3. A steel circular rod with a radius of 15 cm is placed between two vertical supports at 15 degrees Celsius. What compressive force is exerted by the vertical supports if the temperature increases to 60 degrees Celsius? (The coefficient of linear expansion for steel is 12 x 100 °C1 and the elastic modulus of steel is 200 x 10 N/m?).

How many kw-hr of energy does a 40 Watt light bulb use in one hour?   B) FPL charges 10.8 cents per kw-hr of energy usage. How much did you spend running your 40 Watt light bulb for one hour?

A child walking in a field makes three consecutive displacements. The child first moves 6.25 m westward, then 12.9 m northward. Finally, the child moves back to the starting point of the first displacement. What is the magnitude and direction of the child's third displacement? Give the magnitude in m and the direction as an angle south of east. magnitude 14.33 v m direction 115.18 Use trigonometric functions, along with the components of the vector sum, to find the angle. Check the direction against your diagram.° south of east Additional Matoriale

(True or False) The slope of a graph has units of vertical units divided by horizontal units(vertical units)/(horizontal units).

A silver sphere with a radius of 5.8 cm weighs the same as a certain aluminum cube. How long are the sides of this cube (in cm)?

Modern PhysicsDerive the equation above to form the answer highlighted. Show the solution. Derive the equation ∆t = 2/cv √(∆tnot/2)² + (V∆t/2)² and it should come up with that highlighted answer below. So it means that you need to show the process of the solution on how that equation comes up with that highlighted answer.

A person walks 30.0 north of east for 3.80km. How far due north and how far due east would she have to walk to arrive at the same location?

When a branch contains a current source, the number of mesh equations is reduced, thus simplifying the mesh analysis technique True or false

What is the resultant vector of the following vectors? Write your answer as xy. Leave na spaces. Right and Up are positive.

Calculate the approximate number of board feet (one board foot is defined as a volume of 1 in x 1 ft x 1 ft) of lumber that would be available in a log that has a diameter of 26 cm and a length of 2.4 m. Assume the log is a right cylinder and that the saw mill must make the log into a rectangular prism before cutting it into boards.