Category: Physics

How many red blood cells and white blood cells are in a single drop of blood? RED BLOOD CELLS (erythrocytes) HOW MANY IN A DROP: 333,000 to 500,000. How many white blood cells are in the human body? The normal number of WBCs in the blood is 4,500 to 11,000 WBCs per microliter (4.5 to […]

What is the major impact of nanotechnology on society? The societal impacts of new technologies are easy to identify but hard to measure or predict. Nanotechnology will have significant social impacts in the areas of military applications, intellectual property issues, as well as having an effect on labor and the balance between citizens and governments. […]

What is the hottest rainforest on earth? Tropical rainforests often have from 160 to 400 inches of rain a year. But they aren’t the wettest or even the hottest places on Earth. (The wettest is Mount Waialeale, in Hawaii, USA, and the hottest is Libya in North Africa.) What is the environment like in a […]

How does photon interact with matter? Photons interact differently in matter than charged particles because photons have no electrical charge. give up their energy via secondary interactions (mostly ionization). The interaction of photons with matter is probabilistic, while the interaction of charged particles is certain. What happens if an incident photon collides with a moving […]

How does a roller coaster go up a hill? A roller coaster does not have an engine to generate energy. The climb up the first hill is accomplished by a lift or cable that pulls the train up. The higher the hill the coaster is coming down, the more kinetic energy is available to push […]

What is the difference between SAR and radar? SAR uses the motion of the radar antenna over a target region to provide finer spatial resolution than conventional beam-scanning radars. Additionally, SAR has the property of having larger apertures for more distant objects, allowing consistent spatial resolution over a range of viewing distances. What is the […]

Is Type 1 or 2 error worse? Of course you wouldn’t want to let a guilty person off the hook, but most people would say that sentencing an innocent person to such punishment is a worse consequence. Hence, many textbooks and instructors will say that the Type 1 (false positive) is worse than a Type […]

What are the 4 types of plate boundary? Plate Boundaries and Hotspot Demonstration Divergent Plate Boundary. Volcanic eruptions and shallow earthquakes are common where plates rip apart. Convergent Plate Boundary. Transform Plate Boundary. Hotspot. What are the 5 plate boundaries? What are the major plate tectonic boundaries? Divergent: extensional; the plates move apart. Spreading ridges, […]

How do you calculate isothermal compression? It is also worth noting that for ideal gases, if the temperature is held constant, the internal energy of the system also is constant, and so ΔU = 0. Since the First Law of Thermodynamics states that ΔU = Q + W (IUPAC convention), it follows that Q = […]

Is normal force a centripetal force? The normal force and a component of the weight point toward the center of the loop (the component perpendicular to the loop), so they get to be the centripetal force. How is centripetal force calculated? Centripetal force is measured in Newtons and is calculated as the mass (in kg), […]