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Q1. A rocket of mass 3.18 × 10^5 kg is in flight near earth's surface. Its thrust is directed at an angle of 62.2 ° above the horizontal and has a magnitude of 7.40 × 10^6 N. Find (a) magnitude and (b) direction of the rocket's acceleration. Give the direction as an angle above the horizontal.
Q2. Davisson and Germer Experiment
consider a crystal with the atoms arranged in a cubic array, each atom the distance 0.91 °A from its nearest neighbour. Examine the conditions for Bragg reflection from atomic planes connecting diagonally placed atoms.
(a) Find out the longest wavelength electrons that can produce a first-order maximum.
(b)If 300 eV electrons are used, at what angle from crystal normal must they be incident to produce a first order maximum?
Assume a rocketship in deep space moves with constant acceleration equal to 9.8 m/s2, which gives the illusion of normal gravity during the flight. Estimate the time required by a rocketship to attain the speed of light and the distance travelled t..
A copper telephone wire has essentially no sag between poles 20.5 meters apart on a winter day while the temperature is -15.5° C. How much longer is the wire on the summer day when the temperature is 27.0° C.
What is tension in the cord
If you connect these 3 resistors in series across a variable emf source of negligible internal resistance, what is the largest potential difference this emf source can be set to without damaging any of resistors.
Consider a rotational axis at point where the tire contacts the ground, directed vertical to the plane of the paper. Find out the magnitude of the man's force for both designs.
W hat is the magnitude of an average force exerted on the superball by the sidewalk. what is force caused by the water on the bottom.
How many joules of kinetic energy does a 750-{rm kg} automobile travelling at the typical highway speed of 65 {rm{ mi/h}} have.
An Oscilloscope grid is calibrated so that one square represents 1-V vertically and 1 msec horizontally. If the height of a square wave pulse display is 6 squares, the width of the pulse is 7 squares, and the cycle of the wave is 16 squares, the a..
On earth, two parts of a space probe weigh 14000 N and 3500 N. These parts are separated by the center-to-center distance of 8m and may be treated as uniform spherical objects. Find out the magnitude of the gravitational force that each part exerts o..
A 245 ball is tied to a string. It is pulled to an angle of 5.20 and released to swing as a pendulum. A student with a stopwatch finds that 10 oscillations take 10.5.
What is t he steam-side coefficient
Though slow on land, the leatherback turtle holds record for the fastest water speed of any reptile: 9.78 m/s. It is also among the largest of reptiles. Assume the largest leatherback yet discovered were to swim at the top leatherback speed. If its k..
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