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An object moving at 13 m/s slows uniformly at the rate of 2.0 m/s each second for a time of 6.0 s. Determine (a) its final speed, (b) its average speed during the 6.0 s, and (c) the distance moved in the 60 s. Ans. (a) 1.0 m/s; (b) 7.0 m/s; (c) 42 m
A conducting cylinder of radius 3.25 cm and length 5.6 cm has a total charge of 4.5 x 10^-9 C distributed uniformly on its surface area. Find the potential at a) its surface, and b) 2.5 cm and c) 5.0 cm from the center of the cylinder.
a car slows down at -5.00m/s squared comes to a stop after 15 m what was the initial speed of the car.
the electrical resistance of the element in a platinum resistance thermometer at 100C, 0C and room temperature 75.000n, 63.000n and 64.000n respectively . determine the room temperature
The length of a pin hole camera 10.1 m. How far is an object 1m high placed from the pin hole for the image to be 0.025 m high.
. The activity of a source was measured as follows
Time/days 0 2 3 4 5
Activity 137 63 44 31 22
The background count was 7
i. Explain background count. How does it occur?
ii. Sketch the above graph and determine the half life of the source.
Discuss Thomson’s atomic model ( what was his proposal on how an atom looks like?).
Explain its failures.
FIND THE MAGNITUDE AND DIRECTION OF THE RESULTANT OF THE GIVEN SET OF VECTORS USING PYTHAGOREAN THEOREM.
VECTOR 1: 12 NEWTONS, SOUTH
VECTOR 2: 10 NEWTONS, WEST
mass of 5 000kg is taking off straight up from the surface of the Earth. How much upwards force do the rockets engine need to produce to cause the rocket to accelerate straight up at 15m/s2?
What is the importance of Microwaves in radio astronomy
