What is the wavelength of an ekectromagnetic wave that has a frequency of 40,000 hz? the speed of light is 3x10^8 m/s?

The superposition of mechanical waves can be observed in the movement of

If you close your eyes and feel as if you are not moving, you may be experiencing

Predict whether an element with a valence of 8 is most likely to form ionic bonds covalent bonds or no chemical bonds with other Atoms. explain

a soccer player kicks a ball. According to Newton's third law of motion, the player's foot exerts a force on the ball. The ball exerts a force on the foot. Why don't the forces cancel out to result in a net force of zero?

How can you measure mold on food?

8. What happens to force when mass is increased?

Give an example of ionic and covalent bond, and explain and make an example for each.

Which of these is the best reason for proper nutrition? A. To ensure that you will be skinny B. To protect yourself against certain diseases C. To improve your intelligence D. To ensure that you will get good grades

And object has a mass of 15g it has a volume of 7.5ml. find the density of the object.

I need this answered quickly. is the branch of science for naming and classifying organisms based on their natural relationships? A-physics B-taxonomy C-genetics D-biology