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a ferris wheel at a carnival has a radius of 8 meters and rotates once every 15 seconds a 101 scale model of the ferris
a diverging lens with a focal length of -14 cm is placed 11 cm to the right of a converging lens with a focal length of
what fraction of the power radiated by the sun is intercepted by the planet mercury the radius of mercury is 244 x 106
a farsighted woman breaks her current eyeglasses and is using an old pair whose refractive power is 1990 diopters since
an amateur astronomer decides to build a telescope from a discarded pair of eyeglasses one of the lenses has a
suppose a 117times104 kg spaceship left earth at a speed of 090c what is the spaceships kinetic energy compare with the
a lidar laser radar gun is an alternative to the standard radar gun that uses the doppler effect to catch speeders a
a capacitor of capacitance c 4 mc is discharged through a resistor of resistance r 4 k how long will it take for the
a capacitor of capacitance c 6 f is connected in series with a resistor r 5 m to a battery of emf what is the value
suppose in a situation like m1 200g were at the 20-cm position and m2 100g at the 65-cm position would there be a
assume you are a fish you get up every morning and weigh yourself on your scales and find you weight 042n you being a
if you pass current through a standard coiled spring what happens to the spring will it expand as if pulled contract as
in fig 29-56 four long straight wires are perpendicular to the page and their cross sections form a square of edge
an electron decays from the n 4 orbit to the n 1 orbit in the hydrogen atom if the work function of aluminum is 43 ev
a block is placed against the vertical front of a cart what acceleration must the cart have so that ablock a does not
an air conditioner draws 12 a at 220 v ac the connecting cord is copper wire with a diameter of 1450 mma how much power
a charged particle moves through space with constant velocity magnitude and direction if the external magentic field is
you have two 120v light bulbs one 25w and one 100w that are normally connected in parallel with 120v across each your
at a certain location earths magnetic field of 53 microt is horizontal and directed due north suppose the net field is
a boy and a girl are balanced on a massless seesaw the boy has a mass of 75 kg and the girls mass is 50 kg if the boy
the 5106 solar mass black hole at the center of the galaxy may have gained its first million solar masses in the first
a transparent oil with index of refraction 129 spills on the surface of water index of refraction 133 producing a
neurons in our bodies carry weak currents that produce detectable magnetic fields a technique called
a double slit separated by 00572 mm is placed 130 m from a screena if yellow light of wavelength 587 nm strikes the
global warming is a cause for concern because even small changes in the earths temperature can have significant