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ball rolls onto the path of your car as you drive down a quiet neighborhood street. To avoid hitting the child that runs to retrieve the ball, How far did the car move while breaking
On the Apollo 14 mission to the moon, astronaut Alan Shepard hit a golf ball with a golf club improvised from a tool. find How long was the ball in flight
A certain compound is made up of two fluorine atoms, one chlorine atom, and one phosphorus atom. What is the chemical formula of this compound
Two teams of nine members each engage in a tug of war. The first team's members have average masses of 73 kg, What is the acceleration of the two teams
Calculate the pH of 0.099 M phosphoric acid (H3PO4, a triprotic acid). Ka1 = 7.5 x 10-3, Ka2 = 6.2 x 10-8, and Ka3 = 4.8 x 10-13
A box-shaped wood stove has dimensions of 0.75 m x 1.2 m x 0.40 m an emissivity of 0.80, Calculate its rate of radiation into the surrounding space
From a height of 35.5m , a 1.50kg bird dives (from rest) into a small fish tank containing 53.5kg of water. What is the maximum rise in temperature of the water
Calculate the pH of a solution made by adding 24 g of sodium acetate, NaCH3COO, to 26 g of acetic acid, CH3COOH, and dissolving in water to make 200. mL of solution.
The products of the fastest inactivation process-Explain what mechanism is responsible for the formation of the products.
You toss a ball up in the air with an initial velocity of 8 m/s (immediately after leaving your hand). Use gravity = -9.8 m/s2. What is its acceleration at its peak height
In the reaction below, 3.84 atm each of H2 and Cl2 were placed into a 1.00 L flask and allowed to react: H2(g) + Cl2(g) <=> 2 HCl(g) Given that Kc = 62.1, calculate the equilibrium pressure of
How much heat is required to raise the temperature of 0.265kg of water from 20.4 degrees C to 31.8 degrees C
a liter of solution contains .10 mol of Ag+ and .10 mol of Ba+2. if a highly concentrated solution of K2CrO4 is added drop by drop which will precipitate first. Ag2CrO4 or BaCrO4
For a particular scientific experiment, it is important to be completely isolated from any magnetic field, including the earth's field. What is the current in the current loop
benzene ring with a 2 carbonyl joined by an O in the middle and a iso propal group is on the other carbonyl. (would be a symmetric anhydride if it weren't for the benzene and isop-ropral substituent
A 1000-kg car is moving at 30 m/s around a horizontal curve whose radius is 100m. What is the magnitude of the frictional force
A stone is dropped from a cliff; 2.47 s later another stone is thrown downward with an initial speed of 35 m/s. Find the height of the cliff
A natural gas mixture is burned in a furnace at a power-generating station at a rate of 13.0 mol per minute. (a) If the fuel consists of 9.3 mole CH4, 3.1 mole C2H6, 0.40 mol C3H8
A spherical shell of copper with an outer diameter of 19.0 cm floats on fresh water with one third its volume above the water's surface
The density of ma ial at the center of a neutron star is approximately 1.00 x 10^18 kg/m^3. Calculate the mass of a cube
How do you solve this? what formulas do you need? how do you go from n=3 to n=5? what frequency of light is required to cause an electron in the helium ion (He+) to undergo a transition from level n
Beta sheets are a type of secondary structure in proteins. A segment of a single chain in an antiparallel. sheet has a length of 172 Å . How many residues are in this segment
What will have the highest Rf value and which will have the lowest out of naphthalene (non polar), butyric acid (polar), and phenyl acetate (slightly polar) when developed on a silica gel TLC plate
A nuclear power plant operates at 75% of its maximum (Carnot) efficiency between temperatures of 625 degree C, how much exhaust heat is discharged per hour
Calculate the concentrations of all species present [Na+], [C6H5CO2-], [C6H5CO2H], [H3O+] and [OH-] in 0.040M sodium benzoate