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A simple pendulum consists of a 4kg mass attached to a 3m long rope. At t=0 it is moving to the right at 0.4m/s. What is the angular frequency of the oscillation
A 1.5 m^3-volume tank holds oxygen gas (M = 32 g/mole) at the pressure of 500,000 Pa. The temperature is 27 C. Find the mass of oxygen in the tank (in kg)
Nitrogen gas may react with hydrogen gas to form hydrazine gas, N2H4, according to the reaction N2 + 2 H2 ---> N2H4. 10 L of N and 25 L H react to completion (the limiting reagent is converted en
Hydrazine (N2H4) and dinitrogen tetroxide ignite on contact to form nitrogen gas and water vapor. How many grams of nitrogen gas form when 1.00 X 102 grams of N2H4 and 2.00 X 102 grams of N2O4 are m
A dry cleaning solvent with a molar mass of 146.99 grams/mole that contains C, H, and Cl is suspected to be a cancer causing agent. When a 0.250 gram sample was studied by combustion analysis, 0.451
A small telescope has a concave mirror with a 4.00-m radius of curvature for its objective. Its eyepiece is a 4.25-cm focal length lens. What is the angle of its telescopic image?
The telescope at a small observatory has objective and eyepiece focal lengths respectively of 20.0 m and 12 cm. determine length of the barrel of the telescope
After filtering off this precipitate, the pH is adjusted to 8 and H2S is again added; no precipitate forms. No precipitate forms upon addition of (NH4)2HPO4. The remaining solution shows a yellow co
As a summer intern for a microscope company, you are designing a compound microscope for a client that provides you with the following information. determine the barrel length needed for the microsc
The magnetic field in a solenoid is B = (µ0NI) / d. A circular wire of radius 10 cm is concentric with a solenoid of radius 7 cm, What is the non-Coulomb electric field in the wire
The speed of sound in air at room temperature is 340 m/s. What is the frequency of a sound wave in air with wavelength 1.3 m
Two slits of equal width are a distance 0.57 mm apart and are illuminated by coherent, mono-chromatic light. compute the widths of the slits
The relationship between angular frequency and wavenumber for a deep water wave is: ?=gk????, what is the group velocity of the wave
A fireworks rocket is launched vertically into the night sky with an initial speed of 40 m/s. find the magnitude and direction of the second piece
A railroad car of mass 2.58 104 kg is moving with a speed of 3.88 m/s. It collides and couples with three other coupled railroad cars, What is the speed of the four cars after the collision
A plastic light pipe has an index of refraction of 1.49. For total internal reflection, what is the minimum angle of incidence if the pipe is in the following media
A certain dry mixture contains only three compounds: silver nitrate ( AgNO3), magnesium chloride (MgCl2), and barium nitrate Ba(NO3)2. When 1.253 g of the mixture was added to excess water, 0.114 g
A 5.00 kg block slides down the inclined plane at 20 angle as shown in the diagram below at a constant velocity. Calculate the net work done by both gravity and friction
The solubility products of PbSO4 and SrSO4 are 6.3 * 10^-7 and 3.2 * 10^-7, respectively. What are the values of [ SO4 2-], [Pb 2+], and [Sr 2+] in a solution at equilibrium with both substances
A beam of polarized light with an average intensity of 18.9 W/m2 is sent through a polarizer. find the rms value of the electric field of the transmitted beam
metal sample weighing 37.6 grams which has been heated to a temperature of 100 degree c in boiling water, was placed in 48.6 grams of water in a calorimeter, the inital temperature of the water was
Two very thick equally-magnetized square plates of side 0.23m and of mass 20 g, are hung by threads 20.0 cm long from a common point. Calculate the magnetic field energy stored between the two plates
Bromocresol green, Ka = 2.0x10^-5, is yellow in its protonated form (HX) and blue in its ionized form (X^-). At what pH will bromocresol green be a perfect green color
A 0.15 M solution of chloroacetic acid has a pH of 1.86 What is the value of Ka for this acid
An x-ray photon with wavelength 15.0 pm is scattered at 84.0 degrees by an electron, find the resulting kinetic energy of the electron