2. An inverted image of an object is viewed on a screen from the side facing a converging lens. An opaque card is then introduced covering only the upper half of the lens. What happens to the image on the screen?
Hydraulic engineers often use, as a unit of volume of water, the acre-foot, defined as the volume of water that will cover 1 acre of land to a depth of 1 ft. A severe thunderstorm dumps 1.5 in. of rain in 30 min on a town of area 38 km2. What volume of water, in acre-feet, fell on the town?
What is the circular velocity of an Earth satellite 700 km above Earth's surface? (Hint: Earth's radius is 6380 km.)
Quiz 8 part-2
A Hill that has a 12.0% grade is one that rises 12.0m vertically for every 100.0 m of distance in the horizontal direction. At what angle is such a hill inclined above the horizontal?
2ZnS + 3O2 2ZnO + 2SO2. Suppose that you wanted enough O2 to completely react with 500. g of ZnS. What mass of O2 should be present?
See atthached file and give simple short answers.
Find the heat flow during a time period of 5.00 hours through a glass window, whose thickness is 0.15 in. with an area of 35.00 square feet, if the average outer surface temperature is 22.00 degrees fahrenheit.
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1. Can you show me step by step how to solve this problem?:
- The Earth’s rate of rotation is constantly decreasing, causing the day to increase in duration. In the year 2000 the Earth takes about 0.548 s longer to complete 365 revolutions than it did in the year 1900.
- (a) What is the average angular acceleration of the Earth?
- (b) If this average acceleration remains constant, in what year will the Earths rotation come to rest?
2. I do not understand this Ideal Gas Law and Kinetic Theory question. Can you help me set it up?
- A spherical balloon is made from a material whose mass is 3.00-kg. The thickness of the material is negligible compared to the 1.5-m radius of the balloon. The balloon is filled with helium (He) at a temperature of 305-degrees K and just floats in the air, neither rising nor falling. The density of the surrounding air is 1.19-kg/m^3. Find the absolute pressure of the helium gas