SNIR, J. Sink or float - What do experts think?: The historical development of explanations for floatation. Science Education, v. 75, n. 5, p. 595-609, 1991.Snir, J. ( 1991 ). Sink or float—What do the experts
A. sink in the water B. move up and down in the water C. stay on the surface of the water D. swim quickly in the water 相关知识点: 试题来源: 解析 C。“float in the water”意思是漂浮在水中,也就是停留在水面上,即“stay on the surface of the water”。A 选项是沉入水中,B 选项是...
Would this object float or sink in water? Explain Initially 10.0 mL of water was placed in a graduated cylinder, and then a solid metal was immersed in the water in the graduated cylinder. At this point, the volume of water was read as 15.5 mL. If the mass of the solid is 9.25 g,...
Magnitude is the measure of an object's brightness in the night sky. Bright objects have low magnitudes. Because the planets reflect the sun's light, their magnitude will vary. Saturn has a maximum magnitude around -0.3. When this is the case, it is still fainter than Sirius, the brightes...
A piece of wood and a Styrofoam cup float in water. On the other hand, a ceramic cup and a rock sink in water because they are more dense than water. This has nothing to do with an object's mass. For example, a piece of cork weighing 10 g grams floats on water, while a much ...
A. Float above the ground. B. Sink into the ground. C. Fly like a bird. D. Swim like a fish. 相关知识点: 试题来源: 解析 A。解析:“There may be magnetic levitation bicycles. They can float above the ground.”,磁悬浮自行车能悬浮在地面之上。反馈 收藏 ...
Explain why an object in water always appears to be at a depth shallower than it actually is. Why will a sinking ship often turn over as it becomes immersed in water? Hydroelectricity is generated by storing water behind a dam, and then letting some of it run through generators in the da...
The simplicity of the diving bell actually makes it believable that Alexander the Great may have used an early version, as legend suggests. Next time you're in the kitchen get a cup, fill up your sink and push the open end of the cup straight down into the water. You'll feel some re...
and shovel that will come in handy during the adventure quests. A knife and pistol will also be essential for the combat tasks, but ammo is limited so you’ll need to find some on an island or reload from your ship. Likewise, you’ll use bananas to replenish health, and you can only...
An object has a mass of 3.15-oz when it is submerged in a graduated cylinder initially containing 325.2mL of water, the water raises to 442.5mL. What is the density of the object? Will it sink of float? What is the mass, in kilograms, of the air in a room that meas...