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How much work is done by a 208 lb person who walks up a 24 ft high flight of stairs?
A curve in a road forms part of a horizontal circle. As a car goes around it at constant speed 14m/s, the total force exerted on the driver has magnitude 120 N. What are the magnitude and direction of the total vector force exerted on the driver i..
A telescope consists of a mirror with radius of curvature 6.5 m and an eyepiece. If an astronomer would like the telescope to have a magnification of 114, what focal length eyepiece should he use?
When a container is filled to the brim with liquid, what happens when the temperature rises? You are doing a controlled experiment on a strange, liquid metallic substance. What is the volume of fluid metal that overflows
A 2.41 mol sample of an ideal gas expands reversibly and isothermally at 403 K until its volume is doubled. What is the increase in entropy of the gas
A singly charged positive ion has a mass of 2.53 10-26 kg. After being accelerated through a potential difference of 270 V, the ion enters a magnetic field of 0.590 T, Calculate the radius of the path of the ion in the field
A square wire 2.0 cm on each side is oriented so that 5.00 mT magnetic field makes a 30 degree angle with the normal to the plane of the square. if a 1.0 mA current causes a 25 N x m torque on the wire, how many loops does the wire make?
I place a 4cm-high object 10cm in front of a 10cm focal length concave lens. How tall is the image
a plane leaves seattle flies 78.0 at 20.0 north of east and then changes direction to 55.0 south of east. after flying
a person looking out the window of a stationary train notices that raindrops are falling veritcally down at a speed of
A flutist assembles her flute in a room where the speed of sound is 342m/s . When she plays the note A, it is in perfect tune with a 440Hz tuning fork. How many beats per second will she hear if she now plays the note A as the tuning fork is sounde..
a sound wave traveling in 26 degrees C air has a pressure amplitude of 0.500 Pa. (assume that the density of air is 1.29 kg/m^3). What is the intensity of the wave
A telescope can be used to enlarge the diameter of a laser beam and limit diffraction spreading. what is the minimum angular spread of the beam
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