Answer:
E = 0.4 kWh
Explanation:
Given that,
The power of a bulb, P = 40 W
Time, t = 10 hours
We need to find the energy used by the bulb. Let it is equal to E. So,
So, 0.4 kWh of energy would be needed.
No. A greater force must push it
C. position of the object
Hope it helps! :)
The frequency of a tuning fork that takes2.50×10⁻³ s to complete one oscillation would be 400 Hz.
<h3>What is the frequency?</h3>
It can be defined as the number of cycles completed per second. It is represented in hertz and inversely proportional to the wavelength.
As given in the problem a tuning fork takes 2.50×10⁻³ s to complete one oscillation.
Frequency = 1/time period of the oscillation
Frequency of the tuning fork = 1/time period
=1/2.50×10⁻³
=400 Hz
Thus the frequency of a tuning fork comes out to be 400 Hz.
Learn more about frequency here, refer to the link;
brainly.com/question/14316711
#SPJ1
Answer:
206 pm
Explanation:
We are given that
Potential difference,
Distance,d=
We have to determine the de Brogile wavelength of the electron.
A=11 and B=5
Charge on electron,q =
Mass of electron=m=
Speed of electron,
Using the formula
v=
de Brogile wavelength, 
Where 
1 pm=
