Answer: A) soft.
Explanation:
Nylon is a big covalent molecule as it formed by polymerization of small units called as monomers. It is a synthetic polymer and is prepared in labs.
Nylon polymers are soft, light in weight, have high melting point, have excellent resistance towards abrasion and are very resistant to heat.
Thus Nylon is used in making backpacks as it is soft.
Answer:
1.315 m
Explanation:
Assumption: there is no resistance of any type
v= 5.08 m/s
g = 9.81m/s^2
change in kinetic energy = change in gravitational potential energy
mass on both side is same so it cancels out
and also making 'h' alone on one side
h= ((5.08)^2)/(2*9.81)
h =1.3153m
Answer:
When the object is placed between centre of curvature and principal focus of a concave mirror the image formed is beyond C as shown in the figure and it is real, inverted and magnified.
Answer:
A) How much work does the Pepsi do on the bullet = 0.0625J
B) At what velocity does the Pepsi hit the floor = 7.67m/s
Explanation:
- Given mass of bullet = 5g
- initial velocity = 500 m/sec
From work done = Force X Distance
Workdone ; m(v - u )/t
A) The work done by the Pepsi is equal to the change in kinetic energy while in the Pepsi:
- but The work done by the container wall on the bullet is equal to the change in kinetic energy on either side of the wall: W = change in kinetic energy = 1/2 mv²
= 1/2 X 0.005 x 500² - 1/2 X 0.055 x 5²
= 624.94J
- Therefore ; The work done by the Pepsi is equal to the change in kinetic energy while in the Pepsi = W = change in KE = 0.0625 - 0 = 0.0625J
B) At what velocity does the Pepsi hit the floor?
- From conservation of energy principle; PE = KE