hai dây dẫn bằng nhôm có cùng tiết diện 1 và y dài 2 m có điện trở r1 và dây kia dài 6 m có điện trở r2 tính tỉ số r1 r2

How are momentum and impulse related? impulse is a whim to do something, while momentum keeps it going impulse is another name fore instantaneous momentum the impulse acting on and object is equal to the change of momentum it causes. the impulse that acts on and object is the momentum that results.

If the chemical properties of a substance remain unchanged and appearance or shape of a substance changes it is called a ?

The radius of a sphere is increasing at a rate of 9 cm/ sec. find the radius of the sphere when the volume and the radius of the sphere are increasing at the same numerical rate.