Particles in solids are always vibrating (moving back and forth) in place. The vibrational motion of particles in solids is kinetic energy. Heat makes the particles in a solid vibrate faster, giving them more kinetic energy. ... When a sample of solid, liquid, or gas matter heats up, it expands.
Answer:
75.2 degree Fahrenheit was the predicted high temperature.
Explanation:
Predicted high temperature in the Spain = T' = 24°C
In Spain temperatures are measured in Celsius. But we have to calculate the temperature in Fahrenheit .
To convert this temperature into Fahrenheit, we use the conversion factor:
75.2 degree Fahrenheit was the predicted high temperature.
D. Both particles and high energy radiation
Answer:
- It only allows certain materials to leave the cell.
- It only allows certain materials to enter the cell.
- It helps the cell get rid of waste.
Explanation:
The cell membrane is a flexible membrane made up of proteins and lipids. It is selectively permeable (allowing only certain materials to enter or leave the cell) and plays a great role in selective absorption of materials (such as food nutrients, antibodies, waste products) entering or leaving the cell.
Also, it helps to protect the cell.
Answer: C.
whether it can be separated into simpler substances through physical separation techniques
Explanation:
A heterogeneous mixture is colloidal if
- Particles cannot be seen with a naked eye.
- Particles can pass through filter paper
- It doesn't undergo sedimentation.
A heterogeneous mixture is suspension if
- Particles can be seen with a naked eye.
- Particles cannot pass through filter paper
- It undergoes sedimentation.
So, the criteria are responsible for deciding whether a heterogeneous mixture is a colloid or a suspension is "whether it can be separated into simpler substances through physical separation techniques".
So, the correct answer is "c".