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(a) Calculate the electric potential of Q= 25×10^-9 at 1m
(b) Calculate the electric potential of Q= 25×10^-9 at 2m
When a body is completely or partially immersed in a fluid, the fluid experts exterts an upward force on the body equal to the weight of the fluid displaced by the body. Which of the following examples manifest the statement above?
i.submarine
ii.dentist's chair
iii.fish
iv.car lifts
v.hot air balloon
vi.hydraulic jacks
vii.ship
viii.car breaks
Choices:
A)i, iii, v, vii
B)ii, iv, vi, viii
C)i, iii, v, vi
A person pulls on a spring, stretching it 20 cm, which requires a maximum force of
800 N. Find the potential energy stored in the spring when it is stretched 20 cm and
compressed 5 cm.
Inductor as a component in transformer used 10 k resistor. Calculate the maximum
voltage that can be applied to achieve a power of 0.15W
An open cylindrical tank of 20 m high and 30 m in diameter is filled with water. Given
that the atmospheric pressure,
P
=1.013 × 105 N/m2
.
i) Determine the water pressure on the bottom of the tank.
ii) Calculate the total force on the bottom of tank.
A person pulls on a spring, stretching it 15 cm, which requires a maximum force of 750 N. Find the potential energy stored in the spring when it is stretched by 15 cm and compressed by 5 cm.
1. A 1-kg metal sample is heated to 90°C and then dropped into an insulated container containing 200 mL of water at 25°C. When thermal equilibrium is reached, the temperature of water rose to 40°C. Which of the following statements is true after the metal sample is dropped into the beaker?
A 1-kg metal sample is heated to 90°C and then dropped into an insulated container containing 200 mL of water at 25°C. When thermal equilibrium is reached, the temperature of water rose to 40°C. What is the final temperature of the metal sample?
- An object with a mass of 3.50 kg moves in a straight line on a frictionless horizontal surface with a speed of 2.0 m/s. Find the kinetic energy and the net work done on the object to make it reach this speed if it started from rest.
How does the strength of a magnetic field, 1 cm from a current-carrying wire, compare with each of the following. a.) the strength of the field that is 2 cm from the wire. b.) the strength of the field that is 3 cm from the wire.
#340153 on Dec 2023