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A crate is pulled to the right(positive x axis) with a force of 82.0 N, to the left with a force of 115 N, upward with a force of 565 N, and downward with a force of 236 N. Find the magnitude and di
A second order reaction of type A+B=P in which the reactants were present initially at a concentration of 0.02M is found to be 25% completed in 50minutes, calculate the rate constant and the half li
The kinetic energy of the can andd. the gravitational potential energy of the can-earth system 0.200s before the can reaches the ground?
A small, 300 g cart is moving at 1.50 m/s on an air track when it collides with a larger, 2.00 kg cart at rest. After the collision, the small cart recoils at 0.890 m/s. What is the speed of the lar
An experiment shows that a 153-mL gas sample has a mass of 0.171 g at a pressure of 761 mm Hg and a temperature of 32oC. What is the molar mass of the gas? R=0.0821 L atm / mol K.
A rifle is aimed horizontally at a target 45m away. The bullet hits the target 1.5cm below the aim point. what is the time takes and the speed?
At a distance of 4.32 m from a siren, the sound intensity is 3.75 x 10-2 W/m2. Assuming that the siren radiates sound uniformly in all directions, find the total power radiated.
A 375 mL sample of gas is initially at a pressure of 721 torr and a temperature of 32°C. If this gas is compressed to a volume of 286 mL and the pressure increases to 901 torr, what will be the
What minimum force (assumed constant) is needed from the catapult that is used to help launch the jet? Assume that the catapult and the jet's engine each exert a constant force over the 88.9 m dista
Water has a mass per mole of 18.0 g/mol, and each water molecule (H2O) has 10 electrons. (a) How many electrons are there in 3.80 liters of water? (1 liter is equivalent to 1.00 x 10-3 m3) (b) What
A small city requires about 17 of power. Suppose that instead of using high-voltage lines to supply the power, the power is delivered at 120 .Assuming a two-wire line of 0.40 -diameter copper wire,
What is the force vec F on the 1.0{rm nC} charge in the middle of the figure due to the four other charges? Give your answer in component form.
A balloon with an initial volume of 2.3L at a temperature of 279K is warmed to 406K. What is its volume at the final temperature?
The coefficient of kinetic friction between the 50-kg block and incline is 0.250. Determine the change in the kinetic energy of the 50-kg block as it moves from A to B, a distance of 20.0 m.
A 0.33 kg block is located 0.20 m from the center of a turntable. The coefficient of static friction between the block and the surface of the turntable is 0.44. Calculate the maximum angular speed t
Calculate the Debye lengths for 0.1 mM, 10 mM and 100 mM aqueous solutions of NaCl and MgSO4, assuming that the salts are completely ionized .
The bar has mass 60.0 and is 100 in length. The bug jumps off in the horizontal direction, perpendicular to the bar, with a speed of 15.0 relative to the table.
It exhausts the propellant in a 20-s "burn." The rocket moves at 150 m/s after the burn. What average force is experienced by the rocket during the burn?
Three equal point charges, each with charge 1.50 , are placed at the vertices of an equilateral triangle whose sides are of length 0.550 . What is the electric potential energy of the system? (Take
A 60-kg boy and a 40kg girl use an elastic rope while engaging in a tug-o war on an icy frictionless surface. if the acceleration of the girl towards the boy is 3/0m/s squared determing the magnitud
Calculate the number of grams of CoCl2 that would be required to prepare the following solutions:
In unit-vector notation, what is the net magnetic field B at the origin? At what value of y does B = 0? (c) If the current in the wire 1 is reserved, at what value of y does B = 0?"
What is the pressure in a 14.6 L cylinder filled with 0.440mol of nitrogen gas at a temperature of 327K ?
What is the lift (in newtons) due to Bernoulli's principle on a wing of area 88 m2 if the air passes over the top and bottom surfaces at speeds of 280 m/s and 150 m/s, respectively?
In a particular experiment, 1.50-g samples of each reagent are reacted. what is the theoretical yield of lithium nitride ?