What do we know about the direction of momentum?
a. It has the same direction as the object's speed.
b. It has the same direction as the object's acceleration.
c. It has the same direction as the object's weight.
d. It has the opposite direction to the object's velocity.
e. It has the same direction as the object's velocity.
e
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The distance between the object to be viewed and the eyepiece of a compound microscope is 18.0 cm
The focal length of its objective lens is 0.80 cm and the eyepiece has a focal length of 2.3 cm. The near-point distance of the person using the microscope is 25.0 cm. What is the magnitude of the total magnification of the microscope if it is designed for minimum eyestrain? A) 120 B) 184 C) 200 D) 360 E) 480
The following items are positioned in sequence: A source of a beam of natural light of intensity I0, three ideal polarizers A, B, and C; and an observer. Polarizer axis angles are measured clockwise from the vertical, as viewed by the observer
The axis angle of polarizer A is set at 0° (vertical), and the axis angle of polarizer C is set at 50°. Polarizer B is set so that the beam intensity is zero at the observer. What are the two possible axis angle settings (less than 180°) of polarizer B? A) 40° and 90° B) 40° and 130° C) 40° and 140° D) 90° and 130° E) 90° and 140°
In an exothermic reaction, bonds may be broken
What will be an ideal response?
Of vectors with lengths 5 m, 3 m, and 4 m, which has the greatest magnitude x component?
a. the one with length 5 m c. the one with length 4 m b. the one with length 3 m d. It could be any of the three.