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A 3000-kg spacecraft is in a circularorbit 1200 km above the surfaceof Mars. How much work must the spacecraft engines perform to move the spacecraft to a circular orbit that is 4000 km above the surface?
A half-wave antenna works on the principle that the optimum length of the antenna is half the wavelength of the radiation being received. What is the optimum length of a car antenna when it receives a signal frequency of 94.7 MHz?
A +44 nC charge is placed on the z- axis at (0,0,5 cm). A grounded conducting plane fills the x-y plane where z=0. A) Find the surface charge charge density on the conducting plane at the origin.
A lightbulb operates at a power of 60 watts when connected to a potential difference of 120 volts. In this condition, how many electrons are passing though it per second
a 45.0-kg crate is dragged at constant velocity 8.20-m across a horizontal floor with a rope making a 30 degree angle
A constant force of 23 N pulls on a 12 kg block on a horizontal surface. What is the work done by the constant force
A large block P attached to a light spring executes horizontal, simple harmonic motion as it slides across a frictionless surface with a frequency f 5 1.50 Hz. What maximum amplitude of oscillation can the system have
Find density of the object
A 2.22 kg steel ball strikes a massive wall at 10.4m/s at an angle of alpha = 58.4° with theplane of the wall. It bounces off with the same speed and angle. If the ball is in contact with the wall for 0.204 s, what is the magnitude of the average ..
question a sodium-vapor lamp has power output of 10.0 w. using 589.3 nm as the average wavelength of this source
For a 30 degree launch angle, the initial velocity(v0) is 3.12 m/s, the height at which the launcher is shot from has a height(h) of 1.17 m from the ground, Calculate angle the projectile makes with the horizontal just as projectile hits the ground
A proton is fired directly into a uniform electric field that is able to bring the charge momen- tarily to rest. How much work does the electric field do in stopping the proton
A 3.4-m-tall, 40-cm-diameter concrete column supports a 2.0×105kg load, By how much is the column compressed
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