Category: Physics

What is the power of an appliance? The power of an electrical appliance tells us how much electrical energy it transfers in a second. Power, P is measured in watts (W) where: 1 W = 1 J/s (joule/second). Appliances used for heating have a much higher rating than those used to produce light or sound. […]

Why does a straw look bigger in water? Place a straw in a glass of water, and behold: It looks broken. But below, when the light also travels through water, the refraction causes the image of the straw to be in a slightly different location. The water also acts as a type of magnifying lens, […]

What are the features of a sedimentary rock? Sedimentary rocks contain rounded grains in layers. The oldest layers are at the bottom and the youngest layers are at the top. Sedimentary rocks may contain fossils of animals and plants trapped in the sediments as the rock was formed. What type of minerals are found in […]

Are darkroom chemicals dangerous? The majority of chemicals used in the black and white darkroom are classified in the range of non-toxic to slightly toxic. However, black and white developers can be toxic, especially if when ingested or inhaled or when in contact with bare skin. Are the chemicals used to develop film Toxic? Most […]

Why is current constant in a circuit? The electrons at the end of the circuit are of the same amount and of course of the same charge. Just as the battery speeds up an electron, the electron hits to another one and remains constant speed. Why is voltage constant in parallel? The voltage is the […]

What happens to the pattern if we try to determine which slit the electron goes through by using a laser placed directly behind the slits? What happens to the pattern if we try to determine which slit the electron goes through by using a laser placed directly behind the slits? If the rate of electrons […]

What are the five characteristics of ionic compounds? Properties Shared by Ionic Compounds They form crystals. They have high melting points and high boiling points. They have higher enthalpies of fusion and vaporization than molecular compounds. They’re hard and brittle. They conduct electricity when they are dissolved in water. They’re good insulators. How can you […]

How much horsepower does a barge have? Power from their diesel engines ranges from 600 to over 10,000 horsepower. River barges also have flat bottoms and are usually 200′ long and 35′ wide. What is the most powerful tugboat in the world? FUN FACT: While the 309.6t bollard pull of the ALP Striker is surely […]

What are the 7 hormones? Hormones produced by the pituitary gland Adrenocorticotrophic hormone (ACTH) Thyroid-stimulating hormone (TSH) Luteinising hormone (LH) Follicle-stimulating hormone (FSH) Prolactin (PRL) Growth hormone (GH) Melanocyte-stimulating hormone (MSH) What are the 3 main functions of the endocrine system? What Does the Endocrine System Do? Endocrine glands release hormones into the bloodstream. The […]

What element is a good insulator? Examples of good conductors are sliver, tin, and lead. Good insulators contain 8 electrons which mean they are stable(noble gasses group 18). Insulators can’t be easily transported from one atom to another and nonmetals make good insulators. Three examples of good insulators are sulfur, silicon, and rubber. What makes […]