Physics
Why big nuts always rise to the top
X-rays scans of a box of mixed nuts now reveal why large Brazil nuts rise to the top.
MS-PS2-2
Plan an investigation to provide evidence that the change in an object's motion depends on the sum of the forces on the object and the mass of the object.
More Stories in MS-PS2-2
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PhysicsButterflies use jet propulsion for quick getaways
If you have ever tried to catch a resting butterfly, you know they are surprisingly difficult to nab. A new study helps explain why.
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PhysicsResearchers reveal the secret to the perfect football throw
The tip of a spiraling football follows the ball’s path. If you know a thing or two about gyroscopes, this is not what you’d expect.
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PhysicsHow physics lets a toy boat float upside down
Buoyancy’s upward force keeps objects afloat even in unusual conditions.
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PhysicsFlying snakes wriggle their way through the air
Flying snakes go tens of meters (yards) without wings. They do it by undulating back and forth and up and down, a new study shows.
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Materials ScienceSelf-powered surface may evaluate table-tennis play
Scientists at the Georgia Institute of Technology built a 'smart' surface on which to play table tennis. It can track the location, speed and direction of the ball.
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TechTeens garner some $4 million in prizes at 2017 Intel ISEF
Hundreds of teens collectively took home about $4 million in awards from the Intel International Science and Engineering Fair this week.
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PhysicsWhy your shoelaces untie themselves
High-speed video shows how the combined motions of a shoe’s swinging and landing on the ground provoke shoelaces to come untied.
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PlanetsHow Earth got its moon
How did our moon form? Scientists are still debating the answer. It may be the result of some one big impact with Earth — or perhaps many small ones.
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PhysicsFalling through Earth might be a long and fruitless trip
A classic physics problem asks what would happen if you plunged through Earth’s center. A new study contends you could never make it to the other side.