23. A board for a shelf is 2.31 m long and 33.4 cm wide. to. What is the area of ​​the shelf in square meters? b. What is the perimeter of the shelf in centimeters? c. Which will reduce the area of ​​the shelf more: (1) cutting 3.4 cm from its width, or (2) cutting 0.31 m from its length?

When applying kirchhoff's rules, one of the essential steps is to mark each resistor with plus and minus signs to label how the electric potential changes from one end of the resistor to the other. the circuit in the drawing contains four resistors, each marked with the associated plus and minus signs. however, one resistor is marked incorrectly. which one is it?

Arock collection comes from which part of earth?

Imagine that someone pushes one marble toward a motionless marble. would there still be action-reaction forces involved in the collision? how might the marbles’ motions be changed? ?