A conveyer belt moves a 40 kg box at a velocity of 2 m/s. What is the kinetic energy of the box while it is on the conveyor belt? 40 J 80 J 160 J 1,600 J

Consider two slides, both of the same height. One is long and the other is short. From which slide will the children have a greater final speed when they slide off? Assume that there is no friction acting.

How does the energy of a system change during a phase change?

Which of the following is an abiotic limiting factor for a plant population in an ecosystem? Invasive weed species Seed dispersal by wind Availability of soil minerals Disease-causing fungal spores

Suppose an intelligent society capable of receiving and transmitting radio signals lives on a planet orbiting Procyon, a star 95 light years away from Earth.

Which is given as an explanation for how the paleozoic supercontinent ice cap melted?

Why does the rotation of earth require people to establish times zones?

Which of the following statements best describes the importance of investigations in science

Which element has a complete valence electrons hell?

3. If you are part of a center or network, you can use program-level data to A. change the way you record and maintain information. B. identify professional development needs. C. improve the management systems to support child learning. D.

What did James Madison foresee as an important element of the political system? a. Hyperpluralism b. Social movements c. Interest groups d. Lobbying