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A man pulls a suitcase from its handle, making an angle of 45 degress above the horizontale. While moving the suitcase horizontally over a distance of 40 m, 820 J of work are done by the man on the suitcase. Find the pulling force of the man. (cos45 = 0.7, sin45 = 0.7)
A gun is positioned to fire a bullet of mass m = 8.4 g into the block along the spring axis. After the gun is fired, the bullet gets embedded in the block, and the spring is compressed a maximum distance d. Find an equation for the speed of the b..
A tuning fork with frequency 540 Hz is dropped from a building of height 125 m by a musician. The musician can hear the fork sounding as it falls. What frequency does the musician hear right after 3 seconds?
A block of ice at 0°C is added to a 150 g aluminum calorimeter cup which holds 210 g of water at 12°C. If all however 2.0 g of ice melt, what was the original mass of the block of ice?
In a certain experiment, a radio transmitter emits sinusoidal electromagnetic waves of frequency 105.0 in opposite directions inside a narrow cavity with reflectors at both ends, How far apart are the nodal planes of the magnetic field
q1. earth takes about 365 days to orbit once around the sun. mercury the innermost planet takes less than a fourth of
A wrecking ball (800 kg) swings from a crane in a circular path of radius 20 m. At the bottom of its swing, it moves with a speed of 10 m/s; Calculate the centripetal force that acts on the ball
A spring (k = 200 N/m) is suspended by its upper end supported from a ceiling. With the spring hanging in its equilibrium configuration, an object (mass = 2.0 kg) is attached to the lower end and released from rest. What is the speed of the object af..
In an RC series circuit EMF = 120.0 V, R = 1.40 MΩ, and C = 1.80μF. Calculate the time constant. Find the maximum charge that will appear on the capacitor during charging.
A particularly beautiful note reaching your ear from a rare Stradivarius violin has a wavelength of 39.1 cm. The room is slightly warm, so the speed of sound is 344 m/s. Part A If the string's linear density is 0.560g/m and the tension is 160N , how ..
A plane accelerates from rest at a constant rate of 5.00m/s2 along a runway that is 1800m long. What is the time tTO needed to take off
An airplane flies due north in a region where Earth's magnetic field has magnitude 5.3×10?5T, declination 0?, and inclination 75?. What's the induced emf between the wingtips, 36 m apart, when the plane flies at 230m/s
A wheel is spinning at 75 rad/s. Over a period of 15 second it is spinner up to353 rad/s. Find how many revolutions it made while spinning up
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