Bullet is fired into the bob of a ballistic pendulum
A 15 g bullet is fired into the bob of a ballistic pendulum of mass 1.8 kg. When the bob is at its maximum height, the strings make an angle of 60° with the vertical. The length of the pendulum is 2.3 m. Find the speed of the bullet.
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A 2.7-kg block is traveling to the right (the +x direction) at 5.1 m/s, and a second 2.7-kg block is traveling to the left at 1.8 m/s. (a) Find the total kinetic energy of the two blocks.
The reaction is first order. In an experiment, the initial concentration of cyclobutane was 0.00105M. After heating at 450°C for 455 s, this was reduced to 0.00083 M.
(a) If the two cars collide and stick together their speed just after the collision is (b) What fraction of the initial kinetic energy of the cars is lost during this collision?
Consider the reaction N2 + O2 at equilibriumwith 2NO, for which the Kc =.10 at 2000 degrees C.Starting with the initial concentrations of .040 M of N2and .040 M of O2 determine the equilibrium concentration of NO.
2NaHCO3 at equilibrium Na2CO3 +CO2 + H2O Kp= 0.23 at 100 degreesC. If a sample of NaHCO3 is placed in an evacuated flaskand allowed to achieve equilibrium at 100 degrees C what will the total gas pressure be?
Construct a model that gives the concentration C of the brine after boiling it. (Let x represent the number of liters of water that Sarah boiled off.)
Two resistors are wired in series. The second resistor has twice the resistance as the first. Current passes through the combination. Compared to the current through the first resistor, the current through the second resistor is:
What could this substance have been? And what must have been contaminating the water in the first place to produce this by reacting with bicarbonate of soda?
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