Answer:
A. Shorter in wavelength and higher in energy
Explanation:
The peak wavelength of a star can be found by using Wien's displacement law:
where
b is the Wien's displacement constant
T is the surface temperature of the star
From the equation, we see that the peak wavelength 
is inversely proportional to the temperature: therefore, a star which is hotter then the sun (greater T) will have shorter wavelength.
Moreover, the energy of the emitted radiation is inversely proportional to the wavelength:
where h is the Planck constant, c is the speed of light. Therefore, shorter wavelength means higher energy.
So, the correct answer is
A. Shorter in wavelength and higher in energy
Answer:
The time save by Simpson is 25.8 minutes.
Explanation:
Given that,
Velocity of the car, v = 48 km/h
Distance covered by the car, d = 144 km
Let t is the time taken by the car. Speed of an object is given by distance covered per unit time. It is given by :
t = 3 hours
If the velocity is increased to 56 km/h to the east. Time taken is given by :
t' = 2.57 seconds
The time save by Simpson increasing his average velocity is given by :
or
So, the time save by Simpson is 25.8 minutes. Hence, this is the required solution.
Answer:
15 seconds
Explanation:
If car was moving at 20m/s for 3 sec.
if car traveled 100m = 15 sec total
Force of earth gravity on 1 kg mass is 9.8 N.
Since the mass is at earth surface, therefore its distance from the centre of earth is equal to the radius of the earth i.e. 6400 km.
The force of earth gravity is calculated as
F=GMm/r^2 =(6.67*〖10〗^(-11)*6*〖10〗^24*1)/〖(64*〖10〗^6)〗^2 =9.8 N
Molten Mattet Seeps through the crust and forms new land.
