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The Milky Way Galaxy is traveling at 190 km/sec. How many years will it take for it to crash into another planet that is 6 million light years away?
Blue light with a wavelength of 472 is diffracted at 16 by these bands (this is the first-order diffraction) while other wavelengths in the sunlight are diffracted at different angles. What is the s
200 mL sample of lake water is contaminated with a single monoprotic acid. titrating this sample with a .005 M NaOH required 7.3 mL of the NaOH solution to reach the endpoint. what is the concentra
How strong is the electric field between the plates of a 0.60 air-gap capacitor if they are 3.0 apart and each has a charge of 72
Nitrogen gas enters a 0.110-m diameter pipe at 30.0°C, 2.70 atm, and 7.20 m/s. The pipe then rises 26.0 ft and then falls 75.0 ft. The nitrogen gas exits the pipe at 30.0°C and 1.50 atm.
A sledge loaded with bricks has a total mass of 17.6 kg and is pulled at constant speed by a rope inclined at 20.2° above the horizontal. The sledge moves a distance of 20.8 m on a horizontal su
A 2.84g sample of an aqueous ionic salt with a molar mass of 99.37g/mol is added to a calorimeter (Ccal= 72.1J/°C) containing 74.61g of deionized water. The water is initially at 25.780C, after
50.00g of hot water is mixed with 50.00g of cold water Interpolating back to the time of mixing shows that the temperature of the hot water was 44.320C, the temperature of the cold water was 22.780C
(a) Find the total electric potential at the origin. (b) Find the total electric potential at the point having coordinates (1.50 cm, 0).
Why is normal phase chromatography ideal for separating the components (chlorophyll a, b, and carotene) in a petroleum ether spinach extract? (why not reverse phase?)
The circle in the toluene ring is a representation of the composite of two resonance structures. Draw each resonance structure for toluene showing all its H's. What is the molecular formula for tol
How many grams of ice would be melted by the energy obtained as 23.4 g of steam is condensed at 100oC and cooled to 0oC?
Calculate the radius of the sphere that encloses a 50% probability of finding a hydrogen 1s electron. Repeat the calculation for a 90% probability.
A 4.6 g bullet leaves the muzzle of a rifle with a speed of 320 m/s. What force (assumed constant) is exerted on the bullet while it is traveling down the 0.78 m long barrel of the rifle?
The speed of a nerve impulse in the human body is about 100 m/s. If you accidentally stub you toe in the dark, estimate the time it takes the nerve impulse to travel to your brain. (Assume that you
The elevator is moving upward with an acceleration of magnitude 1.4 m/s2. What pressure (in excess of atmospheric pressure) is applied to the floor beneath the suitcase?
What is the magnitude of the largest pushing force that can be applied to the refrigerator before it just begins to move? Assume g = 9.81 m/s2.
A rifle that shoots bullets at 500 m/s is to be aimed at a target 46 m away and level with the rifle. How high above the target must the rifle barrel be pointed so it hits the target?
He was supposed to travel due north for 4.7 km, but when the snow clears, he discovers that he actually traveled 7.8 km at 49° north of due east.In what direction must he travel? (Counterclockwi
A 5.5 -thick layer of oil (n=1.46) is sandwiched between a 1.3 -thick sheet of glass and a 2.3 -thick sheet of polystyrene plastic (n=1.59). How long (in ns) does it take light incident perpendicula
A 100.0 mL sample of a 0.200 molar aqueous solution of K2CrO4 was added to 100.0 mL of a 0.100 molar aqueous solution of BaCl2. The mixture was stirred and the precipitate (BaCrO4) was collected, dr
Some ice cubes at 0 C with a total mass of 331 g are placed in a microwave oven and subjected 750. w (750. j/s) of energy for 5.00 minutes.assume that the energy of the microwave is absorbed by the
What is m4, the mass flow rate of water from the dryer? What is m1, the mass flow rate of aqueous FeSO4 solution entering the crystallizer?
Given the exothermic reaction: N2(g) + 3H2(g) ? 2NH3(g) ?H = -92.1 kJ. At 400 K, the equilibrium constant (Kc) is 0.53. At 800 K, what is the value of the equilibrium constant?
A 35.52g copper coil is removed from boiling water and is immediately immersed in a calorimeter with a constant of 63.2J/0C. The calorimeter contains 74.61g of water that is initially at 21.420C. Th