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2. A sinusoidal alternating voltage has an r.m.s. value of 200 V and a frequency of 50 Hz. It crosses the zero axis in a positive direction when t = 0
Determine (i) the time when voltage first reaches the instantaneous value of 200 V and (ii) The time when voltage after passing through its maximum positive value reaches the value of 141.4 V.
Ganymede is one of the many moons of Jupiter. Ganymede's period of revolution around Jupiter is 7.16 Earth days and an orbital radius about 1.07x10^9 meter. Find the mass of the Jupiter
The driver of a 2.0 × 103 kg red car traveling on the highway at 45m/s slams on his brakes to avoid striking a second yellow car in front of him, which had come to rest because of blocking ahead as shown in above Fig. After the brakes are applied, a constant friction force of 7.5 × 103 N acts on the car. Ignore air resistance.
(a) Determine the least distance should the brakes be applied to avoid a collision with the other vehicle?
(b) If the distance between the vehicles is initially only 40.0 m, at what speed would the collision occur?
(c) Write your conclusive observations on the result obtained from this numerical. i.e. the importance of Physics in daily life.
Consider an automobile moving at v mph that skids d feet after its brakes lock. Calculate how far it would skid if it was moving at 2v and the brakes were locked.
a Christmas ball in a shape of hollow sphere is hung from the tree by a piece of thread attached to the surface of the ball. the mass and radius of the ball are 0.105kg and 0.12m, respectively what will be its period of oscillation when slightly displaced from its equilibrium position.
The following data were collected during a short race between two friends. Velocity (m/s) 0 0.5 1 1.5 2 2 4 6 2 0 Time (s) 0 2 4 6 8 10 12 14 16 18 a) Describe the different sections of the graph. b) Determine the acceleration over the first eight seconds. c) Determine the maximum acceleration. d) Using the graph calculate the displacement: i) over the first eight seconds ii) the total race. e) Find the maximum velocity reached by the runner.
What is the relationship between distance and height with regards to the coefficient of static friction?
What is the relationship between the Block + Mass and Weight hanger + Mass with regards to coefficient of friction?
Atoms combine to form
A beam of x-ray photon with a wavelength of 0.750 nm strikes a free electron in a sample. The recoiling electron moves away at 1.60 x 106 m/s. a) Determine the Compton shift in the photon’s wavelength. b) Compute the angle through which the photon is scattered.
