What is the instantaneous speed of the bird at t=6s

The sun generates both mechanical and electromagnetic waves. which statement about those wave is true?

What type of nuclear decay causes the atomic number of an element to increase by 1?

Which of the following statements are evidence that gases do not always behave ideally? check all that apply.? a. co2 gas becomes dry ice (solid co2) at 1 atm and –78.5 °c. b. when two gases are mixed, they follow dalton\'s law of partial pressures. c. at 4 k and 1 atm, helium is a liquid. d. it is impossible to compress a gas enough so that it takes up no volume.