Answer:
Power, P = 112500 watts
Explanation:
It is given that,
Mass of the car, m = 1500 kg
Initial velocity of the car, u = 0
Final velocity of the car, v = 30 m/s
Time taken, t = 6 s
The minimum average power delivered by the engine is given by :
P = W/t
Where
W = work done
t = time taken
Work done = change in kinetic energy
So,
P = 112500 watts
So, the minimum average power delivered by the engine is 112500 watts. Hence, this is the required solution.
Answer:
The half-life of the isotope is 2 hours
Explanation:
The Geiger counter is a device that is used for the detection and measurement of all types of radiation( that is alpha, beta and gamma radiation).
Initially, the Geiger counter also known as the Geiger Muller tube registers 160 counts per minutes when placed near a radioactive isotope. After eight hours, the counter registers 10 counts per minute, this reduced number of counts means that n half lives has elapsed.
10 counts per minute = 1/16 of 160 counts per minutes.
Therefore 1/16 = 1/2⁴, comparing 1/2⁴ with where n is the number of elapsed half lives, n = 4. This means that 4 half lives has elapsed after 8 hours.
Therefore one half life of the isotope = 8/4 = 2 hours.
Answer:
1.327363 m/s
0.00090243 m
Explanation:
u = Initial velocity
v = Final velocity
m = Mass of flea
Energy
The velocity of the flea when leaving the ground is 1.327363 m/s
The flea will travel 0.00090243 m upward