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determine the constant force required to cause the 0.5-kg slider to have a speed at position 2. the slider starts from rest at position 1 and the unstretched length of the spring of modu-lus is 200 mm. neglect friction.
Compare and contrast any two of radio waves,microwave,infrared,visible light,ultraviolet,x-ray and gamma ray in terms of properties.
In your words explain how the theory of light resolves the conflict between newtonian mechanics and maxwell theory
Suppose we experiment with an Atwood machine consisting of two masses m and 2m connected by an inextensible nonslip string running over a pulley of radius a and mass 4m
A)Determine the total kinetic energy of the system. (6marks)
B)Find the gravitational potential energy of the system. (4)
C)briefly discuss why no work is done by the forces of constrait (5)
D)what is the total energy of the system (2)
E)Find the acceleration dv/dt of the blocks
An audio speaker producing a steady sound at an outdoor concert is 18 ft away from you. If you move to a position where the speaker is 67 ft distant, by what factor will the amplitude of the sound change?
Determine the electric flux through a Gaussian surface that contains 87 protons and 73 electrons.
The mercury-in glass thermometer has the ice and steam pint as 6cm and 31cm respectively. Calculate the height of the Mercury when the temperature is 60°
Two point charges are placed as follows: charge q1 = -1.50 nC is at y = +6.00 m and charge q2 = +3.20 nC is at the origin. What is the total force (magnitude and direction) exerted by these two charges on a negative point charge q3 = -5.00 nC located at (2.00 m, -4.00 m)?
A very large, superconducting solenoid such as one used in MRI scans, stores 1.00 MJ of energy in its magnetic field when 100 A flows. (a) Find its self-inductance. (b) If the coils
“go normal,” they gain resistance and start to dissipate thermal energy. What temperature increase is produced if all the stored energy goes into heating the 1000 kg magnet,
given its average specific heat is 200 J/kg·oC ?
A car is stopped at a traffic light. It then travels along a straight road so that its distance
from the light is given by x(t) = bt
2 − ct
3
, where b = 2.40m/s
2
and c = 0.120 m/s
3
.
(a) Calculate the average velocity of the car for the time interval t = 0 to t = 10 seconds.
(b) Calculate the instantaneous velocity of the car at t = 0,t = 5s, and t = 10s.
(c ) How long after starting from rest is the car again at rest?
