Answer:
Lead metal has a greater magnitude of temperature change.
Explanation:
let the mass of copper and lead be m.
Energy loosed by Copper metal = -Q = -100 J
(Negative sign just indicates that energy is released)
Change in temperature warm of the copper =
Specific heat capacity of copper = c = 0.093 KCal/Kg°C = 389.112 J/kg°C
1 kCal = 4184 Joules
Energy gained by lead metal = Q' = 100 J
Change in temperature lead=
Specific heat capacity of lead = c' = 0.031 KCal/Kg°C = 129.704 J/kg°C
On comparing temperature changes in both metals:
Lead metal has a greater magnitude of temperature change.
Answer: B, increase the rate at which he turns the crank
Explanation: i got it right
Answer:
12m/s
Explanation:
Using the equation of motion
v = u + at
Given that
u = 0m/s
a = 2m/s²
time t = 6s
Substitute the given values into the expression
v = 0 + 2(6)
v = 0+12
v = 12m/s
Hence the required velocity is 12m/s
The thing should be at a space less than the focal length
from the convex or also known as converging lens in a way to develop a virtual
image. The image made would be standing, virtual and enlarged, just like how a
magnifying glass does. The virtual image is shaped on the same side of the lens
as the object.