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A biconvex ice lens is made so that the radius of curvature of the front surface is 12.3 cm and that for the back is 20.5 cm. Determine how far you would put dry twigs if you wish to start a fire with your ice lens.
235U loses about 0.1 percent of its mass when it undergoes fission. A. How much energy is released when 1 kg of 235U undergoes fission
A drunk driver in a 2300kg car plows into a 2100kg parked car with its brake set. Police measurements show that the two cars skid together a distance of 20m before stopping. If the effective coefficient of friction is 0.68, how fast was the drunk goi..
A pendulum of length 1.00 m swings in a vertical plane. Whenthe pendulum is in the two horizontal positions Θ =90 andΘ =270, its speed is 5.00 m/s. find the magnitude and direction of the total acceleration
The allowed energies of a simple atom are 0.0 eV, 5.0 eV and 8.0 eV. An electron traveling at a speed of 1.8×10^6 m/s collisionally excites the atom. What is the minimum speed the electron could have after the collision? What is the minimum speed t..
A solid cylinder with mass and radius, rotating with angular speed about an axis throughout its center, is set on the horizontal surface for which the kinetic friction coefficient is.
1 two parallel long wires carry the same current and repel each other with a force f.per unit length. if both these
How much charge can be placed on a capacitor with air between the plates before it breaks down if the area of each plate is 9.00 cm2
An electron is 0.030 m from a proton and has velocity 10 m/s towards the proton. What is the speed of the electron
a. a positive charge is dropped downward into a uniform magnetic field directed into the page. what direction is the
7.125 Steam enters an adiabatic turbine at 7 MPa, 600 degrees C, and 80 m/s and leaves at 50 kPa, 150 degrees C and 140 m/s. If the power output of the turbine is 6 MW, determine (a) the mass flow rate of the steam flowing through the turbine and (b)..
An aircraft uses a rocket-assisted takeoff unit (RATO) that is capable of discharging 47.0 kg of gas in 10.0 s with an exhaust velocity of 1100 m/s. What is the thrust developed by the rocket
A gamma-ray telescope intercepts a pulse of gamma radiation froma magnetar, a type of star with a spectacularly largemagnetic field. The pulse lasts 0.25 s and delivers 7.2 x10-6 J of energy perpendicularly to the94-m2 surface area of the telescope..
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