a race car is traveling at 76 m/s[E] when it slows down at -9m/s^2 for 4 seconds. what is its new velocity?
1 answer:
You might be interested in
Yes.
In fact, from the graph we see that the threshold frequency (the minimum energy of the incoming energy needed to extract a photoelectron from the material) is (we see it because this is the frequency at which the maximum kinetic energy of the emitted electron is zero).
The incoming photon in this problem has a frequency of 8.0 E14 Hz, so above the threshold frequency, therefore it is enough to extract photoelectrons from the material.
Answer:
The maximum speed of the wing tip is 1.25 m/s
Explanation:
In simple harmonic motion, the body experiences a restoring force whose magnitude is directly proportional to the distance from its mean position and its direction is towards the mean position.
The speed in the case of simple harmonic motion is given by the equation :
v = Aωsinωt
Here A is maximum displacement, t is time and ω is the angular frequency of oscillation.
For maximum speed, sinωt = 1 . So, the above equation becomes:
v = Aω
But, ω = 2πf , here f is the frequency of oscillation. So,
v = A x 2πf .....(1)
In this problem,
Frequency of oscillation, f = 40 Hz
Total distance between the upper and lower limits of motion of wing tip is equal to the twice of maximum displacement of the wing tip from the equilibrium position, i.e. ,
2 x A = 1 cm
A = 0.5 cm = 0.5 x 10⁻² m
Substitute the value of f and A in equation (1).
v = 1.25 m/s
Remember the following formulas to convert temperatures between Farenheit and Celsius:
Convert all the temperatures to Celsius to compare them.
<h2>Part a)</h2>Convert 265ºF to Celsius:
Then, 265ºF is equal to 129.444...ºC. Then, 265ºC is higher than 265ºF.
The correct choice is option 2) 265ºC.
Part b)
Convert 370ºF to Celsius:
Then, 370ºF is equal to 187.777...ºC. Then, 200ºC is higher than 370ºF.
The correct choice is option 2) 200ºC.