Answer: This is true
Explanation: v2=800/25= 32m/s
<u><em>Answer:</em></u>
B. 285 km/5 min
<u><em>Explanation:</em></u>
<u>The rule that links velocity, wavelength and frequency is:</u>
V = λν
<u>where:</u>
V is the velocity that we want to find
λ is the wavelength of sound = 1 m
ν is the frequency of the wave = 950 Hz
<u>Substitute to get the velocity as follows:</u>
V = 1 * 950 = 950 meters/sec
Now, we need to convert the meter/sec into Km/5 minutes
<u>We know that:</u>
To convert from meter to Km, we will divide by 1000
To convert from sec to minute, we will divide by 60 which means that, to convert from sec to 5 minutes, we will divide by 5*60 = 300
<u>Based on this:</u>
Hope this helps :)
Answer:
diameter = 5m
radius = 2.5m
distance in 1 revolution = 2 (pi) r = 2 * 22/7 * 2.5
distance in 3 revolutions = 3* 22/7* 2* 2.5 (we could take the value of 22/7 as 3.14)
= 3* 3.14* 5 = 9.42* 5 = 47.10
as the body comes back to the same position the displacement is 0
Explanation:
Answer:
Acceleration is the rate of change in velocity.
Explanation:
For example if you were riding in a car the change in velocity which is defined as an speed in direction. So if you were in a car and the car went from 30 MPH to 40 MPH the speed of the car has accelerated giving you acceleration.