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Find what heat in calories (cal) is required to change 52g of 100°C boiling water into steam. The heat of vaporization for water Lv is 540cal/g.
A projectile, fired with unknown initial velocity, lands 21.2 s later on the side of a hill, 2760 m away horizontally and 435 m vertically above its starting point. What is the horizontal component of its initial velocity
a small negatively charged particle has a charge of 1.33e-6 c and a mass of 8 mg. it moves from point a where the
An electron is accelerated by a uniform electric field (1000 V/m) pointing vertically upward. Use energy methods to get the magnitude and direction of its velocity after it moves 0.10 cm form rest. Does the electron gain or lose potential energ..
A 2.00m -long, 450g rope pulls a 13.0kg block of ice across a horizontal, frictionless surface. The block accelerates at 2.40m/s2 . How much force pulls forward on (a) the ice, (b) the rope.
A 3.00 kg block slides from rest from the bottom of an inclined plane, tilted up at 25 degrees. How fast is the block traveling up the ramp
A disoriented physics professor drives 3.27km north, then 4.69km west, and then 1.59km south. Use components to find the magnitude of the resultant displacement of this professor
A six-loop coil of current-carrying wire spanning an area of 0.0249 m2 has a magnetic dipole moment of 6.35e?3 A·m2. What current is flowing through the wire
A student constructs an astronomical telescope with a magnification of 10. what is the resulting length of the telescope
A laser emits a cylindrical beam of light 1.3 mm in diameter. what is the rms valueof the electric field in the laser beam
What is a dispersion diagram? Explain how the phase and group velocities can be determined from a dispersion diagram. When is it meaningful to attribute a group velocity to a signal comprised of more than two frequencies? Why?
An electron is accelerated through a potential difference of 3284 Volts in an electron microscope. Find the electron's velocity and use it to determine the de broglie wavelength of the electrons
an empty parallel plate capacitor is connected between the terminals of a 13.9-v battery and charges up. the capacitor
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