What is the best design for a CO2 dragster? Sphere – A very good aerodynamic shape because of it symmetrical shape. Which allows air to flow over it’s surface with very little disruption to the air stream. A combination of basic shapes will yield the best results. What makes a CO2 car fast? Aerodynamics, thrust-to-weight […]
What kind of metal are metal roofs made of?
What kind of metal are metal roofs made of? Five of the most common materials used in metal roofing are Galvalume®, aluminum, zinc, copper, and stainless steel. Are metal roofs aluminum or steel? Commercial and residential metal roofing is primarily made of steel or aluminum. There are two types of metallic coatings used: galvanized, which […]
What parts make up a staircase?
What parts make up a staircase? Staircases Inner (closed) string. Outer (open) string. Tread. Riser. Newel post. Balusters (Spindles). How are newel posts attached? We often get the question, “How are Newel Posts Attached?” Newel Posts are mainly attached by either drilling the post to the floor boards using brackets or by using a threaded […]
What are the 4 types of natural hazards?
What are the 4 types of natural hazards? Natural hazards are naturally occurring physical phenomena caused either by rapid or slow onset events which can be geophysical (earthquakes, landslides, tsunamis and volcanic activity), hydrological (avalanches and floods), climatological (extreme temperatures, drought and wildfires), meteorological (cyclones and … What are some natural hazards that affect humans? […]
Why do plants that live in the forest floor have big leaves?
Why do plants that live in the forest floor have big leaves? plants of the forest floor need large broad leaves to capture as much of the filtered sunlight as possible. cacti are plants that live in extremely dry environments. Not having leaves helps cacti conserve water for photosynthesis. Photosynthesis occurs in the thick stems […]
Is tire rotation direction important?
Is tire rotation direction important? Installing and Rotating On directional tires, there’s an arrow on the sidewall of the tires — when correctly mounted, the arrow points toward the front of the vehicle. If directional tires get mounted backward, you won’t get the hydroplaning resistance and other performance driving benefits the tread is designed for. […]
What is the ASTM grain size number?
What is the ASTM grain size number? ASTM grain size number : the ASTM grain size number, G, is defined as : NAE = 2G-1 where NAE is the number of grains per square inch at 100X magnification. Most metals are crystalline in nature and contain internal boundaries, commonly known as “grain boundaries”. Does […]
What is an orthogonal cutting operation?
What is an orthogonal cutting operation? What is an orthogonal cutting operation? Orthogonal cutting involves the use of a wedge-shaped tool in which the cutting edge is perpendicular to the direction of speed motion into the work material. What are the effects of lowering the friction at the tool chip interface on the mechanics of […]
What does the Zeroth Law of Thermodynamics concern?
What does the Zeroth Law of Thermodynamics concern? The Zeroth Law of Thermodynamics states that if two bodies are each in thermal equilibrium with some third body, then they are also in equilibrium with each other. This says in essence that the three bodies are all the same temperature. What does Zeroth law state? The […]