How often do certifications need to be updated? A. Certifications don't need to be updated. B. Every year C. Every five years D. Every two years

Explain why you poured the ester into water before you identify the smell?

An object moved 45 meters in 9 seconds, what is the speed?

Trolley A has a mass of 2kg and is moving at 2m/s. It collides with trolley B, which has the same mass but is stationary. What is the momentum of the two trolleys after the collision?

If a star's radiation peaks in the ultraviolet region of the spectrum, what could you conclude? It will not be able to be seen It is a black hole It is a very intense star It is not a very intense star

Una caja de 5.0kg de masa se acelera desde el reposo a través del piso mediante una fuerza a una tasa de 2.0 / s2 durante 7.0s encuentre el trabajo realizado sobre la caja

The locations of the major pressure and wind systems on the earth:

Which statements correctly describe the properties of heat? Select all that apply. Heat is an essential component of life on Earth. Heat is energy that flows from one object to another. Heat flows from a hotter object to a colder one.

A book is sitting on a table at rest. Which of the following best describes the forces acting on the book? A.

When NASA's Skylab reentered the Earth's atmosphere on July 11, 1979, it broke into a myriad of pieces. One of the largest fragments was a 1770-kg lead-lined film vault, and it landed with an estimated speed of 120 m/s.?

A spring gains 2.34 joules of elastic potential energy as it is compressed 0.250 meter from its equilibrium position. What is the spring constant of this spring? (1) 9.36 N/m (3) 37.4 N/m (2) 18.7 N/m (4) 74.9 N/m