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The far point of a myopic administrator is 45.5 cm. (Assume a 2.0 cm distance between retina and lens.)
(a) What is the relaxed power of his eyes? I got 52.2 D which is correct
(b) If he has the normal 7.80% ability to accommodate, what is the closest object he can see clearly?
Coal is combusted in a steam boiler. The specific coal contains 25 MJ/kg, If the boiler is 90% efficient, how much coal must be burned per hour to produce a stream thermal gain of 665 MJ/s. Roughly how much CO2 will be produced by this boiler?
A grinding wheel in the shape of a solid disk is0.240 {\rm m} in diameter and has a massof 2.50 {\rm kg}. The wheel is rotating at2050 {\rm rpm} about an axis through itscenter. What is its kinetic energy?
The 200 g head of a golf club moves at 40 m/s in a circular ARC of 1.2 m radius. How much force must the player exert on the handle of the club to prevent it from flying out of her hands at the bottom of swing? Ignore the mass of the club's shaft.
At one instant a bicyclist is 35.0m due east of a park's flagpole, going due south with a speed of 20 m/s. Then, 19 s later, the cyclist is 60.0 m due north of the flagpole, going due east with the speed of 11 m/s. For the cyclist in this 19s inte..
Define vectors, forces and gravitaional force
consider a beam of light that passes through two small parallel slits and shines on a screen. will the intensity of the
If a lab student determines the coeffient of linear expansion of aluminum is 26.4 x 10-6, what is that student's percent error for the experiment
What is the magnitude of the free-fall acceleration of a ball (mass m) due to the Earth's gravity at an altitude of 7R, where R is the radius of the Earth
a contact lens is made of plastic with an index of refraction of 1.36. the lens has an outer radius of curvature of
A 4.00 kg model rocket is launched, expelling 46 g of burned fuel from its exhaust at a speed of 590m/s. What is the velocity of rocket after the fuel has burned? Hint: overlook the external forces of gravity and air resistance.
on a cool morning when the temperature is 10 degrees celsius you measure the pressure in your cars tires to be 30 psi.
A Bead with a mass 10g can slide without friction on a circular motion massless hoop that is in a vertical plane and has a radius of 5 cm. The hoop rotates at a constant rate of 4rev/s about a vertical diameter.
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