Determine which of the following objects obey the equations of projectile motion developed in this chapter
i. A ball is thrown in an arbitrary direction.
ii. A jet airplane crosses the sky with its engines thrusting the plane forward.
iii. A rocket leaves the launch pad.
iv. A rocket moving through the sky after its engines have failed.
v. A stone is thrown underwater.
1.(i) and (v) only
2.(ii), (iii) and (iv) only
3.(i) and (iv) only
4.All of them obey the equations of projectile motion.
3
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Conductors: A conductor is placed in a steady external electric field. Which of the following statements are correct for this situation? (There could be more than one correct choice.)
A. The electric field is zero inside the conductor. B. All the free electrons go to the surface of the conductor. C. The surface of the conductor is neutral. D. The electric field just outside the surface of the conductor is perpendicular to the surface. E. None of these statements are correct.
Compared to the density of water, the density of a fish is
A) more. B) less. C) the same.
Does the universe have an edge or a center?
What will be an ideal response?
A flat circular coil having 16 turns, each of diameter 20 cm, is in a uniform and steady 0.13-T magnetic field
(a) Find the total magnetic flux through the coil when the field is perpendicular to the plane of the coil. (b) If the coil is rotated in 10 ms so its plane is parallel to the field, find the average induced emf in the coil.