Cho mạch điện như hình 10.1 Biết hiệu điện thế Uab = 12 V R2 = 3 ôm bỏ qua mạch điện trở của dây nối ampe kế vôn kế a tính điện trở của biến trở khi biết chỉ số của ampe kế là 2 a b giữ Uab = 12 V Nếu vôn kế chỉ = 4,5 V thì điện trở của biến trở là bao nhiêu

We have a colorless transparent liquid. it looks like water. we seperated it into a solid and a liquid by evaporration and condention was this a chemichal or a physical seperation a. chemical seperation b. physical seperation

Imagine you are standing in the antarctic during the southern hemisphere summer. the sky is clear and blue. there are no clouds in the sky. your shadow is cast on the icy ground. what is the color of the shadow?

Steelhead trout migrate up stream to spawn.occasionally they need to leap up small waterfalls to continue their journey. fortunately, steelhead are remarkable jumpers, capable of leaving the water at a speed of 8.0 m/s. a. what is the maximum height a steelhead trout can jump? b.leaving the water at 8.0 m/s, the trout lands on top of the water fall 1.8 m high. how long was it in the air?