Answer:
a. 3 m/s
Explanation:
The magnitude of the momentum of an object is given by:
where
m is the mass of the object
v is the speed of the object
For the ball in this problem, we know:
p = 12 kg m/s is the momentum
m = 4 kg is the mass
Solving the equation for v, the speed, we find:
Let's consider two resistors only for simplicity. When the resistors are connected in parallel, the potential difference on each resistor is the same, and it is equal to the voltage of the battery, V:
(1)
Instead, the current splits in the two resistors:
(2)
where I is the current in the circuit, I1 and I2 are the currents in the two resistors.
By using Ohm's law, we can rewrite (2) as
(3)
where
is the equivalent resistance of the circuit. But we also said that
So we can rewrite (3) as
which becomes
So, the equivalent resistance of the parallel of n resistors is given by
Answer:
power
Explanation:
it helps to do work without power we cant do any things
Explanation:
It is a good idea to start with room temperature water in the calorimeter because the room temperature water helps to determine the heating up/cooling down because of the environment as the experiment takes place. Because the calorimeter heat is the same as the heat of the water.
That statement is a big fat prevarication.
Magnetic field lines start at one Pole and end at the OTHER one.