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Mars has mass of 6.4 * 10 ^ 26 g and a radius of 3400 km. Phobos has a mass of 1.1 *10 ^19 g and radius of 11 km. Phobos orbits mars with a semimajor axis of 9380 km. What is the mean denisit of Mar
A water-skier is moving at a speed of 14.2 m/s. When she skis in the same direction as a traveling wave, she springs upward every 0.820 s because of the wave crests. When she skis in the direction
A source emits sound uniformly in all directions. A radial line is drawn from this source. On this line, determine the radial positions of two points, 0.782 m apart, such that the intensity level a
The spaceship moves past the Earth with a speed of 0.81c in a direction parallel to the floor of the ship. Find the angle the ladder makes with the floor, as seen by an observer on Earth. in °
A piece of balsa wood with density 0.50g/cm^3 is released under water.What is the initial acceleration?? Repeat for a piece of maple with density 0.750 g/cm^3? Repeat for a ping-pong ball with an a
A parallel-plate capacitor is formed from two 1.0 {rm cm} times 1.0 {rm cm} electrodes spaced 3.0 {rm mm} apart. The electric field strength inside the capacitor is 1.0times10^{6};{rm{N/C}}. What i
61.0-Ω resistor is connected in parallel with a 122.0-Ω resistor. This parallel group is connected in series with a 18.0-Ω resistor. The total combination is connected across a 15
A spaceship and an asteroid are moving in the same direction away from Earth with speeds of 0.83c and 0.39c, respectively. What is the relative speed between the spaceship and the asteroid?
Before throwing a 1.49 kg discus, an ath- lete rotates it along a circular path of radius 1.18 m. The maximum speed of the discuss is 25.2 m/s. Determine the magnitude of its maximum radial accelera
Treating the astronauts as particles, calculate each of the following. The magnitude of the angular momentum of the system?
Optimus Prime is flying straight up at 74 m/s when he accidentally drops his mega-ray blaster and it falls 67 m to the ground below A.) Calculate how LONG it takes for his mega-ray blaster to hit th
A 38.0-kg child swings in a swing supported by two chains, each 3.08 m long. The tension in each chain at the lowest point is 424 N. Find the child's speed at the lowest point.
A system consists of a uniform electric field of 42.6 N/C, directed in the positive x direction. What is the change in the potential energy of the system?
Only two forces act on a 3.1 kg object that moves with an acceleration of 3.3 m/s2 in the positive direction of a y axis. If one of the forces acts in the positive direction of an x axis and has a
Calculate the energy associated with the magnetic field of a 194-turn solenoid in which a current of 2.00 A produces a magnetic flux of 3.74 10-4 T · m2 in each turn.
Assuming the can to be a cylinder with a height of 12 cm and a diameter of 6.6 cm , find the net inward force exerted on the vertical sides of the can due to atmospheric pressure.
What is the instantaneous power, at a time of 0.00700 seconds, dissipated by a 200 ohm resistor in a resonant AC circuit powered by a generator with a 21.0 V maximum potential difference operating
A 9300 kg boxcar traveling at 21 m/s strikes a second boxcar at rest. The two stick together and move off with a speed of 13 m/s. What is the mass of the second car?
David is driving a steady 28.0 {rm m/s} when he passes Tina, who is sitting in her car at rest. Tina begins to accelerate at a steady 2.70 {rm m/s^2} at the instant when David passes.
If the average force exerted on the straw by the tree was 70 N, what was the speed of the straw when it hit the tree?
Find the temperature (in Celsius) at a depth of 35.0 km (near the base of the crust). Ignore the heat generated by the presence of radioactive elements.
An ocean liner leaves New York City and travels 17.0° north of east for 232 km. How far east and how far north has it gone? In other words, what are the magnitudes of the components of the ship
For a damped oscillator with a mass of 170 g, a spring constant 140 N/m and a damping coefficient of 69 g/s, what is the ratio of the amplitude of the damped oscillations to the initial amplitude a
A girl is standing at the edge of a cliff 201 m above the ground. She reaches out over the edge of the cliff and throws a rock straight upward with a speed of 6.17 m/s. a)How long does it take the
A piece of putty of mass m = 0.75 kg and velocity v = 2.5 m/s moves on a horizontal frictionless surface. What fration of the initial kinetic energy of the putty is lost in this collision?