☆GOOD NIGHT EVERYONE ☆ GUYS ANS THIS ..... QNO.1 WHY DOES A BALL BOUNCE⁉ QNO.2 CAN COWS WALK DOWN STAIRS⁉ QNO.3 the nucleus of an atom consists of ⁉ QNO.4 the number of moles of solute present in 1kg of solvent is called its⁉
Answers
1. The ball bounces because balls are made out of an elastic material like rubber.
2. you can lead a cow up a flight a stairs but you can't lead it back down again. Because of how their knees bend, or so the “fact” goes, cows simply cannot climb down stairs. And that's not exactly true, since a cow's ability to move down stairs really depends on how steep the stairs are.
3. Atoms consist of three basic particles: protons, electrons, and neutrons. The nucleus center of the atom contains the protons positively charged and the neutrons no charge. The outermost regions of the atom are called electron shells and contain the electrons negatively charged.
4. The number of moles of solute present in 1 kg of a solvent is called its. A. molality B. molarity.
(Mark me as brainiest please and thank you)
Ans 1.Strange as it may seem, a ball bounces off the floor because the floor pushes it up! ... The ball gains energy of motion, known as kinetic energy. When the ball hits the floor and stops, that energy has to go somewhere. The energy goes into deforming the ball--from its original round shape to a squashed shape.
Ans 2.While cows won't walk down stairs on their own, it has been proven that cows will walk down stairs if you force them to. So, yes,cows can walk down stairs. They just avoid the situation as much as possible, as they are not evolutionarily prepared for such steep slopes and foreign leg movements.
Ans 3.The nucleus is a collection of particles called protons, which are positively charged, and neutrons, which are electrically neutral. Protons and neutrons are in turn made up of particles called quarks. The chemical element of an atomis determined by the number of protons, or the atomic number, Z, of the nucleus.
Ans 4. The correct answer is Molality.
Molality is a property of a solution and is defined as the number of moles of solute per kilogram of solvent. The SI unit for molality is mol/kg
Mark my brainliest
follow me