Answer:
Cost = $ 3,995
Explanation:
Let's start by looking for the energy consumed, which is the power over time
E = P t
The power is 65 W, the time is 12 h each day, in a period of 30 days the time is
t = 12 30 = 360 h
E = 65 360
E = 23,500 W h
We reduce to KW h
1 kW = 1000 W
E = 23.5 kW h
Let's use a direct ratio rule (rule of three) to find the cost
Cost = 23.5 17.0
Cost = 399.5 c
Cost = $ 3,995
Answer:
Explanation:
A) <em>Large</em>: As she opens her parachute, she begins to displace a large volume of air. This leads to a Large air resistance
B) <em>increase, weight</em>: As she falls, the air resistance force <u><em>increases</em></u>. Now there is a force acting in opposite directions to her <u><em>weight.</em></u>
C)<em>Weight, Decelerate:</em> The skydiver has only the downward force of her <u><em>weight</em></u> pulling down on her, so she starts to <u><em>decelerate</em></u>
D) <em>Weight, Upward, Resultant</em>:
Her <u><em>weight </em></u>is now equal to the <u><em>upward </em></u>force from the ground. Her <u><em>resultant </em></u>force is then zero
E) <em>Increases, same, constant, resultant, terminal</em>:
As she accelerates faster, the air resistance force <u><em>increases</em></u>. It is now the <u><em>same </em></u>as her weight. She now moves at a <u><em>constant</em></u> speed because the <u><em>resultant </em></u>force acting on her is zero. She is now at her <u><em>terminal </em></u>velocity.
F) <em>Increases, same, constant, terminal</em>:
As she decelerates, the air resistance force on her parachute <u><em>increases </em></u>until it is the <u><em>same</em></u> as her weight. She is now moving with a <u><em>constant </em></u>speed until she hits the ground - a new slower <u><em>terminal</em></u> velocity
Lightning heats the air so rapidly that it creates a shock wave that we call thunder.
Answer:
1 and 3
Explanation:
because they are going up from 0
