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What is the wavelength of an x-ray photon with energy 7.0 kev (7000 ev)? (1 ev = 1.60 × 10−19 joule.)?
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Two charges are located in the x–y plane. if q1 = -3.50 nc and is located at x = 0.00 m, y = 0.800 m and the second charge has magnitude of q2 = 5.00 nc and is located at x = 1.50 m, y = 0.800
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The specific heat of a certain type of cooking oil is 1.75 j/(g·°c). how much heat energy is needed to raise the temperature of 2.94 kg of this oil from 23 °c to 191 °c?
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The mass on a spring is quadrupled. how will this affect the frequency at which the spring will oscillate?
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The ducts of an air heating system pass through an unheated area. as a result of heat losses, the temperature of the air in the duct drops by 3 c. if the mass flow rate of air is 90 kg/min, determine
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Refrigerant r-22 is compressed adiabatically from a saturated vapor at 20 f to a final pressure of 200 psia. determine the minimum work requirement
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Calculate the enthalpy change, δh, for the process in which 10.9 g of water is converted from liquid at 13.8 ∘c to vapor at 25.0 ∘c . for water, δhvap = 44.0 kj/mol at 25.0 ∘c and
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At what distance along the central axis of a uniformly charged plastic disk of radius r = 0.400 m is the magnitude of the electric field equal to 1/5 times the magnitude of the field at the center of
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Astronomers discover a planet orbiting around a star similar to our sun that is 32 light years away. how fast must a rocket ship go if the round trip is to take no longer than 64 years in time for the
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A plastic rod 1.3 m long is rubbed all over with wool, and acquires a charge of -3e-08 coulombs. we choose the center of the rod to be the origin of our coordinate system, with the x-axis extending to
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241Pu decays either by electron decay or by alpha decay. (A given 241Pu nucleus may do either one; is random.) what are the isotopes created as products of these two modes of decay?
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A wire etched onto a computer chip carries a current of 0.000000044 A. In 1.8 milliseconds, how many electrons flow past a point on the wire?
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When a car is 2 0 0 meters from its starting position traveling at 30 . m/s., it starts braking and comes to a stop 350 meters from its starting position in 10 . s. Calculate the acceleration.
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A car is traveling 80km/h is 130m behind a truck traveling at 75km/h. How long will it take the car to reach the truck?
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The wavelength and energy of a wave are inversely proportional. Based on this, which wave listed would have the LOWEST energy. A) wave with wavelength of 600 m B) wave with wavelength of 600 cm C) wav
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An experiment is designed to compare the differences in learning outcomes between learning math from s video game and learning it from traditional classroom activities. the experiment finds no differe
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Suppose that a passenger intent on lunch during his first ride in a hot-air balloon accidently drops an apple over the side during the balloon’s liftoff. At the moment of the apple’s release, the
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The forklift excerts 1500.0 N of force on the boxand moves it 3.00 M forward to the stack. how much work does the forklift do against the force of gravity?
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Forces: What’s Going to Happen? Take a look at this box and the forces acting on it. box with forces acting on it Will the box move, and if so, how will it move? Answer the following questions. 1.
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A hot air balloon of mass 80 kg has a passenger of mass 62 kg. The hot air balloon is at a height of 150m moving at a speed of 18m/s. The total mechanical energy of the balloon and its passenger is __
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An 18-year-old runner can complete a 10.0-km course with an average speed of 4.37 m/s. A 50-year-old runner can cover the same distance with an average speed of 4.19 m/s. How much later (in seconds) s
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Tom pulls a muscle. He has to stop working to get an ice pack. Claudia continues to work and soon finishes her pile. Power is the rate of doing work. It’s calculated by dividing work by time (power
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What magnitude point charge creates a 10,000 N/C electric field at a distance of 0.250m? how large is the field at 10m?
