What is the type of rock formed from lava that cools quickly? When lava comes out of a volcano and solidifies into extrusive igneous rock, also called volcanic, the rock cools very quickly. Crystals inside solid volcanic rocks are small because they do not have much time to form until the rock cools all the […]
Is it OK for a 12 year old to drink alcohol?
Is it OK for a 12 year old to drink alcohol? Children who drink alcohol can act drunk, just like adults do. They might stagger when they walk, speak without making sense, or seem sleepy. They might vomit because alcohol can irritate the stomach. Breathing and heart rate might slow down to a dangerous level. […]
What does the area under the stress strain curve represent?
What does the area under the stress strain curve represent? Thus, the area under the engineering stress-strain curve is a direct measure of the amount of work per unit volume of the material needed to effect a given engineering strain ε. How do you calculate fracture energy from a stress strain curve? Fracture energy = […]
How much power does a vertical wind turbine produce?
How much power does a vertical wind turbine produce? Computers control the pitch of the blades and the direction they point to produce maximum power. Most onshore wind turbines today are rated at 2.5-3 MW (megawatts), with blades of about 50m in length, about half the length of a football field. What are two advantages […]
What should you do when there is a vehicle coming from the opposite direction in your lane?
What should you do when there is a vehicle coming from the opposite direction in your lane? A vehicle is approaching from the opposite direction, going straight ahead. You must wait for approaching traffic to go through before you turn. What is considered an improper turn? An improper turn can be a U-turn or left […]
What is the main component in glass?
What is the main component in glass? silicon dioxide What are the 3 main ingredients of glass? Ingredients for making glass Sand or Silica. The main ingredient of glass making is Silica, which as a very high melting point of over 2,000 deg C. Sodium Carbonate. Lime or Calcium Oxide. Other Additives. Colour Additives A […]
How do you compensate casting shrinkage?
How do you compensate casting shrinkage? Prevent shrinkage cavities by improving casting structure Design a running (gate) system with risers that ensure a continuous flow of molten metal. Increase local heat dissipation by inserting internal chills, cooling ribs or cooling coils. Reduce casting temperature to limit the total volume deficit. What are the three steps […]
Should both heater hoses be hot?
Should both heater hoses be hot? Cabin heat comes from hot coolant, so drive long enough to warm up the engine. If coolant temperature is acceptable, feel both heater hoses, which should be hot. Which component of the A C system will feel hot to the touch when the system is operating? What component of […]
How can we reduce sulfur dioxide emissions from coal burning power stations?
How can we reduce sulfur dioxide emissions from coal burning power stations? Reducing Pollution One option is to use coal that contains less sulfur. Another option is to “wash” the coal to remove some of the sulfur. The power plant can also install equipment called scrubbers, which remove the sulfur dioxide from gases leaving the […]
What are the examples of flow measurement techniques that use obstruction?
What are the examples of flow measurement techniques that use obstruction? A common method of measuring flow through an open channel is to measure the height of the liquid as it passes over an obstruction as a flume or weir in the channel. Common used is the Sharp-Crested Weir, the V-Notch Weir, the Cipolletti weir, […]