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A Carnot heat engine has water ice as a cold reservoir and has an efficiency of 70%. The cold reservoir then warms to 100 degrees Celsius. What would the efficiency be now if the hot reservoir stayed at the same temperature?
Lenses
how fast is the mass moving when leaves the spring. What is her velocity relative to the ice surface.
A uniform disk of 10 kg mass and 0.5 m diameter rolls without slipping on a flat horizontal surface. If the velocity of its center is 50 km/h, compute the total kinetic energy of the disk.
Using the equation for the period of a pendulum, determine the period of a pendulum that is 3.0m long, Estimate the spring constant for each of the four springs on a 1260kg car if the static weight of the car causes the springs to compress 10.0cm
the plates of a spherical capacitor have radii 37.0 mm and 49.0 mm.a calculate the capacitance.b what must be the plate
Two small charges with a mass of 1.0 g each are connected by a 2.0 cm long insulating rod of negligible mass. Calculate the magnitude of the torque exerted on the rod by the electric field
a jet with mass m 90000.0 kg jet accelerates down the runway for takeoff at 1.6 ms2. once off the ground the plane
Decide the total minimum work needed to isothermally compress 16 g CO2 at standard ambient temperature and pressure. (SATP 250C and 100 kPa) to the Condition where it is completely liquefied.
A diathermy machine, used in physiotherapy, generateselectromagnetic radiation that gives the effect of "deep heat" whenabsorbed in tissue. What is the wavelength of this radiation
You place 108 moles of hydrogen gas in a balloon of volume 2.3 m3, and find the pressure to be 1.6 times atmospheric pressure. What is the typical speed of a hydrogen molecule?
a square metal plate of edge length 12.0 cm and negligible thickness has a total charge of 7.50times10-6 c. estimate
A 0.66kg mass at the end of a spring vibrates 4.0 times per second with an amplitude of 0.15m. Determine the total energy of the system
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