In which medium is the speed of a sound wave the greatest?

A) air in your classroom

B) iron railroad track

C) pool of water

D) vacuum in space

A mother and daughter are on a seesaw in the park. How far from the center must the 124 lb mother sit in order to balance the 46 lb daughter sitting 8 ft from the center. Answer in ft 1. 4.31 2. 2.35 3. 3.08 4. 3.47 5. 3.36 6. 3.94 7. 1.99 8. 3.

Why might compound gear trains be better than two gears alone?

What happened to an iron bar if it is heated from 32 degree Celsius to 64 degree Celsius

Migratory birds are able to use the earth's magnetic field to navigate even when clouds and darkness prevent them from having visual references for their flight.

125 g of dry ice (solid CO2) is dropped into a beaker containing 500 g of 66°C water. The dry ice converts directly to gas, leaving the solution. When the dry ice is gone, the final temperature of the water is 29°C.

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

An astronaut on the planet Trappist-1b tosses a rock horizontally with a speed of 7.95m/s. The rock falls through a vertical distance of 2.35m and lands horizontal distance of 9.57m from the astronaut.

Whicg of the following is not a force that would act on a bicycle as it moves down a street gravity air resistance fluid friction sliding friction

A student holds a magnet 1 m from a paper clip and sees no evidence of a force acting between the two. When the student brings the magnet 1 cm away from the paper clip, the paper clip begins to slide toward the magnet.

According to Newton's 3rd Law, an object's momentum depends on it's velocity and mass. 4 dog-sled teams competed to see who could gain the greatest momentum.