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Q. Suppose a heat engine takes in 420 J of energy from a hot reservoir and performs 30 J of work in each cycle.
(i) Find the efficiency of the engine.
(ii) Find the energy expelled to the cold reservoir in each cycle.
A person with perfect pitch sits on a bus bench listening to the 445 Hz horn of an approaching car. If the person detects the frequency of 488 Hz, how fast is the car moving.
A solid cylinder of radius 0.35 m is released from rest from a height of 1.8 m & rolls down the incline as shown. Find the angular speed of the cylinder when it reaches the horizontal surface?
At one instant a bicyclist is 53m due east of a park's flagpole, going due south with a speed of 12m/s. Then 37s later, the cyclist is 53m due north of the flagpole, going due east with a speed of 12m/s. For the cyclist in this 37s interval.
For the polarisers, assume the incident light is linearly polarized, the transmitted intensity (through both polarisers) is 0.15×I0, and the axis of the second polarizer makes an angle θ=41° with the axis of the first polarizer. What is the angle (in..
With what minimum speed should you toss a 140g ball straight up to hit the 11.0m-high roof of the gymnasium if you release the ball 1.30m above the ground? Resolve this problem using energy.
Assuming an electron free Earth. Find the force on a single proton just above Earths surface under these conditions. Compare your answer with the weight of the proton.
A 2.6k and a 1.8k resistor are connected in parallel and this combination is connected in series with a 1.8k resistor. If each resistor is rated at 1/2W, what is the maximum voltage that can be applied across the whole network.
Light of wavelength 588 nm falls on a double slit. First-order bright bands appear 3.65 cm from the central bright band. The screen is 1.20 m from the slits. How far apart are the slits.
Find out vertical and horizontal components of the pendulum
What is the potential difference
Calculate the camel's eastward displacement while he crosses the desert. reply in units of km.
A crate is pulled by a force (parallel to the incline) up a rough incline. The crate has an initial speed of 1.5m/s. The crate is pulled a distance of 7.5 m on the incline by a 150 N force. The acceleration of gravity is 9.8m/s² mu=0.15
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