Answer:
Summer begins in the Northern Hemisphere on June 20 or 21 when the North Pole is tilted a full 23.5° toward the sun. On this day, the Northern Hemisphere has the most hours of daylight, while the Southern Hemisphere has the least hours of daylight.
Explanation:
Answer:
0.033 A
Explanation:
Current: This can be defined as the rate of flow of electric charge in a circuit.
The S.I unit of current is Ampere (A)
From Ohm's law.
V = IR ............................ Equation 1
Where V = Potential difference, I = current, R = resistance.
Making I the subject of the equation,
I = V/R................... Equation 2
Given: V = 52.3 V, R = 1570 Ω
Substitute into equation 2
I = 52.3/1570
I = 0.033 A.
Hence the current in the resistor = 0.033 A
Answer:
Joule
Explanation:
Joule is the SI unit of work or energy.
Answer:
The force that the football play kicked the ball with was 6.22n
Explanation:
The reason why it is 6.22N is because when you use the formula, F =MA
and you plug the numbers in, it eaquals 6.22n.
F=0.42*14.8
Answer: 7.175*10^18
Explanation:
Energy of a wave:
E = nhc/λ, where
E = energy of the wave
n = no of photons
h = Planck's Constant
c = speed of light
λ = wavelength of the wave
4000 = (n * 6.63*10^-34 * 3*10^8) / (510*10^-9)
4000 = 1.989*10^-25 * n / 510*10^-9
4000 = 3.9*10^-19 * n
n = 1.025*10^22 photons per second per meter²
7.0 cm² = 7.0 / 10,000 m²
= 7 x 10⁻⁴
Photons per second = 1.025*10^22 * 7 x 10⁻⁴
= 7.175*10^18 photons per second
