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A particular radioactive source produces 175 mrad of 1 MeV gamma rays per hour at a distance of 1.0 meter.
(a) Find how long could a person stand at this distance before accumulating an intolerable dose of 1 rem?
h
(b) Imagine the gamma radiation is emitted uniformly in all directions, determine at what distance would a person receive a dose of 10 mrad/h from this source? m
Ships A and B leave port together. For the next two hours, What is the distance between the two ships two hours after they depart
Two narrow slits are illuminated by monochromatic light. and an interference pattern is observed on a wall. The wall is 6.00m from the slits, the slit separation is 2.00 x 10^-5m and the wavelength is 625nm. Determine the distance between the m=0 and..
A convex spherical mirror with a radius of curvature of 14.5 cm creates a virtual image one half the size of the real object. Where is the object.
a 5.0 kg crate is transferred to a lower level by means of an 8 m long frictionless slide. the height of the top end
A metal cube with sides of length a is moving at velocityv0y^ across a uniform magnetic fieldB0z^. The cube is orientated so that four ofits edges are parallel to its direction of motion (i.e., the normalvector of two faces are parallel to the direct..
A certain lightbulb is rated at 60.0 W when operating at an rmsvoltage of 1.20 x 102 V. (a) What is the peak voltage applied across the bulb? (b) What is the resistance of the bulb?(c) Does a 1.00 x 102 W bulb have greater or lessresistance than a 60..
A 4.0-m-long iron bar of uniform cross section is held perpendicular to the wall by a wire from the end of the bar to the wall, what is the magnitude of the vertical component of force produced by the wall
A hawk flies in a horizontal arc of radius 12 m at a speed of 4 m/s, and increases its speed at the rate of 1.20 m/s2. Find the acceleration (and direction) under these conditions.
If the specific heat of the human body is approximately 0.830 kcal/kg°C and the heat of vaporization of the alcohol is 203 kcal/kg, determine the mass of alcohol necessary to lower the body temperature down to 102°F
A radar for tracking aircraft broadcasts a 12.0GHzmicrowave beam from a 2.00m -diameter circular radar antenna, What is the diameter of the radar beam at a distance of 30.0km
An auto goes from 0 to 30 m/s in 5 s, at a uniform rate of acceleration. The radius of the auto's tires is .33 m. How many revolutions per second are the tires making
A ruby laser emits an intense pulse of light that lasts a mere 30 ns. The light has a wavelength of 690 nm , and each pulse has an energy of 700 mJ. How many photons are emitted in each pulse
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