Answer:
C. 1 month
Explanation:
The moon orbits around the earth once in a time of 27.322 days and it also takes about 27 days to orbit around its own axis. Due to this the moon is not seem to be spinning and it always seems still to observer who is observing from the Earth.
The moon takes about almost 1 month to make 1 revolution around the Earth . It also takes approximately the same time to make one rotation about its axis. This is why we always see the same face of the moon.
Answer:
7.83
Explanation:
Just using the speed ,distance and time relation..Let time be T
Use this formula and find the distance covered by automobile .
Do same for car ..
and at last subtract the distance of automobile to car =141.
i.e (Distance of automobile -Dist.of car )=141
The mass of the petcock of the pressure cooker is 0.257 kg.
The total pressure inside the cooker is= atmospheric pressure+Gauge pressure
=100 kPa+101 kPa=201*10^3 Pa
The area of the petcock is= (π/4)d^2=0.785*0.004^2=12.56*10^(-6) m^2
Now the mass of the petcock is calculated as
P=(F/A)=(mg/A)
201*10^3=(m*9.81/(12.56*10^(-6)
m=0.257 kg
Therefore the mass of the petcock is 0.257 kg
Wavelength = (speed) / (frequency)
Wavelength = (340 m/s) / (600 /s)
Wavelength = 0.567 meter
