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A rocket is fired at 48m/s, in a direction 400 to the horizontal. It explodes in mid air, 4s after the launch. Find the speed of the rocket just before the explosion.(assume that the motion of the rocket is approximately similar to a projectile motion)
What is mechanical energy
You are standing still and watching a spaceship fly past. How fast is the spaceship moving, relative to you
four resistors and a capacitor are connected to an 18 v battery with negligible internal resistance, calculate the net resistance of the circuit
The primary winding of a transformer has 1200 turns, and is connected to 120 V A.C. (r.m.s. value). The secondary has a 25 W load resistor, Continuing, how many turns are in the secondary winding
A frog in a hemispherical bowl finds that he just floats without sinking in a fluid whose density is 1.35 g/cm^3. If the bowl has a radius of 6cm and negligible mass, what is the mass of frog.
An electron (charge -e) is projected horizontally into the space between two oppositely charged parallel plates. The electric field between the plates is 462N/C upward.
An alpha particle (the nucleus of a helium atom formed by 2 protons and 2 neutrons, What would be the force on the alpha particle if it were traveling parallel to the magnetic field lines
A certain type of laser emits light that has a frequency of 5.4 x10^14 Hz. The light, so, occurs as a series of short pulses, each lasting for a time of 2.7 x10-11 s.
A board is 6 meters long. The center of mass is in the 2 meters from the left end. The board has a weight of 320 Newton's. How much force in Newtons is necessary to lift the right end while the other end stays on the ground.
A 12 g bullet is fired horizontally into a 96 g wooden block initially at rest on a horizontal surface. estimate the speed of the bullet
Establish the Force required to raise a 25.50 kg object by 2 pulleys, the diameter of larger circular pulley is 12.0 cm and the smaller pulley is 8.5 cm.
In a television set the power needed to operate the picture tube comes from the secondary of a transformer. Find the turns ratio Ns/Np of the transformer
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