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While looking through the Mt. Palomar telescope, you discover a large planetary object orbited by a single moon. The moon orbits the planet every 7.60 hours with the centers of the two objects separated by a distance roughly 2.45 times the radius of the planet. Fellow scientists speculate that the planet is made of mostly iron. In fact, the media has dubbed it the \"Iron Planet\" and NASA has even named it Planet Hephaestus after the Greek god of iron. But you have your doubts. Assuming the planet is spherical and the orbit circular, calculate the density of Planet Hephaestus.
An axon is the relatively long tail-like part of a neuron, or nerve cell. The outer surface of the axon membrane is charged positively, Thus, the membrane is a kind of capacitor, what is its capacitance
In an integrated circuit, the current density in a 2.9 ??m?thick× 71 ??m?wide gold film is 7.7×105A/m2, How much charge flows through the film in 15 min
two spaceships are traveling in the same direction. With respect to an inertial frame of reference spaceship A has a speed of 0.850c. Find the speed Vab of spaceship A relative to spaceship B
The magnetic field of the earth at a certain location is directed vertically downward and has a magnitude of 50.0 µT. FIND magnitude of the magnetic force the field exerts on the proton
What is distance of a sample of blood from the rotation axis
You are driving north on 107th Avenue at a speed of 28.7 mph. At what frequency do you year the siren
Consider an AC power supply that provides a voltage of 27sin(119t)volts, where t is in seconds. The power supply is hooked up to a 195 resistor. What is the mean current through the resistor
A planet can have an atmosphere if the escape speed of the planet is 6 times larger than the thermal speed of molecules in the atmosphere. What is the radius of this object's orbit around the sun
Two equal charges Q are positioned at points (x=l, y=0) and (x=-1, y=0).Find where the field is a maximum. define your answer in terms of the variables , , and appropriate constants. If there is more than one answer, separate them by a comma.
A block of mass m = 8 kg is pushed across a rough table with a force applied at an angle of 40 with respect to the horizontal direction, what is the work done by friction
One hundred k mol of a gas containing 94.4 mole% methane, 3.40% ethane, 0.60% propane, and 0.50 percent butane is to be burned with 17% excess air. Calculate the required molar flow rate of the air.
A football is thrown toward a receiver with an initial speed of 20 m/s at an angle of 30.0o above the horizontal. At that instant, receiver is 20 m from the quarterback. In what direction and with what constant speed must the receiver run in order..
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