Where is the rest of the sentence?
Answer:
The speed will be "18km/s". A further explanation is given below.
Explanation:
According to the question, the values are:
Wavelength,



As we know,
⇒ 
On substituting the values, we get
⇒ 
⇒ 
⇒ 
⇒ 
or,
⇒ 
Answer:
Use the method on the image and solve it.
Answer:
55%
Explanation:
take efficiency=power output/power input multiply by 100%