Answer:
Energy will be equal to
Frequency will be equal to
Explanation:
We have given frequency of the radar f = 10 GHz
Speed of light
Plank's constant
So energy ,here h is plank's constant and is frequency
So energy
In second case we have given wavelength = 25 cm = 0.25 m
Wavelength is equal to
So
So frequency will be equal to
False
No. The buoyant force on an object is the portion of its weight that appears to vanish
when the object is in any fluid (could be either a liquid or a gas).
If the object happens to float in a particular fluid, then the buoyant force at that moment
is equal to the object's weight.
Notice that the buoyant force on an object will be different in different fluids.
M=125 kg
v=1.75 m/s
From the law of linear momentum
P =mv
Case 1 50*V =M* 0.7 equation 1
50*V =(M+50)* 0.5 equation 2
equating 1 and 2
M* 0.7=(m+50)* 0.5
0.2 M= 25
Putting value of M in equation 1
50*V =125*0.7
V=1.75 m/s
I believe the answer is A.
Answer: about 1,100,000,000 to 1,500,000,000 Joules/second
1 MW (megawatt) = 1,000,000.00 J/s (joules per second)
1100(1,000,000) = 1,100,000,000
1500(1,000,000) = 1,500,000,000