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The polonium isotope 210Po, an alpha emitter, has a half-life of 138.38 days. You happen to have a 1.4 g cube of 210Po, so you decide to use it to boil water for tea. You fill a well-insulated container with 95 mL of water at 18° C and drop in the cube of polonium. How long will it take to boil the water?
While taking a walk around your neighborhood, you see a flash of lightning hit the Earth in the distance. How far away did the lightning strike the ground
The mass of a space shuttle is approximately 2.0x10^6 kg. Throughout lift-off, the net force on the shuttle is 1.0x10^7 newtons directed upward. What is the speed of the shuttle 10 seconds after liftoff.
What is the tension in the cord in the original situation. A cube of ice is taken from the freezer at -9.3°C and placed in a 95 g aluminum calorimeter filled with 297 g of water at room temperature of 20°C. The final situation is observed to be all..
Calculate the angular velocity? of an electron orbiting a proton in the hydrogen atom, given the radius of the orbit is 0.500x10-10 m . You may assume that the proton is stationary and the centripetal force is supplied by Coulomb attraction.
In a local bar, a customer slides an empty beer mug down the counter for a refill, With what velocity did the mug leave the counter
A 9 ohm resistor are connected in series to a power supply. The voltage drop across the 6 ohm resistor is measured with a amphmeter and found to be 12.0 volts. what is the voltage setting of the power supply
A 50 kg box is being pushed a distance of 7.0 m across the floor by a force whose magnitude is 164 N. The force is parallel to the displacement of the box.
The vertical displacement y(x,t) of a string stretched along the horizontal x-axis is given by y(x,t) = (6.00 mm) cos[(3.25 m-1)x - (7.22 rad/s)t]. What is the distance between adjacent crests of the wave
A cold room has walls constructed of 0.24 m brick on the outside, 0.15 m foam insulation in the middle and 1.6 cm of wood on the inside. Calculate the outside and inside surface temperature of the composite wall
For the arrangement shown in the figure below, an object is placed 0.37 m in front of the converging lens, which has a focal length of 0.17 m. where is the final image formed
An 80 kg person climbs a set of stairs that are 5 meters high. How much gravitational potential energy does she gain
For a location near Norfolk, Virginia at an unspecified time, what is probability that the wind speed will be below 8 meters per second. Use the Weibull Probability Distribution with values C = 6.4 and k = 2.1.
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