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A proton moving with a velocity of 3 × 10^8 ms-1 perpendicularly in a magnetic field strength X T. Given that the force of the proton received is 4.8 × 10^-13 N. Find the value of X.
13.Electron are accelerated in a television tube through a potential difference of 9.8kV. Find the highest frequency and minimum wavelength of the electromagnetic wave emitted, when these strike the screen of the tube. In which region of the spectrum will these lie? a. Differentiate X-rays and visible light in terms of the origin of these EM radiations. b. What voltage must be applied to an X-ray tube for it to emit X-rays with minimum wavelength 0.5 A˚ ?
A person is jumping from a height ℎ0 = 10 m with zero initial velocity and a cricket ball is thrown directly upward with an initial velocity 𝑣𝑣0 = 9.8 m/s at the same instant when time t = 0 s as shown in Fig. 1. Consider h = 11.5 m and 𝚤𝚤̂and 𝚥𝚥̂ to be the unit vectors along the X and Y axis. Gravity is acting along the -𝚥𝚥̂direction and the magnitude of gravitational acceleration is given by g = 9.81 m/s2 . The red dot on the person represents his center of mass. (a) (4 marks) If the person and the cricket ball consist of a system, find the position and velocity of the center of mass of the system at time t = 0.5 s.
(b) (2 marks) If it takes 0.01 seconds for the person to come to complete rest when he hits the ground, calculate the average force acting on the person.
(c) (4 marks) Now consider when the person hits the ground, he bends his knees such that the center of mass of his body is lowered by 15 cm. If the maximum force that the bone of his legs can withstand is 50000 N, will he break his legs?
A cylinder of mass m and radius R has a moment of inertia of 1/2mr^2. The cylinder us released from rest at a height h on an inclined plane, and rolls down the plane without slipping. What is the velocity of the cylinder when it reaches the bottom of the incline?
Find the kinetic, potential, and total energies of the hydrogen atom in the first excited level, and find the wavelength of the photon emitted in the transition from the first excited level to the ground level.
A 400.0-N sign hangs from the end of a uniform strut. The strut is 4.0m long and weighs 600.0 N. The strut is supported by a hinge at the wall and by a cable whose other end is tied to the wall at a point 3.0m above the left end of the strut. Find the tension in supporting cable and the force of the hinge on the strut
A 2 kg oxygen execute an internally reversible process whereby heat is received, causing the total entropy to increase by 1.8 kJ/K for an initial temperature of 90oC. Determine the final temperature if the process is constant volume.
A 0.6 m3 tank contains gas at a pressure of 6800 kPa gage, a temperature of 75oC and mass of 25 kg. A part of this gas was discharged and the temperature and pressure changed to 60oC and 4130 kPa respectively. Heat was applied and the temperature was back to 75oC. Find the final mass, discharged mass, and the final pressure of the gas .
A container having a volume of 0.2 m3 contains Nitrogen at 100 kPa and 150C. If 0.2 kg of Nitrogen is pumped into this container, calculate the final pressure after the gas has returned to its initial temperature.
If 2.83 m3 of atmospheric air (101.3 kPa) at 0oC are compressed to a volume of 0.0283 m3 at a temperature of 76oC, what will be the pressure of the air in kPa.
