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A couple of Physics questions:
1: A cannonball is launched from the ground at an angle of 45 degrees above the horizontal and a speed of 45 m/s. With no air resistance, the ball will land on the ground with a speed of what? 2: a baseball is thrown straight up. At the top of it's path it's acceleration is what ?
Calculate the critical angle of incidence for total internal reflection in glass with a refractive index of 1.50 (Assume that the second medium is a vacuum).
Two resistors when connected in series to a 110 line use one-fourth the power that is used when they are connected in parallel. calculate what is the resistance of the other
A pendulum of length 50cm is pulled 30 cm away from vertical axis and free from rest. What would be its speed at the bottom of its swing.
A guitar string is vibrating in its fundamental mode, with nodes at each end. The length of the segment of the string that is free to vibrate is 0.384m. What is the amplitude of this standing wave
A train slows down as it rounds a sharp horizontal trun,going from 90km/h to 50.0km/h im the 15.0s it takes to round thebend. the radius of the curve is 150m. Compute the acceleration atthe moment the train speed raches 50.0km/h . Assume the train..
A student throws a set of keys vertically upward to her sorority sister, who is in a window 4.10 meter above. Find with what initial velocity were the keys thrown
A 350g object on a frictionless, horizontal lab table is pushed against a spring of force constant 40.0N/cm, How fast is the object moving when it has gained half of the spring's original stored energy
A heat engine absorbs 250 kcal of heat from a high temperature reservoir and exhaust 175 kcal to a low temp recover. Decide engine's thermal efficiency from the efficiency of an ideal gas heat engine,
A bicycle rim has a diameter of 0.65 m and a moment of inertia, measured about its center, of 0.15kg?m2 What is the mass of the rim
A diverging lens (f = -11.5 centimeter) is placed 20.0 centimeter to the left of a converging lens (f =30.5 centimeter). Find what is the height of the final image
Three balls A, B, and C, with masses of 2.7 kg, 1.1 kg, and 1.2 kg, respectively, are connected by massless rods, find the acceleration of the center of mass of the three-ball system
From the top of a 30ft building, the angle of depression to the foot of a building across the street is 70 degrees and the angle of elevation to the top of the same building is 71degrees( how tall is he building across the street ?)
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