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Q1. A 32 percent efficient electric power plant produces 900 MJ of electric energy per second and discharges waste heat into 200C ocean water. Suppose the waste heat could be used to heat homes during the winter instead of being discharged into the ocean. A typical American house requires an average 20 kW for heat in g. How numerous homes could be heated with the waste heat of this one power plant?
Q2. A curve of radius 56 m is banked so that a car of mass 1.8 Mg travelling with uniform speed 51 km/hr can round the curve without relying on friction to keep it from slipping on the surface. At what angle is the curve banked? The acceleration due to gravity is 9.8 m/s2.Answer in units of.
Q3. A 25-cm-long wire with a linear density of 25 passes across the open end of an 83-cm-long open-closed tube of air. If the wire that is fixed at both ends vibrates at its fundamental frequency, sound wave it generates excites the second vibration mode of the tube of air.
A body of mass 200 g is acted upon by a force of 20 n. Find the acceleration of the body. If the body above is having a volume of 1000 cm3 estimate its density in kg/m2.
Find the distance from the origin on the x-axis between the charges where the electric potential due to the two point charges vanishes
A 22.5-kg rock is sliding on a rough, horizontal surface at 9.50 m/s and eventually stops due to friction. What average power is produced by friction as the rock stops
What is a vertical velocity of the ball
A 2.23-m-long rod, as measured in its rest frame, speeds by you longitudinally at 6.11 × 107 m/s. By how many millimeters do you determine the rod has contracted
The maximum speed of a 3.1kg mass attached to a string is 0.68 m/s and the maximum force exerted on the mass is 11N. What is amplitude of motion for the mass? What is the force constant on the string? What the frequency.
A light bulb has a resistance of 230 ?. It is connected to a standard wall socket (120 V rms, 60.0 Hz). Determine the current in the bulb
A high-voltage copper transmission line with a diameter of 2.60 cm and a length of 130 km carries a steady current of 1.03 103 A. what time interval does one electron travel the full length of the line
Two wheels have the same mass and radius of 4.3 kg and 0.50 m, respectively. One has the shape of a hoop, Find the net external torque that acts on each wheel
As a 1240-kg truck travels up a 15.4-m-high hill, the nonconservative forces of friction and the force generated by the engine do work on the truck. determine the change in the truck's kinetic energy
A string is wrapped around a wheel of radius 0.4 m and moment of inertia 25 kg-m2. If the string is pulled with a force of 60 N, what is the angular acceleration of the wheel
Two electrons are fixed 2.1 cm apart. Another electron is shot from infinity and comes to rest midway between the two. What was its initial speed
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