3 A student is investigating the pressure that a block of wood is exerting on the floor. The weight of the wood is 20 N. The block is 10 cm long, 5 cm wide and 2 cm high.
a What is the biggest pressure that the block can exert on the floor?

Pressure = Force/Area

Explanation:

Area of block = 5cm x 10cm = 50cm = 0.5m

F= 20N

therefore P = F/A

=20N/0.5m

=40 N/m

answer: the correct answer id option(d).

explanation:

snell's law refraction:

the angle of refraction =

the angle of incidence =

refractive index of air = = 1

refractive index of glycerol = 1.47

from the given options, the most closest answer to 63.72° is 65° of option (d).

answer; equivalent to a one(1) horsepower motor;