The given question is incomplete as the options are not provided. The correct options for this questions are as follows-
(1) Good heat conductivity
(2) Good electrical conductivity
(3) Low melting point
(4) High melting point
Thus, the question now is solved below as:
Answer:
Option (3)
Explanation:
Molecular substances are simply defined as those substances that are comprised of more than two atoms and are interlinked with one another. These atoms are linked with each other by the weaker intermolecular forces. This weak bond reflects the low and high melting point of the substance.
These molecular substances differ from the molecular compounds because, in the case of molecular compounds, the atoms are linked with one another by a strong covalent bond.
Thus, the correct answer is option (3).
M = 4kg
F =8N
a..?
F =m.a
8 = 4.a
a = 2m/s^2
Answer:
1 cm ± 0.05 cm
Explanation:
A ruler is readable to ±0.05 cm. This implies that any measurement taken using the ruler could be uncertain by 0.05 cm above or below the true value.
Hence, ±0.05 cm is called the uncertainty or the precision of the ruler.
We obtained this from the fact that the meter rule is graduated in units of centimetres (cm). This implies that the smallest scale division is 1 mm. Thus, the uncertainty of the meter rule is given by; Δx = smallest increment/2 = 1mm/2 = 0.5mm = 0.05cm.
Answer:
1004.277N
Explanation:
Given that g = 9.817 ms^-2
If the angle between the cable and horizontal is 47°.
The angle between the cable and vertical is 90-47= 43°.
The weight of the beam is mg
The weight of the beam is
= 150*9.817
The weight of the beam is
= 1472.55N
magnitude of the vertical component of the force is mgsin(tita)
= 1472.55*sin43
= 1004.277N