Which statement best defines open system.

a) Open systems allows nothing to go in or out of the system.

b) Open systems allows something to go in and out of the system.

c) Open systems cannot give or take at all with another system

While exploring a section of land far from the sea, an explorer discovers a dome-shaped geologic structure with gently sloping sides. Which of the following has the explorer most likely discovered?

Lightning sometimes happens between clouds. suggest a possible way that a discharge can occur between clouds

What is true about radio waves

What do counties get their power from

How do volcanoes above hot spots differ from volcanoes above subduction zones? A. Volcanoes above hot spots have more viscous lava. B. Volcanoes above hot spots tend to be stratovolcanoes. C.

Two copper wires with different diameters are joined end to end. If a current flows in the wire combination, what happens to electrons when they move from the larger-diameter wire into the smaller-diameter wire?

A baseball player is warming up and tosses a ball straight up into the air. The ball travels up until it reaches some maximum height, and then falls back down to the player/'s hand.

Volume can be measured in liters or cubic meters. a. T b. F

A spring with a spring constant of 1200 N/m has a 55-g ball at its end. The energy of the system is 5.5J. What is the amplitude of vibration?

Force F1 acts on a particle and does work W1. Force F2 acts simultaneously on the particle and does work W2. The speed of the particle does not change. Which one of the following must be true? a. W1 is zero, and W2 is positiveb. W1 = - W2c.