Juan is comparing the brightness of two lightbulbs. Which SI unit should he use?

a. Kelvin

b. candela

c. mole

d. meter a or b

What does a positive (+) acceleration tell you about an object's motion?

Why does Mercury's surface temperature vary so much from day to night

What is the shape of Earth's magnetic field most similar to? A. A disk magnet B. A bar magnet C. A horseshoe magnet Which one?

Kinetic energy into electrical energy

Doubling which quantity would cause the largest increase in a spring's elastic potential energy?

There are four springs stretched by the same mass. Spring A: 25 cm Spring B: 10 cm Spring C: 100 cm Spring D: 1 cm Which spring is the strongest? A B C D

Consider a rough asphalt roadway with 17 cm curbs and one 3.75 m lane in each direction and a 1.45 m shoulder on each side. The road has a longitudinal slope of 0.75% and is crowned in the center with a transverse slope of 2.25%.

An example of an opinion would be which of the following? bob s burgers is the best show on television. cake is appropriate for many occasions. earth is 238,900 miles from the moon. none of these

Which is a concern about mining for uranium? -Heated water could be released into the environment. -Dust released in the air could be radioactive. -Supplies could become low during a drought.

In 1986, a gargantuan iceberg broke away from the Ross Ice Shelf in Antarctica. It was approximately a rectangle 160 km long, 40.0 km wide, and 250 m thick. What is the mass of this iceberg, given that the density of ice is 917 kg/m3?