The period of a satellite circling planet Nutron is observed to be 84 s when it is in a circular orbit with a radius of 8.0 × 10^6 m. What is the mass of planet Nutron?
a. 6.2 × 10^28 kg
b. 5.0 × 10^28 kg
c. 5.5 × 10^28 kg
d. 4.3 × 10^28 kg
e. 3.7 × 10^28 kg
d
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The figure shows two forces, each of magnitude 4.6 N, acting on an object
The angle between these forces is 40°, and they make equal angles above and below the horizontal. What third force will cause the object to be in equilibrium (acceleration equals zero)? A) 8.6 N pointing to the right B) 7.0 N pointing to the right C) 4.3 N pointing to the right D) 3.5 N pointing to the right
Charge of uniform density (20 nC/m2) is distributed over a cylindrical surface (radius = 1.0 cm), and a second coaxial surface (radius = 3.0 cm) carries a uniform charge density of ?12 nC/m2 . Determine the magnitude of the electric field at a point 4.0 cm from the symmetry axis of the two surfaces
a. 0.45 kN/C b. 1.0 kN/C c. 0.73 kN/C d. 0.56 kN/C e. 2.3 kN/C
Explain why the image seen in astronomical telescopes is inverted
What will be an ideal response?
A 2.5-kg object falls vertically downward in a viscous medium at a constant speed of 2.5 m/s. How much work is done by the force the viscous medium exerts on the object as it falls 80 cm?
a. +2.0 J b. +20 J c. ?2.0 J d. ?20 J e. +40 J