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The position vector of a particle of mass 2 kg is given as a function of time by r = (9 m) (i hat) + (3 m/s)t (j hat). Determine the magnitude of the angular momentum of the particle with respect to the origin at time 9 s. Answer in units of kg*m2/s
A 0.14-kg pinecone falls 16m on the ground, where it lands with aspeed of 13 m/s. What speed would the pinecone have landed if there had been noair resistance
An object accelerates from 19 m/s to 50 m/s in 15 seconds. What is the objects acceleration in m/s2
A uniform disk turns at 3.7 rev/s around a frictionless spindle. Anonrotating rod, of the same mass as the disk and length equal tothe disk's diameter, is dropped onto the freely spinning disk. They then turn together around the spindle with their..
Certain fish, such as the Nile fish (Gnathonemus), concentrate charges in their head and tail, thereby producing an electric field in the water around them. find the strength of the magnetic field at the receptor cells
A 89.0kg skydiver can be modeled as a rectangular "box" with dimensions 24.0cm \times 44.0cm \times 175cm. What is his terminal speed if he falls feet first
A student ofmass m standsat one end of a long log of length l and mass M, which is floating on the campuspond at right angles tothe shore. Assume there is no friction between the logand the water.
question an aluminum baseball bat has a length of 0.81 m at a temperature of 20degc. when the temperature of the bat is
A startled armadillo leaps upward rising 0.544 m in the first 0.202 s. What is its initial speed as it leaves the ground?
James Bond is riding a bike at 15 m/s, chasing Car #1 moving in the same direction at 35 m/s. Behind James is another car, Car 2, What is the beat frequency he hears
Suppose optical radiation (? = 5.60 10-7 m) is used to determine the position of an electron to within the wavelength of the light. What will be the resulting uncertainty in the electron's velocity?
A 4.0-m-diameter playground merry-go-round, with a moment of inertia of 350kg•m2 is freely rotating with an angular velocity of 2.5rad/s. How fast was Ryan running when he jumped on
A person on a bicycle accelerates at 2.0 m/s2 for 30 seconds. If the final velocity is 10 m/s, what was the cyclist's initial velocity
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