<span> d = r*t is the basic distance equation
d = 6000 km
t with the tail wind = 6 hr
r with the tail wind = speed of the plane + wind speed = s + w
t with the head wind = 7.5 hr
r with the head wind = speed of the plane - wind speed = s-w
(s+w)*6 = 6000
(s-w)*7.5 = 6000
s + w = 1000
s - w = 800
</span><span> 2s = 1800
s = 900 km/h
s + w = 1000
w = 100
Check the anwer by calculating the return trip.
(900-100) * 7.5 = 800 * 7.5
800 * 7.5 = 6000 km
Answer: The rate of the jet in still air is 900 km/h. The rate of the wind is 100 km/hr.</span>
-- Light a candle. Chemical energy stored in the wax
is converted to light and heat.
-- Turn a flashlight on. Chemical energy stored in the battery
is converted to electrical energy, which flows through the wiring
to the light-bulb. As the electric current current flows through the
bulb, electrical energy is converted to light and heat.
-- Plug a fan into a wall outlet. Electric current flows through
the line-cord to the motor, where electrical energy is converted
to kinetic energy. The kinetic energy of the motor is sent to turn
the fan blades, where it is used to move air.
-- Electromagnetic energy from the sun strikes the surface of a
photoelectric cell, where it is converted to electrical energy.
A.
One individual was born with more muscle fibers.
A.)When heated, the molecules get loser, and the dipole dipole interaction is still there, but they dont stay so closely together, and jossle around with momentary meetings of opposite charges
B.The heat is used to break the bonds between the ice molecules as they turn into a liquid phase<span>. </span>