What is a mineral?
What will be an ideal response?
A mineral is a naturally formed, inorganic, crystalline solid with an ordered arrangement of atoms and a specific chemical composition
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An air-track cart is attached to a spring and completes one oscillation every 5.67 s. At t = 0 s the cart is released at a distance of 0.250 m from its equilibrium position. What is the position of the cart when t = 29.6 s?
A) x = 0.0460 m B) x = 0.210 m C) x = 0.218 m D) x = 0.342 m E) x = -0.218 m
Bottles of perfume sometimes have thick glass (n = 1.5) walls which give the impression the volume is larger than it really is. Assume a cylindrical bottle with an inner radius of 1.0 cm and an outer radius of 2.0 cm. What percentage of the apparent volume is the real volume?
a. 95% b. 60% c. 80% d. 64% e. 75%
A two-shell-eight-tube-pass heat exchanger condenses 3 kg/s of ammonia at 45ºC using 65 kg/s of water at 20ºC. If the ammonia enters as saturated vapor, leaves as saturated liquid, and has a heat of vaporization of 1078 kJ/kg, determine (a) outlet water temperature and (b) heat exchanger effectiveness.
What will be an ideal response?
A gravitational field is NOT:
a. always the same regardless of how the objects move. b. measured in newtons. c. a vector field. d. a field that has both size and direction. e. imaginary.