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A sample contains 8.90×104 radioactive nuclei. In a time of 5 minutes, 1.90×103 of the nuclei decay. Evaluate the half life of the sample (in minutes).
Illustrate what is the magnitude of the apparent weight of a 70 astronaut 3600 from the center of the Earth's Moon in a space vehicle moving at constant velocity?
An electron of mass 9.11×10?31kg leaves one end of a TV picture tube with zero initial speed and travels in a straight line to the accelerating grid, Find the net force. (You can ignore the gravitational force on the electron)
A liquid of refractive index 'n' is filled in a beaker of height 'h'. Find the amount by which a coin at its bottom seems to be raised.
A pet-store supply truck moves at 25m/s north along a highway. Inside, a dog moves at 1.85m/s at an angle of 35° east of north. What is the velocity of the dog relative to road.
A 10 g bullet traveling at 430m/s strikes a 13kg , 1.1-m-wide door at the edge opposite the hinge, What is the angular velocity of the door just after impac
A particle moving along the x-axis has its position described by the function x =( 5.00 t3? 3.00 t+ 2.00 )m, what are the particle's position, velocity and acceleration
A Cassegrain astronomical telescope uses two mirrors to form the image. Compute the radius of curvature of a secondary mirror
Suppose the first coil of wire illustrated in the simulation is wound around the iron core 9 times. Find the magnitude of the emf induced in the coil
If the electric field has a magnitude of 450 and the magnetic field has a magnitude of 0.19 , illustrate what speed must the particles have to pass through the selector undeflected?
Two metal cubes, one copper and one aluminum, with sides of length a are arranged as shown, find the thermal resistance of each cubeb
what is the depth d. what is the angle of refraction.
The altitude of a hang glider is increasing at a rate of 6.80 m/s. At the same time, the shadow of the glider moves along the ground at a speed of 15.5 m/s when the sun is directly overhead. Calculate the magnitude of the glider’s velocity.
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