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Suppose a red blood cell is examined with a compound microscope in which the objective and eyepiece are separated by a distance of 11.0 cm. Given that the focal length of the eyepiece is 2.51 cm, an
A bullet of mass 10 g is fired with an initial speed of 296 m/s into a wooden block that is initially at rest. The bullet becomes lodged in the block, and the two slide together on the floor for a d
If you weigh 780 N on the earth, what would you weigh at the surface of a neutron star that has the same mass as our sun and a diameter of 17 km?
A ball of mass 0.240 grams and positive charge, q =39.3 microC, is suspended on a string of negligible mass in a uniform electric field. We observe that the ball hangs at an angle of theta =15.0 o
imagine adding electrons to the pin until the negative charge has the very large value 2.00 mC. how many electrons are added for every 10^9 electrons already present?
A sealed cubical container 25.0 cm on a side contains three times Avogadro's number of molecules at a temperature of 16.0°C. Find the force exerted by the gas on one of the walls of the contain
A stone with a mass of 0.800 is attached to one end of a string 0.600 long. The string will break if its tension exceeds 65.0 . The stone is whirled in a horizontal circle on a frictionless tabletop
The wave reflects from the speeder's car and returns to the police car, where its frequency is measured to be 324 Hz less than the emitted frequency. Find the speeder's speed with respect to the gro
A sound source emits sounds of frequency 200 Hz that travel through still air at 340 m/s. The listener moves at 70 m/s relative to still air toward the stationary source. What is the wavelength of
How much work (in joules) is done by the electric force when an electron is accelerated from the cathode to the anode?
The beam emerges from the laser at a point that is 1.10 m from the mirror and 1.80 m above the floor. After the reflection, how far from the base of the mirror does the beam strike the floor?
A car is driven east for a distance of 49 km, then north for 21 km, and then in a direction 27° east of north for 26 km. Determine (a) the magnitude (in km) of the car's total displacement from
Only two forces act on an object (mass = 3.00 kg), as in the drawing. (F = 64.0 N.) Find the magnitude and direction (relative to the x axis) of the acceleration of the object.
Find the magnetic flux through the loop when L = 2.10 {rm cm}. Find the magnetic flux through the loop when L = 6.20×10-2 {rm cm}.
A small ball of mass 77 g is suspended from a string of length 41 cm and whirled in a circle lying in the horizontal plane. If the string makes an angle of 29? with the vertical, find the centripeta
If the magnetic field decreases to zero in a time of 0.52 s, what is the magnitude of the average emf induced in the loop?
Estimate the number of electrons present in a (neutral) 1.8 kg block of carbon.
A scaffold of mass 35 kg and length 5.8 m is supported in a horizontal position by one vertical cable at each end. A window washer of mass 86 kg stands at a distance d from the midpoint of the scaf
A purse at radius 2.00m and a wallet at radius 3.00m travel in uniform circular motion on the floor of a merry go round as the ride turns. They are on the same radial line. at one instant the accele
Four identical masses of mass 500 {rm kg} each are placed at the corners of a square whose side lengths are 10.0 {rm cm}. What is the magnitude of the net gravitational force on one of the masses,
What is the wavelength of an electromagnetic wave (in vacuum) of frequency 5.6 GHz?
A child goes down a playground slide with an acceleration of 1.10 m/s^2. Find the coefficient of kinetic friction between the child and the slide if the slide is inclined at an angle of 29.0 degree
Find the tension in the cable, the horizontal force exerted on the beam by the pole and the vertical force exerted on the beam by the pole.
A 50-Omega resistor, a 0.1-H inductor, and a 10-mu F capacitor are connected in series to a 60-Hz source. The rms current in the circuit is 3 A. Find the rms voltage across the resistor, the induct
Which of the following statements about pure water is true?