C.-2 miles per hour per second
Explanation;
Acceleration = change in velocity / time
Acceleration = (final velocity - initial velocity )/time
Acceleration = (v - u)/t
Given: u = 20 miles per hour, v = 10 miles per hour
t = 5 seconds
Acceleration = (10 - 20)/5
Acceleration = -10/5
Acceleration = -2 miles per hour per second
Answer:
the angular displacement Δθ of the tub during a spin of 92.1s is 3122.19 rad or 496.91 rev
Explanation:
Given;
Angular velocity v = 33.9 rad/s
Time t = 92.1 s
Angular displacement d = angular velocity × time
d = vt
Substituting the given values;
d = 33.9 × 92.1 rad
d = 3122.19 rad
To revolutions;
revolution = radian/2π
d = 3122.19/2π rev
d = 496.91 rev
the angular displacement Δθ of the tub during a spin of 92.1s is 3122.19 rad or 496.91 rev
Radiation is the transfer of heat energy through space by electromagnetic radiation. Most of the electromagnetic radiation that comes to the earth from the sun is in the form of visible light. Light is made of waves of different frequencies.
Answer:
1362000 kgm/s
Explanation:
So the total mass combination of the plane and the people inside it is
M = 35000 + 160*65 = 45400 kg
After 15 seconds at an acceleration of 2 m/s2, the plane speed would be
V = 2*15 = 30 m/s
So the magnitude of the plane 15s after brakes are released is
MV = 45400 * 30 = 1362000 kgm/s
Answer:
total mass is 1095.096 kg
Explanation:
given data
thrust = 67000 N
impulse time t = 285 sec
mass fraction = 0.92
to find out
total mass of the vehicle
solution
we know here thrust formula that is
thrust = m × g × t
put here value and find m
m = 67000 / 9.8(285)
m = 23.988 kg/s
so here mass fraction is express as
mass fraction = m × time / (m × time + mf)
put here time after 42 sec
0.92 = 23.988 × 42 / (23.988 × 42 + mf)
(23.988 × 42 + mf) 0.92 = 23.988 × 42
mf = 87.60 kg
total mass = mf + m × time
put here value
total mass = 87.60 + 23.988 × 42
total mass is 1095.096 kg