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Calculate the value a force must have to keep a 20 kg mass moving up a plane inclined at 34 degrees at a constant speed. Is there an angle for the plane at which no horizontal force can keep the mas
What is the magnitude of the gravitational force due to the sphere on a particle of mass 4.2 kg located at a distance of 69 m from the center of the sphere?
How long (in centimetres) is a single pulse in air? How long is it in water (n = 1.33)? How many wavelengths fit in one pulse? What is the total electromagnetic energy in one pulse?
In what ways would a knowledge of the global wind belts have helped a sixteenth-century explorer sailing between Spain and the northern part of South America?
Two stars are orbiting each other. This is called a binary star system. Star A has a mass of 7.5 x 10^30 kg and star B has a mass of 5.8 x 10^29 kg. The stars are 7.2 x 10^11 m apart.
A 56 g hollow copper cylinder is 10 cm long and has an inner diameter of 1.0 cm. The current density along the length of the cylinder is 1.7x10^5 A/m^2. What is the current in the cylinder?
The air in a laboratory was measured with a barometer to be 7.40x 102 mm Hg. What is the laboratory air pressure in atm?
A common shorthand way to represent a voltaic cell is to list its components as follows: anode/ anode, solution ll cathode, solution/ cathode. A double vertical line represents a salt bridge or poro
What is the age of the piece of wood in years ? The decay rate of carbon-14 in fresh wood today is 13.6 counts per minute per gram, and the half life of carbon-14 is 5730 years.
Comic-strip hero Superman meets an asteroid in outer space, and hurls it at 950 m/s, as fast as a bullet. The asteroid is two thousand times more massive than Superman. In the strip, Superman is see
The element indium (In) is to be obtained by electrolysis of a molten halide of the element. Passage of a current of 3.20 A for a period of 40.0 min results in formation of 4.57 g of indium. W
You are operating an instrument that pulls air through a particle filter at a flow rate of 16.7 L/min (1 m^3/hr). There is animpactor upstream of the filter that removes particles with aerodynamic d
Determine how many CoCl3 formula units can be produced from are action mixture containing 525 cobalt atoms and 525 HCLmolecules according to the following reacton
Weekly samples of wet acid deposition were collected for a 1-month period. Calculate the average pH and determine how many more times acidic the average sample is than a theoretical clear air sampl
If the arm is 5.00 m long and pivots about one end, at what angular speed (in rpm) should it spin so that the acceleration of the lander is the same as the acceleration due to gravity at the surface
Two parallel conducting plates are connected to a constant voltage source. The magnitude of the electric field between the plates is 2,000 N/C. If the voltage is doubled and the distance between the
Ammonia gas combines with excess oxygen gas to produce nitric oxide and water. If 256 kJ of energy were released in such a reaction, how many grams of ammonia gas were reacted?
An electron is in a uniform magnetic field B that is directed out of the plane of the page. When the electron is moving in the plane of the page from the top of the page to the bottom, the force on
Your science fiction writer friend has another harebrained idea. She wants to launch ore mined on the Moon to a processing station in orbit around the Earth. Bins with 1000 kg of ore will be launche
A 2.6 kg block of wood sits on a table. A 3.0g bullet, fired horizontally at a speed of 550m/s , goes completely through the block, emerging at a speed of 250 m/s. What is the speed of the block imm
To obtain water each day , a bird in the winter eats 5.00 g of snow at 0 degree C. How many kilocalories of energy does it take to melt this snow and warm the liquid to the body temperature of the b
Calculate the value a force must have to keep the mass moving up the plane (vertical plane) at a constant speed. Is there an angle for the plane at which no horizontal force can keep the mas moving
The cells used in absorbance measurements are usuallycalibrated so that the pathlength is accurately known and constant for all measurements.
A particle of mass m , initially at rest at x=0, is accelerated by a force that increases in time as F=Ct^2. a) Determine its velocity v as a function of time.
How many revolutions does the electron make along its helical path within the solenoid by the time it emerges from the solenoid by the time it emerges from the solenoid's opposite end?