Answer:
The magnitude of the electrostatic force that acts on each sphere is 1.027 N
Explanation:
Given;
distance of separation of the two spheres, r = 0.3 m
number of electrons on the spheres = 2 x 10¹³ e
charges on each sphere, q = 2 x 10¹³ x 1.602 x 10⁻¹⁹ C = 3.204 x 10⁻⁶ C
According to coulomb's law;
where;
F is the electrostatic force between the spheres
K is coulomb's constant = 9 x 10⁹ Nm²/c²
Therefore, the magnitude of the electrostatic force that acts on each sphere is 1.027 N
Answer:
Average velocity = -3.84 m/s
Explanation:
Given the following data;
Initial velocity = 0 m/s
Final velocity = -7.68 m/s
To find the average velocity;
Average velocity = (U + V)/2
Average velocity = (0 + [-7.68])/2
Average velocity = -7.68/2
Average velocity = -3.84 m/s
Therefore, the average velocity of the rock is -3.84 meters per seconds.
Answer:
The star-sphere discovered by the Greeks and other ancient civilizations which shows the physical location in space of the nearby stars.
Explanation:
The celestial sphere is an ideal sphere, without defined radius, concentric with the terrestrial globe, in which the stars apparently move. Some ancient civilizations such as the Greeks assumed that the stars were attached to a celestial sphere, which revolves around the earth, while our planet is always immobile.
Answer:
AN electric current is required for an electric charge
Explanation:
Answer:
A) the maximum acceleration the boulder can have and still get out of the quarry
B) how long does it take to be lifted out at maximum acceleration if it started from rest
Explanation:
A)
let +y is upward. look below at the free body diagram. the mass M refers to the combined mass of the boulder and chain.
the weight of the chain is: and maximum tension is
total mass and weight is :
∑
B)
maximum acceleration
using
to solve for t