A 5-cm-diameter horizontal jet of water with a velocity of 40 m/s relative to the ground strikes a flat plate that is moving in the same direction as the jet at a velocity of 10 m/s. The water splatters in all directions in the plane of the plate. How much force does the water stream exert on the plate?

Firefighters are holding a nozzle at the end of a hose while trying to extinguish a fire. If the nozzle exit diameter is 8 cm and the water flow rate is $12 m^3/min$, determine (a) the average water exit velocity and (b) the horizontal resistance force required of the firefighters to hold the nozzle.

A horizontal water jet from a nozzle of constant exit cross section impinges normally on a stationary vertical flat plate. A certain force F is required to hold the plate against the water stream. If the water velocity is doubled, will the necessary holding force also be doubled? Explain.

Firefighters are holding a nozzle at the end of a hose while trying to extinguish a fire. If the nozzle exit diameter is 8 cm and the water flow rate is $12 m^3/min,$ determine (a) the average water exit velocity and (b) the horizontal resistance force required of the firefighters to hold the nozzle.

A 6-cm-diameter horizontal water jet having a velocity of 25 m/s strikes a vertical stationary flat plate. The water splatters in all directions in the plane of the plate. How much force is required to hold the plate against the water, stream?

A horizontal 5-cm-diameter water jet with a velocity of 18 m/s impinges normally upon a vertical plate of mass 1000 kg. The plate rides on a nearly frictionless track and is initially stationary. When the jet strikes the plate, the plate begins to move in the direction of the jet. The water always splatters in the plane of the retreating plate. Determine (a) the acceleration of the plate when the jet first strikes it (time = 0), (b) the time it takes for the plate to reach a velocity of 9 m/s, and (c) the plate velocity 20 s after the jet first strikes the plate. For simplicity, assume the velocity of the jet is increased as the cart moves such that the impulse force exerted by the water jet on the plate remains constant.

A 6-cm-diameter horizontal water jet having a velocity of 25 m/s strikes a vertical stationary flat plate. The water splatters in all directions in the plane of the plate. How much force is required to hold the plate against the water stream?

Underline the main clause in given sentence. Then circle the subordinate clause.
If the door is open, you can go right into the house.

A horizontal 4-cm-diameter water jet with a velocity of $18 \mathrm{~m} / \mathrm{s}$ impinges normally upon a vertical plate of mass $750 \mathrm{~kg}$. The plate rides on a nearly frictionless track and is initially stationary. When the jet strikes the plate, the plate begins to move in the direction of the jet. The water always splatters in the plane of the retreating plate. Find $(a)$ the acceleration of the plate when the jet first strikes it (time $=0$ ), $(b)$ the time it takes for the plate to reach a velocity of $9 \mathrm{~m} / \mathrm{s}$, and $($ c ) the plate velocity $20 \mathrm{~s}$ after the jet first strikes the plate. For simplicity, assume the velocity of the jet is increased as the cart moves such that the impulse force exerted by the water jet on the plate remains constant.

Graph the region bounded by the graphs of the equations. Then find the area of the region analytically. y = 1/10xe^3x, y = 0, x = 0, x = 2

In the half-reaction $\mathrm{NO}_{3}^{-} \rightarrow \mathrm{NH}_{4}^{+}$, on which side of the equation should electrons be added? Add the correct number of electrons to the side on which they are needed, and rewrite the equation.

The Stanford linear accelerator can accelerate electrons to kinetic energies of $50 \mathrm{GeV}$. What's the de Broglie wavelength of these electrons? Compare with the diameter of a proton, about $2 \mathrm{fm}$.

We all carry 20,000 to 25,000 genes in our genome. So far, patents have been issued for more than 6000 of these genes. Do you think that companies or individuals should be able to patent human genes? Why or why not?

Write the expression using a positive exponent.

$$s^{-9}=$$