What theory states energy can not be created nor distroyed

If someone lost 20 pounds of fat on a diet, where did the fat go?

A car is traveling to the left, which is the negative direction. The direction of travel remains the same throughout this problem. The car's initial speed is 25.6 m/s, and during a 8.48-second interval, it changes to a final speed of (a) 31.

What is the mass of an object traveling at 20 m/s with a kinetic energy of 4000 J?

A 20 kg mass is dropped from a tall rooftop and accelerates at 9.8 m/s2. What is the weight of the dropped object?

Grace rides her horse with a constant speed of 12kmh. How far can she travel in 90 minutes?

A train moves at constant velocity of 50km/h. how far will it move in 0.5h?

Which process best describes part of a scientific investigation? O designing a solution O evaluating the conclusion O evaluating the solution O identifying the conclusion

How many neutrons are in Cesium-130

You are standing outside during the daytime. How can you see a blade of grass? A. Light is produced by your eyes and travels out to the grass. B. Light is produced by the grass and travels straight to your eyes. C.

Are cosmic rays and gamma rays invisible or do they have color?