First law of thermodynamics is based on conservation of energy that states that energy can never be destroyed, it changes from one form to other form of energy. As in the given image, boiler gives thermal energy in the form of steam and this thermal energy do work on turbine by rotating it.
Second law of thermodynamics states that heat energy always moves from high temperature region to low temperature region until no external energy is given. As in the given image, boiler have high temperature steam and turbine is low temperature region. Therefore, high temperature stream moves from lower area to the turbine.
Hence correct answer -
First law: Thermal energy is used to do work on the turbines.
Second law: High-temperature steam flows to an area of lower temperatures in the turbines.
Answer:
The average force has a magnitude 6524 N due north.
Explanation:
The average net force F = ma where m = mass of car = 1400 kg and a = acceleration.
a = (v - u)/t where u = initial velocity of car = 0 m/s (since it starts from rest)
v = final velocity of car = 27 m/s due north and t = time of motion = 5.8 s
a = (27 m/s - 0 m/s)/5.8 s = 27 m/s ÷ 5.8 s = 4.66 m/s
Since the direction of the velocity change is the direction of the acceleration, the acceleration is 4.66 m/s due north.
The average force, F = ma = 1400 kg × 4.66 m/s = 6524 N
Since the acceleration is due north, the average force takes the direction of the acceleration.
So the direction of the average force is due north
The average force has a magnitude 6524 N due north.
Answer:
1,211.1 kg.
Explanation:
the force of gravity is less on the moon than on earth, so if the man can lift 200kg on earth, he could lift a greater amount on the moon because there is less resistance from gravity.
To know the amount of mass he can lift on the moon, we first need to know the amount of weight that is equivalent to those 200kg here on earth. This because the weight of the object is equal to the force that must be applied to lift it, and that force is applied by the man and it will be the same here and on the moon.
We calculate weight using the formula:
where is the weight of the object (the force with which the earth attracts the object) is the mass and g the acceleration of gravity.
so
for earth the acceleration due to gravity is:
thus:
now we use this value to calculate the mass he can lift on the moon, since for the moon .
we use the same equation, w =mg substituting w = 1962N and :
he can lift 1,211.1 kg.
You can also find the result using the approximate value of the acceleration of gravity on the moon as g/6, where g is the acceleration on earth.
A group of cats is called a clowder.