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A ball is thrown so that its initial vertical and horizontal components of velocity are 60 m/s and 15 m/s, respectively. Estimate the maximum height the ball reaches.
a 4500 kg helicopter accelerates upward at 2.0m/s^2. what lift force is exerted by the air on the propellers
A 1967 Kennedy half-dollar has a mass of 1.150 x 10-2 kg. The coin is a mixture of silver and copper, and in water weighs 0.1012 N. Determine the mass of silver in the coin
A block rests on a horizontal surface, and the coefficient of static friction between the block, Find the frequency at which the block begins to slide on the surface
A monoenergetic beam of electrons in incident on a single slit of width 1.05 nm. A diffraction pattern is formed on a screen 20 cm from the slit. what is the energy of the incident electrons
A straight ladder is leaning against the wall of a house. Theladder has rails 4.40 m long,joined by rungs 4.500 m long. What should be the thicknessof the flat rock
A 14-A current flows into a series combination of 2.0 ?, 3.0 ?, and 6.0 ? resistors. How much power is dissipated by each resistor
Two frisky grasshoppers collide in midair at the top of their respective trajectories and grab onto each other, holding tight thereafter. One is a robust beast of mass m1 initially moving south at a velocity of v1,
Two point charges Q1=+5.00 nC and Q2= -3.00 nC are separated by 35.0cm. (a) What is the electric potential at a point midway between the charges? (b) What is the potential energy of the pair of charges? What is the significance of the algebraic si..
A flashlight uses batteries that add up to 4.5 V and has a power output of 0.56 W. How much current is drawn from the batteries
An oil droplet with 13.0 excess electrons is observed between two parallel electrodes spaced 11.0mm apart. What is the radius of the droplet
Which best describes the total mechanical energy of a system in simple harmonic motion? A. zero as it passes the equilibrium point B. zero when it reaches the maximum displacement C. a maximum when it passes through the equilibrium point D. consta..
A string that is fixed at both ends has a length of 2.68 m. When the string vibrates at a frequency of 83.9 Hz, What is the wavelength of the waves that travel on the string
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