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1 a steam engine produces 155 mj of useful work for every 9 kg of coal since coal has a heat of combustion of 31 mjkg
a boat sails from the pier at fishermans wharf in san francisco at 1 ms directly toward alcatraz island a kite rider
1 suppose a bolt of lightning strikes the ground 55 m from where you are standing if the bolt carries 28 ka of current
blue light lamda 440 nm shines onto a puddle of water nwater 133 there is a thin layer of oil noil 147 on top of
a blue laser that operates at a wavelength of 442 nm is directed at a black surface which completely absorbs the beam
a blue cart mass400 kg makes an elastic collision with a red cart mass750 the blue cart is initially moving at 140 ms
the circuit to the right is constructed using 9 identical batteries and 9 identical resistors the lower left corner of
while blowing across the bowl of soup you wonder how efficiently the soup can cool by itself through evaporation you
1 suppose you rotate a 1000 turn 19 cm diameter coil in the earths 500 x 10-5 t magnetic field what is the peak emf
define at least two alternatives to oil that are currently available and discuss the barriers that keep these
you blow up an ordinary party balloon with air until it has a diameter of 6 inches your friend blows up another balloon
a block of wood 34 cm wide and 85 cm tall is placed on a merry-go-round which rotates at 095 rads how far from the
a block slides down a frictionless ramp it starts from the top at rest it is connected to a pulley by a rope that wraps
a block is sitting on a small platform supported by a spring and is undergoing simple harmonic oscillation with an
1 a swimmer is attempting to cross the james river she enters the water and begins paddling at a velocity of 2ms north
a block is resting on a wooden plank there is a hinge on one end of the plank which allows the other end to be lifted
1 the temperature coefficient of resistivity of a wire is 0001 1k the resistance at 300k is 200 ohms the wire is
1 a thin circular hoop with a radius of 032 m is hanging on a nail adam notices that the hoop is oscillating back and
1 three ideal polarizing filters are aligned in succession in the path of a horizontal beam of unpolarized light of
1 three point charges are located at the corners of an equilateral triangle with each side of length l 20 cm a four
1 a tiger leaps horizontally from a 160 m high rock with a speed of 710 ms how far in meters from the base of the rock
1 evaluate the triple integral 0int1 0int20intx z dz dy dx2 evaluateintintintt z dv where t is the solid bounded by z
1a triangular prism with an apex angle ofnbspphi 600o has an index of refraction n 156 what is the smallest angle of
a block of mass m1 5 kg is attached to a spring with a spring constant k 20 nm and rests on a frictionless horizontal
a block of mass m1220 kg slides down a 30 degree incline it mass starts from rest at a position that is 360 m