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A bicycle rider ( mass of bike and rider is 85kg ) travelling eastat 23ms^-1 changes its velocity to 23ms^-1 south in 5 seconds .
1) calculate the acceleration .2) calculate the change in momentum3)calculate the impulse given to the bike and rider
How many energy is consumed by a 1.10kW hair dryer used for 11.0min and a 10.0W night light left on for 11.0hr
Compute the Brewster’s angle and angle of refraction.
The power of sunlight reaching each square meter of the Earth's surface on a clear day in the tropics is close to 1 000 W. On a winter day in Manitoba, the power concentration of sunlight can be 100 W/m2. Find the power per unit area used by the ca..
Given that the current, natural abundance of U-235 is .72 atom-percent, and neglecting U-234 content of uranium, how long ago was the abundance of U-235 equal to 4 atom-percent?
An unknown nucleus has twice the volume of a nucleus with 83 nucleons. What is the atomic mass number of the unknown nucleus
a non rotation cylyndrical disk of moment of inertia.I is dropped onto an identical disk roating at angular speed w. what is the final common angular speed of the two disks
A sprinter of mass 71.4 kg runs at a constant speed of 11.1 m/s in a straight line. Find the extra force the sprinter must exert on the ground to round a curve of radius 10.3 m
A point mass of 1kg collides elastically with a stationary point mass of 5 kg. calculate total momentum of system and kinetic energy of centre of mass
A student wants to find out the speed of a high-speed projectile, but doesn't have a high-speed measuring device. what is the speed of the projectile just before the collision
How much energy is delivered to the battery. What is the velocity v of the smaller fish before lunch.
Two bodies oscillate in SHM with the same amplitude (7.90 cm), Find the displacement of A when the displacement of B is 7.90 cm
Identical point charges of +2.4 ?C are fixed to diagonally opposite corners of a square. A third charge is then fixed at the center of the square, Find the sign and magnitude of the third charge
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