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Close a door by pushing on the doorknob. Close the door again using approximately the same force but applying it 5 centimeters away from the hinges. Try again by applying the force on the edge of the door in a direction pointing toward the hinges. Summarize and explain your observations. Comment on the difference between force and torque.
A parachutist bails out and freely falls 50 m. Then the parachute opens, and thereafter she decelerates at 1.8 m/s2. At what height does the fall begin
Two conductors having net charges of +12.0 µC and -12.0 µC have a potential difference of 12.0 V between them. Determine the capacitance of the system
You shoot a 47-g pebble straight up with a catapult whose spring constant is 310 N/m. How high above the starting point does the pebble fly
A bottle has a mass of 35.00g when empty and 98.44g when filled with water. When filled with another liquid, the mass is 88.78g. What is the specific gravity of this other fluid
Macaroni and cheese packages specify how long to cook the pasta in boiling water. Calculate the concept relating temperature and pressure in cooking of food.
Two workers are moving a slab of ice (m = 410 kg) across the factory floor. As seen from above, one worker exerts a force of 255 N at an angle of -50o, At what angle does the ice slab accelerate
A sledge loaded with bricks has a total mass of 17.1 kg and is pulled at constant speed by a rope inclined at 19.9° above the horizontal. how much work is the roping doing on the sledge
Two particles of masses m1 and m2 are joined by a massless spring of natural length L and force constant k. Initially, m2 is resting on a table and I am holding m1 vertically above m2 at a height L. At time t=0, I project m1 vertically upward with in..
Recall from thermodynamics that if an object of mass m absorbs an amount of energy Q, its temperature will increase according to Q=mc(Tfinal-Tinitial), where c is th specific heat of the material.
A generator with an rms voltage of 150V is connected in series to a resistor 3.25 kilo-ohm and a capacitor 3.50 microfarad. find the average power consumed by this circuit
A 2.5 kg object is attached to a horizontal spring of force constant k = 4.1 kN/m. The spring is stretched 10 cm from equilibrium and released. Find the maximum acceleration
asssume that in a particular vacuum tube the potential of the anode is 340 V higher than that of the cathode. If an electron leaves the surface of the cathode with zero initial speed, what is its speed when it strikes the anode.
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