Answer: 5.884×10^-19 J
Explanation:
The change in energy will be the product of the planck constant and the frequency of radiation.
ΔE = hf
Where h = planck constant = 6.626×10^-34 m²kg/s
f = 8.88×10^14 Hz
ΔE = 6.626×10^-34 × 8.88×10^14 = 58.84×10^-20 = 5.884×10^-19 J
Here the block has two work done on it
1. Work done by gravity
2. Work done by friction force
So here it start from height "h" and then again raise to height hA after compressing the spring
So work done by the gravity is given as
Now work done by the friction force is to be calculated by finding total path length because friction force is a non conservative force and its work depends on total path
Total work done on it
So answer will be
None of these
The speed of the cart after 3 seconds of Low fan speed is (2) cm/s. This is further explained below.
<h3>What is speed?</h3>
Generally, speed is simply defined as the rapidity of movement or efficiency of operation.
In conclusion, After 8 seconds with the fan set at Low, the cart will have traveled 1 cm/s. After three seconds at medium fan speed, the cart travels at a velocity of two centimeters per second.
Read more about Speed
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Answer:
answer is D.it will decrease
Answer:
Explanation:
Given
Electrostatic force between two electrons is equal to weight of one electron
i.e.
where 
are the charge of particles
mass of electron
r=distance between them
