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A 1.0-cm-diameter microscope objective has a focal length of 2.8 mm . It is used in visible light with a wavelength of 550 nm. What is the objective's resolving power if used in air
Two capacitors are connected in parallel across the terminals of a battery. One has a capacitance of 2.5 uF, What is the voltage of the battery
A parallel plate capacitor has a separation between its plates of 1.0 mm. There is a dielectric with a dielectric constant of 2.1 fi ling the gap. what is the area of one of the capacitor plates
The starter motor of a car engine draws a current of 100A from the battery. The copper wire to the motor is 4.0mm in diameter, How much charge passes through the starter motor
A 10.0-kg object experiences a drag force due to air resistance. At what velocity (magnitude and direction) is the net force on the object twice its weight
A ball thrown straight upward returns to its original level in 2.80 s . A second ball is thrown at an angle of 44.0 degrees above the horizontal. What is the initial speed of the second ball
A ball rolls off a table and falls 0.70 m to the floor, landing with a speed of 4.3 m/s. What is the magnitude of the acceleration of the ball just before it strikes the ground
A train moving with constant velocity travels 180 m north in 14 s and an undetermined distance to the west. How far west has the train traveled in this time
In a friendly game of handball, you hit the ball essentially at ground level and send it toward the wall with a speed of 21 m/s at an angle of 31 degrees above the horizontal
A bowling ball weighing 71.6 is attached to the ceiling by a rope of length 3.71 . The ball is pulled to one side and released, What is the acceleration of the bowling ball
A 1.87 kg rolling hoop with a radius of 6 cm rolls without slipping. If the angular speed of the hoop is 2.82 rad/s , compute rotational kinetic energy of the rolling hoop in Joules
The current in a 100 watt lightbulb is 0.700A . The filament inside the bulb is 0.120mm in diameter. What is the electron current in the filament
The following charges are located inside a submarine: 6.20 µC, ?9.00 µC, 27.0 µC, and ?59 µC. find the net electric flux through the hull of the submarine
A coil is connected in series with a 10.0k? resistor. A 50.0 V battery is applied across the two devices, How much energy is stored in the coil at the same moment
A researcher notices that the frequency of a note is emitted by a car horn appears to drop from 284 Hz to 266 Hz as the car passes him. What value does he obtain for the speed of the car
A laser beam in air is incident on a liquid at an angle of 38.0 with respect to the normal. What is the critical angle for total internal reflection for this fluid
In her bathroom, Mindy has an overhead heater that consists of a coiled wire made of nichrome that gets hot when turned on. What current does the wire carry
A 2.0 mm-diameter glass bead is positively charged. The potential difference between a point 2.2 mm from the bead
An airplane is flying in a jet stream that is blowing at 45.0 m/s in a direction 15 degrees south of east. What is the airplane's speed relative to the air mass
The place you get your hair cut has two nearly parallel mirrors 7.00 apart. As you sit between these mirrors in the chair, your head is 2.50 from the mirror in front of you. How far away does the ba
Certain sharks can detect an electric field as weak as 1.1 mu V/m . To grasp how weak this field is, how far apart would the plates have to be
Two capacitors are connected to a battery. The battery voltage is V = 50 V, and the capacitances are C1 = 2.00 ?F, Determine the total energy stored by the two capacitors
A galvanometer with a coil resistance of 14.1 is used with a shunt resistor to make a nondigital ammeter that has an equivalent resistance of 0.755. Find the full-scale current of the galvanometer
A wire etched onto a computer chip carries a current of 0.000000033 A. In 1.8 milliseconds, how many electrons flow past a point on the wire
0.0023 J of energy are stored in a parallel-plate capacitor whose plates each have area 0.30 m2, find the electric field energy density between the plates