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A projectile is launched at an elevation angle of 60o with an initial velocity of 120 m/s. Determine what is the x and y component of its velocity when it reaches a height which is 1/3 its maximum height above its launch point? Compute what angle above the horizontal is the velocity vector at this point?
What is the reactance of a 8.2×10?2?F capacitor connected to a 19kV (rms), 540Hz line? Determine the frequency and the peak value of the current
a positive charge of -4 microcoulombs is llocated at the center of a spherical shell of inner radius 2cm and outer radius 3cm, what is the total charge on he inner shell
A petite young woman distributes her 550{\rm N} weight equally over the heels of her high-heeled shoes. Each heel has an area of 0.650{\rm cm^2}. What pressure is exerted on the floor by each heel
The radius of a black hole is the distance from the black hole's center at which the escape speed is the speed of light. What is the radius of a black hole with a mass five times that of the Sun
Two light sources are used in a photoelectric experiment to determine the work function for a particular metal surface. what is the work function for this metal
A 150g glider on a horizontal frictionless air track is attached to a fixed ideal spring with force constant 135N/m. What is the angular frequency of the oscillation
A bat can detect small objects, such as an insect, whose size is approximately equal to one wavelength of the sound the bat makes. what is the smallest insect a bat can detect
A spherical object with a moment of inertia of 0.482mr2 starts from rest rolling down a 3.51-m high incline. what is its linear speed at the bottom of the incline
a solenoid is formed by winding 26.7 m of insulated silver wire around a hollow cylinder. the turns are wound as
Suppose that the coefficient of kinetic friction between Zak's feet and the floor, while wearing socks, is 0.250. Knowing this, what distance d will he slide before stopping
how do the temperature of combustion and the temperatures of collant and exhaust affect the efficiency of automobile
A rock is thrown vertically upward from ground level at time t = 0. At t = 1.9 s it passes the top of a tall tower, What is the height of the tower
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