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.
- Earth
How 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.
- Earth
Falling 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.
- Physics
Why the knuckleball takes such a knucklehead path
They used to say it was how the seams interacted with the air. The new explanation is different. Scientists say its due to a ”drag crisis.”
- Health & Medicine
Why Paralympic sprinters have trouble with curves
Whether an artificial leg is on the right or left side of the body may affect how fast runners can take a turn.
- Physics
Einstein taught us: It’s all ‘relative’
One hundred years ago, a German physicist shared some math he had been working on. In short order, his theory of relativity would revise forever how people viewed the universe.
- Brain
Soccer: Watch out for collisions!
Scientists discover that concussions among high school soccer players stem more from aggressive contact between players than from heading the ball.
- Physics
News Brief: As timely as it gets
A newly modified atomic clock won’t lose or gain a second for 15 billion years. This timepiece is about three times more precise than an earlier version.
- Tech
Make your own mini hovercraft
Hovercraft aren’t just the cars of the future. You can make your own with just a few household items.
- Physics
Raindrops break the speed limit
Raindrops shouldn't be able fall faster than what is known as their terminal velocity. But no one told the rain. Researchers have found droplets breaking that speed limit.
- Tech
New plane wheels land teen at big research competition
Landing a plane in high winds can be a risky business. Intel ISEF finalist Emerson Burkard designed a new swiveling plane wheel to make the process safer.
- Physics
Explainer: How lasers make ‘optical molasses’
Light can bump an atom. Bump it from several different directions at once and even a fast-moving atom will instantly freeze its motion — and chill it to a temperature of nearly absolute zero.
- Physics
Building a mirror with light
Scientists proved that lasers can be used to harness materials into a reflective surface. Some scientists ask: Can a space mirror be far away?
