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a glass is half-full of water with a layer of vegetable oiln 147 floating on top a ray of light travelingdownward
a molecule of dna deoxyribonucleic acid is 230 microm long the ends of the moleculebecome singly ionized -- negative on
a disk is initially at rest undergoes constant angular acceleration after accelerating for 31 s te disk hasturned to an
four identical charges 29 muc each are brought from infinity and fixed to a straight line each charge is 033 m from the
a river flows due south with a speed of 20ms a man steers aboat across the river his velocity relative to the water is
a typical lightbulb in your house is rated 75 w which means that the bulb dissipates 75 wwhen connected to a dc voltage
a lamp r 147 anelectric heater r 26and a fan r 48 areconnected in parallel across a 115 vlinea what total current
a revolutionary war cannon with a mass of 2270 kg fires a 165 kgball horizontally the cannonball has a speed of 137 ms
how much does the internal energy in joules of a block of metal changenbsp a when 30 cal of heat is added to it and b
a 30 kg block is traveling in the -x direction at 50 ms and a10 kg block is traveling in the x direction at 30 msa find
a sled and rider with a combined weight of 63 kg are at reston the top of a hill 11 m higha what is their total ebergy
a block of mass m 7166 kg is pulled along ahorizontal frictionless surface by a rope of mass m 0470 kg as shown in fig
a pulley with a radius of 30 cm and a rotational inertia of45times10minus3 kg middotm2 is suspended from the ceiling a
in the figure a block slides along a path that is without friction until the block reaches the section of lengthl 0710
am radio signals are broadcast at frequencies between 530 khz and1605 khz kilohertz and travel 30 108 msa what is the
light is emitted from an ordinary lightbulb filament in wave-trainbursts about 10 - 8 rms in duration what is the
a circular saw is powered by a motor when the saw is used to cutwood the wood exerts a torque of 080n middot m on the
a pendulum consists of a 31 kg stone swinging on a 38 m string of negligible mass the stone has a speed of 79 ms when
two blocks are connected by a light weight flexible cord thatpasses over a frictionless pulley if m1 is 37 kg and m2 is
1 a projectile is fired with an initial speed of 1000 ms at anangle of 37o above the horizontal if air resistance is
long thin uniform rod lies motionless in fric free horizontalplane along y-axis its pinned to the ground with a
a converging lens has a focal length of 0060m an object is located 0030 m to the left of this lens a secondconverging
from a distance of 65 m a photographer usesa telephoto lens f 3000 mm to take a picture of acharging rhinoceros how
to focus a camera on objects at different distances the converging lens is moved toward or awayfrom the film so a sharp
the skateboarder in the drawing starts down the left side of the ramp with an initial speed of 385 ms if