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a string is wound tightly around a fixed pulley whose radius is 50 cm as the string is pulled the pulley rotates
a model rocket blasts off from the ground rising straightupward with a constant acceleration thast has a magnitude of
an inductor a capacitor and a 640- resistor are connected in series with an ac generator the generator produces an rms
an electron and a positron annihilate at rest and produce a pair of photons the rest mass energy of the positron and
a laser beam is projected through a diffraction grating which has a slit to slit separation of 2 microm 5000 linescm
a ray of light is refracted from a fluid into glassn16 the incident angle is 40 degrees and the refracted angle is 30
at the bottom of an old mercury-in-glass thermometer is a 37-mm3 reservoir filled with mercury when the thermometer was
a speedboat starts from rest and accelerates at 201 ms2 for 700s at the end of this time the boatcontinues for an
earths radius is 638x106 m and it completes one revolution every day what is the tangential speed of a person standing
calculate how long a de-orbit burn must last in minutes and secondsto achieve the shuttlersquos change in altitude from
a boat crosses a river of width w100m in which the cuerrent has auniform speed of 135 ms the pilot maintains a bearing
a convex lens of focal length 10 cm is placed 40 cm in front of a concave lens of focal length 25 cma small object is
a golf ball is released from rest from a height of 0759 m above the ground and has a collision with the ground for
a disc is rotating about its center a mosquito sits on the disc at a distance of 20 cm from the center and has a linear
a torque of 12 nm is applied to a solid uniform disk of radius 050 m if the disk accelerates at 57 rads2 what is the
a 5kg mass slides along a frictionless surface and strikes another block of mass 3kg which is at rest assume the
in rutherfordrsquosfamous scattering experiment that led to the planetary model of theatom alpha particles having a
on a hot summer day a young girl swings on a rope above the local swimming hole when she lets go of the rope her
residents of hawaii are warned of the approach of a tsunami tidal wave by sirens mounted on the top of towers suppose a
a girl is floating in a freshwater lake with her head just above the water if she weighs 610 n what is the volume of
a solid block is suspended from a spring scale if the reading on the scale when the block is completely immersed in
a 25kg mass hangs by a rope if the tension in the rope is a constant 200n and the initial velocity of the mass is 3ms
for the rl circuits a simple rl circuit let the inductance be 30h the resistance 750 and the battery emf at 36v at t0
a current of 100ma passes through a copper wire for 600sa how many coulombs of charge pass any point in the wire during
a solenoid of length 13 cm consists of a wire wrapped tightly around a wooden core the magnetic field strength is 50 t