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A heavy object traveling at 100 m/s in the -z direction strikes a very light object that is initially at rest. If the collision is totally elastic, what is the velocity of the light object? (and in
A long solenoid has 1580 turns in a length of 40.0 cm. What current has to flow through the solenoid in order to generate a magnetic field of 3.45 µT in its interior?
What is the minimum photon energy needed to create and e- -e+ pair when a photon collides (a)with a free electron at rest and (b) with a free proton at rest?
Why does an oil-and -vinegar salad dressing have two separate layers? What is meant by the mass/mass percent concentrations of asolution?
A 95g stone hangs at the end of a string 85cm long and is whirled in a horizontal circle. The stone completes one revolution in 0.9s. Find the angle that the string makes with the vertical.
If you add 5.0mL of 0.5 M NaOH solution to 20.0 mL each of Buffer B( initial pH of Buffer B is 3.92), andBuffer C, Which buffer's pH would change less? explain
If 0.330 mol of liquid CS2 and 26.9 g of gaseousO2 are reacted stoichiometrically according to the balanced equation, how many moles of gaseous SO2 are produced?
An X-ray source of unknown wavelength is directed at a carbon sample. An electron is scattered with a speed of 4.5 x 107m/s at an angle of 60o. Determine the wavelength of the X-ray source.
Astronaut Alan Shepard took a golf ball to the Moon. He hit what is thought to be the longest golf drive in history. What speed would an astronaut need to give a lunar golf ball in order to put the
What were the two main pursuits of alchemy? What are the contributions of alchemy to modern chemisty?
A 5.50 x 104-kg space probe is traveling at a speed of 15000 m/s through deep space. Retrorockets are fired along the line of motion to reduce the probe's speed. The retrorockets generate a force of
A campfire is a chemical reaction involving wood and oxygen from the air. In light of the law of conservation of mass, explain what happens to the mass of the wood during the reaction.
Often, the work done is expressed in nutritional Calories rather than in joules. Express the work done in part (a) in terms of nutritional Calories, noting that 1 joule = 2.389 x 10-4 nutritional Ca
When at rest, a proton experiences a net electromagnetic force that has a magnitude of 7.2 x 10-14 N and points in the positive x-direction. When the same proton later moves with a speed of 2.0 x 106
A typical simplest-ratio formula for anthracite coal isC52H16O(s) .The standard enthalpy of formation of anthracite can be estimated at -396.4kJ/mol.
The student has a mass of 74.0 kg, and the height of the water slide is 11.4 m. If the kinetic frictional force does -5.60 x 103 J of work, how fast is the student going at the bottom of the slide?
A sample of nitrogen has a volume of 4.22 L at 1,941 mmHgand 170 °C. What volume will it occupy at standard temperature and pressure?
Suppose the Celsius temperature of an ideal gas is doubled from 100 to 200 . A) Does the average kinetic energy of the molecules in this gas increase by a factor that is greater than, less than, or
Discuss the resonance and inductive effects of a halogenatom with respect to the reactivity of a halobenzene compared to benzene in electrophilic aromatic substitution reactions.
Starting from rest, a 89-kg firefighter slides down a fire pole. The average frictional force exerted on him by the pole has a magnitude of 815 N, and his speed at the bottom of the pole is 3.0 m/s.
Why does the pH change when you add a salt/common ion? What is the effect of adding a strong acid or base to asolution?
A slingshot fires a pebble from the top of a building at a speed of 17.8 m/s. The building is 30.0 m tall. Ignoring air resistance, find the speed with which the pebble strikes the ground when the p
A proton (mass m = 1.67 x 10-27 kg) is being accelerated along a straight line at 2.0 x 1015 m/s2 in a machine. The proton has an initial speed of 2.4 107 m/s and travels 3.1 cm. What is the increase
The initial volume of a sample of argon gas is 552 mL at-97°C. If the pressure is held constant and the volume is changed to 933 mL, what will be the new temperature (in°C)?
A long conducting rod of radius R1 and length L sits inside of a cylindrical shell of radius R2=10(R1) and length L The net charge on the rod is Q and the net charge on the shell is -2Q.