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A 3.00 g sample of an unknown type of radioactive material has decreased after 2 days to the point that 2.52 g remain. a) what is the half life of this material?
Considering Yukawa's hypothesis that the nuclear force should be due to the exchange of massive particles (that he called mesons), calculate the expected mass of this hypothetical meson.
a swift moving hawk is moving due west with a speed of 30 ms 5.0 s later it is moving due north with a speed of 20 ms.
If the car is now at rest and the pendulum undergoes S.H.M. would its time be shorter of longer than that calculated in (b) explain your answer.
at what temperature will h2 molecules have the same rms speed at o2 molecules have at 20oc? solve this problem without
In short-track speed skating, the track has straight sections and semicircles 16 m in diameter. What is the ratio of this force to the skater's weight
A wind turbine is initially spinning at fix angular speed. As the wind's strength gradually increases, the turbine experiences a constant angular acceleration 0.162 rad/s2. Evaluate the initial angular velocity of the turbine
A 20-m long steel wire (cross-section 1.0 cm2, Young's modulus 2.0 ´ 1011 N/m2), is subjected to a load of 25 000 N. How much will the wire stretch under the load
A hydrogen atom initially in the ground state absorbs a photon, which excites it to the n = 11.0 state. Determine the frequency of the photon
question a ball is tossed so that it bounces off the ground rises to a height of 1.30 m and then hits the ground again
A 16 µF capacitor and a 23 H inductor are connected in series with a 60 Hz source whose rms output is 119 V. Find the voltage drop across the inductor
Two resistors (connected in series with each other) and a 15 V battery are connected in a loop. What is the voltage drop across the second resistor
Consider a simple model for the interior of the Earth: there is a spherical iron core with constant mass density ?0 and radius a; outside the core is "rock" with constant density ?1. Calculate the radius a of the iron core
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