A 12-kg sled is moving at a speed of 2.0 m/s. At which of the following speeds will the sled have twice as much kinetic energy? A. 2.8 m/s B. 4.2 m/s C. 6 m/s D. none of the above

How can a protein outside the cell cause events to happen inside the cell?

Which type of star is smaller neutron or dwarf

Two fluorine atoms form a compound with a covalent bond. What is this compound called?

A racing yacht has a mass of 400kg and is travelling at a velocity of 12m/s. A gust of wind increases its velocity to 25m/s. Calculate the change in momentum of the yacht caused by the gust of wind.

The power in an electrical circuit is given by the equation P=i^2R, where I is the current flowing through the circuit and R is the resistance of the circuit.

If the approximate energy of a photon present in an X-ray is 8.0 * 10-15 joules, what's the frequency of the X-ray? Given: Planck's constant is 6.63 * 10-34 joule·seconds. (A) 1.2 * 1014 hertz (B) 1.2 * 1019 hertz (C) 8.2 * 1018 hertz (D) 8.

Why is messi the best soccer player in the world

A data chrt shows the height of a person on his birthday each year for 10 years what is the dependent variable

A baking tray is made of metal because its

A scientist mixes an unknown powder into a beaker of water. He then uses an indicator and finds that the pH of the resulting solution is 8.5. What can he infer from this observation? The unknown powder was acidic.