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A massive object of m=5kg oscillates with simple harmonic motion. Its position as a function of time varies according to the equation x(t)=2sin(π/2(t)+π/6). At which time after t=0 is the kinetic energy first at a maximum?
Two electrodes are placed in a calcium chloride solution and a potential difference is maintained between them. calculate the current in the solution
A laserpointer has a beam intensity of 55 W/m2 and a beam radius of 2.1 mm. what is the force on the car
Find the critical angle for an optical fiber whose core has n value of 1.50 and whose cladding has n value of 1.15
A body of mass 2.60 kg moves along the x-axis, and its motion is described by the equation x = 7 sin (24 t + 2), where x is in m and t is in s. Find the resultant force on the body at t = 0.100 s
A cannon tilted up at a 30° angle fires a cannon ball at 90 m/s from atop a 16 m high fortress wall. What is the ball's impact speed on the ground below
A rocket, initially at rest on the ground, accelerates straight upward from rest with constant acceleration 39.2m/s2. Find the maximum height ymax reached by the rocket
A 280-kg piano slides 4.3 m down a 30o incline and is kept from accelerating by a man who is pushing back on it parallel to the incline. The effective coefficient of kinetic friction is 0.40.
The electric field lines on the left have twice the separation of those on the right. If the magnitude of field at point-A is 60 V/m, what is the magnitude of the field at point-B.
A wood log with a volume of 12 ft3 is submerged in water. Calculate the buoyant force (in Newtons) acting on the log
A 1100- kg car rolling on a horizontal surface has speed v= 50 km/h when it strikes a horizontal coiled spring and is brought to rest in a distance of 2.2 m. What is the spring stiffness constant of the spring?
A cosmic ray travels 60km through the earth's atmosphere in 450us , How long does the journey take according to the cosmic ray
What is magnitude of the speed of the boat
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