Answer:
1.4 * 10 ^-1 Ω
Explanation:
Hi,
For this question, we gotta use the formula
R = pL/A
p = The resistivity of your material at 20°C
L = length of the wire
A = cross-sectional area
The resistivity of tungsten is 5.60 * 10^-8 at 20°C
By plugging the values, we get:
R = (5.60 * 10^-8)(2.0)/(7.9*10^-7) = 1.4 * 10 ^-1 Ω
I don’t understand your question?
Answer:
3.46 s
Explanation:
First of all, we can calculate the acceleration of the elevator by using Newton's second law:
and the acceleration has the same direction of the net force (upward).
Now we can calculate the time takes for the elevator to cover a distance of S=15 m by using the following SUVAT equation:
where a is the acceleration and t the time. Re-arranging the equation, we find
Answer:
The tension in the rope is 262.88 N
Explanation:
Given:
Weight N
Length of rope m
Initial speed of ball
For finding the tension in the rope,
First find the mass of rod,
( )
kg
Tension in the rope is,
N
Therefore, the tension in the rope is 262.88 N
Power (P)= Voltage (V)* Current (I)
So I=P/V=12/9
I=1.3A
*This is a common answer of mine*
Hope this helps.