what chemical change occurs when a movie reactive substance replaces a less reactive substance in a compound

You toss a coin straight upward in a train which is moving at a constant velocity. If the air friction is negligible, the coin will land (a) In front of you (b) behind you (c) on your hand (d) at either in front of you or behind you

You are wrong. the answer is B. independent

Which 90% of your brain would you like to remove while driving a car? Explain/defend your answer.

13.00 cm + 2.56 mm + 0.0047 = cm? Solve problem with correct number of significant digits

John is traveling north at 20 meters/second and his friend Betty is traveling south at 20 meters/second. If north is the positive direction, what are John and Betty's speeds? A. - 20 meters/second, 20 meters/second B.

An object has an acceleration of 24 m/s/s. How long would it take the stationary object to reach a velocity of 6.8 m/s?

What is normal distribution in statistics?

Which of the following water samples would be considered acidic

A linearly-polarized electromagnetic (EM) wave has an electric field with amplitude 1000 V/m. You hold a a linear polarizer in front of it and rotate the polarizer so that all of the EM wave is blocked. You then rotate the polarizer 30 degree.

Let y'=4 x. find all values of r such that y = rx^{2} satisfies the differential equation. if there is more than one correct answer, enter your answers as a comma separated list.