Master Physics with Fun Quizzes & Brain Teasers!

what is the molar mass of an unknown gas with a density of 6.25 g/l at 2.00 atm and 55.0 c?
1 Answer
find the work required to move an object in the force field f=x,2 along the straight line from a(0,0) to b(4,3). check to see whether the force is conservative.
1 Answer
Consider a projectile launched at a height of h feet above the ground at an angle of theta with the horizontal. The initial velocity is v0 feet per second, and the path of the projectile is modeled by the parametric equations x = (v0 cos(theta))t and y = h + (v0 sin(theta))t 16t2. An archer releases an arrow from a bow at a point 4 feet above the ground. The arrow leaves the bow at an angle of 20 with the horizontal and at an initial speed of 200 feet per second.(a) Write a set of parametric equations that model the path of the arrow. (Enter your answers as a comma-separated list of equations.)b)Assuming the ground is level, find the distance (in feet) the arrow travels before it hits the ground. (Ignore air resistance. Round your answer to one decimal place.)c)Use a graphing utility to graph the path of the arrow. Approximate its maximum height in feet. (Round your answer to two decimal places.)
1 Answer
A 6 kg block sits at rest on a frictionless horizontal table. A 13 N horizontal force is suddenly applied to the block and maintained as the block begins movingA)What is the acceleration of the block after the force is appliedB)What is the speed of the block after it has moved a distance of 0.5 m?
1 Answer
light of wavelength 540 nm is incident on a slit of width 0.150 mm, and a diffraction pattern is produced on a screen that is 2.00 m from the slit. what is the width of the central bright fringe
1 Answer
Fixed in the frame F is a sheet of charge, of uniform surface density sigma, which bisects the dihedral angle formed by the x-y and the y-z planes. The E-field of this stationary sheet is of course perpendicular to the sheet. How will this be described by observers in the frame F' that is moving in the direction with velocity 0.6c with respect to F? What is the surface charge density sigma prime and what is the direction and strength of the E-field in F'? Is it perpendicular to the sheet?
1 Answer
a box is pulled by a force of 9.00n. if the work done on the box is 7.00j, how far was it pulled?
1 Answer
describe some of the characteristics of the universe that are explained by the standard big bang model.
1 Answer
a solenoid has 1200 loops per meter and carries a current of 6.8 aa . What is the magnetic field inside the solenoid?
1 Answer
frequency range is from 526 khz and 1706 khz at 10 khz intervalsT/F
1 Answer
an object that completes 20 vibrations in 10 seconds has a frequency of a. 1 hertz. b. 0.5 hertz. c. 2 hertz. d. 200 hertz.
1 Answer
which type of object would likely cause more damage if it struck near an urban area: a small metallic one, or a large stony/icy one?
1 Answer
air at 1 atmosphere and 20 c flows in a 3 centimeter diameter pipe. the maximum velocity of air to keep the flow laminar is
1 Answer
Show that the maximum kinetic energy Ek, called the Compton edge, that a recoiling electron can carry away from a Compton scattering event is given by hf EX (1 + mc2/2hf) where f is the frequency of the incident photon and m is the electron mass.
1 Answer
if p = 269 w and q = 155 var (capacitive), find the complex power. the complex power is ( j ) va.
1 Answer
A 4.0-cm-tall object is 16 cm in front of a diverging lens that has a -20 cm focal length.a. Calculate the image position.b. Calculate the image height.
1 Answer
why is it necessary to let the entire apparatus cool
1 Answer
A heavy rope, 30 ft long and weighing 15 lbs, hangs over the edge of a building 100 ft high. How much work is done in pulling the rope up 20 ft?
1 Answer
what is the magnitude of its temperature change |t|= 18.6 k in degrees celsius? view available hint(s)
1 Answer
A 2 kg bar is rotating downward at 2 rad/s. The spring has an un-stretched length of Im and aspring constant of 10 N/m. Determine the angle (measured down from thehorizontal) to which the bar rotates before it stopsits initial downward movement. ( g = 10 m/s?)A. 0 = 25.4B. 0=31.1C. 0 = 35.2D. 0 = 37.9
1 Answer
at what speed will the momentum of a proton (mass 1.0 u ) equal that of an alpha particle (mass 4.0 u ) moving at 0.20 c ?
1 Answer
what is the wavelength of light falling on double slits separated by 1.82 m, if the third-order minimum is at an angle of 57.0?
1 Answer
if you were able to hold two hairs very close to each other and exactly parallel, what diffraction pattern would you get?
1 Answer
what is the reactance of an inductor with an inductance of 2.60 h at a frequency of 75.0 hz ?
1 Answer