Answer:
Option D is the answer
Explanation:
The gravitational pull of the sun bends the path of the planet making it move in a elleptical path.
The distance between the minima decreases.
The distance between the maxima stays the same.
The distance between the minima increases.
The distance between the minima stays the same.
The amplitude of the pendulum is 5cm.
Amplitude is the maximum displacement of the wave from its mean position upwards or downwards.
As the graph of the motion of pendulum swings from +5cm to -5cm for each cycle, the magnitude of peak amplitude of the pendulum is 5 centimeters.
Learn about amplitude.
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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
Explanation:
mass - 2kg
energy - 16 j
2
k.e- 1/2mv
2
16j=1/2×2×v
2
16×2/2=v
2
16=v
√16=v
V=4m/s
then momentum =mv
= 2×4
= 8 kgm/s