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A 2.71 g sample of KCl from the chemistry stockroom is found to be radioactive, and it is decaying at a constant rate of 4490 Bq. The decays are traced to the element potassium and in particular to the isotope 40K, which constitutes 1.17 % of normal potassium. Calculate the half-life of this nuclide?
Find out the magnitude of the impulse delivered to a soccer ball when a player kicks it with a force of 1350 . Assume that the player's foot is in contact with the ball for 6.00×10-3.
The two organ pipes are joined to form a single organ pipe then it will resonate with what frequency (consider fundamental mode of vibration of organ pipe)
Imagine removing one electron from every atom in a tiny cube of gold 1 mm on a side. (Never mind how you would hold the resulting positively charged cube together.) Do the same thing with another such cube a meter away.
what is the electric potential energy of this particle. what is its speed just before it strikes the positive plate.
A 130 lb subject did 33 lifts/min up a 30 cm step for 5 minutes, what was the work rate, power output and what was the total work done
Consider a balloon being filled up with oxygen. You have approximately 30 moles of oxygen gas in this balloon with volume 1.3 m^3. compute the temperature of the molecules
What should the charge (sign and magnitude) of a particle of mass 1.487 be for it to remain stationary while placed in a downward-directed electric field of magnitude 630.
An ice skater is rotating at 3.4rev/seconds while her arms are beside her. The moment of inertia of the skater is 5kg x m^2. what is her new angular velocity
One particle has a mass of 4.41 x 10-3 kg and a charge of +6.92 ?C. A second particle has a mass of 6.52 x 10-3 kg, Find the initial separation between the particles
A delivery truck travels 32 blocks north, 16 blocks east, and 26 blocks south. Assume the blocks are equal length. Illustrate what is the magnitude of its final displacement from the origin?
At t = 5 s, an object moving on the x-axis at x = 3 m is traveling at 8 m/s i. At t = 9 s, it is at x = 17 m and its velocity is -1 m/s i. Find the average acceleration for this interval
A ball falls straight down onto a wedge that is sitting on frictionless ice. The ball has a mass of 3.11kg, and the wedge has a mass of 5.39 kg. The ball is moving the speed of v = 4.45m/s when it strikes the wedge, which is initially at rest.
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