What do we mean by the orbital energy of an orbiting object (such as a planet, moon, or satellite)?
A) Orbital energy is the sum of the object's kinetic energy and its gravitational potential energy as it moves through its orbit.
B) Orbital energy is the object's kinetic energy as it moves through its orbit.
C) Orbital energy is a measure of the object's speed as it moves through its orbit.
D) Orbital energy is the amount of energy required for the object to leave orbit and escape into space.
A
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A 600-kg car makes a 90° turn. Its speed before the turn is 21.0 m/s and after the turn it is 24.0 m/s. What is the magnitude of the change in the car's momentum during the turn?
A) 19.1 × 103 kg?m/s B) 10.2 × 103 kg?m/s C) 9.55 × 103 kg?m/s D) 12.0 × 103 kg?m/s E) 22.2 × 103 kg?m/s
Mineral sample #4 is ________.
Sphalerite - ZnS Apatite - Ca5(PO4)3(F,Cl,OH) Goethite - ?-FeO(OH)
Four identical point charges (+4.0 ?C) are placed at the corners of a square which has 20-cm sides. How much work is required to assemble this charge arrangement starting with each of the charges a very large distance from any of the other charges?
A. +2.9 J B. +3.9 J C. +2.2 J D. +4.3 J E. +1.9 J
A wire along the z-axis carries a current of 6.8 A in the +z direction. Find the magnitude and direction of the force exerted on a 6.1-cm long length of the wire by a uniform magnetic field with magnitude 0.36 T in the -x direction
What will be an ideal response?