Ultrasound consists of sound at frequencies most people can hear?

Which of the following statements is true about isotopes? Question options: The number of protons always equals the number of neutrons in all isotopes. Different isotopes for the same element always have the same number of protons.

Blue, red, and green light enters a drop of water. Which bends more, and why?

According to kepler's first law, the sun is located at one focus of an eclipse traveled a long by a planet in its orbit. What is at the other focus?

Light includes which of the following? A. Radio waves and microwaves B. Visible light C. X-rays and gamma rays D. All of the above

A 0.13 g plastic bead is charged by the addition of 1.0Ã1010 excess electrons. what electric field eâ (strength) will cause the bead to hang suspended in the air?

Cecelia dropped a ball from a height of 2 m. The ball fell in a straight path down to the ground According to Newton's universal law of gravitation, which would change the path of the ball so it traces out the widest curved path possible?

An object becomes charged when the atoms in the object gain or lose. True or False

A container has 79000cm3 of mercury. Find the mass of mercury if the density is 13.6g/cm3

Explain how the movement of groundwater is related to the water cycle.

Two masses are attracted by a gravitational force of 400 N. What will the force of attraction be if each of these two masses is halved?