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A two-stage rocket moves in space at a constant velocity of +4920 m/s. The two stages are then separated by a small explosive charge placed between them. Immediately after the explosion the velocity of the 1200-kg upper stage is +5980 m/s. What is the velocity (magnitude and direction) of the 2020-kg lower stage immediately after the explosion?
In 360 seconds, the amplitude of a spring has dropped to 1/8 its initial value. At what time was it at half its initial value
A point charge of +5.6 µC is placed 0.39 meter from a second point charge of -6.0 µC. Obtain the absolute magnitude of the force on each charge
Two billiard balls undergo a glancing collision. Before the collision the first ball was traveling east at 2.6 m/s, what is the speed of the first ball after the collision
You irradiate some tumor cells with X rays in a pure nitrogen atmosphere and you find that 10% of the cells survive a dose of 8 Gy. In air 90% of these cells die after 3 Gy of X rays. What is the Oxygen Enhancement Ratio for these cells?
The terminals of a 12-V battery are connected to parallel plates. What plate separation would produce an electric field between the plates of 1400 N/C
A conductor bar ab of length 0.6 m is moving on two conductingrails with a speed v = 3.6 m/s perpendicular to a uniform magneticfield of B=0.35 T.
You have a 1200W microwave. When you put a cup of water in for 8 minutes only half evaporates. How eficient is your microwave
A spring with an unstrained length of 0.069 m and a spring constant of 2.7 N/m hangs vertically downward from the ceiling. A uniform electric field directed vertically upward fills the region containing the spring.
An alpha particle is moving at a speed of 5.0 × 105 m/s in a direction perpendicular to a uniform magnetic field of strength 0.040 T. What is the radius of the path of the alpha particle
A coil of wire with 210 circular turns of radius 3.30 cm is in a uniform magnetic field along the axis of the coil. The coil has R= 42.8 ohm. At what rate, in teslas per second, must the magnetic field be changing to induce a current of 0.155 A in th..
Water (density: 10^3 kg/m^3) flows at 15 m/s through a pipe with a raidus of .04m. What is the speed of the water flow of the pipe in the second floor
AN ELECTRIC MOTOR ACCELERATES THE 6-in DIAMETER GRINDING WHEEL AT A RATE 0F 150 rad/s2 FROM REST UNTIL IT REACHES ITS OPERATING SPEED OF 3600 rpm. DETERMINE: The time in seconds required for the wheel to reach 3600rpm
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