The current in a river is 1.0 meters/second. Britney swims 300 meters against the current. If she normally swims with a speed of 2.0 meters/second in still water, how long does it take her to complete the trip?

Is mass on a ramp related to acceleration?

What percentage does each parent contribute to a child's genotype?

Andrew lifts a table 7 meters from the ground floor of her house to his attic. If the table weighed 20 kg, what is the gravitational potential energy gained by the table? Estimate g as 9.81. 1300 O 1400 1500 J 1600J 1700

A particle moving along the x-axis has its velocity described by the function vx = 2t2m/s, where tis in s. Its initial position is x0 = 2.3m at t0 = 0 s A) At 2.2s, what is the particle's position? Express your answer with the appropriate units.

What is the minimum time that a warm up should last? A 5 minutes B. 10 minutes C. 15 minutes D. 30 minutes

What does it mean that a form of energy might take more energy to harness than it provides? Are renewable resources always renewable, or can they become non-renewable? Why aren't renewable resources used for everything that we use energy for?

What would a sound wave do if it traveled from a gas to a liquid? •stop •stay the same speed •slow down •speed up

A rock is thrown downward into a well that is 7.92 m deep. Part A If the splash is heard 1.17 seconds later, what was the initial speed of the rock? Take the speed of sound in the air to be 343 m/s.

Which drum would make a sound that fades away faster - one that makes a loud sound or one that makes a more mellow sound Why?

Which of the following is NOT a way to increase the solubility of a solid in water? A. crushing the solid B. shaking the mixture of solid and water C. raising the temperature of the water D. letting the mixture stand still a long time