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A laser light of ! =633 nm shines on a wire and diffraction patterns is found on a screen 1m away. The distance between the first two bright fringes is 8cm find the diameter on the wire.
The ends of the molecule become singly ionized: negative on one end, positive on the other. The helical molecule acts like a spring and compresses 1.27% upon becoming charged. Determine the effectiv
a. How many breaths per minute does a resting person need to take to provide the necessary oxygen? b. How many molecules does a resting person inhale per breath?
Laser light with a wavelength of 670 nm illuminates a pair of slits at normal incidence. What slit separation will produce first-order maxima at angles of plus or minus 35 degrees from the incident
Derive the general expression for the work per kilomole of a van der Walls gas in expanding revesibly and at a constant temperature T from a specific volume V1 to a specific volume V2.
A graduated cylinder contains 18.0 m/L of water. What is the new water level after 35.6 g of silver metal with a density of 10.5 g/mL,is submerged in the water?
The nurse empties the syringe in 2.4 s. What is the flow speed of the medicine through the needle?
The conductor on the stationary train hears a 3.5 Hz beat frequency when the other train approaches. What is the speed of the moving train?
A rope is attached from a truck to a 1466 kg car. The rope will break if the tension is greater than 2381 N. Neglecting friction, what is the maximum possible acceleration of the truck if the rope
Two carts with masses of 4.5 kg and 3.9 kg move toward each other on a frictionless track with speeds of 5.6 m/s and 4.3 m/s, respec- tively. The carts stick together after colliding head-on. Find t
A 140 g copper bowl contains 205 g of water, both at 20.0°C. A very hot 300 g copper cylinder is dropped into the water, causing the water to boil, with 4.95 g being converted to steam. The fin
The final temperature of the system is 100°C. Neglect energy transfers with the environment. (a) How much energy (in calories) is transferred to the water as heat?
A rectangular block of copper has sides of length 5 cm, 17 cm, and 40 cm. If the block is connected to a 4.0 V source across two of its opposite faces of the rectangular block, what are the currents
As it moves along a line connecting it and Earth, observers on Earth measure the wavelength to be 412 nm. What is the sources velocity and direction?
During a workout, the football players at State U. ran up the stadium stairs in 63 s. The stairs are 135 m long and inclined at an angle of 30°. If a typical player has a mass of 105 kg, estima
A weight attached to a wire is swung in a circular path. Its speed is 12 meters/sec, and it has a centripetal acceleration of 9.0 meters/sec2. Calculate the diameter of the circle.
Calculate the magnitude of the gravitational force exerted by Mercury on a 65 kg human standing on the surface of Mercury. (The mass of Mercury is 3.31023 kg and its radius is 2.4106 m.)
A 2.1 x 10^3 kg car starts from rest at the top of a driveway that is sloped at an angle of 20.0 degrees with the horizontal. An average friction force of 4.0 x 10^3 N impedes the car's motion so th
An airplane must reach a speed of 197 mi/h to take off. If the runway is 462 m long, what is the minimum value of the acceleration that will allow the airplane to take off successfully?
The police officer, estimating the coefficient of kinetic friction between tires and road to be 0.80, calculates the speed of the sports car at impact.
What is the freezing point of an aqueous 2.65m calcium chloride (Ca Cl2) solution? the freezing point of pure water is 0.0c and Kf of pure water is 1.86C/m.
You need to use your cell phone, which broadcasts an 800 MHz signal. What is the angular width, in degrees, of the electromagnetic wave after it emerges from between the buildings?
As part of a safety investigation, two 1900 kg cars traveling at 19 m/s are crashed into different barriers. Find the average forces exerted on (a) the car that hits a line of water barrels and tak
A cube of ice is taken from the freezer at -9.3°C and placed in a 95 g aluminum calorimeter filled with 297 g of water at room temperature of 20°C. The final situation is observed to be all
There is a net passage of 6.0 x 1018 electrons by a point in a wire conductor in 0.14 s. What is the current in the wire?