Mary is trying to determine the charge of an object in the lab. She observes that it is repelled by a positively charged rod. What can you say about the charge of the object?

If a taxi moves with an initial velocity of + 12.6 meters/second and has a constant acceleration of + 3.1 meters/second2, what is its final velocity after 6.0 seconds?

Which BMI standard for teens is considered under weight? less than 5th percentile 85th percentile to less than the 95th percentile more than the 95th percentile

Water at 20C is flowing along a 5-m-long flat plate with a velocity of 50 m/s. Is the boundary-layer flow at this location laminar or turbulent? What will be the boundary layer thickness at a position 5 m from the leading edge?

Two loops of wire are arranged so that a changing current in one, the primary, will induce a current in the other, the secondary. The secondary loop has twice as many turns as the primary loop. As long as the current in the primary is steady at 3.

A car travels at a constant velocity of 70 mph for one hour. At the second hour, the car's velocity was 60 mph. At the third hour, the car's velocity was 80 mph.

Why should scientists write reports and give oral presentations of the steps and results of their in investigations?

Which of these rocks are formed by volcanic activity? select the two correct answers. a. marble b. basalt c. limestone d. granite e. sandstone

Which source is most likely an authority on the subject? Dr. Vale, a pediatrician, discusses electrical circuitry on her home-improvement website. Jonah, an amateur cook, teaches his son how to make the best grilled cheese sandwiches.

What methods can be used to break down substances into elements

8. A gas is contained in a horizontal piston-cylinder apparatus at a pressure of 350 kPa and a volume of 0.02 m3. Determine the work done by the piston on the gas if the cylinder volume is increased to 0.15 m3 through heating.