A concave lens always produces a virtual image
Indicate whether the statement is true or false
TRUE
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A small sphere attached to a light rigid rod rotates about an axis perpendicular to and fixed to the other end of the rod. Relative to the positive direction of the axis of rotation, the angular positions of the sphere are negative, its angular velocity is negative, and its angular acceleration is positive. The sphere is
A. rotating clockwise and slowing down. B. rotating counterclockwise and slowing down. C. rotating clockwise and speeding up. D. rotating counterclockwise and speeding up. E. first rotating counterclockwise and then clockwise.
A river has a steady speed of 0.30 m/s. A student swims downstream a distance of 1.2 km and returns to the starting point. If the student swims with respect to the water at a constant speed and the downstream portion of the swim requires 20 minutes, how much time is required for the entire swim?
a. 50 minutes b. 80 minutes c. 90 minutes d. 70 minutes e. 60 minutes
A brick is resting on a rough incline as shown in the figure. The friction force acting on the brick, along the incline, is
A) zero. B) equal to the weight of the brick. C) greater than the weight of the brick. D) less than the weight of the brick.
For glucose dissolving in water at 298 K, the diffusivity is 6.9 x 10^-10m^2/s. What do you expect the diffusivity of water in glucose to be?
What will be an ideal response?