Answer:
595.73 X 10⁻⁶ V.
Explanation:
The magnetic field is towards the north with dip angle equal to 65 so the horizontal component of earth's magnetic field will be
H = 50 X 10⁻⁶ Cos 65 = 21.13 x 10⁻⁶ T.
length of rod L = 1.45 M
Velocity of rod = 70 km / h = 19.444 m /s
Since the top of the antenna rod is to have positive polarity , current induced in it will be from down to up . Magnetic field is towards the north .
To cut magnetic flux perpendicularly , rod should move towards the east .
We can easily get this direction by applying Fleming's right hand Rule.
Induced emf = H L v
= 21.13 x 10⁻⁶ X 1.45 X 19.444
= 595.73 X 10⁻⁶ V.
hmax = 5740.48 m. The maximum height that a cannonball fired at 420 m/s at a 53.0° angles is 5740.48m.
This is an example of parabolic launch. A cannonball is fired on flat ground at 420 m/s at a 53.0° angle and we have to calculate the maximum height that it reach.
V₀ = 420m/s and θ₀ = 53.0°
So, when the cannonball is fired it has horizontal and vertical components:
V₀ₓ = V₀ cos θ₀ = (420m/s)(cos 53°) = 252.76 m/s
V₀y = V₀ cos θ₀ = (420m/s)(cos 53°) = 335.43m/s
When the cannoball reach the maximum height the vertical velocity component is zero, that happens in a tₐ time:
Vy = V₀y - g tₐ = 0
tₐ = V₀y/g
tₐ = (335.43m/s)/(9.8m/s²) = 34.23s
Then, the maximum height is reached in the instant tₐ = 34.23s:
h = V₀y tₐ - 1/2g tₐ²
hmax = (335.43m/s)(34.23s)-1/2(9.8m/s²)(34.23s)²
hmax = 11481.77m - 5741.29m
hmax = 5740.48m
Answer:
The minimum intensity of light required is .
Explanation:
Number of elections , N=
Energy of each electron = E =
Total energy of N elections = T
The minimum intensity of light in Watts required to eject N electron sin 0.20 seconds :
Yes that's a true statement. That's why grandmother put a hot water bottle to warm up her bed, and not a hot bar of steel or lead.
Answer:
The correct answer is no.
Explanation:
The temperature of a person changes depending on their age, the physical activity they are doing and until the time of day.
There is an established average temperature that is 98.6 ° F (37 ° C) as a healthy temperature.
If the temperature exceeds 100.4 ° F (38 ° C) it means that you may be ill or have an infection.
The difference in temperature by age is very minimal, but it is still a difference. Let's see:
- Babies and children: from 97.9 ° F (36.6 ° C) to 99 ° F (37.2 ° C).
- Adults: from 97 ° F (36.1 ° C) to 99 ° F (37.2 ° C).
- Adults over age 65: 98.6 ° F (36.2 ° C).