How can you say that one substance is different from another? Different substances have different properties; density is one property that can be used to tell two substances apart. Density is a property that does not depend on the shape or size of an object. In which state of matter are molecules moving the fastest? […]
How do you interpret optical flow?
How do you interpret optical flow? Optical flow or optic flow is the pattern of apparent motion of objects, surfaces, and edges in a visual scene caused by the relative motion between an observer and a scene. Optical flow can also be defined as the distribution of apparent velocities of movement of brightness pattern in […]
What is efficiency in physics for kids?
What is efficiency in physics for kids? The efficiency is the energy output, divided by the energy input, and expressed as a percentage. A perfect process would have an efficiency of 100%. Wout = the work or energy produced by a process. Units are Joules (J). What is project efficiency? Project Efficiency is a ratio […]
Is the state in which no thermal energy transfer occurs because both substances are at the same temperature?
Is the state in which no thermal energy transfer occurs because both substances are at the same temperature? Temperature is a measure of the average kinetic energy of the atoms or molecules in the system. The zeroth law of thermodynamics says that no heat is transferred between two objects in thermal equilibrium; therefore, they are […]
What is the perfect crash?
What is the perfect crash? The “Perfect” Crash Surviving a crash is all about kinetic energy. When your body is moving at 35 mph (56 kph), it has a certain amount of kinetic energy. After the crash, when you come to a complete stop, you will have zero kinetic energy. How does technology affect driving? […]
Why is oxygen not brittle?
What are the 3 main causes of floods?
What are the 3 main causes of floods? What Causes Floods? Top 8 Common Causes of Flooding Heavy Rains. The simplest explanation for flooding is heavy rains. Overflowing Rivers. Broken Dams. Urban Drainage Basins. Storm Surges and Tsunamis. Channels with Steep Sides. A Lack of Vegetation. Melting Snow and Ice. What are the types of […]
Which of the following is correct for full adders?
Which of the following is correct for full adders? Which of the following is correct for full adders? 1) Full adders are used to make half adders. 2) Full adders have the capability of directly adding decimal numbers. 3) In a parallel full adder, the first stage may be a half adder. 4) Full adders […]
What would a perpetual motion machine be worth?
What would a perpetual motion machine be worth? Because it cannot be constructed, because of the physical law of conservation of energy. And physical laws are not about legality. You cannot violate them, because they are basic facts about the universe. The worth of a perpetual motion machine is zero. Is the drinking bird a […]
Which is the limitation of flat plate collector from following?
Which is the limitation of flat plate collector from following? The principal disadvantage of a flat plate collector is that because of the absence of optical concentration, the area from which heat is lost is large. Also due to the same reason high temperatures cannot be attained and as a result the collection efficiency is […]