A 6 cm long spring extends to 9 cm when a 1 kg load is suspended from it. What would be its length if a 2 kg load were suspended from it?

a. 12 cm

b. 15 cm

c. 18 cm

d. 21 cm

A scientist must only base his or her conclusions on observable evidence from investigation

A bat hits a ball; which has the greater acceleration, the bat or the ball?

What element has 5 valence electrons and is in period 3.

Which of the following is an example of conduction? a: solar energy warming a room b:heat rising from the coils of the stove c: hot air drying a wet towel d: heat moving from a clothes iron to a shirt

A girl with mass of 40 kg sits on a sled at rest with a man of 15 kg. What is the kinetic energy of the girl and sled together

Recall that the previous hint stated that the magic number is 15*x, where x is a number between 1 and 10. Specifically x is an even number between 1 and 10. Try to guess the value of x.

What is the electric potential of a 2.2 µC charge at a distance of 6.3 m from the charge? Recall that Coulomb's constant is k = 8.99 * 109 N • ___ V What is the electric potential at a distance of 99 m from the charge?___ V

A skier is traveling down a slope that is inclined 30° above the horizontal. The coefficient of kinetic friction between the skier and the slope is 0.10. Which of the following best describes the acceleration of the skier? A) It is zero.

What was the idea of the Continent Drift

What happens to an object when an unbalanced force acts on it?