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A nearsighted person has near and far points of 11.0 cm and 20.0 cm, respectively. If she puts on contact lenses with power P=-3.00 D, what are her new near and far points?
A 13.30 kg crate is pulled by an 181N force (parallel to the incline) up a rough incline. Assume that the incline makes an angle of 31.80° with the horizontal and that the coefficient of kinetic friction is 0.436.
Two parallel plates, each having area A = 3788.0cm2 are connected to the terminals of a battery of voltage Vb = 6.0 V as shown. What is C the capacitance of this parallel plate capacitor
Two trains are traveling towards each other on parallel tracks that run diagonally Northeast to Southwest and vice versa. train A (proper length L) travels southwest to northeast and train B (proper length 2L) travels northeast to southwest.
A heat engine absorbs Qh = 3385 J of heat from a reservoir at Th = 650ºC and rejects Qc = 2660 J to a reservoir at Th = 325ºC. What is its efficiency of the heat engine
A 5 cm by 5 cm square loop of wire is rotating at 30 rpm in a uniform magnetic field of strength 3.0T. The direction of the field is perpendicular to the axis of rotation of the loop.
a 315 kg box moving at 35 ms and strikes a 155 kg box which is at rest. if the 155 kg box travels 14 m before coming to
A person pushes a 16.0 kg shopping cart at a constant velocity for a distance of 26.0m. what is the magnitude of the force that the shopper exerts
Two sounds differ in intensity level by 4.62 dB. What is the ratio of the intensities of these two sounds? (Let I1 be the intensity of the first (higher) sound and I2 be the intensity of the second (lower) sound.)
A 13 cm × 13 cm × 13 cm box containes 0.025 mol of nitrogen at 30°C. What is the rate of collisions (collisions/s) on one wall of the box
A cabin has a 0.159 m thick wooden floor ( k=0.141 W / (m x Co)) with an area of 13.4 m2. What is the rate of heat conduction through the wooden floor
The diffraction pattern shown in the figure is produced by passing laser light ( = 620 nm) through a single slit and viewing the pattern on a screen 1.84 m behind the slit, What is the width of the slit
A.) what is the average kinetic energy in joules of hydrogen atoms on the 5,500 degree celcius surface of the sun B.) What is the average KEof helium atomsin a region
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