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There are two stable isotopesof the element Lithium. One of them has three neutrons and the other has four. All other isotopes are radioactive withshort half lives. Using the periodic table in the textbook, find the listed mass of lithium, inamu. Then, using this value, calculate the percentage of the two stable isotopes presentin natural lithium.
You and a friend each drive 67 km to the same destination. You travel at 88.9 km/h and your friend at 98.8 km/h. How long will your friend wait for you at the end of the trip
A fire truck has a siren with that generates a sound with a frequency of 8562 Hz. what frequency will you observe
A 15-kg block rests on a level frictionless surface and is attached by a light string to a 5.0-kg hanging mass where the string passes over a massless frictionless pulley
shelias car is stopped at a traffic light. she is sitting in the car waiting for the light to turn green. suddenly from
On a frictionless table, a glob of clay of mass 0.42 kg strikes a bar of mass 1.98 kg perpendicularly at a point 0.39 m from the center of the bar and sticks to it. At what angular speed does the bar/clay system rotate about its center of mass afte..
A piece of Nichrome wire has a radius of 7.2 x 10-4 m. It is used in a laboratory to make a heater that dissipates 3.30×102 W of power, estimate the necessary length of wire
At an altitude of 260 m above the Earth's surface, the field is only 105 N/C. Calculate the charge density of the air (assumed constant).
On a touchdown attempt, a 95.0 kg running back runs toward the end zone at 3.75 m/s. What are the initial and final kinetic energies of the system
the crate shown is held against wedge b by a spring. the spring is 96.0 of its original uncompressed length l2.75m and
a skateboarder is moving at a constant velocity of 1.75 ms when she starts up an incline that causes her to slow down
Two particles of equal but unknown charge are held 45 cm apart. If their electrostatic repulsion is 2.2 X 10^5 Newtons, what is the magnitude of their charge
A 55.8-kg high-school student hangs from an overhead bar with both hands. What is the tension in each arm when the arms make an angle of 38.00 o with respect to the vertical
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