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:
500 N
Explanation:
Given that,
The upward force is 800 N and the downward forces are 400 N, 500 N, 400 N.
At equilibrium, the upward forces will become equal to the downward forces. Let the reading in the right hand scale.
x + 800 = 400 + 500 + 400
x + 800 = 1300
x = 1300 - 800
= 500 N
So, the reading in the right hand scale is 500 N.
The new speed of the aircraft is equal to 774.61 mph north of east.
Why?
To calculate the new speed, we first need to know the horizontal component of the wind's speed (moving to the east) since the jet is moving to the east.
We can use the following formulas to solve the problem:
We are given the following information:
So, substituting and calculating we have:
For the vertical speed, we have:
Now, to calculate the airplane speed , we can use the following equation (Pytagorean Theorem):
Hence, we have that the new speed is equal to 774.61 mph north of east.
Have a nice day!
They’re used as lubricants because it eases up on the friction.