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From the beginning of a life to before death, which is the correct order of stages during the life cycle of a koala? A. fertilization --> birth --> joey in pouch --> joey with mother --> joey on its
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In a model of earths layers that is determined by physical properties how might the atmosphere be classified want to be part of the lithosphere or a separate layer explain your answer
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What amount of heat is required to increase the temperature of 75.0 grams of gold from 150°C to 250°C? The specific heat of gold is 0.13 J/g°C.
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Hich object could she include in her story so the character can see his own face and confirm he has really turned into a mouse
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Suppose that 6 j of work is needed to stretch a spring from its natural length of 24 cm to a length of 36 cm. (a) how much work is needed to stretch the spring from 29 cm to 31 cm? (round your answer
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If the supplied force f = 150 n, determine the velocity of the 50-kg block a when it has risen 3 m, starting from rest.
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Hey! Can someone help with this question? Thx :) What type of energy transformation takes place when carbon is cycled during cellular respiration? A. Chemical energy to chemical energy B. Chemical ene
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A 65.0 kg firefighter climbs 12 flights of stairs that are each 4.0 m high. How much work is required
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The simulation kept track of the variables and automatically recorded data on object displacement, velocity, and momentum. If the trials were run on a real track with real gliders, using stopwatches a
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When a clock reads 4.0 seconds a cart's velocity in the positive x direction is 6.0 m/s. when the clock reads 7.0 seconds, the cart's velocity in the positive x direction is 7.0 m/s. what is the magni
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I NEED THE LAB REPORT PLZ READ CAREFULLY AND WRITE THE LAB REPORT
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Now the table is tilted at an angle of θ = 75° with respect to the vertical. find the magnitude of the new acceleration of block 1.
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If the speed of sound in air is 340 m/s, what is. approximately the length of a shortest air column closed at one end that will respond to a tuning fork of frequency 195 hz? answer in units of cm.
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An airplane starts from rest and accelerates down a runway uniformly at a rate of 4m/s^2 for 36.4s until it takes off. How far did it travel before lifting off the ground ?
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A hot-air balloon is rising upward with a constant speed of 2.13 m/s. When the balloon is 9.12 m above the ground, the balloonist accidentally drops a compass over the side of the balloon. How much ti
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A motorcycle has a constant acceleration of 3.08 m/s2. Both the velocity and acceleration of the motorcycle point in the same direction. How much time is required for the motorcycle to change its spee
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If the number of troughs that pass a point in a given time increases, what has increased? A) wavelength B) frequency C) intensity D) amplitude
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Your father gained 30 n, which caused his chair to break. What was his new mass? How much force was acting on the chair? How much force was reacting
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A large atom decays and emits a particle. After the reaction is complete, the atom’s mass has changed substantially. What kind of particle has most likely been emitted? alpha particle beta particle
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A 15-g ball is shot from a spring gun whose spring has a force constant of 600N/m. The spring can be compressed 5 cm. How high can the ball be shot if the gun is aimed vertically? Use kinetic energy o
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A 15-g ball is shot from a spring gun whose spring has a force constant of 600N/m. The spring can be compressed 5 cm. How high can the ball be shot if the gun is aimed vertically? Use kinetic energy o
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The reason that you can find your way inside your home without the lights on is due to the fact you have a(n)___ map of your physical surroundings
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The 4.5-ft concrete post is reinforced with six steel bars, each with a 11 8-in. diameter. knowing that es 5 29 3 106 psi and ec 5 4.2 3 106 psi, determine the normal stresses in the steel and in the
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Consider two protons (charge +e), separated by a distance of 2.04 x 10-15 m. the electric force between these protons is equal in magnitude to the gravitational force on an object of what mass near th
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A box is on Venus. The box weighs 104 lb and is in free fall. How much force is the box exerting on Venus and in what direction?
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The man attempts to pull down the tree using the cable and small pulley arrangement shown. The tension in AB is 75 lb and γ = 34 ∘
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Two rollerbladers face each other and stand at rest on a flat parking lot. Tracey has a mass of 32 kg, and Jonas has a mass of 45 kg. When they push off against one another, Jonas acquires a speed of