Time (y) 15
1-
15 During a lab investigation, students added four 50 g masses to two boxes and arranged
the boxes so that they were motionless on a pulley, as shown in the diagram. The
students then followed the procedure described in the box. The students recorded their
observations after each procedure and reset the pulley system to the original conditions.
During which procedures did students observe an unbalanced upward force on Box 1?
1
Choose only one.
Procedures
A. Procedures only
B. Procedures 1, 2, and 3
50 g
mass
1. Push Box 1 downward. Observe. Reset.
2. Add another mass to Box 1. Observe. Reset.
3. Remove one mass from Box 2. Observe. Reset.
4. Add another-mass to Box 2. Observe. Reset.
5. Remove two masses from Box 1. Observe. Reset.
C. Procedures 4 and 5
Box 1
D. Procedures 3 and 4
E. Procedures 1, 3, and 5
Box 2

The bergeron process.

Part 1: which process does arrow f represent? part 2: explain how matter is conserved during the process.part 3: justify why this process is a recycling of carbon in the carbon cycle.  use complete sentences to explain your answer.

Starsstars are giant balls of hot gases that can produce their own light. stars give out energy by converting hydrogen gas into helium in their cores. stars are gigantic in size and have immense gravitational attraction. the sun is a medium sized star that gives us energy and makes life on earth possible.planetsplanets are large (almost) spherical objects that revolve around the sun. planets move in fixed orbits around the sun. there are 8 planets in our solar system. planets may be made of rocks, metals, gases like hydrogen, nitrogen and methane. the earth is also a planet and is the only place in the universe that we know that supports life. planets that revolve around other stars are called exoplanets.satellitessatellites are objects that revolve around planets. they form the essential part of the celestial bodies. these may be of natural origin or sent by humans. the moon is a natural satellite of the earth and revolves around it because it is bound by the earth’s gravitational pull. man also has placed artificial or man-made satellites around the earth and other planets to study them and for communication purposes.i think this is correct not 100%