A) Its mass
I think this is the answer because if another planet had a bigger mass the other planets and the sun itself would orbit it. I am not sure though this is my best guess.
<span>Why is hydrogen a light gas whilst iron is a heavy metal= it is </span>because iron atoms have more mass. hope it helps
1. Power.
Power is the rate of energy transfer or the rate at which work is done.
2. watt
Power=energy or work done/time=1 J/1s=1 watt (w)
3. Current times the voltage
E=QV
Q=I times t
E=VIt
p=E/t
p=VIt/t
p=VI
4.200 watts
p=VI=40 x 5=200 W
5. Amount of power available is significantly greater.
p=VI
When V increases, I must go down at the same time so that p doesn’t increase.
Since I is decreased, the power losses due to joule’s heating effect is decreased. The equation representing the energy loss for joule’s heating effect is:
E=I^2Rt
As I is decreased, the energy loss also decreases. Power=energy transferred/time and so as the energy loss due to Joule’s heating effect is decreased, the power loss is also decreased.
B is the correct q2ureire awej\
Answer:
1.26 s
Explanation:
Draw a free body diagram. There are three forces: weight force mg pulling down, vertical tension component Tᵧ pulling up, and horizontal tension component Tₓ pulling radially.
Sum of forces in the vertical direction:
∑F = ma
Tᵧ − mg = 0
Tᵧ = mg
Sum of forces in the centripetal direction:
∑F = ma
Tₓ = m v² / r
Tension force must be in the same direction as the string, so:
Tₓ / Tᵧ = 75 / 40
40 Tₓ = 75 Tᵧ
40 m v² / r = 75 mg
8 v² / r = 15 g
v = √(15gr / 8)
Plugging in values:
v = √(15 × 10 m/s² × 0.75 m / 8)
v = 3.75 m/s
The circumference of the path is:
C = 2πr
C = 2π (0.75 m)
C = 4.71 m
So the period is:
t = C / v
t = 4.71 m / 3.75 m/s
t = 1.26 s
Round as needed.