Divide the objects mass by its volume. 50.0g / 10.5cm^3 =4.76cm ^3
Explanation:
Given that,
Radius of the circular loop, r = 3.5 cm = 0.035 m
(a) During a 0.12-s time interval, the magnitude of the field increases uniformly from 0.2 T to 0.5 T. Due to the change in the magnetic field, an emf will induced in it. The magnitude of induced emf is given by :
So, the magnitude of the emf induced in the loop during the time interval is 
.
(b) The negative sign shows that the direction of induced emf in the loop is in anitclockwise direction.
Answer:
21.5 m
Explanation:
A car has an initial speed of 31.4 km/hr
Convert to m/s
= 31.4 × 1000/3600
= 31,400/3600
= 8.722 m/s
Acceleration = 1.2 m/s^2
Time= 1.3 seconds.
Therefore the displacement can be calculated as follows
S= 8.722 × 1.3 + 1/2 × 1.2 × 1.3^2
= 11.34 + 1/2 × 20.28
= 11.34 + 10.14
= 21.5 m
Answer: C. Some of uranium's mass is converted into energy, so the smaller atoms have less mass.
Explanation:
From Einstein's mass-energy relation:
E = mc²
Mass and energy are equivalent. Mass can be converted into energy and energy into mass.
When Uranium atoms under go nuclear fission, smaller atoms are formed and huge amount of energy is released. This energy comes from the mass difference of the uranium nuclei and new nuclei formed. This mass converted into energy according to Einstein's equation.
