Yes it is ! Because u need to learn about weathering
Answer:
B. 6 s
Explanation:
Given in the y direction:
Δy = 0 m
v₀ = 30 m/s
a = -10 m/s²
Find: t
Δy = v₀ t + ½ at²
0 m = (30 m/s) t + ½ (-10 m/s²) t²
0 = 30t − 5t²
0 = 5t (6 − t)
t = 6
Yes, an object can have both of these at the same time. Potential energy is energy that is stored in an object. Kinetic energy is the energy that is associated with motion. So what you have to have is an object that is in motion but still has more energy that it has yet to convert into kinetic energy.
<u>Answer:</u>
A perfect example of wave reflection is an <u>echo</u>.
<u>Explanation:</u>
A wave reflection takes place when waves cannot pass through a surface and in turn they bounce back. It is not necessary that wave reflections can only happen with sound waves, they can also take place in light waves. Also, the waves which are reflected have the same frequency as the original wave, but their direction is different. When a wave strikes an object in the same angle, they bounce back straight but when they hit an object with different angle, their direction changes.
Newton's law of universal gravitation:
F = GMm/r²
F = gravitational force, G = gravitational constant, M and m are the masses, r = distance between the masses
Given values:
F = 4.24×10⁻¹⁰N, G = 6.67×10⁻¹¹Nm²kg⁻², M = m = 29kg
Plug in and solve for r:
4.24×10⁻¹⁰ = 6.67×10⁻¹¹(29)(29)/r²
r = 11.5m