What is the purpose of the zig zag line on the periodic table

Which characteristic should a good scientific question have? A) It should lead to a hypothesis that is not testable. B) it should have a very broad focus with many variables. C) it should repeat a question that the researcher has had before.

Which mechanical waves needs a medium to travel through?

You want to pull a 10 kg block up a frictionless ramp with an acceleration of 2.5 m/s2. What force do you need to apply along on the block along the direction of the ramp's surface if the ramp is angled at 30 degrees above the horizontal?

Another element is silvery-white with a shiny luster, is very brittle, and forms ions with a - 2 charge. give one possible identity of this element. enter the symbol for the element.

Is a artwork book considered science book

During a collision, a bus runs into a skateboarder inelastically. If the mass of the skateboarders is 70 kg and is moving at 12 m/s to the right, what is the final velocity of the skateboarder if the 2000 kg bus is traveling at 25 m/s to the left

What are hypotheses suggesting why urban children have more food allergies than children from rural areas? Select the TWO answers that are correct.

Which is a correct statement of what occurs at a turbine during electricity production?

2. Which graph shows a possible voltage profile over time for a 12 V lantern battery as it provides power to a bank of electric lights?

How would you describe the interaction between opposite (N-S or S-N) magnetic pols?