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Sunlight strikes the surface of a lake. A diver sees the Sun at an angle of 26.8° with respect to the vertical
A converging lens (f = 12.4 cm) is located 31.8 cm to the left of a diverging lens (f = -5.4 cm). Find the overall magnification
A 7.30 kg bowling ball strikes a 1.60 kg pin at rest head-on. What is the velocity of the pin after the collision
15 points A block of mass 5.00 kg is pushed from a height of 2.00m inside of a frictionless circular hoop of radius 2.00m. What is its speed at the lowest point
Two identical diverging lenses are separated by 17 cm. The focal length of each lens is -5.8 cm. Determine the final image distance relative to the lens
A concave shaving mirror has a focal length of 33 cm. Calculate the image position of a cologne bottle placed in front of the mirror at a distance of 93 cm. how large it is with respect to the objec
an 18-kg groceryi cart is pushed at constant speed along an aisle by a force of 12N. Find the work done by each of the forces on the cart
A 10.0 kg crate slides along a horizontal frictionless surface at a constant speed of 4.0 m/s. What is the speed of the crate when it arrives at the lower surface
A sphere of mass of m = 1.30 kg is first placed directly on the plate of an electronic scale. Calculate the density of the sphere
Construct a dichotomous key diagram with the following species of bacteria using gram stain and morphology?
A kayaker paddles with a power output of 60.0 W to maintain a steady speed of 1.40 m/s, by what factor does the kayaker's speed change
A white billiard ball with mass mw = 1.48 kg is moving directly to the right with a speed of v = 3.05 m/s, what is the final speed of the black ball
A 60 kg bicyclist rides his 9.8 kg bicycle with a speed of 16 m/s. What is the magnitude of the braking force
A 45.2-kg girl is standing on a 143-kg plank. Both originally at rest on a frozen lake that constitutes a frictionless, What is the girls velocity relative to the ice surface
What is the pH of a 0.17 M solution of oxalic acid, H2C2O4. The Ka1,2 values of oxalic acid are 5.6 x 10-2 and 5.4 x 10-5.
How many grams of sodium formate, NaCHO2, would have to be dissolved in 1.1 L of 0.20 M formic acid (pKa 3.74) to make the solution a buffer for pH 3.82
A coil of wire is connected to an ideal 12.0-V battery at t = 0. At t = 14.2 ms, the current in the coil is 210 mA. calculate the inductance of the coil
Calculate the amount of water (in grams) that must be added to each of the following substances to produce the indicated solution 8.10g of urea(NH2)2CO in the preparation of 21.8 percent by mass sol
A novice skier starting from rest slides down a frictionless 32 degree incline whose vertical height is 125 meters
Find the number of moles of water that can be formed if you have 158 mol of hydrogen gas and 74 mol of oxygen gas. Express your answer with the appropriate units.
The initial disappearance of silver nitrate in water indicates a chemical reaction occurred The color change of the solution indicates a chemical reaction occurred A chemical reaction occurred when
Two cylinders each contain 0.30 mol of a diatomic gas at 300 K and a pressure of 3.0 atm. What is the final temperature of the gas in the cylinder A
To keep her dog from running away while she talks to a friend, Susan pulls gently on the dog's leash with a constant force given by F = (2.1 N ) ^x+ (1.5 N )^y, How much work does she do on the dog
The energy diagram shown represents the chemical reaction between solid ammonium chloride and solid barium hydroxide octahydrate: 2NH4Cl(s)+Ba(OH)2 * 8H2O(s)-----2NH3(aq)+BaCl2(aq)+10H2O(l)
What is the Gibbs free energy for this reaction at 5546 ? Assume that and do not change with temperature. At what temperature Teq do the forward and reverse corrosion reactions occur in equilibrium