A block of wood is kept on a table top . The massof a wooden block is 5 kg and its dimensions are 40*20*10 find the pressure exerted by the wooden block on the table top if it is made to lie on the table top with its sides of dimensions 20*10(Take g=10m/s²)
Answers
Answer:
Mass of the wooden block, m=5kg
Thrust due to wooden block,
Mg=5kg×9.8ms
−2
=49N
(a) Surface area of 20cm×10cm surface,
A=(20×10)cm
2
=(0.2×0.1)m
2
=0.02m
2
P=
A
mg
P=
0.02m
2
49N
=
0.02
49
Nm
−2
or Pressure, P=2450Nm
−2
.
(b) Surface area of 40cm×20cm surface,
A=(40×20)cm
2
=(0.4×0.2)m
2
=0.08m
2
P=
0.08m
2
49N
=
0.08
49
Nm
−2
or Pressure, P=612.5Nm
−2
.
Explanation:
17. A gas company extracting natural gases reduces the air temperature to --182.96°C to get oxygen in liquid form
They have to make the temperature-196.0°C to extract nitrogen. What is the drop in temperature to reach the
level of extracting nitrogen
17. A gas company extracting natural gases reduces the air temperature to --182.96°C to get oxygen in liquid form
They have to make the temperature-196.0°C to extract nitrogen. What is the drop in temperature to reach the
level of extracting nitrogen