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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?
What is the kinetic energy
A loudspeaker of mass 22 {rm kg} is suspended a distance of h = 2 {rm m} below the ceiling by two cables that make equal angles with the ceiling. Each cable has the length of l = 3.90 {rm m}.
Find out the induced emf in the loop at an instant
Discuss briefly centripetal acceleration, the speed and the force exerted by a ball attached to a string.
What is the speed of the projectile immediately before it hits the ground if air friction does one and a half times as much work on the projectile when it is going down as it did when it was going up.
Compute the coefficient of kinetic friction
David is driving a steady 28.0m/s while he passes Tina, who is sitting in her car at rest. Tina begins to accelerate at a steady 2.70 at the instant when David passes. How far does Tina drive before passing David.
An asteroid is discovered heading straight toward Earth at 13km/s. An international team manages to attach a giant rocket engine to the asteroid. The rocket fires for 10 mins, after which the asteroid is moving at 28 degrees to its original path at a..
The radar system at an airport broadcasts 15 GHz with 150 kW. An approaching airplane with a 34 m^2 cross section is 24km away. Assume that the radar broadcasts uniformly in all directions and that the airplane scatters microwaves uniformly in all di..
Compute the y-component of acceleration
A thin flat plate is installed in a water tunnel as a splitter. The plate is 0.3 m long and 1 m wide. The free stream speed is 1.60 m/s. laminar boundary layers form on both sides of the plate. The boundary-layer velocity profile is approximated as p..
Ultrasound probes can resolve structural details with sizes approximately equal to the wavelength of an ultrasound waves themselves. What is a size of the smallest feature observable in human tissue while examined with 25 MHz ultrasound? The speed of..
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