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A car travels at 35.0 m/s for 40.0 minutes and then travels at 55.0 m/s for 20.0 minutes. What is the average velocity of the car?
A 1.10 kg mass is at the center of a uniform spherical shell of mass 1.09 1020 kg and radius 1.05 106 m. Find the resultant gravitational force on the mass
A piece of copper wire joins a piece of aluminum wire whose diameter is twice that of the copper. The same current flows in both wires, Compare the drift speeds in each
question1a bus travels 330 km south along a straight path with an average velocity of 84 kmh to the south. the bus
q1. a curve of radius 40 m is banked for a design speed of 100 kmh. if the coefficient of static friction is 0.30 wet
A college student renting in a home has a circuit box capable of drawing only 25.0 A before blowing a fuse. With the common wall voltage of 120 V, calculate the maximum power that this home may use
The pitch of the sound from a race car engine drops the musical interval of a tenth when it passes the spectators. How fast is the race car moving
Two very small spheres are initially neutral and separated by a distance of 0.66 m. What is the magnitude of the electrostatic force that acts on each sphere
Suppose a star experiences an outburst in which its surface temperature doubles but its average density, By what factors do the star's radius and luminosity change
a model rocket is shot straight up. shortly running out of fuel, the upward thrust on the rocket is 2 N, calculate the mass of the rocket
An RLC circuit has a reactance, due to its capacitance, of 19 kilo ohms a reactance, due to its inductance, of 10 kilo ohms; and a resistance of 25 kilo ohms
A dolphin in seawater at a temperature of 25 °C emits a sound wave directed toward the ocean floor 246 m below. How much time passes before it hears an echo? (The speed of sound in ocean water is 1533 m/s.)
A vessel which contains an ice-water mixture at 0C is in thermal contact with a water-steam mixture at 100 C. how many grams of ice melts
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