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In the sum A + B = C, vector A has a magnitude of 11.0 m and is angled 33.5° counterclockwise from the +x direction, and vector C has a magnitude of 15.0 m and is angled 21.5° counterclockwi
After achieving top speed, he runs the remainder of the race without speeding up or slowing down. The total race is fifty meters long. If the total race is run in 7.82 s, how far does he run during
On a day when the speed of sound in air is 340 m/s, a bat emits a shriek whose echo reaches it .025 s later. How far away was the object that reflected back the sound?
A mass is attached to a spring. It oscillates at a frequency of 1.27 Hz when displaced a distance of 2 cm from equilibrium and released. What is the maximum velocity attained by the mass?
To obtain the rate of reaction 3I- (aq) +H3AsO4(aq) +2H+(aq)->I3-(aq)+H2AsO3(aq)+H20(l) you might follow the I- concentration or the I30 concentration.
A women a toddler pushes a chair at a constant speed with a force of 25.0N for a distance of 2.5m. How much work is the child doing on the chair?
Later, the bicyclist climbs the same hill at the same constant speed. How much force (directed parallel to the hill) must be applied to the bicycle in order for the bicyclist to climb the hill?
2 NO(g) +Cl2->2NOCL(g) the observed rate law is Rate= K(NO)^2(Cl2). What is the reaction order with respect to nitrohen monoxide with respect to Cl2? Wht id the overall order?
The magnitude of the car's velocity at the end of stage 2 is 2.8 times greater than it is at the end of stage 1. Find the magnitude of the acceleration in stage 2.
A mass m hanging on a spring has a natural frequency f. If the mass is increased to 4 m, what is the new natural frequency?
A string of linear density 1.5 g/m is under a tension of 20 N. What should its length be if its fundamental resonance frequency is 220 Hz?
The intensity level is 65 dB at a distance 5 m from a barking dog. What would be the intensity level if two identical dogs very close to each other are barking?
A penny is dropped from rest from the top of the Chrysler Building in New York City. Considering that the height of the building is 319 m and ignoring air resistance, find the speed with which the p
Find the concentration of calcium ions in a solution made by adding 3.50 g of calcium fluoride to 750. mL of 0.125 M NaF. [For CaF2, Ksp = 3.95 ? 10-11.]
What is the net ionic equation for the reaction that occurs when small amounts of hydrochloric acid are added to a HOCl/NaOCl buffer solution?
Calculate the number of moles of sodium carbonate present in a mixture of sodium bicarbonate, sodium carbonate and a neutral component if 6.0 ml of 0.100 M HCl were used to titrate 0.200 g of this m
The hydrogen oxalate ion (HC2O4-) is amphiprotic. Write a balanced chemical equation showing how it acts as an acid toward water. Express your answer as a chemical equation.
Write a balanced half-reaction for the reduction of sulfate ion, SO4^2-, to the sulfite ion, SO3^2- in acidic solution. How many elections appear in the balanced half reaction?
The intensity at a distance of 6 m from a source that is radiating equally in all directions is 6.0 X 10-10 W/m2. What is the power emitted by the source?
A mass is attached to a vertical spring and bobs up and down between points A and B. Where is the mass located when its kinetic energy is a minimum?
The frequency of a wave increases. What happens to the distance between successive crests if the speed remains constant?
Consider melting 3.00 moles of material X at 1.00 atm. Assuming that the melting co-existence curve is a straight line, what is X's normal melting temperature?
You can obtain a rough estimate of the size of a molecule by the following simple experiment. Let a droplet of oil spread out on a smooth water surface.
A mass vibrates back and forth from the free end of an ideal spring of spring constant 20 N/m with an amplitude of .3 m. What is the kinetic energy of this vibrating mass when it is .3m from its equ