Answer:
43.3J
Explanation:
Given parameters:
Force = 10N
Distance = 5m
Angle = 30°
Unknown:
Work done = ?
Solution:
Work done is the force applied to move a body through a particular distance;
Work done = Force x distance cos Ф
Now insert the parameters and solve;
Work done = 10 x 5 cos 30 = 43.3J
The energy required to heat a substance is related by the formula:
Q = mCpΔT ; where Q is the energy, m is the mass of the substance, Cp is the specific heat capacity and ΔT is the change in temperature.
2000 = (4)(Cp)(5)
Cp = 100 Joules / g °C
Answer:
0.34148 m
Explanation:
= Resistivity of tungsten = 
d = Diameter = 0.0018 inch
r = Radius = 

= Temperature coefficient of tungsten = 
Power is given by

We have the equation
![R_2=R_1[1+\alpha(T_2-T_1)]\\\Rightarrow R_1=\dfrac{R_2}{1+\alpha(T_2-T_1)}\\\Rightarrow R_1=\dfrac{144}{1+0.0045(2550-25)}\\\Rightarrow R_1=11.64812\ \Omega](https://tex.z-dn.net/?f=R_2%3DR_1%5B1%2B%5Calpha%28T_2-T_1%29%5D%5C%5C%5CRightarrow%20R_1%3D%5Cdfrac%7BR_2%7D%7B1%2B%5Calpha%28T_2-T_1%29%7D%5C%5C%5CRightarrow%20R_1%3D%5Cdfrac%7B144%7D%7B1%2B0.0045%282550-25%29%7D%5C%5C%5CRightarrow%20R_1%3D11.64812%5C%20%5COmega)
Resistance is given by

The length of the filament is 0.34148 m
Answer:
I think it's<u> D. Getting divorced</u>
Explanation:
Answer:

Explanation:
Work is equal to the product of force and distance.

The force is 8 Newtons and the distance is 15 meters.

Substitute the values into the formula.

Multiply.

- 1 Newton meter is equal to 1 Joule
- Our answer of 120 N*m equals 120 J

The work done is <u>120 Joules</u>