Step-by-Step Physics Tutorials for Easy Learning

A beam of protons traveling at 1.70 km/s enters a uniform magnetic field, traveling perpendicular to the field. The beam exits the magnetic field, leaving the field in a direction perpendicular to its original direction (the figure (Figure 1)). The beam travels a distance of 1.20 cm while in the field.
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What is the fatty substance that helps insulate neurons and speeds the transmission of nerve impulses?
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Which two substances in the table would float in water?explain how you can tell. water=1.0 copper=8.9 paraffin wax=0.90 steel=7.8 ice=0.92 lead=11.4
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If the child in the previous additional in-class example pulls with an extra 2.0 n in the horizontal direction, what will be the acceleration of the shoe?
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torque can be calculated by multiplying the force (nnn) applied at 9090 to the lever arm at a distance (mm) from the pivot point (point of rotation), the compound si unit for the torque is nmnm. if the force (at 9090 to the lever arm) applied is 15 n
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A(n) _____ is connected in parallel with the component whose voltage is to be measured.
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The number of structural subunits present in a nucleoside and a nucleotide are, respectively :______ a) two and two b) three and three c) two and three d) three and four
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During the examination of a patient, the nurse notes that the patient has several small, flat macules on her posterior thorax. these macules are less than 1 cm wide. another name for these macules is?
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When measured in dollars, street crime costs society more than twice as much as white-collar crime. a) true b) false
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The amount of voltage is directly proportional to the changing amount of ____ in the conductor and inversely proportional to the change in the time that occurs.
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The change in e (internal energy) of a system that releases 45.0 kj of heat and is performing 855 j of work on the surroundings is ____? a. 44.1 kj b. - 44.1 kj c. -900.0 kj d. - 45.9 kj
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Can you determine the general relationship between the work done by the spring on the cart to the velocity of the cart?
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What happens to the brightness of the bulb if the two resistors are exchanged? construct the correct explanation.
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Determine the magnitude of the counterweight w for which the maximum absolute value of the bending moment in the beam is as small as possible.
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when you shoot a projectile from a height above its landing height, and air drag is not a factor, should the same launch angle still give the longest range? why or why not?
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a car is stopped for a traffic signal. when the light turns green, the car accelerates, increasing its speed from to m/s in s. what are the magnitudes of
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while the escalator is not in operation a 183 lb man runs up the escalator at a constant speed. it takes him 9.5 seconds to go from the bottom of the escalator to the top of the escalator. what is the average power the man uses to run up the escalator (in horsepower)? report your answer to three significant figures.
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q21 thinking about proportionalities: use the interactive to answer the following questions: a) keep the speed the same but vary the radius of curvature. does the acceleration of the object vary directly or inversely with radius? b) keep the radius the same but vary the speed of the object. does the acceleration vary directly or inversely with speed?
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the yo-yo is released from rest and falls/unwinds for a distance of h [see fig (b)]. the string does not slip during the descent. what is the total kinetic energy of the yo-yo now?
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star a is four times as luminous as star b. star a is also four times further from earth than star b. how does the apparent brightness of star a compare to that of star b?
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an astronomer who finds that the visible spectrum of a mysterious object shows bright emission lines concludes that the object contains hot, relatively dense gas. true o false
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Which parts of atoms can interact (react) to form chemical bonds? a) valence electrons b) protons c) the nucleus of each atom d) the orbitals
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Ast1117, how to you plot data points for the four galilean moons of jupiter when given the 18 different measurement for your data table.
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A 0.60-t magnetic field is directed perpendicular to the plane of a circular loop of radius 0.40 m. what is the magnitude of the magnetic flux through the loop?
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