Answer:
ΔT = 1.22*10^-3 °C
Explanation:
First, you calculate the potential energy of the bird when it is at 35 m high. The potential energy is also the mechanical energy of the bird in this case.

m: mass of the bird = 0.75kg
g: gravitational constant = 9.8m/s^2
h: height = 35m

All this energy is given to the water. You use the following formula in order to calculate the change in temperature:

m: mass of the water = 50kg
c: specific heat of water = 4186 J/kg°C
Q is equal to U (potential energy of the bird) because the bird gives all its energy to water. By doing ΔT the subject of the formula you obtain:

hence, the maximum rise in temperature is 0.00122 °C
Answer: E = 7394.6N/C
Explanation:
Please find the attached file for the solution
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Answer:
2000 J
Explanation
Work equation is expressed as:

Where:
F: Applied force
d: traveled distance
α: Angle between the direction of the force and the direction of the movement. (in this case, both of the direction are the same, so the angle is 0°)
By substituting:

Have a nice day!
Answer:
v=30 m/s
Explanation:
h - height
g - acceleration due to gravity=10
t - time
v- velocity

45 = 5t²
t² = 9
t=3 seconds
v=g×t
v=10×3
v=30 m/s

Explanation:
Given:


The cross product
is given by


