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The second force has a magnitude of 64 N and is directed at an angle ? with respect to the rod. If the sum of the torques due to the two forces is zero, what must be the angle ??
The second force has a magnitude of 6.00 N and acts at a 54.8o angle with respect to the length of the stick. Where along the stick is the 6.00-N force applied? Express this distance with respect to
What is the new rotation rate assuming the child remains at the rim. Ignore frictional forces. Your answer should be given in rev/s to 3 decimal places.
Expand the van der Waals equation in a Taylor series in (V - Vc), keeping the terms through the third degree. Show why, near temperature close to Tc, the critical temperature, the quadratic term can
Please Give all places after decimal A metal wire of mass 57 kg slides without friction on two horizontal rails spaced a distance of 16 m apart. The track lies in a vertical uniform magnetic field o
What is the difference between intersecting snd perpendicular lines? Can two line exist that are not intersecting or parallel? Explain you answer.
An water wave oscillates up and down 5 times each second. The distance between the wave crests is 3m how is the frequency, wavelenght, speed determinded?
An unstable particle called the pion has a mean lifetime of 25 ns in its own rest frame. A beam of pions travels through the laboratory at a speed of 0.575c. (a) What is the mean lifetime of the pio
An 11,000-watt radio station transmits at 880 kHz. Calculate the energy of a single photon at the transmitted frequency.
As a 32,000 lb airplane takes off, the tangential component of the force exerted by its engines is Ft=45,000lb. Neglecting other forces on the airplane, determine(a) the masimum power and (b) the av
Assuming that the molecules are moving at their root-mean-square speeds, the average time interval between collisions of an oxygen molecule is closest to ?
The near point of the person using the microscope is 24.5 and you can assume she can view the image produced with a fully relaxed eye. What is the focal length of the objective?
The headlights of on a small car are separated by 115 cm. At what maximum distance could you resolve them if the diameter of the pupil of your eye is 5 mm and the wavelength of light is assumed to b
Your car has a rear view mirror that is convex with a radius of curvature of 5 m. A car is approaching you from the rear. Calculate the demagnification of the image of the approaching car as seen by
The index of refraction for silicate flint glass is 1.66 for light with a wavelength, in air, of 400 nm and 1.61 for light with a wavelength, in air, of 700 nm. Find the angles of refraction for lig
If there are five dark bands per centimeter, what is the angle of the wedge?
Two steel wires of the same length, one with radius r and the other with radius 2r, are connected together, end to end, and tied to a wall. An applied force stretches the combination by d = 1.6 mm.
A cylinder of radius 3.34 cm and a sphere of radius 8.47 cm are rolling without slipping along the same floor. The two objects have the same mass. If they are to have the same total kinetic energy,
A biophysicist grabs the ends of a DNA strand with optical tweezers and stretches it 27um . How much energy is stored in the stretched molecule if its spring constant is 0.044pN/um ?
A spring of constant 290N/m is used to launch a 1.0kg block along a horizontal surface whose coefficient of sliding friction is 0.25. If the spring is compressed 16cm, how far does the block slide?
For small stretches, the Achilles tendon can be modeled as an ideal spring. Experiments using a particular tendon showed that it stretched 2.66mm when a 125kg mass was hung from it. Find the spring
A skier starts down a frictionless 33 degree slope. After a vertical drop of 30m , the slope temporarily levels out and then drops at 15 degrees an additional 44m vertically before leveling out agai
A 3-kg object attached to a spring oscillates on a smooth horizantial surface. Its position versus time is given by the expressionCalculate the spring force exerted on the object versus time t.
Earnshaw's theorem says that you cannot trap a charged particle in an electrostatic field. Could you trap a neutral but polarizable atom in an electrostatic field?
Where is the image of the robin and how long is the image? (hint: remember that the focal length is half the radius, and focal length is negative for a convex mirror)