How long should you warm up before being physically active?

What will be the frequency of an alternating current if its direction changes after every 0.01 sec

Which of the following can be thought of as either a wave or a particle? a. light b. an electron c. a proton d. all of the above

Horseshoe bats (genus Rhinolophus) emit sounds from their nostrils, then listen to the frequency of the sound reflected from their prey to determine the prey's speed.

Which step of scientific inquiry involves organizing and interpreting the data? It's not A trust me. a. Experimentation b. Analysis c. Conclusion d. Hypothesis

Sally goes on a hike. The distance she walks compared to the amount of time she walks is shown on the graph. Which statement is not true? A. The longer Sally walks, the farther she travels. B. Sally does not walk from the 6th to the 7th hour. C.

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?