dan777 [17]
3 years ago
15

A 5 kg ball is traveling at the same speed as a 10 kg ball. Compared with the 5 kg ball, the 10 kg ball has

Physics
1 answer:
tresset_1 [31]3 years ago
6 0
Answer choices ??? Or are there not any ?
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Which of the following is a chemical change?
klemol [59]

a). Water is still H₂O after it freezes.

b). Ice is still H₂O after it melts.

c). Wire is still Cu when it's bent.

d). Paper combines with the O₂ in the air, and turns into
     a lot of new compounds when it burns.

3 0
3 years ago
when an object falls to the ground, only the object moves down but the earth's motion is not noticeable​.why?
vlada-n [284]
Both the object and earth pulls each other towards itself but since the mass and pulling force of objects are very small the pulling force of objects are negligible.
7 0
3 years ago
What is the term used to describe the energy needed to get a reaction started
olganol [36]
Activation Energy is the amount of energy needed to get a reaction started.
3 0
2 years ago
True or false The theory of plate tectonics is the study of how Earth's surface has remained the same for billions of years
sveticcg [70]
False, it is not the theory
3 0
3 years ago
A sound source emits 20.0 W of acoustical power spread equally in all directions. The threshold of hearing is 1.0 × 10-12 W/m2.
ahrayia [7]

Answer:

0.0018 W/m²

Explanation:

Power and intensity are related as:

I=\frac{P}{4\pi r^2}

P=  20.0 W (given)

r = 30.0 m (given)

I=\frac{20.0}{4\pi(30.0)^2}=0.0018 W/m^2

Intensity in decibels:

I(dB)=10log\frac{I}{I_o}\\=10log\frac{0.0018}{10^{-12}}=92.5 dB

7 0
3 years ago
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