If a car is left on a hill without a hand break why will it roll down the hill?

The combining of light nuclei is called blank. blank as in not actually blank. you know what im tryin to say.

Will mark as brainliest how does a catapult increase the trajectory of an object? ps. answer as if u were a 5th grader

Scientists follow specific processes in order to determine valid explanations and conclusions from observations. david observed strange lights in the sky above his home outside of roswell, new mexico. the only explanation that makes sense to him is that there are ufos in the area. what should david do next to verify his explanation?