Density = mass ÷ volume
D= 44g ÷ 8 cm^3
D = 5,5 (round it) 6 g/cm^3
Sodium (Na) is very reactive because it does not have a full valence shell.
Answer:
Explanation:
There are two hypotheses she could test:
A cat's heart rate changes while it is napping.
A cat's heart rate does not change while it is napping.
Answer:
0.686 g of ice melts each second.
Solution:
As per the question:
Cross-sectional Area of the Copper Rod, A = 
Length of the rod, L = 19.6 cm = 0.196 m
Thermal conductivity of Copper, K = 
Conduction of heat from the rod per second is given by:

where
= temperature difference between the two ends of the rod.
Thus

Now,
To calculate the mass, M of the ice melted per sec:

where
= Latent heat of fusion of water = 333 kJ/kg

Answer:
all forms of electromagnetic radiation travel at a single speed in a vacuum.
Explanation: