hai dòng điện có cường độ I1=2A, I2=4A. chạy trong hai dây dẫn thẳng dài vô hạn, đồng phẳng , vuông góc với nhau trong không khí . trong mặt phẳng có hai dòng điện , quỹ tích tại đó véc tơ tại đó cảm ứng từ bằng 0 là đường thẳng nào ?

In physics the desire of an object to keep doing what it is doing is termed?

Agroup of monkeys is trying to cross the river in a rowboat. the maximum buoyant force on the rowboat is 2,000 n. the weight of the rowboat is 1,000 n. each monkey has a weight of 150 n. how many monkeys can safely cross in the rowboat at one time? explain your reasoning, including any calculations you used to find the answer.

(a) if the pressure in gas is doubled while its volume is held constant, by what factor do (i) vrms and (ii) change? (b) is it possible to boil water at room temperature (20oc) without heating it? explain.