Answer: 83%
Explanation:
Efficiency of the process = work output/work input × 100%
Work input is the energy used up in the process = 720,000Joules
Work output = Force × distance
= (3000×10)× 20
= 600000 Joules
Efficiency= 600000/720000 × 100
= 0.83×100
= 83%
Acceleration is the rate at which an object picks up speed. deceleration is the rate at which an object loses speed.
Answer:
I = 0.058 [A]
Explanation:
Ohm's law is defined as voltage equal to the product of current by resistance.
where:
V = voltage = 4.2 [V]
I = current [amp]
R = resistivity = 72 [ohm]
Now clearing I, we have:
Answer:
The answer is A
Explanation:
When a rockets thrusters push on the ground the ground pushes back on the rocket with equal force in the opposite direction. Hence the rocket takes off.
Newtons third law of motion states, for every action there is an equal and opposite reaction.
Answer:
The simple harmonic wave function is
Explanation:
Generally a sine wave is mathematically represented as
Here A is the amplitude which is mathematically represented as
substituting 0.25 m for Z we have that
k is the wave number which is mathematically represented as
substituting 1.1 m for (wavelength ) we have
=>
w is the angular frequency which is mathematically represented as
Here T is the period which is mathematically represented as
substituting 13 wave pass for n and for t
So
So