An 8 m long uniform plank of mass 140 kg rests on the side of a pirate ship with 3 meters extended over the edge. How far can a 60 kg prisoner venture past the odge of the ship on the plank before the plank just begins to tip? Please select the correct answer from the choices shown below: A. 1,5 m B. 1.67 m C. 2 m D. 2.33 m Reset Selection
The energy applied to cause vibration can be in the form of air pressure, a stick,a bow, or electricity. A. False B. True
What do.scientists know about the future of the universe? what dark matter is made of why the expansion of the universe is accelerating that stars will eventually burn out causing the universe to become cold and dark that galaxies spin much slower than they should based on visible matter
10. Which of these illustrates how air resistance can change an object's falling speed? A. An astronaut floating in space B. A coin dropped from a building C. A parachute slowing a skydiver D. A boulder rolling off a cliff
What is the center of an atom called? electron cloud proton center photon center nucleus
The first energy shell contains a maximum of __ electrons. Select one: a. 1 b. 2 C. 4 d. 8
4x The statement can be made that atoms and molecules are always in motion. Formulate a reason that solids can exist. A The internal energy of the atoms is not enough to allow the atoms to disassociate from its neighbors. B External energy output is strong enough to allow the atoms to withdraw from its nearest neighbors. C Intermolecular forces are inadequate to allow the atoms to break away from its nearest neighbors. D Activation energy is equivalent to allow the atoms to migrate away from its nearest neighbors.
What does a negative velocity indicate? The object is moving backwards The object is speeding up The object is at rest The object is slowing down
What is the speed of sound in air that students need to remember? 550 meters per second 330 meters per second 250 meters per second 1000 meters per second
How does the speed of sound waves change in different mediums? It only changes in water It only changes in air It remains constant It varies depending on the medium
Fire the catapult at the lowest cup position What is the distance achieved? About 635 About 357
If Jerome is swinging on a rope and transferring energy from gravitational potential energy to kinetic energy, what is being done? compression work radiation energy creation
Which word or phrase best describes entropy? disorder order kinetic energy force
What are most semiconductors made from? aluminum copper iron silicon
At which temperature does all molecular motion stop? OR $0^{\circ }C$ OK $0^{\circ }F$
Which statement about the volume and pressure of a gas is the most accurate? Volume of a gas is directly proportional to pressure of that gas in any container. Volume of a gas is inversely proportional to pressure of that gas in any container. Volume of a gas is always greater than pressure of that gas in any container. Volume of a gas is equal to pressure of that gas in any container.
CER: Make a claim about which type of material (dark or light)increases in temperature more when exposed to light energy Use evidence and scientific reasoning from class to support your answer. Your answer
In a transverse wave the wavelength can be measured as the distance between two adjacent compressions. TRUE FALSE
The slope of a linear velocity vs time graph tells us the __ of the object. displacement velocity speed acceleration
What is the first nucleus of an atom shown as? a fuzzy cloud a mass of protons and neutrons a solid mass surrounded by electrons a mass of protons
