13. Sound waves can't travel through

A. a solid.

B. a liquid.

C. an elastic material.

D. a vacuum.

Explain why atmospheric pressure decreases with increasing altitude (3marks)

Which of the following parts of an online newspaper is least likely to demonstrate an author's bias? a. movie reviews b. travel blog c. economic predictions in the financial section d. the box scores for yesterday's sporting events

Calculate the oscillation frequency f of the h2 molecule. use meff=m/2 as the "effective mass" of the system, where m in the mass of a hydrogen atom.

Earth's core is composed of two separate layers the inner core and the outer core what is one difference between these two layers? F. One is orphans one is zinc G. One is liquid and one is gas H. One is solid and one is liquid I.

Which of the following describes the relationship between frequency and wavelength? As frequency increases, wavelength increases. As frequency decreases, wavelength decreases. As frequency increases, wavelength decreases.

A nurse applies a horizontal force of 147 N on a bed that has a mass of 152 kg, The magnitude of the normal force acting on the bed is .967 N 5.00 N 1440 N 1490 N

What do scientists use to look at cells, tissues, and small organisms to see how their biological processes differ in space? vibration flybys airlock microgravity

Which of the following is a product of respiration resulting from the breaking of carbon-carbon bonds

A wagon is accelerating down a hill. which statement is true?

What eventually happened to the carbon dioxide in the atmosphere of early earth