Answer:
3rd and 4rth
Explanation:
a geologist studies the earth and both of these have something to do with the earth
Answer:
A mock-up
Explanation:
It is made of cheap and easy to access parts.
Answer:
B
Explanation:
A robot's work envelope is its range of movement. It is the shape created when a manipulator reaches forward, backward, up and down. These distances are determined by the length of a robot's arm and the design of its axes. ... A robot can only perform within the confines of this work envelope.
Answer:
The particles in a liquid have small spaces between them, but not as small as solids. The particles in a liquid are loosely arranged which means they do not have a fixed shape like solids, but they rather take the shape of the container they are in.
Answer:
The true statements are statements 1 and 4.
Explanation:
1. Heavier atoms possess greater entropy at a given temperature than lighter atoms- True.
Concerning atomic substances, heavier atoms possess greater entropy at a given temperature than lighter atoms, which is a result of the relation between a particle's mass and the spacing of quantized translational energy levels.
2. The weight of an atom has no effect on entropy - False.
The entropy of a substance increases with its molecular weight, complexity, and with temperature.
3. Molecules with greater numbers of atoms are associated with lower entropy - False.
Any chemical reaction that increases the number of molecules also increases entropy as a chemical reaction that increases the number of molecules would be a reaction that pours energy into a system.
4. The entropy of a substance is influenced by the structure of the particles that comprise the substance - True.
The structure of the particles (atoms or molecules) in a substance influences its entropy.
For molecules, greater numbers of atoms (regardless of their masses) increase how the molecules can vibrate and thus the number of possible microstates and the system entropy.
