Answer:
x rays is the correct answer
To determine the number of photons emitted per second, we need data on the total power of the system and the total energy of the photons. We determine the power by multiplying the total area to the intensity of the sunlight given. We do as follows:
Power = 0.50 kW / m^2 ( π (0.001^2)) = 1.57x10^-6 kW = 1.57x10^-3 W
The energy of the visible light can be calculated from the expression:
Energy = hc / wavelength
where h is the planck's constant and c is the speed of light
Energy = (6.63 x 10^-34) (3 x 10^8) / 550 x 10^-9
Energy = 3.62 x 10^-19 J
Number of photons per second = 1.57x10^-3 J/s / 3.62 x 10^-19 J
Number of photons per second = 4.34x10^15
Net force required to accelerate the car is 6000 N
Explanation:
- Force is calculated by the equation, F = Mass × Acceleration
- This is based on Newton's Second Law of Motion which states that the force acting on an object is its mass times the acceleration of the object.
Here, mass = 3000 kg and acceleration = 2 m/s²
⇒ Force = Mass × Acceleration
= 3000 × 2 = 6000 N
⇒ F = 6000 N
⇒ M = 3000 kg
⇒ a = 2 m/s²
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