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An archer shoots an arrow with a velocity of 30 m/s at an angle of 20 degrees with respect to the horizontal. An assistant standing on the level ground 30 m downrange from the launch point throws an apple straight up with the minimum initial speed necessary to meet the path of the arrow. What is the initial speed of the apple and at what time after the arrow is launched should the apple be thrown so that the arrow hits the apple?
Four spheres are arranged as in the figure in the corners of a 2cm-side square, How much work is required to move a tiny charge of 10nC from C to A
A spacecraft approaching the earth launches an exploration vehicle. After the launch, What is the speed of the exploration vehicle
A trolley that moves along a horizontal beam is acted upon by two forces as shown. (a) Knowing that a 5 25°, determine by trigonometry the magnitude of the force P so that the resultant force exerted on the trolley is vertical. (b) What is the cor..
Interpreting attenuation as a reflection loss calculate the lower limit to the effective reflectivity at the core cladding boundary
A pendulum clock keeps time by the swinging of an attached mass at the end of a massless string of length L, What is the angular position of the mass at t = 0.246s
Light inside an optical fiber tube hits the wall between the tube and air. What is the index of refraction of the tube
Given the standard molar volume of gas is 22.71 L/mol at a temp of 273.15K and a pressure of 1 bar, what is the value of the ideal gas constant
A 2000 kg car is slowed down uniformly from 21.0 m/s to 10.00 m/s in 3.60 s. (a) what average total force acted on the car all through that time? (b) How far did the car travel all through that time.
A space traveler weighs 580 N on earth. What will the traveler weigh on another planet whose radius is three times that of earth and whose mass is twice that of earth?
A uniform disk turns at 4.3 around a frictionless spindle. A nonrotating rod, of the same mass as the disk and length equal to the disk's diameter, is dropped onto the freely spinning disk.
The pyramid depicted in the figure contains approximately 2.20 million stone blocks that average 3.00 tons each. Find the weight of this pyramid in pounds. (Please provide numerical answer in lbs)
A 3 kg object id released from rest at a height of a 5 meter curved frictionless ramp. At the foot of the ramp is a spring force constant of k= 400n/m the object slides down the ramp and onto the spring compressing it to the distance x before comi..
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