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A 5 kg block is dragged on a horizontal surface in a circular path of radius 2 m. what is the work done by friction during one turn
A hare and a tortoise compete in a race over a straight course 1.95 km long. The tortoise crawls at a speed of 0.100 m/s toward the finish line. How far is the tortoise from the finish line when the
A point charge of 8.40 mC is surrounded by an equipotential surface with a radius of 0.298 m. What is the electric potential on the surface
Two charged plates create a potential difference of 190 V. At a point halfway between the plates an electron is released from rest. What was the initial speed and direction of the proton
The electric potential difference across the cell membrane of a human cell is 0.080 V, with the higher potential being outside the cell. How much work must be done by the cell to eject the ion
a 15 kg hoop of radius 1 m is spinning at a rate of 4 rotations per second, What is the speed in rotations per minute
A right triangle has a hypotenuse of length 17 cm and a leg of length 15 cm. What is the length of the other leg
A horizontal wire is free to slide on the vertical rails of a conducting frame, what is the terminal speed of the wire
Suppose now that the apparatus is sealed, and the temperature rises to 40.0o C. Find the pressure inside the apparatus now
The esterification reaction of acetic acid with ethanol to give ethyl acetate proceeds with the following stoichiometry: CH3COOH + C2H5OH ----> H20 + CH3COOC2H5.
A series RLC circuit contains an AC generator (120 volts rms, frequency = 60 Hz), a 35.0 ohm resistor, a 1.49×10^?5 F capacitor, Determine the inductive reactance
The reaction of coal with water at high temperatures produces synthesis gas, which is a mixture of carbon monoxide and hydrogen. Use the bond energies in the table below to estimate the enthalpy of
AB and CD are parallel chords of a circle with centre 0. AB is 40 units, CD is 14 units and the distance between AB and CD is 9 waits. If OF is x units, determine, with reasons:
You are holding a compass 3.50 m from a long straight electrical supply wire that is carrying a direct current perpendicularly to the local direction of the Earth's magnetic field. find the magnitud
A BOD test is to be run on a sample of wastewater that has a five-day BOD of 230 mg/L. If the initial DO of a mix of distilled water and wastewater is 8.0 mg/L
A solid ball of radius r=1cm rolls down at an incline of theta =30 deg which is 1 meter high. what is the speed the bottom of the incline
A standard five-day BOD test is run using a mix consisting of four parts distilled water and one part wastewater (no seed). The initial DO of the mix is 9.0 mg/L, and the DO after five days is deter
X-rays of wavelength 0.140 nm are scattered from a crystal, What is the interplanar spacing for this crystal
A Carnot engine has 40 g of Helium gas as its working substance. Calculate the work generated by this engine during one cycle
A photon Compton scatters off of a stationary electron at an angle of 60 °. Determine the initial wavelength of the photon
A cube of ice is taken from the freezer at -8.50C and placed in a 95-g aluminum calorimeter filled with 310 g of water at room temperature of 200C. Find the mass of the ice cube
On a winter day heat leaks out of a house at the rate of 2.5e4 kcal/h. At what rate does this process produce entropy
Calculate the equilibrium constant for this overall reaction: CH3COOH(aq) + IO^-(aq) <=> CH3COO^-(aq) + HIO(aq) K=