Step-by-Step Physics Tutorials for Easy Learning

If there has not been a violent crime in the previous minute, what is the probability that there will be a violent crime in the subsequent minute?.
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If vector a = (7.00 i hat -9.00 j) units, vector b = (-9.00 i hat 4.00 j) units, and vector c = (26.0 i hat 22.0 j) units, determine a and b such that a vector a b vector b vector c= 0.
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suppose an arrow is shot upward on the moon with a velocity of 30 m/s, then its height in meters after t seconds is given by h ( t )
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For the configuration given above, what is the DIRECTION of the magnetic field at the center marked x given the value of the current through the first straight wire is 1.5A, the circular loop is 2.0A, and the second straight wire is 1.0A
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A population of fish is exposed to a carcinogen dumped in the lake where they live. Most fish are completely unaffected by the chemical, while a small subset of individuals develop mutations, resulting in large morphologi
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A chain is held on a frictionless table with one-fourth of its length hanging over the edge, as shown in Fig. 12-28. If the chain has a length L and a mass m, how much work is required to pull the hanging part back on the table
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A van is traveling at a speed of 55 km/h. A girl sitting near the driver of the van throws a paper airplane to a boy at the back of the van with a speed of 2 km/h. The speed of the paper airplane, to the nearest whole number relative to the boy, is km/h.
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Cosmic rays are choose one: a. high-energy dark matter. b. high-energy photons. c. a form of electromagnetic radiation. d. high-energy particles.
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a spaceship moves to the right at speed v with respect to the ground. two events occur simultaneously, a distance l apart, in the spaceship frame. what are the time and space separations in the ground frame?
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germicidal lamps are used to sterilize tools in biological and medical facilities. one type of germicidal lamp is a low-pressure mercury discharge tube, similar to a fluorescent lightbulb, that has been optimized to emit ultraviolet light with a wavelength of 254 nm. a 15-mm-diameter, 25-cm-long tube emits 4.5 w of ultraviolet light. the mercury vapor pressure inside the tube is 1.0 pa at the operating temperature of 40c.
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after a long time, the switch in the above circuit is opened, abruptly disconnecting the battery from the circuit. what is the current i through the vertical resistor immediately after the switch is opened? ( is in the direction of the arrow)
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A car starts from rest accelerates uniformly and after a speed of 80m/s in 15sec. it then maintain this steady speed for the next 20sec. it then slows down uniformly until it comes to rest in the next 15sec
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a rope is used to pull a 10 kg block across the floor with an acceleration of 3 m/s2. if the frictional force acting on the block is 56 n, what is the tension in the rope?
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if a fisherman applies a horizontal force with magnitude 51.5 n to the box and produces an acceleration of magnitude 3.20 m/s2, what is the mass of the box?
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if the coefficient of kinetic friction between tires and dry pavement is 0.92, what is the shortest distance in which you can stop an automobile by locking the brakes when traveling at 25.2 m/sm/s ?
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Calculate the value of the maximum velocity for an enzyme-catalyzed reaction that follows michaelis-menten kinetics if the initial velocity is 6 mm/s at a substrate concentration of 6 mm. The km for the enzyme system is 2 mm.
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Even a brief exposure to the ultraviolet light from arc welding can damage the eyes, causing a(n) ______________.
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what is the speed of a 0.145 kg object moving with a momentum of 5.80 ns? group of answer choices 36.0 m/s 40.0 m/s 1.19 m/s 0.841 m/s
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a model rocket is launched with an initial upward velocity of . the rocket's height (in feet) after seconds is given by the following. find all values of for which the rocket's height is feet.
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by what factor would their de broglie wavelength increase if they were instead accelerated through a 2000 v potential?
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the most effective way to utilize abs brakes is to:more infobrake with rapid faltering movements, not to let the wheels lockpress down slowly on the brake pedal until you feel it engage
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a car with a mass of 2000 kg is traveling at 10 m / s. what is the braking force needed to bring the car to complete stop in 5 seconds? group of answer choices
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you and 3 friends are watching a 70 yr old man prepare a hot-air balloon. the balloon is ready and the man is holding one of the 5 released anchors ropes that are all 6m long. his 10 yr old grandson is already in the basket. a gust of wind raises the balloon 2m off the ground. the man shouts for help and you and your friends each grab close to the end of one of the other anchor ropes. the balloon raises so high that even though you are holding onto the ropes, you are lifted off the ground to a height of 7m. what would you do in this situation.
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at a particular point and instant, the magnetic field component of an electromagnetic wave is 15.0 t. what is the magnetic energy density of this wave at that point and instant?
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