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A hospital patient has been given 131I (half-life = 8.04 days) which decays at 6.3 times the acceptable level for exposure to the general public. How long must the patient wait to reach the acceptable level? Assume that the material merely decays and is not excreted.
9.3 days
21 days
15 days
10 days
A softball player swings a bat, accelerating it from rest to3.5 rev/s in a time of 0.20 s. compute the torque the player applies to one end of it
A capacitor is connected across an ac source that has voltage amplitude 61.5 and frequency 80.0. What is the phase angle for the source voltage relative to the current
a proton moves vertically upward perpendicular to a uniform magnetic field and deflects to the right as you watch it. What is the direction of the magnetic field
a the harmonic oscillator can be used as a model for the vibrational motion of a diatomic molecule. describe the
An aircraft flying at 100 mph TAS at 5000 ft pressure altitude on a standard day experiences a clogged static port. What is the average velocity around the cockpit
three point charges lie along a straight line where q1 6.00microc q2 1.50microc and q3 -2.00microc. the separation
A 37-kg girl is bouncing on a trampoline. All through a certain interval after she leaves the surface of the trampoline, her kinetic energy decreases to 215 J from 430 J. How high does she rise during this interval? Avoid air resistance.
in a hurricane, the air (density 1.2kg/m3) is blowing over the roof of a house at a speed of 104km/hr. what is the lifting force on the roof of area 100m2
A stone thrown vertically upward with a velocity of 14.3 m/sfrom edge of a cliff 79m high. From its highest point it then fallsall the way to the base of the cliff.
If the Hawaiian hot spot is a fixed hot spot, which of directions is closest to the direction that the Pacific Plate was apparently moving as the Emperor Seamount Chain formed.
Briefly describe: (a) Charging by friction (b) Charging by contact (c) Charging by induction *In one sentence if possible.
Write down the mathematical relationship between velocity (v) and time (t) for a coin tossed up into the air after it leaves the thrower's hand at t=0 with a velocity of +15.0 m/s. Assume that the positive direction is upward and the acceleration of ..
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