A 20 kg dog on ice skates is accelerating at 2 m/s^2. What is the net force on the dog?
Ο
Ο Α. 2N
Ο
Ο Β. 1ON
Oc. 22 Ν
Ο
Ο D. 40

Aphysical change is a change in the size, shape,, or stafe of matter true or false

Waves are used in many practical applications to support work, entertainment, and health. one example is the use of ultrasound imaging to safely track the development of a growing fetus. what is a specific example of a practical application of waves in medicine, entertainment, safety, or other fields? provide a brief explanation of how the properties of waves are useful to that application.

Select for each of the following statements whether it is correct or incorrect. (a) in an isothermal expansion of an ideal gas. (b) the temperature remains constant. (b) the pressure remains constant. (c) there is work done by the gas. (d) there is heat added to the gas. (e) the change in internal energy equals zero.