A waiter fills your water glass with ice water (containing many ice cubes) such that the liquid water is perfectly level with the rim of the glass. As the ice melts,
A) the liquid-water level decreases.
B) the liquid-water level remains flush with the rim of the glass.
C) the liquid water level rises, causing water to run down the outside of the glass.
B
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Projectile Motion: A projectile is launched with an initial velocity of 80 m/s at 30° above the horizontal. Neglecting air resistance, what is horizontal component of the projectile's acceleration?
A. 80 m/s2 B. 40 m/s2 C. 9.8 m/s2 D. 0 m/s2 E. 69 m/s2
In the formation of our Galaxy, the ________ formed first
A) planetary nebulae B) globular clusters C) spiral arms D) galactic center E) galactic disk
Answer the following statement(s) true (T) or false (F)
1. If two moving objects collide, we can always orient our reference frame so that the collision takes place entirely in the xy plane 2. An object of mass m1 moving in the +x direction collides with another object at rest with mass m2. After the collision, the object with mass m2 is observed moving in the +y direction. Such a collision cannot be elastic, no matter what m1 and m2 might be.
The distance between the object and the eyepiece of a compound microscope is 25 cm. The focal length of its objective lens is 0.20 cm and the eyepiece has a focal length of 2.6 cm. A person with a near point 25 cm is using the microscope
What is the largest angular magnification obtainable using the eyepiece alone as a magnifying lens? A) 6.5 B) 7.6 C) 8.6 D) 9.6 E) 10.6