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:
It's 2–
Explanation:
Usually, in ionic bonds, these elements will receive 2 electrons, so its ion will carry a 2– charge
Answer:
D. Ted expanded more power.
Explanation:
Given the following data;
For Ted.
Force = 10N
Height = 1.5m
Time = 1 seconds
To find Ted's power;
Power = workdone/time
But workdone = force * distance
Workdone = 10 * 1.5
Workdone = 15 Nm
Power = 15/1
Power = 15 Watts.
For Johnny.
Force = 10N
Height = 1.5m
Time = 2 seconds
To find Ted's power;
Power = workdone/time
But workdone = force * distance
Workdone = 10 * 1.5
Workdone = 15 Nm
Power = 15/2
Power = 7.5 Watts
Therefore, from the calculations we can deduce and conclude that Ted expanded more power.
