The model airplane in Figure 5.6 is flying at a speed of 14.6 m/s on a horizontal circle of radius 18.7 m. The mass of the plane is 0.918 kg. The person holding the guideline pulls it in until the radius of the circle becomes 14.3 m. The plane speeds up, and the tension in the guideline becomes four times greater. What is the net work done on the plane?

All the simple machines make work easier to do by changing the or of a force. a. size; type b. work; type c. size; direction d. type; direction

Positrons are spontaneously emitted from the nuclei of

Assume you measured the mass of the cart to be (500 ± 1) g and the mass of the additional mass you put on the cart to be (500 ± 1) g as well. since the scale you are using in the lab cannot measure objects heavier than 600g you will have to sum up individual pieces and propagate the error. so what would be the mass and the standard error of the cart and the mass