The things that determine the amount of an object's gravitational potential energy are ...
-- mass of the object
-- gravitational acceleration in the place where the object is
-- height of the object above the ground or the floor
A). <em>a slice of bread; </em> No. It's still a slice of bread even if it's on the ground.
B. <em>A compressed spring; </em> No. It's still a compressed spring even if it's on the ground.
C. <em>An apple on a tree</em>; <em>Yes !</em> It can't be an apple on a tree if it's on the ground.
D. <em>A stretched bow string</em>; <em>No.</em> It's still a stretched bowstring even if it's on the ground.
Answer: 15.6 metres
Explanation:
Given that:
length of wave (λ)= ?
Frequency of wave F = 28 Hertz
Speed of wave (V) = 437 m/s
The wavelength is the distance covered by the wave in one complete cycle. It is measured in metres, and represented by the symbol λ.
So, apply V = F λ
Make λ the subject formula
λ = V / F
λ = 437 m/s / 28 Hertz
λ = 15.6 m
Thus, the length of the wave is 15.6 metres
Answer:
3.87 or 3.9 mg
Explanation:
2.7h * 60mins = 162mins
number of 1/2 lives = 162/22= 7.364
amount remaining = 639(1/2)^7.364 = 3.8796
answer = 3.87 or 3.9
Answer:
E = 401.3 eV
Explanation:
As we know that the thinnest gap in the direction of metal is given as

so here we can say that lowest energy of photon will not able to break this electron from above thickness
so we will have

here we have

also we have

so we will have


Planet Y has rotated by 135.5° through during this time.
To find the answer, we need to know about the relation between angle and radius of orbit.
<h3>What's the expression of angle in terms of radius?</h3>
- Angle= arc/radius
- As arc = orbital velocity × time,
angle= (orbital velocity × time)/radius
- Orbital velocity= √(GM/radius), G= gravitational constant and M = mass of sun
- So, angle = (√(GM)× time)/radius^3/2
<h3>What's is the angle rotated by planet Y after 5 years, if ratio of the radius of orbit of planet X and Y is 4:3 and planet X is rotated by 88°?</h3>
- Let Ф₁= angle rotated by planet Y, Ф₂= angle rotated by planet X
- As time = 5 years ( a constant)
- Ф₁/Ф₂= (radius of planet X / radius of planet Y)^(3/2)
- Ф₁= (radius of planet X / radius of planet Y)^(3/2) × Ф₂
= (4/3)^(3/2) × 88°
= 135.5°
Thus, we can conclude that Planet Y has rotated by 135.5° through during this time.
Learn more about the orbital velocity here:
brainly.com/question/22247460
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