How long until person on fifth floor see ball by window
A person on the 20th floor (66 m above ground) of a building reaches out and throws a ball directly upwards at 13 m/s. How long (secs) until a person on the 5th floor (16.5 m) see the ball go by the window?
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When the object is 0.020m from its equilibrium position it is moving at speed 0.55m/s. (a) Calculate the amplitude of the motion, (b) Calculate the maximum speed attained by the object.
An object with a mass of 21 g displaces 957.1 ml of water when it is completely immersed. What is the buoyant force on the mass?
By comparing the age-specific incidence for a given age group to the age-specific incidence of a similar group clearly decrease at older age at the same sites?
Two point charges are placed along the x-axis. Charge q1 = +25microcoulombs is fixed in place at x=+9cm and charge q2 = -36 microcoulombs is fixed at x = +3cm. what is the net electric field at the origin?
Consider a cylindrical segment of a blood vessel 2.9 cm long and 1.70 mm in diameter. What additional outward force would such a vessel need to withstand in the person's feet compared to a similar vessel in her head?
Two circular loops of wire, each containing a single turn, have the same radius of 5.0 cm and a common center. The planes of the loops are perpendicular. Each carries a current of 1.9 A. What is the magnitude of the net magnetic field at the comm
The drawing shows an A-shaped stepladder. Both sid es of the ladder are equal in length. This ladder is standing on a frictionless horizontal surface, and only the crossbar (which has a negligible mass) of the "A" keeps the ladder from collapsing
A typical cell membrane is 7.96 nm thick and has an electrical resistivity of 1.33E+7 OHMm. If the potential difference between the inner and outer surfaces of a cell membrane is 74.1 mV, how much current flows through a square area of membrane 1.
Calculate the initial magnitude of the acceleration of the electron.
The intensity level of the street traffic is 60dB. If you are conversing with a friend in a sidewalk café, what will be the total intensity of the combined sounds?
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