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a geiger counter registers a count rate of 4000 counts per minute from sample of a radiosotope twelveminutes later the
a shell is fired from the ground with an initial speed of 156 multiplied by 103 ms at an initial angle of 40deg to the
two equally charged particles are held 2610-3 m apart and then released from restthe initial acceleration of the first
two point charges 430 c and -890 c are separated by 270 m what is the electric potential midway between
sally travels by car from one city to another she drives for 260 min at 740 kmh 440 min at 480 kmh and 130 min at 350
a parallel plate capacitor has a capacitance of 59 f when filled with a dielectric the area of each plate is 13 m2 and
12 volts is applied across a 4 ohm resistor how much power is dissipated by the
an object is released from rest on a planet that has no atmospherenbsp the object falls freely for 3m in the first
a stopped wire 090 m long resonates with a tone whose wavelength is 072 m what is the frequency of this normal mode in
at t0 a ball is thrown upward from the groundnbsp two seconds later the ball hits the groundnbsp assume g10ms2nbsp what
1 a quarterback takes the ball from the line of scrimmage runs backward for 4 yards and then runs sideways parallel to
1 a girl delivering newspapers travels 1 blocks west 2 blocks north and then 6 blocks easta what is her resultant
a high diver of mass 650 kg steps off a board 100 m above the water and falls vertical to the water starting from rest
in order to study the long-term effects of weightlessness astronauts in space must be weighed or at least massed one
a rocket is launched from the surface of the earth with speed 200x104 ms the radius of the earth is re 637x106 m the
a neutron star has a mass of 20 1030 kg about the mass of oursun and a radius of 48 103 m about the height of a
a 10e-6 f capacitor has a charge of 100 microc it is connected to a 10 h inductor at t0 compare the potential energy of
a 1-microf capacitor a 10-ohm resistor and a 1 microh inductor are connected in series with a sinusoidal signal
two loudspeakers 50 m apart are playing the same frequency if you stand 110 m in front of the plane of the
consider the reaction 21h 94begtgtgtgt 73li 42he how much energy is liberated what is the threshold energy for this
it was a dark and storym night when suddenly you saw a flashof lightning three-and-a-half seconds later you heard the
in an experimental radiation therapy an equivalent dose of 0400rem is given to a localized area of tissue with a mass
a very long cylinder with radius a carries uniformly distributed volume charge density rho the electric potential at
the flywheel of a motorhas a mass of 35 kg and a moment ofinertia of 58 kg m2 the motor develops aconstant torque of
1 two infinite lines of charge lie in the x-y-plane parallel to the y-axis line 1 has linear charge density 1 42 cm