Diameter is the longest part of the circle that can be measured by taking a line across the middle point of the circle. It's hard to measure diameter accurately because you can't know which was the middle point of the circle. You must draw an imaginary line and if you are missed your calculation will be less than it should be.
The number of turns of wire
Answer:
A. 20 m/s north
Explanation:
The velocity of the car can be calculated as:
where
d is the displacement
t is the time interval
Taking north as positive direction, the initial position of the car is
(south)
while the final position is
(north)
So, the displacement is
(north)
The time interval for the motion is
t = 15 s
So, the velocity of the car is
(north)
The question is asking to calculate the mass of the solid piece if it has a volume of 640cm^3 and a density of 755 kglm, base on that, the answer would be that the mass is 1.18 kg. I hope you are satisfied with my answer and feel free to ask for more