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A crate of mass 10.6 kg is pulled up a rough incline with an initial speed of 1.54 m/s. The pulling force is 92 N parallel to the incline, which makes an angle of 20.2° with the horizontal. The
A sled of mass m is given a kick on a frozen pond. The kick imparts to it an initial speed of 2.80 m/s. The coefficient of kinetic friction between sled and ice is 0.105. Use energy considerations t
Under what limits does the field of a uniformly charged disk match the field of a uniformly charged infinite sheet? The radius approaches infinity; the distance from the disk approaches zero. The ra
Which describes an electric field vector and an electric field line? The vector has no certain orientation to the field line. The vector is perpendicular to the field line. The vector is tangent to
A positive test charge experiences an electrostatic force in the negative direction of an axis. What is the direction of the electric field at the location of the test charge? along the axis, in the
A silvered sphere is used as a christmas tree ornament has a diameter of 0.08 m. A girl holds the ornament 0.2m from her eye. Where does she see the image of her eye? What is the ratio of the height
The prescribed powers (in diopters) for the bifocals are +0.80 and -1.60, and these bifocals give the patient normal vision. (a) Without the bifocals, what is the patient's near point? (b) Without t
A hollow metal sphere has a total charge of 50 µC. If the radius of the sphere is 50 cm, the electric field intensity at a distance of 3.0 m from the surface of the sphere is approximately----
A uniform electric field has magnitude E = 200 N/C and is directed to the right. A particle with charge +3.7 nC moves along the straight line from a to b. distance is .25m (a) What is the electric f
Your idea requires that electrons, when released from rest at one of the plates, reach the other plate at the speed of 1.83% of the speed of light. (The speed of light is c = 3.00 × 108 m/s.)
A patient has a far point of 39.5 cm and a near point of 21.4 cm. What power (in diopters) should be prescribed to correct the patient's vision using: contact lens?
If the potential difference between the cathode and anode is reduced from 12.0 kV to 5.8 kV, with what speed will the electrons reach the anode?
An object having a mass of 10.0g and a charge of +8.00 x 10^-5 C is placed in an electric field E with Ex = 3.00 x 10^3 N/C, Ey = -66N/C and Ez = 0. (a). What are the magnitude and direction of the
The electric field on the axis of a uniformly charged ring has magnitude 390kN/C at a point 6.2cm from the ring center. The magnitude 18cm from the center is 140kN/C ; in both cases the field points
suppose the mirror is convex. the distance between the image is the same as in part (a), but the image is 0.500 the size of the object. determine the focal length of the mirror.
What is the capacitance? What is the potential difference between the plates? What is the magnitude of the electric field between the plates?
A large parallel plate capacitor has plate separation of 0.92 cm and plate area of 266 cm2. The capacitor is connected across a voltage of 17.7 V and has air between the plates. How much work is don
A helicopter's velocity is given as v(t) = [-2t+100]m/s. Determine the position and acceleration functions given that x(0) = 9m. Also determine when the helicopter will reach it's maximum height &a
The cylindrical imaging drum of a photocopier is to have an electric field just outside its surface of 2.00 105 N/C.
A point charge of 10 µC is located at x = -3.0 cm, and a second point charge of -12 µC is located at x = +4.0 cm. Where should a third charge of +6.0 µC be placed so that the elect
A point charge of +6.90 µC is located on the x-axis at x = 6.00 m, next to a spherical surface of radius 5.00 m centered at the origin. (a) Calculate the magnitude of the electric field at x =
An electron and a proton are initially very far apart (effectively an infinite distance apart). They are then brought together to form a hydrogen atom, in which the electron orbits the proton at an
An 55.0-N crate of apples sits at rest on a ramp that runs from the ground to the bed of a truck. The ramp is inclined at 18.0° to the ground. (a) What is the normal force exerted on the crate
Assume that the star is a perfect blackbody, and that the average temperature of the rest of the universe is 2.73 K. Do not consider thermal radiation absorbed by the star from the rest of the unive
An ideal gas is taken through a Carnot cycle. The isothermal expansion occurs at 250 °C, and the isothemal compression occurs at 50 °C. If the heat absorbed during the isothermal expansion i