Answer: When an ambulance passes with its siren blaring, you hear the pitch of the siren change: as it approaches, the siren’s pitch sounds higher than when it is moving away from you. This change is a common physical demonstration of the Doppler effect.
Explanation:
Answer:
Number of years for the asteroid to make one revolution about the sun is 2.83 years
Explanation:
The square of the period , T of any planet in a circular orbit with radius, r is given by:
T^2= (4pi^2/Gm) × r^3 ...eq1
For earth,T^2earth= (4pi^2/Gm) × r^3 ...
eq2
Where m is mass of the sun
Divide eq1 by eq2 , you get:
T^2/T^2earth = (r/rearth)^3
Substituting r=2reath , we get:
T^2/T^2earth =( 2rearth/rearth)^3
T/Tearth = Sqrt(8)
T/Tearth= 2.83
The period the earth revolves around the sun is 1 year
T/1 = 2.83
T= (1 × 2.83)years
T = 2.83 years
Answer:
Vx = 10.9 m/s , Vy = 15.6 m/s
Explanation:
Given velocity V= 19 m/s
the angle 35 ° is taken from Y-axis so the angle with x-axis will be 90°-35° = 55°
θ = 55°
to Find Vx = ? and Vy= ?
Vx = V cos θ
Vx = 19 m/s × cos 55°
Vx = 10.9 m/s
Vx = V sin θ
Vy = 19 m/s × sin 55°
Vy = 15.6 m/s
D. adding one student to the team on the left
