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consider an alternating current of the form it sin2pit where t is the time elapsed measured in seconds a at what times
a 12-kg mass suspended from a spring of spring constant 22 nm-1 executes simple harmonic motion of amplitude 5 cm what
an electric oscillator is made with a capacitor and a 10 mh inductor the capacitor is initially charged to 50 v part a
a diesel engine performs 2200j of mechanical work and discards 4300j of heat each cycle a how much heat must be
suppose a 10 kg mass is hung from the end of a vertical oriented massless spring if the spring stretches 10 cm what is
two coins rotate on a turntable coin b is three times as far from the axis as coin a the mass of coin a is twice the
two air track carts move along an air track one behind the other cart a has a mass of 0450 kg and moves toward the
as a coffee enthusiast you wish to keep your coffee as hot as possible for as long as possible you wish to find the
you have a 855-cm-long copper rod with a rectangular cross section of dimensions 521 cm by 745 cm you maintain the ends
since force is dpdt the force due to radiation pressure reflected off of a solar sail can be calculated as 2 times the
when one mole of c6h6 is burned 327 mj of heat is produced when the heat from burning 777 g of c6h6 is added to 569 kg
a compound microscope has a tube that is 1950 cm long the focus of the eyepiece is 15 cm and the focus of the objective
when brewsters angle of polarized light due to a reflection of light off of the surface of water makes a ray of light
a photon with a wavelength 480pm scatters from an electron initially at resta find the maximum kinetic energy for the
a typical sound level for a buzzing mosquito is35db and that of a vacuum cleaner is approximately 69db approximately
an l-r-c series circuit has c48010-6f l 0500h and source voltage amplitude v 545v the source is operated at the
there is evidence that elephants communicate via infrasound generating rumbling vocalizations as low as 14 hz that can
an outside loudspeaker considered a small source emits sound waves with a power output of125wa find the intensity105m
a putty of mass 006 kg is droppe at height h 1 m above a horizontal rod two 2 kg balls are attached to the ends of the
an orchestra plays a loud symphonic passage at an intensity level of 72db while a very soft solo is only 35db what is
which of the following represents work a compressed spring that is allowed to expand the normal force on a stationary
a hoop is rolling without slipping along a horizontal surface with a speed of 450 ms when it starts up a ramp that
a 44 kg women is in a 62 kg 5 m long boat that is initially at rest she walks from a spot 100 m from one end to a spot
a find the width of the central maximum on a screen located 160 m from the slitb determine the width of the first-order
sucrose which is commonly known as table sugar reacts in dilute acid solutions to form two simpler sugars glucose and