macroscopic means to be seen with the naked eye and microscopic means to be visible only with a microscope.
Answer:
If a substance can be dissolved it is called soluble.
if a substance cannot be dissolved it is called insoluble
Independent variable- Sally's hair
Dependent variable- The shininess of Sally's hair
Control- The Shampoo
Answer:
Q = 797.5 cal
Explanation:
Given that,
Mass of iron, m = 50 g
The temperature rises from 55°C to 200°C.
We need to find the heat needed to raise the temperature. The heat raised is given by :

Put all the values,

So, 797.5 calories of heat is needed.
The answer is option D.Star X may be moving but its motion is not radial.