Relative Velocity: A boat, whose speed in still water is 1.75 m/s, must aim upstream at an angle of 26.3° (with respect to a line perpendicular to the shore) in order to travel directly across the stream.(a) What is the speed of the current?(b) What is the resultant speed of the boat with respect to the shore?
What will be an ideal response?
(a) 0.775 m/s (b) 1.57 m/s
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Resolution: The world's largest refracting telescope is operated at the Yerkes Observatory in Wisconsin. It has an objective lens of diameter of 1.02 m. Suppose such an instrument were mounted on a satellite at an elevation of 300 km above the ground and used to map surface details. If the telescope is forming images with light of wavelength 550 nm, what is the minimum separation of two objects on the ground whose separation could be clearly resolved by this lens?
Fill in the blank(s) with the appropriate word(s).
With ______, the designer must change the image manually, such as by erasing a portion or increasing the size of the image.
A. frame-by-frame animation B. animation with scripting C. animation with tweening D. cel-by-cel animation
Which force field can increase a moving electron's speed?
A) electric field B) magnetic field C) both of these D) neither of these
Acetic acid consists of a(n) ______________ group attached to a carboxyl group
a. amino b. methyl c. hydroxyl d. ethyl