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A radioactive isotope has a half-life of 8.00 min and an initial decay rate of 8000 Bq. Calculate the decay constant. Enter your answer in units 1/s.
A meter stick balances horizontally on a knife-edge at the 50.0 cm mark. With two 5.00 g coins stacked over the 8.0 cm mark, the stick is found to balance at the 43.0 cm mark. What is the mass of the meter stick?
One of the asteroids, asty, looks like an elongated potato. Surprisingly it has a tiny (compared to asty) spherical moon! Find the acceleration of gravity on the surface of this little moon
A block is being pulled by a rope with a force of 24 N. The rope has an angle of theta=20 degrees from the horizontal. The block moves a distance of 11 m. Elucidate what is the work done?
The hot reservoir for a Carnot engine has a temperature of 943 K, while the cold reservoir has a temperature of 495 K. The heat input for this engine is 5280 J. The 495-K reservoir also serves as the hot reservoir for a second Carnot engine.
Is it possible to have a positive position-time graph and a negative velocity-time graph? If so, under what conditions ? What does a curved position-time graph mean?
A rigid rod of mass m3 is povited at point A, and masses m1 and m2 are hanging from it, as shown. Point A L1 m3 L2 m1 m2 (a) What is the normal force acting on the pivot point? (b) What is the ratio of L1 to L2, where these are the distances from the..
Can someone describe the physics behind this problem, the forces involved are confusing A bicyclist coasts down a 6 degree hill at a steady speed of 4.0 m/s. Assuming a total mass of 75kg, what should be the cyclist's power output to climb the simila..
Raindrops are falling straight down at 12 m/s when suddenly the wind starts blowing horizontally at a brisk 4.0 m/s. From your point of view, the rain is now coming down at an angle. What is the angle
A 75.0 kilogram professional diver performs a dive from a platform 10 meter above the water surface. Determine the average impact force she experiences in her collision
It takes 2.43ms for the current in an LR circuit to increase from zero to 0.74 its maximum value. Determine the time constant of the circuit
find the coefficient of kinetic friction between the slide and the child.
Two forces, F1and F2 , act on an object. The magnitude of F1 is 12.45 N, and it is at an angle of 32o above the x-axis in the second quadrant. What are the magnitude and direction of the resultant force
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