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A gasoline engine has a power output of 185kW (about 248hp ). Its thermal efficiency is 28.5%. How much heat is discarded by the engine per second
A gasoline engine takes in 1.70×10^4J of heat and delivers 3900J of work per cycle. What mass of fuel is burned in each cycle
An electron is a subatomic particle (m = 9.11 10-31 kg) that is subject to electric forces. Find the magnitudes of the net force acting on the electron
A rocket of mass 4.5 105 kg is in flight. Its thrust is directed at an angle of 61.0° above the horizontal, Find the magnitude and direction of the rockets acceleration
A parallel-plate air capacitor has a capacitance of 400pF and a charge of magnitude 0.250uC on each plate. The plates are 0.600mm apart. What is the surface charge density on each plate
On a hot summer day in the state of Washington while kayaking, I saw several swimmers jump from a railroad bridge into the Snohomish River below. How fast were the swimmers moving when they hit the
You have a cup containing 220 g of freshly brewed coffee which, at 75C, is too warm to drink. estimate how much the entropy of the universe increases
Mutual induction can be used as the basis for a metal detector. A typical setup uses two large coils that are parallel to each other , find the new value of the induced emf
At the local swimming hole, a favorite trick is to run horizontally off a cliff that is 6.35 m above the water. find the number of revolutions she makes while on the way down
A jet airplane is in level flight. The mass of the airplane is m = 8870 kg. At what angle is the airplane banked
The coefficient of static friction between m1 and the horizontal surface is 0.60, and the coefficient of kinetic friction is 0.30. what will be the acceleration of the system
Two uniform infinite sheets of electric charge densities 48.0 C/m2, Find the magnitude of the electric field everywhere
A rifle with a mass of 1.76 kg fires a bullet with a mass of 5 g (0.005 kg). The bullet moves with a muzzle velocity of 401 m/s after the rifle is fired. what is the recoil velocity of the rifle
A billiard ball strikes and rebounds from the cushion of a pool table perpendicularly. find the average net force exerted on the all by the cushion
Two point charges q = 63.0 nC and q = -63.0 nC are in vacuum located on the x axis at -46.0 cm and 46.0 cm, calculate the total electric flux through the y-z plane
On a workday the average decibel level of a busy street is 84 dB, with 100 cars passing a given point every minute. what is the decibel level of the street
A low speed wind tunnel has an inlet cross sectional area of 2m2 and a test cross sectional area of 0.5m2. What is the inlet velocity
A hypodermic syringe contains a medicine with the density of water, Determine the medicine's flow speed through the needle
A 28.9-g bullet is fired from a rifle. It takes 3.86 × 10-3 s for the bullet to travel the length of the barrel, find the average net force exerted on the bullet
Water moves through a constricted pipe in steady, ideal flow. At the lower point the pressure is 1.75 105 Pa and the pipe radius is 2.60 cm, Find the speed of flow in the lower section
When a 21.0-V emf device is placed across two resistors in series, a current of 12.0 A is flowing in each of the resistors. determine the magnitude of the larger of the two resistance
A lamp (R = 155 ), an electric heater (R = 27 ), and a fan (R = 51 ) are connected in parallel across a 118 V line. What power is expended in the heater
An athlete executing a long jump leaves the ground at a 34.8 degrees angle and travels 7.86m. how much longer would the jump be
A 24.0 g copper ring at 0.000°C has an inner diameter of D = 2.54000 cm. An aluminum sphere at 103.0°C has a diameter of d = 2.54508 cm. What is the mass of the sphere
A basketball leaves a player's hands at a height of 2.20m above the floor. what is the range of initial speeds allowed to make the basket