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Calculate the force required to pull a copper ball of radius 2.50 cm upward through a fluid at the constant speed 9.00 cm/s. Take the drag force to be proportional to the speed; with proportionality constant 0.950 kg/s. ignore the buoyant force.
What is the minimum thickness of coating which should be placed on a lens in order to minimize reflection of 406 nm light? The index of refraction of the coating material is 1.54 and the index of the glass is 1.79.
Three charged particles are fixed to an x axis: Particle 1 of charge q1 = 2.1e-8 C is at position x=20 cm and particle 2 of charge q2 = 2.00q1 is at position x = 30 cm, particle 3 of charge q3 = -4.00q1 is at position x = 70 cm.
In an automatic clothes dryer, a hollow cylinder moves the clothes on a vertical circle (radius r = 0.39 m), as the drawing shows. The appliance is designed so that the clothes tumble gently as they dry.
A submarine is 315 m horizontally out from the shore and 128 m beneath the surface of the water. A laser beam is sent from the submarine so that it strikes the surface of the water at a point 225 m m from the shore. If the beam strikes the top of a b..
Find the resistance of the following. Power ratings are based on the assumption of a potential difference of 120 V, rms across the terminals.
A 2.00 L container is filled with an ideal gas at a temperature of 18.0°C and 1 atm pressure. The container is then heated until the pressure is 3 atm. The volume is held constant. What is the change in the temperature?
A cup of newly brewed 330 g cofee is to hot to drink when served at 88 degree celcisus. What is the mass of the ice cube needed in order to cool the coffee to a pleasant 50 degree celsisus
A 50 turn circular coil of radius 5 cm and resistance 2 ohm is placed in a magnetic field directed perpendicular to the plane of the coil. The magnitude of the magnetic field varies in time according to the expression B=0.01t^2+0.04t^3, where t is in..
A satellite moves in a circular orbit around Earth at a speed of 5929 m/s. Estimate the period of the satellite orbit
q1. a good baseball pitcher can throw a baseball toward home plate at 98 mih with a spin of 1590 revmin. how numerous
question according to the national health survey the heights of adult males in the united states are normally
A car travels at an average speed of 88.0 km/h for 1.00 h and then at an average speed of 40.4 km/h during a second hour. What is the car's average speed through the 2.00 h interval?
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