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A swimmer slides freely from rest from the top of a water slide and reaches the bottom with a horizontal speed. He hits the water 4.6 meters from the slide 0.8 second later. Find the length of the s
A chilled steel rod at 2.00 is placed in the water. If the final temperature of the system is 21.4 , what is the mass of the steel bar?
A reaction at 2.35 atm produces 18.4 L of a gas and evolves 84.1 kJ of heat (exothermic). Calculate the change in internal energy of the system (in kJ)
A 250 gram sample of a metal is warmed from 60 °C to 85 °C when 1000 cal are added. What is the specific heat constant for the metal?
Iron reacts with oxygen in the air to produce rust, Fe2O3, according to the reaction shown below. 4 Fe + 3 O2 → 2 Fe2O3 How many moles of rust can be formed if 1.8 moles of iron are present?
Calculate the difference in pressure between methane and an ideal gas under these conditions. The van der Waals constants for methane are a =2.300 L^2 x atm/mol ^2 and b=0.0430 L/mol.
Having landed on a newly discovered planet, an astronaut sets up a simple pendulum of length 1.17 m and finds that it makes 577 complete oscillations in 1590 s. The amplitude of the oscillations is
The driver of an 2000 kg car traveling at 20.0 m/s slams on the brakes, locking the wheels on the dry pavement. The coefficient of kinetic friction between rubber and dry concrete is typically 0.65
A 2.1 by 10 to the power of 3 kg car starts from rest at the top of a driveway that is sloped at an angle of 20.0 with the horizontal. An average friction force of 4.0 by 10 to the power of 3 N impe
Consider the following covalent bond radii. What is the approximate length of the CN bond in OC(NH2)2 (urea) using the table values?
Find the magnitude and direction of the resultant force, given the vertical component of a force vector is 580 N and the horizontal component is 200 N.
If this particular monoclonal antibody precipitates with its antigen in a 1:1 ratio, how many milligrams of insulin must be added to the reactor per hour to process 100ml of mouse serum per hour.
A vertical electric field of magnitude 1.80x10^4 N/C exits above the Earth's surface on a stormy day. A car with a rectangular size of 5.50m by 2.00m is traveling along the horizontal roadway. Find
To determine the concentration of SO42- ion in a groundwater 100mL of the sample is titrated with 0.0250 M Ba(NO3)2 forming insoluble BaSO4. If 4.51mL of Ba(NO3)2 solution is required to reach the e
A person whose eyes are 1.7m above the floor stands in front of a plane mirror. The top of her head is 0.12m above her eyes. What is the height of the shortest mirror in which she can see her entire
What mass of sodium chloride would need to be added to the blood to bring the sodium ion concentration up to 0.140m, assuming no change in blood volume?
How much energy in kJ is required to heat a calorimeter whose heat capacity is 408.3 J/oC from 23.5oC to 68.1oC?
An engine falls off an airplane at a speed of 280m/s and an altitude of 4500m. What is the horizontal distance the engine will travel before it hits the ground?
A solid ball with a mass of 4.67 kg and a radius of 0.027 m starts from rest at a height of 1.40 m and rolls down a 84.7? slope. What is the translational speed of the ball when it leaves the incline?
General chemistry lab Grand Central equation Should chemists prepare zinc iodide, from its elements or from a double replacement reaction between barium iodide and zinc sulfate?
A loudspeaker of mass 25.0 kg is suspended a distance of h = 1.00 m below the ceiling by two cables that makeequal angles with the ceiling. Each cable has a length of l = 2.90 m. What is the tensio
The length of a string is 532 cm. It is held fixed at each end. The string vibrates in seven sections; i.e., the string has seven antinodes, and the string vibrates at 150 Hz. What is the wavelength
Carbon monoxide is toxic to humans at high concentrations. At an atmospheric pressure of 0.984 atm and temperature of 23°C, what is the partial pressure of CO at the toxic concentrat
The period of oscillation for a mass-on-a-spring system is 0.32 s. If m = 2.9 kg, what is the spring constant of the spring?
A spoon was silver plated electrolytically in a AgNO3 solution. If 0.750g of Ag was deposited on the spoon at a constant current of 20.0mA, how long in hours did the electrolysis take?