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The far point of a nearsighted person is 5.1 m from her eyes, and she wears contacts that enable her to see distant objects clearly. How high is the image formed by the contacts
A woman can read the large print in a newspaper only when it is at a distance of 66 cm or more from her eyes. What should be the refractive power (in diopters) of her glasses
A box starts from rest and is pushed a distance d = 1.25 meters along a frictionless ramp by a horizontal force, Fa, in 9.75 seconds. find the acceleration of the box as it slides up the ramp
A monatomic ideal gas is heated while at a constant volume of 1x10^-3 m^3, using a 10 watt heater. How long was the heater on
The two stars in a binary star system have masses 2.2x10^30kg and 5.9x10^30kg. They are separated by 1.8x10^12m. What is the speed of the lightest star
You have been visiting a distant planet. Your measurements have determined that the planet's mass is four times that of earth but the free-fall acceleration at the surface is only one-fourth as larg
A chest x ray uses 14 keV photons. A 65 kg person receives a 35 mrem dose from one x ray that exposes 25% of the patient's body
When a .22-caliber rifle is fired, the expanding gas from the burning gunpowder creates a pressure behind the bullet. determine the average pressure of the expanding gas
The rms current in a solenoid is 0.036 A when the solenoid is connected to a 18 kHz generator. What is the peak voltage of the generator
Electrostatic interactions with neighbors cause atoms in solids to be held in place as if bound together by tiny springs. How do you arrive at that conclusion
An ideally efficient airplane engine provides work as heat flows from 1400 K burned gases to 260 K air
a charged particle (q=1.6*10^-19C) enters a mass spectrometer with a speed of 2.5*10^6m/s, compute the mass of the charged particle
A blacksmith drops a 500 g iron horseshoe into a bucket containing 25 kg of water. what is the equilibrium temperature of the system
In the notes I stated that a moving charge will have an electric field. This electric field will produce a magnetic field that is out of phase with the electric field. What is the size of the net fo
a particle with a charge of 1.60*10^-19 and a mass of 1.67*10^-27kg is found moving in a uniform magnetic field of a strength 1.50T. calculate the kineic energy of the particle
The chin-up is one exercise that can be used to strengthen the biceps muscle. How much work can the biceps muscles (one in each arm) perform in a single contraction
A 1500 kg car increases its speed from 15 m/s to 18 m/s in 15 seconds. What is the resultant work done on the car
consider a thin wire bent into the shape of a ring of radius of 10 cm that carries a steady 2.0-A current
Three applied forces, F1= 20.0 N, F2= 40.0 N and F3= 10.0 N act on an object with a mass of 2.00 kg which can move along an inclined plane. What is the amount of work done by the gravitational force
A 35-kg child rides a playground merry-go-round, standing 1.6 m from its center. What was the distance travelled by the child during this time
If an electron-positron pair with a total kinetic energy of 3.50 MeV is produced, find the frequency of the photon that produced the pair
An ideal gas expands at a constant pressure of 2.1 atm from 446 mL to 844 mL. Heat then flows out of the gas, What is the total heat flow into the gas
A 3.2-kg block of iron (c=0.11 kcal/kgoC) that has been brought to a temperature of 1,045oC is placed on top of a 2.4-kg block of ice (c=0.5 kcal/kgoC) that has been cooled to -50oC
An ideal gas expands at a constant pressure of 2.9 atm from 435 mL to 709 mL. Heat then flows out of the gas, determine the total heat flow into the gas