The amplitude of a wave is the distance between two successive peaks. True or False True False

When a massive star exhausts its available supply of hydrogen fuel, it then becomes a supernova. True or False True False

Why can stars be used as markers for navigation? Because they are stationary in the universe, they are easy to find and follow. Because they are so far away from Earth , they don't appear to move very much in the night sky even though they are moving. Because they are mythological creatures, we can follow their movements. Because they will be around forever, we can always use them to tell directions.

A radioactive isotope has a half-life of 13 hours. Find the amount of the isotope left from a 400 -milligram sample after 52 hours. If necessary, round your answer to the nearest thousandth. 12.5 mg 25 mg 7.692 mg 0.049 mg

How does Bohr's model overcome the issue of radiation from accelerating electrons? By allowing only certain orbits where no radiation occurs By assuming electrons are massless By using a relativistic speed correction By eliminating the concept of electron movement

The first law of thermodynamics and the law of conservation of matter are similar in that __ both energy and matter are recycled through biological systems. both energy and matter flow in a one-way path through biological systems. under normal circumstances energy and matter are destroyed as they pass through biological systems. under normal circumstances neither energy nor matter is created nor destroyed. The first law of thermodynamics and the law of conservation of matter are not similar.

What is true of using the scientific method in astronomy? The first step of the scientific method is collecting information by using tools such as telescopes and spaceships. We don't use the scientific method in astronomy because we can't do the experiment phase. It gives us a good guess of what is going on in the cosmos but isn't backed by evidence. We can't make any conclusions based on the evidence we have collected from space exploration.

014 100 points Find the total translational kinetic energy of 3 L of oxygen gas held at a temperature of 9^circ C and a pressure of 0.5 atm.

A certain substance has a half-life of 8 weeks. How many grams of a 10 -gram sample will be remaining after 2 weeks? Round to 2 decimal places. Answer square

What happens to matter when energy changes?

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Newton's laws of motior fail: when dealing with extremely low masses. for objects with extremely large masses. when using atomic clocks rather than stopwatches. at speeds significantly less than the speed of light. in helping us understand most of the everyday world.

A radioactive substance decays exponentially. A scientist begins with 140 milligrams of a radioactive substance. After 24 hours 70 mg of the substance remains. How many milligrams will remain after 27 hours? $\square $ mg Give your answer accurate to at least one decimal place Question Help: Video

The branch of biomechanics that deals with the aspects of moving systems is known as dynamics. kinetics. mobility. kinematics.

When a forklift is loaded, where is its center of gravity? A. Under the operator B. At the center of the forklift C. Varies based on the combined centers of gravity of the forklift and the load D. At the center of the forks

Which of these statements is most likely correct about a weak nuclear force? (2 points) It binds electrons and protons. It is a repulsive force. It is an attractive force. It binds protons and neutrons.

Which side of the electromagnetic spectrum has shorter waveiengths? $\square $ Which side of the electromagnetic spectrum has higher energy? $\square $ Which side of the electromagnetic spectrum has higher frequencies? $\square $ blue

Living and Nonliving substances obey all of the answers the 1st law of thermodynamics. the 2nd law of thermodynamics. the law of gravity.

Physics is explicitly involved in studying which of these activities? A. the mixing of metals to form an alloy B. the metabolic functions of a living organism C. the motion of a spacecraft under gravitational influence D. the depletion of the atmospheric ozone layer due to pollutants E. the killing of cancerous cells by radiation therapy

Outdoors, shadows are longest at what time of day? Midnight Sunrise and sunset Noon 10 a.m.

Whose laws of motion became the basic building blocks for our understanding of the functioning of the universe? Johannes Gutenberg Martin Luther Isaac Newton Francis Bacon Rewatch