How can you make work output of a machine greater than the work input?

On a standing wave on a string, the minimum number of nodes is 1 and antinodes is 2. True or false?

A yellow ball with a mass of 2 kg is rolling across the floor at 3 m/s. A red ball with a mass of 3 kg is rolling across the same floor at 3 m/s. Which ball has greater kinetic energy, and why?

Explain what would most likely happen to cloud formation if the humidity increases. Use complete sentences and give at least two supporting details.

Sarah plans to go on an outing with her friends. On Saturday morning, the sky was cloudy and Sarah's barometer indicated that the air pressure was falling. When air pressure falls, it indicates the weather conditions will decline.

Which phrase best describes wave motion? a. movement of energy through space or a medium b. movement of matter through space c. movement of energy within a partice d. movement of air molecules through a medium

In which medium would light travel the fastest? Question 21 options: a. across a room b. in a swimming pool c. through outer space d. through a railroad track

A 0.60 Kilo gram basketball poses on the rim of a basketball hoop that is 3.0 m high find the potential energy of the ball there (use G=10 N/KG.)

2. What was the role of women as industry increased? A. They gained the vote, B. They became industry leaders, e. They led the household D. They can for government office,

A 26-g steel-jacketed bullet is fired with a velocity of 630 m/s toward a steel plate and ricochets along path CD with a velocity 500 m/s.

A small boat is carrying four people across a river. Without any paddling, the boat moves downstream at a steady speed of 5 m/s. If the average weight of the four people is 60 kg, then what is the speed of the boat after one person gets?