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the noise level in an empty examination hall is 40 db when 100physics students are writing an exam the sounds of heavy
a coin slides over a frictionless plane and across an xy coordinate system from the origin to a point with xy
a piano tuner hears one beat every 216 s when trying to adjust twostrings one of which is sounding 443 hz so that they
a parallel-plate capacitor has circular plates of 680 cm radius and 140 mm separationa calculate the capacitanceb what
the outside mirror on the passenger side of a car is convex and hasa focal length of -76 m relative to thismirror a
when a ceiling fan rotating with an angular speed of 275 rads is turned off a friction torque of 0120 nm slows it to a
a285-kg bucket is attached to a disk-shaped pulley of radius 0121m and mass 0742 kg if the bucket is allowed to fall a
an object is 13 cm in front of a convex mirror whose focal length magnitude is 9 cm what is the magnitude of the
in a diffraction grating experiment lambda 590 nm and the numberof lines per mm in the grating is n 100 how many
a -600 microc charge is moving with a speed of 780104 ms parallel to a very long straightwire the wire is 500 cm from
a helicopter lifts a 81 kg astronaut 17 m vertically from the ocean by means of a cable the acceleration of the
when a 220-kg object is hungvertically on a certain light spring described by hookes law thes pring stretches 311 cma
at one position and time the magnetic field of an em wave invacuum is 100 mt right and its electric filed is 30
a square coil and a rectangular coil are each made from the same length of wire each contains a single turn the long
a linearly-polarized em wave moving in vacuum perpendicular to aperfectly reflecting surface has an intensity of
a convex lens of focal length 5 cm is usedas a magnifying glass at what distance from a tiny insect should you hold
a light ray is incident on the outer surface of the vitreous humor at an angle of 420deg with the normal find the angle
a car was moving on the highway at a speed of 90 kmh the driver then stepped on the gas and started to accelerate
if a real object is placed inside the focal point of a diverging lens the image isvirtual inverted andreducedvirtual
student lifted a 300 kg stone from point 0500m above the floor toa point 175 above the floor and dropped ita calculate
in a certain time period a coil of wire is rotated from oneorientation to another with respect to a uniform 038-t
a bucket filled wwater has a mass of 30kg and is attached to arope that is wound around a cylinder wradius of 50cm at
a car manufacturer claims that you can drive their new vehicle across a hill with a 47 degree slope before the vehicle
two initially uncharged capacitors of capacitance c and2c are connected in series across a battery determinewhether
1 yellow light of vacuum wavelength 589 nm travels at 1942 x108 ms through quartz quartz is a nonmagneticdielectric