a man standing in front of a mountain sends a sound and hear it's Echo after 2 seconds calculate the distance between the man and the mountain consider the speed of sound is 340 m/s

If an ocean wave has a frequency of 2 waves/s and a speed of 4 m/s, what is its wavelength? Enter the answer

You are asked to write an article for the school newspaper about fad diets. Which of the following paragraphs would be the most factual? A. Fad diets are extreme and do not include balanced meals.

Which of the following is a negative consequence of commercial fishing

Three asteroids have exactly the same amount of mass. The distance from asteroid A to asteroid B is 200 km, the distance from asteroid B to C is 100 km, and the distance from C to A is 250 km.

If a photon has a frequency of 5.20 * 1014 hertz, what is the energy of the photon? Given: Planck's constant is 6.63 * 10-34 joule·seconds.

If an igneous rock has very large crystals of minerals that you can see when looking at it, which type of igneous rock is it

You have a 60-foot roll of fencing and a large field. You want to make two paddocks by continuing the fencing down the middle of a rectangular enclosure. What are the dimensions of the largest such enclosure you can make?

Crystallization is a separation technique used to produce rock candy from a sugar solution. true or false

A car traveling in a straight line has a velocity of 3.79 m/s at some instant. After 5.4 s, its velocity is 11.9 m/s. What is its average acceleration in this time interval? Answer in units of m/s 2

The periodic law states that elements that have similar properties appear ... a. to the left of each other b. to the right of each other c. at every 10th element d. at regular intervals