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Wavelengths of light from a remote galaxy are found to be 1.5 % longer than the corresponding wavelengths measured here on earth. What is the speed of the galaxy relative to earth
An escaped convict runs 1.70 km due east of the prison. He then runs due north to a friend's house. what is the direction of his total displacement vector with respect to due east
25mL of 0.1545M hydrochloric acid is added to a tablet portion. If it takes 6.38 mL of 0.1567 M sodium hydroxide to titrate the excess hydrochloric acid, how many moles of acid were neutralized by t
A 100-watt lightbulb radiates energy at a rate of 100 J/s.(The watt, a unit of power, or energy over time, is defined as 1 J/s.) If all of the light emitted has a wavelength of 525 nm, how many phot
What was the temperature of the sample after heating. Please show work I've asked this question before and I'm getting mixed answers.
Two cars of 2000 kg each collide head-on while traveling at 75.0 miles per hour. What is the temperature increase of the cars
At 40 degrees celsius the vapor pressure of methyl alcohol is 254 mmHg and at the same temperature the vapor pressure of ethyl alcohol is 135 mmHg.
A rock is tossed straight up with a speed of 29{\rm m}/{\rm s}. What is the rock's velocity as it hits the bottom of the hole
Find the minimum constraint on E such that DDP - Explain why even in this case the DDP problem is solvable
Given the following substitution reaction, what would the effect be of changing the solvent from CH3OH to (CH3)2S=O? CH3(CH2)5Br + NaOH as it goes to CH3(CH2)5OH + Br-
Categorize each of the following as either ionic, covalent, or metallic bonding. 1. Molecular formula= 2. electron sharing= 3. alloy= 4. nonmetal with nonmetal
A variety of different products could be formed in this reaction; for this problem assume all unique products are formed that only 1 Br is present in each alkyl halide product. how many of the poten
You throw a 5-kg ball from a platform releasing the ball at a height of 5 meters with a speed of 10m/s at an angle of 30 degrees with respect to the horixontal. Find the maximum height of the ball a
Your 70kg friend is standing on the outer edge of a merry go round with moment of inertia 695kg*m^2, what will be the new angular velocity
A puck mass m=0.4 kg is sliding on a frictionless surface at a speed v=2.50 m/s in the x direction and I hits another puck o mass m= .2 kg at rest at the origin. what are the final speeds of the par
You throw a 1kg ball out of a window 12 m above the ground. It lands 5 m from the building after 1 s. ignore air resistance, How fast was it traveling when it hit the ground
A 2.85 kg object is held in place on an inclined plane that makes an angle of 40 degrees with the horizontal. Calculate the initial acceleration of the system
(NH4)2Cr2O7(s) ? N2(g) + 4 H2O(g) + Cr2O3(s) If 0.95 g of ammonium dichromate is used and the gases from this reaction are trapped in a 15.0 L flask at 23 °C, what is the total pressure of the g
A heavy sled is being pulled by two people. The coefficient of static friction between the sled and the ground is %u03BCs = 0.579, find the minimum rope tension required to get the sled moving
1. the halide ion from HBr will act as the nucleophile in the first step of the reaction 2. the halide ion will act as the nucleophile in the second step of the reaction
A green photon ( = 551 nm) is absorbed by a free hydrogen atom, initially at rest. What is the recoil speed of the hydrogen atom
A 8.10-kg hanging object is connected by a light, inextensible cord over a light, find the tension in the string
carbon dioxide was allowed to effuse through a small opening under constant pressure conditions. It required 683 s for 1.00 L of this gas to effuse. Calculate the effusion time of ozone (O3) under i
The graph of two cars that collide shows that they intersect at a point 5.5m on a distance/time graph. The first car has a velocity of 0.39m/s. what does the steepness of the slope indicate
What amount of HCl gas must be added to 1 L of a buffer solution that contains [acetic acid]= 2.0 M and [acetate]= 1.0M in order to produce a solution with a pH of 4.26