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Evaluate the moment of inertia of a thin rod with axis of rotation at the centre, if its length is 100cm and its mass is 2.3kg
each group of solar cells is arranged in a rectangle 1.2 mx2.8m.the solar cells are situated in a region where 260w of solar energy is recieved per square m of the cells ,the electric output of each group of solar cells is a current of 2.5 with a potential difference of 86v.calculate teh efficency of the solar cells
In a radioactive decay, a nucleus of mass 4.0 × 10-25kg initially at rest emitted an a-particle of mass 6.7 x 10-27kg with a velocity of 1.5 x 107 ms-¹.
a Calculate the velocity of recoil of the nucleus.
b Calculate the kinetic energy of:
1 the recoil nucleus,
ii the o-particle.
A 3-Ω light bulb and a 6-Ω light bulb are connected in series with a 6-volt battery. a) What is the current in each bulb? b) What is the voltage across each bulb? c) What is the power dissipated by each bulb? d) What is the total dissipated by the wire?
A 40-Ω resistor is connected in series to the parallel combination of a 60-Ω resistor and a 30-Ω resistor to form a load a 120-V. Determine the current through and the voltage across each resistor.
In a road accident, a van of mass 1500 kg moving at a speed of 28m * s ^ - 1 ran into the back of a car of mass 900 kg moving in the same direction at a speed of 11m * s ^ - 1 . As a result of the impact, the car was pushed forward at a speed of 18m * s ^ - 1 .
a Calculate the velocity of the van immediately after the impact.
b Calculate:
i the loss of kinetic energy of the van, ii the gain of kinetic energy of the car,
iii the total change of kinetic energy of the two vehicles.
An air column, open at one end, vibrating in its fundamental mode. How long is that air column in wavelength?
- A can is dropped from rest at a height of 40.0 m above ground. How much time does it spend in the bottom half of its fall?
Angelica is pulling her bag at an angle 30° with the horizontal to a distance of 5m . If she exerts a constant force of 50N in pulling her bag, how much work is done
Evaluate the moment of inertia of a thin rod with axis of rotation at the centre , if its length is 100cm and its mass is 2.3kg.
