Category: Physics

What is the main function of the dermis? The dermis is a fibrous structure composed of collagen, elastic tissue, and other extracellular components that includes vasculature, nerve endings, hair follicles, and glands. The role of the dermis is to support and protect the skin and deeper layers, assist in thermoregulation, and aid in sensation. What […]

Is landslide a natural disaster or man made? Landslides are more widespread than any other geological event. They are defined as downslope transport of soil and rock resulting from natural phenomena or man made actions. There can be different types of movements: falls, slides, topples, lateral spread, and flows. Is a major cause of landslides […]

What are different phases of steel? Whilst there are many structures or mixtures of structures, there are only three phases involved in any steel; ferrite, cementite and austenite. The area denoted as austenite in Figure 3 is an area within which iron can retain much dissolved carbon. Which is the hardest form of steel? Steel […]

How are bimetallic strips useful? use in thermometers The bimetallic strip constitutes one of the most trouble-free and durable thermometers. It is simply two strips of different metals bonded together and held at one end. When heated, the two strips expand at different rates, resulting in a bending effect that is used to measure… What […]

Which stage of pregnancy is the longest? Elephants. Elephants have the longest gestation period of all mammals, carrying their young for 18 to 22 months before giving birth. How can you tell if your baby is abnormal? An ultrasound creates pictures of the baby. This test is usually completed around 18–20 weeks of pregnancy. The […]

Which part of an atom has the least mass? The majority of an atoms’ mass comes from the protons and neutrons that make up its nucleus. Electrons are the least massive of an atom’s constituent particles, with a mass of 9.11 x 10-31 kg and a size too small to be measured by current techniques. […]

What triggers Brugada? Brugada Syndrome is caused mainly by mutations in the SCN5A gene which encodes the α-subunit of the voltage-gated Nav1. 5, the cardiac sodium channel responsible for regulating rapid sodium current –INa-. It induces a disturbed functioning of sodium channel subunits or proteins that regulate them. Is Brugada a syndrome? Brugada syndrome is […]

How can you determine acceleration from a velocity time graph? Acceleration can be calculated by dividing the change in velocity (measured in metres per second) by the time taken for the change (in seconds). The units of acceleration are m/s/s or m/s 2. How do you find maximum velocity on a acceleration time graph? The […]

Is Carnot a cycle? The Carnot cycle consists of the following four processes: A reversible isothermal gas expansion process. In this process, the ideal gas in the system absorbs qin amount heat from a heat source at a high temperature Thigh, expands and does work on surroundings….T-S Diagram. Process ΔT ΔS IV Thigh−Tlow 0 Full […]

Is Magma more dense than the crust? In fact, it can get so hot that the rocks that make up the crust can actually begin to melt. This molten material is called magma. It is less dense than the surrounding rock so it tends to move upwards through the crust. Magma also comes from material […]