Category: Physics

Where does 90 of energy go? Notice that at each level of the food chain, about 90% of the energy is lost in the form of heat. The total energy passed from one level to the next is only about one-tenth of the energy received from the previous organism. Why do food chains have 3 […]

What is the acceleration of a 10 kg mass? for a mass m = 10kg on Earth it`s weight is W = mg = 10 x 10 = 100N. However, in space where g = 0m/s2 this objects weight is W = mg = 10 x 0 = 0N whereas its mass still remains 10kg. […]

Are S or P waves faster? P waves travel fastest and are the first to arrive from the earthquake. In S or shear waves, rock oscillates perpendicular to the direction of wave propagation. In rock, S waves generally travel about 60% the speed of P waves, and the S wave always arrives after the P […]

Does acceleration increase velocity? Sure, as long as acceleration is positive, velocity increases, even if acceleration is decreasing (as long as it doesn’t reach zero). Likewise, as long as acceleration is negative, velocity decreases even if acceleration is increasing. What is the meaning of rate of acceleration? Acceleration, rate at which velocity changes with time, […]

Does higher SPF matter? High-SPF products don’t give you a whole lot more protection. But the truth is that higher-SPF products are only marginally better at shielding you from UVB, according to both the EWG and the Skin Cancer Foundation. SPF 30 blocks nearly 97% of UVB radiation, SPF 50 blocks about 98%, and SPF […]

How can I make my presentation stand out? 17 Killer Presentations Tips for Students Who Want to Stand out Surprise them, Talk to a Cartoon. This is a pretty amazing trick I’ve used in the past and it’s bound to shock any audience. Don’t Read. PowerPoint was created to show bullets and short text. Pump […]

Can you kill a black bear in Louisiana? It is illegal to kill Louisiana black bears. The Louisiana black bear is one of 16 subspecies of American black bear. Habitat loss and overhunting led advocates to petition for the species to be listed under the Endangered Species Act. Is there a bear season in Louisiana? […]

What are the 3 lenses on a microscope? Most compound microscopes come with interchangeable lenses known as objective lenses. Objective lenses come in various magnification powers, with the most common being 4x, 10x, 40x, and 100x, also known as scanning, low power, high power, and (typically) oil immersion objectives, respectively. How does oil improve resolution? […]

Which mode of heat transfer is fastest? Radiation What is the most dangerous type of radiation? Gamma rays Which is the most powerful radiation? What are the three major types of radiation? There are four major types of radiation: alpha, beta, neutrons, and electromagnetic waves such as gamma rays. They differ in mass, energy and […]

Can gas giants support life? Smaller Gas Giants Could Support Life. Mini-Neptunes typically form far from their host star, with ice molecules joining with hydrogen and helium gases in great quantity to form icy/rocky cores surrounded by massive gaseous atmospheres. Are gas giants cold? Cold gas giants A cold hydrogen-rich gas giant more massive than […]