Một chiếc thuyền có tốc độ 15 km / h trong nước tĩnh lặng đi 30 km về phía hạ lưu và trở lại trong tổng cộng 4 giờ 30 phút. Tốc độ dòng chảy (theo km / h) là:

What type of wave carry sound energy forward?

A camel travels 500 meters in five minuets what is its speed

Two teams of nine members each engage in a tug of war. Each of the first team's members has an average mass of 68 kg and exerts an average force of 1350 N horizontally.

John pushes hector on a plastic toboggan. What is the net force acting on hector and the toboggan

When a potential difference of 150 V is applied to the plates of parallel-plate capacitor, the plates carry a surface charge density of 30 nc/cm^2. The spacing between the plates (in μm) is: a) 2.2 b) 1.1 c) 4.4 d) 6.6

A crude approximation for the x component of velocity in an incompressible laminar boundary layer is a linear variation from u = 0 at the surface (y = 0) to the freestream velocity, U, at the boundary-layer edge (y = δ).

Why did dad leave mom?

Sal drew the electron dot diagram of an aluminum atom as shown. How should Sal correct his diagram? He should add five more dots so that the atom obeys the octet rule. He should add ten more dots so that all thirteen electrons are shown.

What uses electricity

How do the elements in the Noble Gas family compare?