What is gravitational force? A. The force that repels objects. B. The force that makes objects transparent. C. The force that attracts objects towards each other. D. The force that makes objects glow. 相关知识点: 试题来源: 解析 C。解析:文章明确指出重力是吸引物体相互靠近的力。A 选项排斥...
We have all experienced the force of gravity. It is what happens to you when you jump up into the air. Disappointingly, we tend to fall right back down to the ground. But what if we could switch gravity off? What will happen if the gravity vanishes? Buckey, an astronomer, says that...
百度试题 题目On the surface of the moon, the gravitational force(重力) on a body is only 1/6 what it is here on earth.相关知识点: 试题来源: 解析 在月球的表面,对物体的引力仅为地球这儿(引力)的六分之一。反馈 收藏
A. Gravitational force. B. Buoyant force. C. Magnetic force. D. Frictional force. 相关知识点: 试题来源: 解析 B。解析:文章中提到“When an object is placed in water, it experiences an upward force called buoyant force. If the buoyant force is greater than the weight of the object, the...
thatseemsooutrageousthatyoucanhardlybelievethemuntilsomethingsimilarhappenstoyou. Ormaybethedifferenceisyou? Maybeyouhavechangedsincelasttimeyouwerethere? And that?sthethingwithtravelling—itchangesyou.Whenyoutravelyouareforcedtoexperiencea newculture.Whetherit?seatingguineapig,orstayingwithafamilywhereneitherofyo...
Due to this gravitational force, the earth pulls any object towards its surface. Therefore, the direction of the weight of the object is towards the earth's center. Weight is a vector quantity.The weight of an object varies from place to place:...
G is the universal gravitational constant. m1is the first body's mass. m2is the second body's mass. r is the distance between the two bodies. Therefore, the gravitational force seems to be the universal attractive force that exists across all stuff....
To help visualize what is meant by a gravitational field we may use lines of force.下划线部分在句中做 ___。 A. 主语 B. 宾语 C. 状语 D. 定语 相关知识点: 试题来源: 解析 C 解析:“it”为动词“make”的宾语,“easier”为宾语补足语,“for us to take derivatives”为不定式复杂结构,作真正...
Step-by-Step Solution:1. Understanding Gravitational Potential Energy: - Gravitational potential energy (U) is given by the formula: \( U = mgh \) where \( m \) is the mass of the apple
It might be Cavendish's experiment of 1798, which measured the gravitational force between masses by suspending them from a torsional pendulum. Or James Joule's demonstration of the conversion of mechanical energy to heat. Or perhaps some recent experiment in quantum information or computational ...