The width of the playroom is 4 m
Answer:frequency=1/period
Explanation:
There relationship is
Frequency=1/period
Answer:
Vi = 94.64 m/s
Explanation:
I order to find out the initial velocity of the object, we can use third equation of motion:
2ah = Vf² - Vi²
where,
a = acceleration = -9.8 m/s²
h = maximum height covered by object = 460 m - 3 m = 457 m
Vf = Final Velocity = 0 m/s (since, object momentarily stops at highest point)
Vi = Initial Velocity = ?
Therefore,
2(-9.8 m/s²)(457 m) = (0 m/s)² - Vi²
Vi = √8957.2 m²/s²
<u>Vi = 94.64 m/s</u>
Answer:
The distance to the wall does not matter.
Explanation:
According to newton's third law, if you exert a force on the tennis ball to propel it northwards, it will exert equal and opposite force on you to propel you southwards. Therefore, how much you accelerate only depends on how fast you through the balls. And once a ball has left the system<em> ( consisting of you and the ball)</em>, it can no longer have an effect on you, so it doesn't matter whether the ball hits a wall nearby or the one millions of miles away.
<em>P.S: all of this is true assuming the balls don't bounce back from the wall and hit you in the face, which would surely give you additional southward acceleration, but it wouldn't be such a pleasant experience! </em>
Answer:
E) 314 nm
Explanation:
The relationship between speed, frequency and wavelength for an electromagnetic wave is given as:
V = fλ
Where;
V is the speed of the wave
f is the frequency of the wave
λ is the wavelength.
Making λ the subject of the equation,
λ = V/ f
λ = 2.05 x 10^8 / 6.53 x 10^14
= 3.14 x 10^-7 m
= 314 x 10^-9 m
= 314 nm