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A 50 kg woman slides down a waterslide from a height of 30.0 meters, The slide is a straight slope, inclined at 45o with respect to the horizontal.The woman's speed at the bottom of the slide is 22.0
FeS2 (FW = 120) reacts with oxygen to fromFe2O3 (FW = 160) and SO2 (FW =64). What mass of oxygen is required to convert 40 g ofFeS2 into Fe2O3?
By how much should we adjust the mass or length of the pendulum so that the clock keeps correct time ?
If 25.0 Ml of 2.50 M CuSo4 is diluted with water to a final volume of 450 mL, what is the molarity of solute in the resulting solution?
A jar of salsa sits on a wheel that is turning at 22 rpm (revolutions per minute). If the jar sits 41 cm from the center of the wheel, what is the acceleration of the jar?
50mL, 20.0°C of water in the coffee-cup calorimeter. After adding 50mL at 98°C of water to the calorimeter, the temperature have changed to 58°C.
A 21.0 -long wire with a linear density of 30.0 passes across the open end of an 82.0 -long open-closed tube of air. If the wire, which is fixed at both ends, vibrates at its fundamental frequency,
In a certain ride at a carnival, people are rotated in a cylindrically walled room with a radius of 4.8 m, and the rotation frequency is 0.7 revolutions per second when the floor drops out. What is
The atomic mass of radium (Ra, a new radioactive element) was measured by Marie Curie as a part of her Ph.D. research (Radioactive substances, 1903).
When point charges q1 = +3.4 µC and q2 = +2.0 µC are brought near each other, each experiences a repulsive force of magnitude 0.97 N. Determine the distance between the charges.
What must be the minimum initial speed of the dart so that the combination makes a complete circular loop after the collision?
Enough nitrogen must be generated in the bag to create a total pressure of 3.00 atm, which then drops as the bag slowly deflates.
A car can decelerate at -4.00 m/s2 without skidding when stopping on a level road. What would be the magnitude of its deceleration if the road were inclined at 15° uphill?
A solution of diethylamine has a hydroxide ion concentration of 0.012 M. What is the concentration of H + ? I believe diethylamine is (CH3CH2)2NH.
When a 4.32 kg object is hung vertically on a certain light spring that obeys Hooke's Law, the spring stretches 2.92 cm.
A series RC circuit has a time constant of 0.820 s. The battery has an emf of 50.0 V, and the maximum current in the circuit is 480 mA. (a) What is the value of the capacitance(F)? (b) What is the c
A uniform board has a mass of 25 kg and is 4 m long. The board is resting on a fulcrum that is 1.3 m from one end. What mass of brick must be placed on the end of the board so that the board will ba
A tapering telephone pole is 10 m long and has a mass of 300 kg. Its center of gravity is 3m from the thick end. What force must be exerted to hold the thin end off the ground so that the axis of th
A volume of 5.0 L of polluted air at 18.0 degrees celsius and 747mmHg is passed through lime water [an aqueous suspension ofCa(OH)2], so that all the carbon dioxide present is precipitated as CaCO3.
A 11.04lb cat , initially standing one sled , jumps across to the other sled and immediately jumps back to the first sled . For both jumps the cat's speed is 6.2 ft/s relative to the ice. Find the m
Ethyl alcohol, C2H5OH, can be made by the fermentation of glucose,C6H12O6, as indicated by the equation: C6H12O6(aq) ---> 2C2H5OH(aq) + 2CO2(g)
Two parallel wires with centers separated by 8.0 mm each carry 15 A in the opposite direction. Find the magnitude of the force per unit length on each wire.
100 ml of an acid solution and 100 ml of a base solution were combined in a calorimeter. A temperature change of 7.5 degrees c was measured. the density of the final solution was measured to be 1.04
The driver of a 1300-kg car moving at 17 m/s brakes quickly to 11 m/s when he spots a local garage sale. (a.) Find the change in the car's kinetic energy.
Two long parallel wires each carry 2.4 A in the same direction, with their centers 2.0 cm apart. A) Find the magnitude of the magnetic field halfway between the wires.