What is a wavelength of sound wave moving at 340m/s with frequency of 256hz

During a science experiment, your teacher drops a tennis ball out of a window. The ball hits the ground 3 seconds later. (a) What was the ball's speed when it hit the ground? Ignore air resistance.

When work is done by a system and no heat is added, the temperature of the system?

Since all objects are weightless in orbit, how is it possible for an orbiting astronaut to tell if one object has more mass than another?

The half-life for a 100-gram sample of radioactive element X is 5 days. How much of element X remains after 10 days have passed? A. 75 g B. 50 g C. 100 g D. 25 g

Which of the following is not true about a pool of water and a piece of ice? A. They have the same composition. B. They are in different states of matter. C. They have different chemical properties. D. They have different physical properties.

Gerry is looking at salt under a powerful microscope and notice a crystalline structure. what can be known about the salt sample that Gerry is looking at

The kinetic energy of a moving object is equal to the work required to bring it to its speed from rest, or the work the object can do while being brought to rest.

Imagine standing on a bathroom scale and reading your weight. now lift one foot and read your weight again. does the scale read more, less or the same weight when you are standing on one foot?

The period T of a simple pendulum depends on the length L of the pendulum and the acceleration of gravity g (dimensions L/T^2). (a) Find a simple combination of L and g that has the dimensions of time.

What is an example of the theory that the best adapted organisms for an environment are the ones most likely to survive