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1. Magnetic Field and electric Field

Homework Statement A charged particle, passing through a certain region of space,has a velocity whose magnitude and directions remain constant. a. If it is known that the external magnetic field is zeroseverywhere in this region, can you conclude that the external electric field is also...
2. Speed of water and height involving fluid mechanics

Can you show me what the entire (energy conservation) equation is before you simplified it? Is it Bernoulli's equation? thanks
3. Absolute pressure with container

Thanks everyone, I managed to solve the problem.
4. Absolute pressure with container

Does this equation work?: P2=p1+(rho)ghmercury+(rho)g(1-h)water
5. Absolute pressure with container

Do I assume that the water is underneath the mercury? or does it not matter?
6. Speed of water and height involving fluid mechanics

Homework Statement In a very large closed tank, the absolute pressure of the air above the water is 6.01x10^5 Pa. The water leaves the bottom of the tank through a nozzle that is directed straight upward. The opening of the nozzle is 4.00m below the surface of the water. a) Find the speed at...
7. Absolute pressure with container

Homework Statement A 1.00m tall container is filled to the brim, partway with mercury and the rest of the way with water. The container is open to the amosphere. What must be the depth of the mercury so that the absolute pressure on the bottom of the container is twice the atmospheric...
8. Crate being pulled at angle, find tension

Hello, I'm new to physics forums, so excuse me ahead of time if something is wrong. Homework Statement A warehouse employee drags a 72 kg wooden crate across the floor at a constant velocity by pulling on a strap attached to the bottom of the box. The crate is tiled 25° above the...