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

Mechanical energy is the difference between the kinetic and potential energies of an object. True or False?

When tuning a guitar, a musician plays two strings at once. These sound waves overlap and often appear to get louder and softer if the strings are not in tune.

You move a 35 N object 5 meters. Find the work you did.

In a homogeneous mixture, the ingredient substances are?

Two plates separated by a distance d = 14.8 mm are charged to a potential difference V = 7.25 V. A constant force F = 7.81 N pushes a - 8.30 mC charge from the positively charged plate to the negatively charged plate.

Why is copper a good conductor?

Sketch of the distance vs time graph for a car with constant velocity

3. Applying Concepts Explain why a canoe that has hollow, water- tight compartments on its ends won't sink, even if it is capsized.

If two forces of equal magnitude act on an object that is hinged at a pivot, the force acting farther from the pivot must produce the greater torque about the pivot. A) true B) false C) unable to decide without knowing the shape of the object

Standard voltage for electrical circuits in the United States is 120 volts. Is this the standard voltage in other countries?