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An electron is projected as in fig. 3-10 at a speed of 6.0106 m/s at an angle of 45o ; E = 2.0103 N/C (directed upward), d = 2.0 cm, and l = 10.0 cm. (a) Will the electron strike either of the plates? (b) If it strikes a plate, where does it do so?
A Carnot engine absorbs 1 MJ of heat at 327C and exhausts heat to a reservoir at 127C. How much work does it do?
Let 5.0 cal of heat is added to a particular substance. As a result, its volume changes from 50 to 100 cm3 while the pressure remains constant at 1.0 atm. (a) By how much did the internal energy of the substance? (b) If the mass of the substance is 2.0x10-3 mol, find the molar heat capacity at constant volume. (c) Find the molar heat capacity at constant pressure
A runner of mass 60 kg accelerates at 2.0 m/s² at the start of a race. Calculate the force provided from her legs.
- A warehouse worker moves a crate weighing 100 N vertically a distance of 1.0 m from the floor to a shelf. The worker then slides the crate 3.0 m horizontally along the shelf. Determine the total amount of work exerted on the crate.
a block of wood and a 0.90 kg block of steel are placed in thermal contact while thermally isolated from their surroundings of the the wood was at an initial temperature of 40 degrees the steel was at an initial temperature of 60 degrees and the final equilibrium temperature of the wood and steel was 45 degrees then what was the mass of the block of wood
Over the course of the day you do 1.5Mj of mechanical work and lose 28.5Mj of heat while maintaining a constant body temperature.
What mass of food with an energy content of 50 Mj kg -1 would you need to invest in order to avoid weight loss? (2sf and in kg)
What is the momentum of a 12.2 kg turtle swimming upstream with a speed of 3.3 m/s.
Two men are standing on the same side of a high wall and at the same distance from it such that they are 400 m apart. when one man fires a pistol, the other hears the first report 1.2 s after seeing the flash and the second report 0.5 s after the first. Explain why he hears two reports and calculate the (a) velocity of sound in air (b) perpendicular distance of the men from the wall?
Why does it requires great amount of heat to increase the temperature of 10kg water from 10° to 20°
