Answer:
three balls have the same speed
Explanation:
In a parabolic motion we have that
but the time just before the balls hit the ground is
Hence we have
ball A
ball B
ball C
Hence, all three balls have the same speed just before hit the groug
vA=vB=vC
I hope this is useful for you
regards
The internal resistance of the washing machine is 137.14 Ω.
<h3>What is internal resistance?</h3>
Internal resistance is the inherent resistance of a conductor.
To calculate the internal resistance of the washing machine, we use the formula below.
Formula:
- P = I²R................... Equation 1
Where:
- P = Power of the washing machine
- I = Current
- R = Internal Resistance of the washing machine.
Make R the subject of the equation
- R = P/I²................ Equation 2
From the question,
Given:
Substitute the these values into equation 2
- R = 420/1.75²
- R = 137.14 Ω
Hence, the internal resistance of the washing machine is 137.14 Ω.
Learn more about internal resistance here: brainly.com/question/20595977
#SPJ1
Answer:
1.5min
Explanation:
To solve the problem it is necessary to take into account the concepts related to Period and Centripetal Acceleration.
By definition centripetal acceleration is given by
Where,
V = Tangencial velocity
r = radius
With our values we know that
Therefore solving to find V, we have:
For definition we know that the Time to complete are revolution is given by
Answer:
If it points the other way, the fields subtract, for a lower energy, and so the magnet prefers to turn to point in this way. Magnets in uniform fields feel torques which make them turn around if they are not pointing in the right direction, but there is no net force making the magnet want to levitate.
Explanation:
It will be 80 miles and it can be done only in 16 min