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A student throws a set of keys vertically upward to her sorority sister, who is in a window 2.50 m above. The second student catches the keys 2.00 s later.
(a) With what initial velocity were the keys thrown?
(b) What was the velocity of the keys just before they were caught?
Two thin beams are joined end-to-end as shown in the figure to make a single object. What is the gravitational torque on the object
A narrow beam of light is incident normally on one face of equiangular glass prism of RI 1.45. Find the refractive index of this liquid and draw a diagram showing the path of rays
most species of fish have expandable sacs commonly known as swim bladders that enable fish to rise in the water by
A sinusoidal wave of wavelength 1.94 m and amplitude 0.0584 m travels with a speed of 0.878 m/s on a string. What is the maximum speed of any point on the string
An ideal gas at 20 C consists of 2.2 X 10^{22} atoms. 4.3 J of thermal energy are removed from the gas. What the new temperature in C.
The pulmonary artery, which connects the heart to the lungs, has a radius of 2.6 mm and is 8.4 cm long. what is the speed of the blood in this artery
Four identical 7 mC charges are placed on a neutrally- charged penny, Determine the resulting potential in the center of the penny due to the four charges
A raft is constructed of woodhaving a density of 626.2kg/m3. how deep is the bottom of the raft below water level
A block of unknown mass, m, is brought into the configuration shown. It was measured that upon release the block shot upward a maximum distance of 2m. Calculate the mass of this block? The upper spring has a natural length of 1m, and the lower spr..
A lecturer is demonstrating two-slit interference with sound waves. Two speakers are used, 1.9 m apart. The sound frequency is 1180 Hz and the speed of sound is 343 m/s. Students sit facing the speakers in a row of seats 5.1 m away.
Steam enters an isentropic turbine at an initial condition of 3.5 MPa and 400°C and leaves at a pressure of 175 kPa. Determine the work produced by this turbine
Light with a wavelength of 4.5 x10-5 cm passes through a single slit and falls on a screen 100 cm away. If the slit is 0.015 cm wide, what is the distance from the center of pattern to first dark band.
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