While teaching about transistors, mrs.. kwon shows a video of a hand pump being used to draw water from a well. she points out how the person primes the pump by pouring a smal amount of water into it before the water would start to flow. what does the water used to prime the pump represent? a. the current in the emitter that amplifies the signal b. the current in the base that amplifies the signal c. the current in the collector that turns the transistors on d. the current in the base that turns the transistors on

When a 5.0kg cart undergoes a 2.2m/s increase in speed, what is the impulse of the cart

Imagine you work as a consultant, and your daily job involves listening to the constructive criticism of others. as part of your job, you must listen to opposing viewpoints to make important decisions. in this activity, you are a consulting dam engineer. you must make a decision about four different dams; should they be repaired, taken down, or left alone? you will listen to contrasting opinions about what should be done with the dams before you make the final decision. as the consulting dam engineer, what do you decide to do with this dam? explain your reasoning. by making your decision, did you support the opinions of the mayor and/or the dam safety official? why or why not? (site 1)

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