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A tugboat exerts a constant force of 7.00 103 N on a ship moving at constant speed through a harbor. How much work does the tugboat do on the ship if each moves a distance of 1.00 km?
If the level falls too low, there can be brain damage. If a person has a glucos level of 108 mg.100mL, what is the total mass of glucose in grams in 5.10L of blood?
Calculate the volume of metabolic water available to a camel through fatty acid oxidation if it carries 13.62kg of tricylglycerol in its hump.
The smallest insects that a bat can detect are approximately the size of one wavelength of the sound the bat makes. What is the minimum frequency of sound waves required for the bat to detect an in
An object has a gravitational potential energy of 24 joules when it rests on a shelf 3 m above the ground. What would be its gravitational potential energy when it is lowered to a shelf 1 m above th
Using bond energies calculate the total energy change (Hrxn) for the reaction N2 + 3H2 ! 2NH3 as written (i.e., per 2 moles of ammonia formed).
A ball of mass m moving at speed v0 collides head on with a stationary ball of mass 5m. If the collision is completely inelastic, what is the ratio Kf/Ki of the kinetic energies of the balls before
If a bullet that leaves the muzzle of a gun at 297 m/s is to hit a target 87.0 m away at the level of the muzzle, the gun must be aimed at a point above the target. How far above the target is this
At 35°C, K = 1.6*10^-5 mol/L for the following reaction. Calculate the concentrations of all species at equilibrium for each of the following original mixtures.
Enriching Tower for Benzene-Toluene. An enriching tower is fed 100 kg mol/h of a saturated vapor feed containing 40 mol % benzene (A) and 60 mol % toluene (B) at 101.32 kPa abs. The distillate is to
What is the tangential acceleration of a bug on the rim of a 10 in diameter disk if the disk accelerates uniformly from rest to an angular speed of 87 revolutions per minute in 2.7 s?
Aluminum foil used to package food is approximately 0.0254 mm thick. Assume that all of unit cells of the aluminum are arranged so that ao (unit cell length) is perpendicular to the foil surface. Fo
Mass measurements of the crucible, lid, and sample are performed only at room temperature. Why is the technique necessary for a gravimetric analysis?
A car traveling at 93 km/h strikes a tree. The front end of the car compresses and the driver comes to rest after traveling 0.75 m. What was the average acceleration of the driver during the collis
A magnetic computer disk 8 cm in diameter in initially at rest. a small dot is painted on the edge of the disk. the disk accelerates at 600rad/sec^2 for 1/2 seconds, then coasts at a steady angular
A measurement of the heat produced when a known amount of sugar burns in a constant volume calorimeter would enable us to first calculate the molar Gibbs free energy change for the combustion of sug
Calculate the electric potential due to a dipole whose dipole moment is 5.1×10-30 C*m at a point 1.3×10-9 m away. If this point is along the axis of the dipole nearer the positive charge
A 65-kg swimmer jumps off a 10.0 m tower. The swimmer comes to a stop 2.0 m below the surface. Find the net force exerted by the water.
A water skier is pulled by a net force of 114 N and has an acceleration of 1.9 m/s2. What is the mass of the skier?
The mass of pure and dry BaSO4 precipitated obtained 0.9335g. What is the formula of the zinc sulfate hydrate? name this compound.
At this point she is disappointed at having seen no dolphins and heads straight for Treasure Island. What is the total distance Moe travels from the harbor to the island?
A 50.0 g Super Ball traveling at 28.0 m/s bounces off a brick wall and rebounds at 18.0 m/s. A high-speed camera records this event. If the ball is in contact with the wall for 5 ms, what is the ma
Exactly 1.00 mole of an ideal gas undergoes an iso thermal expansion (T 300 K) from state A to state B. Find the gas's change in entropy for the process BA.
Bonnie and Clyde are sliding 470 kg bank safe across the floor to their getaway car. The safe slides with a constant speed if Clyde pushes from behind with 450 N of force while Bonnie pulls forward
An electric field with a magnitude of 156 N/C exists at a spot that is 0.15 m away from a charge. At a place that is 0.51 m away from this charge, what is the electric field strength?