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A train moving at a constant speed of 100km/h travels east for 40 min, then 30 degree east of north for 20 min, and finally west for 30 min. What is trains average velocity for the trip?
suppose that the springs have somehow not yet compressed to their maximum amount. How much are the springs compressed.
A soccer ball lying on the ground is kicked with an initial velocity of 10.0 m/s at an angle of 37 degrees above the horizontal. How far over does it land on the ground?
A 1.0E-6 F capacitor has a charge of 10.0 microC. It is connected to a 1.0 H inductor at t=0. Which energy is greater
A stationary boat in the ocean is experiencing waves from a storm. The waves move at 55 km/h and have a wavelength of 160 m. The boat is at a crest of a wave.
0.800 x 1010 photons pass through an experimental apparatus. How many of them land in a 0.140-mm-wide strip where the probability density is 15.0 m-1
One of the highest power lasers in the world sits on a table in the General Research Lab Building at Colorado of Donkeys. It emits pulses that last approximately 23.0 fs(10-15 seconds), and contain 95.0 mJ of energy.
A coil of 15 turns and radius 10.0 cm surrounds a long solenoid of radius 2.20 cm and 1.00 x 103 turns/meter. Find the induced emf (in volts) in the 15-turn coil as a function of time
A jet plane at take-off can produce sound of intensity 9.20 W/m^2 at 30.2 m away. What power of sound does the jet produce at take-off
A small but measurable current of 1.5 x 10-10 A exists in a copper wire whose diameter is 2.7 mm. The number of charge carriers per unit volume is 8.49 x 1028m-3. Assuming the current is uniform, Compute the (a) current density and (b) electron drift..
A weather balloon filled with helium gas has a volume of285 m3 and pressure 1.4 x 105 Pa at the Earth's surface (where thetemperature is 293 K). What is the new volume ofthe balloon
you push with a horizontal force of 56.0 against a 25.0 box pressing it against a rough wall to hold it in place. the
Four particles with masses 8 kg, 4 kg, 2kg, and 2kg are connected by rigid rods of negligible mass as shown. calculate the moment of inertia of the system about the z axis
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