Answer:
A. Iron.
Explanation:
The Moon´s core is smaller in comparison with other terrestrial bodies. About 20% of the entire mass of it is the core.
The moon is composed of distinct crust, mantle, and core. While the crust is composed of freeze magma the core is believed to be formed by a mixture of metallic iron with a small amount of sulfur and nickel.
I hope this answer helps you.
Scientists believe the moon’s core might be formed of iron.
Answer:
5cm by 4cm by 10cm = 200
200 / 10 = 20
20 :>
b. False
this would be true.
B. Frequently cleaning the furnace filter.
C. Fixing cracks in the walls and floor.
D. Opening the front door in winter to filter and clean warm air.
Answer:
D. Opening the front door in winter to filter and clean warm ai
Explanation:
All of the following are examples of ways to improve energy efficiency of heating systems, except _______.
A. Closing off rooms that aren’t in use.
B. Frequently cleaning the furnace filter.
C. Fixing cracks in the walls and floor.
D. Opening the front door in winter to filter and clean warm air
for an heating systems it is better to keep the front door shut so that all the heat energy does not escape outside.
when heat energy is within a closed system ,it can still be utilized to keep the inhabitants warm otherwise there will be an exchange with the cold from winter fall outside the air, and the heating system's efficiency will be reduced
current
Answer:
Look at the picture
Explanation:
Answer:Correct ans is alternating current(AC CURRENT)
Explanation:Most houses in the U.S use alternative current for lights,fridges e.t.c that why when you turn of a switch in a room that particular rooms light goes off it doesn't affect the other rooms like what a direct current will do
Well how about direct current you Ask?
direct currents are also used in most homes examples are door alarms smoke detectors e.t.c
B. Inertia
C. Gravitational Force
Answer: The correct answer is mechanical energy.
Explanation:
Mechanical energy is the sum of the both potential and kinetic energies.
M.E = P.E + K.E
Potential energy is due to the position of the object.
Kinetic energy is due to the motion of the object.
When the barbell is lifted then it will have potential energy with small amount of kinetic energy.
When the shot put is thrown then there will be both potential energy and the kinetic energy.
Therefore, the mechanical energy is present in a barbell being lifted or a shot-put being thrown.