Pebbles of granite are very common in a conglomerate, whereas pebbles of marble are relatively uncommon. Why is this? What are the properties of the different minerals in these rocks?
What will be an ideal response?
Answer: Granite is predominantly composed of quartz and feldspar minerals. These minerals (especially quartz) are very resistant to weathering. Conversely, marble is metamorphosed limestone. Even though marble is hard and durable as a building stone it does succumb to weathering. With time, marble may dissolve from the conglomerate.
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Constant Acceleration Kinematics: A car with good tires on a dry road can decelerate (slow down) at a steady rate of about 5.0 m/s2 when braking. If a car is initially traveling at 55 mi/h(a) how much time does it take the car to stop?(b) what is its stopping distance?
Fill in the blank(s) with the appropriate word(s).
When light is either reflected or refracted, the quantity that does not change in either process is its
A. direction of travel. B. dispersion. C. frequency. D. speed. E. wavelength.
A porch roof sloping at 45° accumulated snow to a depth of 30. cm. The roof measured 3.0 m × 5.0 m. If the density of snow was 15. kg/ m2, what was the weight of the snow, in pounds, on the roof?
A) 210 lb B) 74 lb C) 56 lb D) 148 lb E) 105 lb
Which is the BEST description of what causes tides?
a. Tides are caused by the Moon's gravitational pull on the Earth. b. Tides are caused by earthquakes. c. Tides are caused by the rotation of the Earth. d. Tides are caused by the gravitational pull of the Earth-Moon system. e. Tides are caused by the Earth's gravitational pull on the Moon.