Answer:
1440 W
Explanation:
The power drawn by a voltage source is the rate of energy consumed, and it can be written as:
where
V is the voltage
I is the current
P is the power
For the source in this problem we have:
I = 12 A is the current
V = 120 V is the voltage of the source
Solving for P, we find the power:
Keplers law says the planet sweeps out equal area slices of the ellipse-shaped pie in equal times. Thus when the planet is at its closest approach, aligned with the semi minor axis it has to be moving fastest in order to sweep out a big enough arc to obey the law. Moving fastest means it has the largest kinetic energy. Also it's the lowest potential energy. If you think of it like a pendulum, the closest approach of the planet is like the point in a pendulum's arc when it's straight down. It's moving fastest there and all potential energy has been converted to kinetic energy.
Answer:
54 kg
Explanation:
Mass of person = 93 kg =
Mass of water = 62 kg =
Dividing the above two masses we get
Hence, the mass of the person is 1.5 times the mass of the water in them
Now, Mass of person = 81 kg =
So, the mass of water in a person that has mass of 81 kg is 54 kg
Answer:
tension is 37.8 N
Explanation:
given data
mass of bar m1 = 2 kg
length of bar L = 1.4 m
suspended mass m2 = 5 kg
suspended object position length L2 = 0.8 m
to find out
tension
solution
we consider here bar is connected with hinge and
we know here system is equilibrium
so here net torque will be zero at joint
and mass 2 kg act at L1 = 1.4 /2 = 0.7 m
so torque = m1×g× ( L1 ) + m2 ×g× (L2) - T(L)
so
2 ×9.8 × ( 1.4/2) + 5×9.8 × ( 0.8) - T(1.4) = 0
T = 52.98 / 1.4
T = 37.8
so tension is 37.8 N