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Suppose you drop a feather and a steel ball of equal masses (0.010 kg) at the same time from a height of 1.9 m and you are told that the feather hits the floor 4.5 s after the steel ball.
A. Estimate the value of the terminal velocity of the feather in air.
B. Estimate the feather's drag coefficient.
A rock is tossed straight up with a speed of 29{\rm m}/{\rm s}. What is the rock's velocity as it hits the bottom of the hole
A research balloon bound for the stratosphere is filled at sea level with 800 m3 of helium whose initial temperature is 285 K. What is the temperature of the helium
If the coefficient of friction between road and tires on a rainy day is 0.100, what is the minimum distance in which the car will stop?
A 3.0cm × 3.0cm parallel-plate capacitor has a 2.0mm spacing. The electric field strength inside the capacitor is 1.1×105V/m
Electrons accelerated by a potential difference of 12.43 V pass through a gas of hydrogen atoms at room temperature. Calculate the wavelength of light emitted with the shortest possible wavelength
A circular wire loop whose radius is 19.0 cm carries current of 2.30 A. It is placed so that the normal to its plane makes an angle of 29.0° with a uniform magnetic field of 11.0 T. Calculate the magnetic dipole moment of the loop.
Consider the reaction 4He + 40Ca -> 3H + 21Sc Find the minimum laboratory kinetic energy for the 4He projectile if 40Ca is stationary
Two teams of nine members each engage in a tug of war. The first team's members have average masses of 73 kg, What is the acceleration of the two teams
A circular loop in the plane of the screen lies in a 0.60 T magnetic field pointing into the screen. The loop's diameter changes from 18.5 cm to 6.0 cm in 0.50 s.
Five equal-mass particles (A-E) enter a region of uniform magnetic field directed into page. They follow the trajectories. Rank the particles on the basis of their speed.
Two positive point charges, each of which has a charge of 3.4 × 10?9 C, are located at y= + 0.80m and y= ? 0.80m, Find the magnitude of the resultant electrical force on a charge of 9.0 × 10
A sound source emits sounds of frequency 190 Hz that travel by still air at 340 m/s. The listener moves at 75 m/s relative to still air toward the stationary source. What is the wavelength of the sound between source and listener.
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