Inside the same room, buoyant force is greater on
A) a helium-filled party balloon.
B) an elephant.
C) both the same
Answer: B
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You are making macaroni and cheese for dinner, again. Which is the best choice for stirring the noodles in the pot of boiling water?
A. a wooden spoon B. a metal spoon C. any kind of spoon D. your finger, but really fast
Which of the following features of a telescope determines its light-gathering power?
A) The magnifying power of the objective B) The diameter of the primary mirror C) The focal length of the eyepiece D) The length of the telescope tube
Rotational Kinetic Energy: A ball in the shape of a uniform spherical shell (like a soccer ball) of mass 1.5 kg and radius 15 cm rolls down a 35° incline that is 6.0 m high, measured vertically. The ball starts from rest, and there is enough friction on the incline to prevent slipping of the ball.(a) How fast is the ball moving forward when it reaches the bottom of the incline, and what is its angular speed at that instant?(b) If there were no friction on the incline, how fast would the ball be moving forward and what would be its angular speed at the bottom?
What will be an ideal response?
The bond between carbon atoms in the molecule ethylene, H2C=CH2 is referred to as
A) an ionic bond B) a double bond C) a single bond D) a triple bond