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slava [35]
3 years ago
14

A scientific theory is:

Physics
1 answer:
aalyn [17]3 years ago
8 0
I'm almost positive the answer is a.
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When an atom undergoes nuclear Decay what happens???<br>​
noname [10]

Answer:

It changes into a completely different element

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2 years ago
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If the velocity of gas molecules is doubled, then it’s kinetic energy will?( hint formula for kinetic energy is KE=.5 x mv2)
eduard

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D quadruple

Explanation:

E = \frac{1}{2}mv^2\\E'=\frac{1}{2}m(2v)^2=\frac{1}{2}m4 v^2 = 4(\frac{1}{2}mv^2)=4E

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a bucket filled with water has a weight of 150 N and is attached to a rope that is woud around a pully (solid disc) with a 0.5m
maria [59]

Answer:

20 rad/s^{2}

Explanation:

weight / force (F) = 150 N

radius (r) = 0.5 m

mass (m) = 15 kg

angular acceleration = tangential acceleration / radius

where

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  • substituting the above into the equation for angular acceleration we have

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5 0
3 years ago
PLS HELP!!! The quarter back runs 75 meters down a football field in 12 seconds to score a touchdown. How fast did he run? A. 0.
atroni [7]

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B.6

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speed = distance / time

= 75m / 12s

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3 years ago
A baseball is thrown straight downward with an initial speed of 40 ft=s from the top of the Washington Monu- ment (555 ft high).
sergij07 [2.7K]

Answer:

4.53 second, 195 ft/s

Explanation:

u = 50 ft/s

h = 555 ft

g = 32 ft/s^2

Let the time taken by the ball to reach the ground is t and the velocity of the ball as it hits the ground is v.

Use third equation of motion

v^{2}=u^{2}+2as

v^{2} = 50^{2}+2\times 32 \times 555

v = 195 ft /s

Thus, the ball strikes the ground with velocity 195 ft/s.

Use first equation of motion

v = u + at

195 = 50 + 32 t

32 t = 145

t = 4.53 second

Thus, the ball reach the ground in 4.53 second.

8 0
3 years ago
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