Do lizards lay fertilized eggs? Most reptiles reproduce sexually and have internal fertilization. Males have one or two penises that pass sperm from their cloaca to the cloaca of a female. Fertilization occurs within the cloaca, and fertilized eggs leave the female’s body through the opening in the cloaca. What animals lay unfertilised eggs? Oviparity […]
What is the first step of hearing?
What is the first step of hearing? Step one: The outer part of the ear captures a sound wave and funnels it through the ear canal, where it strikes the tympanic membrane (or outer layer of the eardrum). Step two: The sound wave causes the eardrum and the three small ossicles bones within the middle […]
How can you prove air has pressure?
How can you prove air has pressure? Fountain Bottle. Wrap a lump of clay around the straw to form a seal. Blow hard into the straw—then stand back. Your blowing increases the air pressure inside the sealed bottle. This higher pressure pushes on the water and forces it up and out the straw. How do […]
What energy is lost when a ball bounces?
How did the Challenger crew actually die?
How did the Challenger crew actually die? The 37-year-old was to become the first teacher in space after being selected from more than 11,000 applicants to the NASA programme – but just 73 seconds into its flight, Challenger erupted in a ball of flame, killing all seven of the crew on board. Did they recover […]
What is the first law of thermodynamics in ecosystems?
What is the first law of thermodynamics in ecosystems? The first law of thermodynamics states that energy cannot be created or destroyed, only transformed; Energy enters an ecosystem as solar radiation, is conserved, and is lost from organisms as heat. Ecosystems are open systems, absorbing energy and mass and releasing heat and waste products. What […]
Does hot water have a higher entropy?
Does hot water have a higher entropy? The entropy increases whenever heat flows from a hot object to a cold object. It increases when ice melts, water is heated, water boils, water evaporates. The entropy increases when a gas flows from a container under high pressure into a region of lower pressure. Does cold or […]
Why do heat engines need to reject energy to environment?
Why do heat engines need to reject energy to environment? Expelling heat lets you get a positive area in your PV curve. This argument doesn’t apply to burning oil, because that’s not a cyclic process. In order to achieve this, the system dumps this extra gained entropy by giving off thermal energy to the cold […]
Is analog or digital better for sending large amounts of data?
Is analog or digital better for sending large amounts of data? Analog signals are composed of continuous waves that can have any values for frequency and amplitude. Digital signals are a more reliable form of transmitting information because an error in the amplitude or frequency value would have to be very large in order to […]
How many 12v batteries can I connect in parallel?
How many 12v batteries can I connect in parallel? Technically, there’s no limit, but there is at least one caveat… No two batteries will have EXACTLY the same terminal voltages. That means, even for two batteries hardwired together, the slightly higher-voltage one will end up ‘charging’ the slightly lower voltage one. Does resistance affect battery […]