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The image of a distant tree is virtual and very small when viewed in a curved mirror. The image appears to be 19.6 behind the mirror. What is its radius of curvature?
A 3.0 mol sample of an ideal monatomic gas undergoes a reversible process at constant volume, increasing its temperature from 300 K to 400 K. What is the entropy change of the gas?
A string under a tension of 43.0 N is used to whirl a rock in a horizontal circle of radius 2.60 m at a speed of 21.0 m/s. The string is pulled in and the speed of the rock increases. When the stri
A constant push of 250 N is necessary to slide a crate weighing 400 N along a 2.0-meter-long ramp. If the ramp raises the crate 1.0 m, what is the efficiency of the ramp?
Suppose a ball rolls off a horizontal table and lands 1.5m out from the edge of the table. If the tabletop is 90cm above the floor, determine the time the ball is in the air.
Twelve equal charges are situted in a circle with radius R, and they are equally spaced. What is the net force on a charge +Q at the centre of the circle?
The advertisement tells you that it can travel 1/4 mile in 20 seconds! Are you making a good decision? Is this a fast car? How do you arrive at your conclusion?
What must the charge of a 1.42 gram particle be for it to remain stationary when placed in a downward-directed electric field of magnitude 630 N/C ?
Determine a safe driving distance rule using kinematics (assuming a decceleration rate of about 4.5 m/s2 and a reaction/throttle-to-brake time of 0.5 sec).
The indices of refraction of the glass for red and violet light are 1.634 and 1.669, respectively. calculate the dispersion angle.
A wet bar of soap slides freely down a ramp 7.5m long inclined at 9.0 degrees.How long does it take to reach the bottom? Assume = 0.080.
When you are 3.00 m below the surface, the top of the sailboat mast appears to you to be in a direction 34 degrees from vertical. calculate the height of the mast.
Charges q1=+3.95 x 10-05 C and q2=-1.90 x 10-04 C are placed at rest 60.0 cm apart. How much work must be done by an outside agent to move these charges slowly and steadily until they are 48.0 cm ap
A current flows along the wing, but only for a short time. Why does the current stop even though the airplane conintues flying through the Earth's magnetic field?
A cannon tilted up at a 26.0 angle fires a cannon ball at 63.0 from atop a 28.0 -high fortress wall. What is the ball's impact speed on the ground below?
A magnetic field of 0.1 T forces a proton beam of 1.5 mA to move in a circle of radius .1m. what is the speed of the proton in the beam as it moves in the circle?
What effect do these shifts have on the semiconductor's ability to conduct electricity
She coasts for a distance of 17.8 m before coming to the edge of a cliff. Without slowing down, she skis off the cliff and lands downhill at a point whose vertical distance is 4.15 m below the edge.
Compute the magnitude of the electric field at a point on the axis and 3.6 mm from the center. The value of the Coulomb constant is 8.98755 × 109 N · m2/C2 .
A nonreflective coating (n = 1.40) covers the glass (n = 1.52) of a camera lens. Assuming that the coating prevents reflection of a specific wavelength (vacuum = 535 nm), determine the minimum nonz
A bat flying at 4.80 m/s is chasing an insect flying in the same direction. If the bat emits a 40.0-kHz chirp and receives back an echo at 40.4 kHz, what is the speed of the insect? (Take the speed
a 50 kg pole vaulter running at 10 m/s vaults over the bar. if the vaulter's horizontal component of velocity over the bar is 1.0 m/s and air resistance is disregarded, how high was the jump?
A cylindrical container with a cross-sectional area of 67.2 holds a fluid of density 826 . At the bottom of the container the pressure is 118 . What is the depth of the liquid?
A spherical shell of radius 6.6 m is placed in a uniform electric field with magnitude 4270 N/C. Determine the total electric flux through the shell.
The shaft of a pump starts from rest and has an angular acceleration of 4.40 rad/s2 for 16.0 s. At the end of this interval, what is the shaft's angular speed?