4. If an effort force of 30 pounds is applied through a distance of 1.5 feet (d_(e)) in a second class lever, how far will the lever lift the load if the distance from the fulcrum to the effort force is 5 feet and the distance from the fulcrum to the load is 3.5 feet?

Waves become larger and bend towards land (refract)when motion within the wave is circular the wave length is less than twice the sea bed depth the wave length is less than half the sea bed depth cliffs are absent

How is all sound produced? A. vibration B. light C. heat D. electricity

On clear day, sunlight delivers approximately 1000 J each second to a $1m^{2}$ surface; smaller areas receive proportionally less-half the area receives half the energy. A $12\% $ efficient solar cell, a square 14 cm on a side, is in bright sunlight. How much electric power does it produce? 0.8 W 1.6 W 2.4 W 3.2 W

The radius of Jupiter is 11 times that of earth, and the free-fall acceleration near its surface is 2.5 times that on earth If we someday put a spacecraft in low Jupiter orbit, its orbital speed will be greater than that for an earth satellite. less than that for an earth satellite the same as that for an earth satellite

A typical compact disk has a mass of 15 g and a diameter of 120 mm. What is its moment of inertia about an axis through its center perpendicular to the disk? $2.7\times 10^{-5}kg\cdot m^{2}$ $5.4\times 10^{-5}kg\cdot m^{2}$ $1.1\times 10^{-4}kg\cdot m^{2}$ $2.2\times 10^{-4}kg\cdot m^{2}$

1. Explain how a freight train moving slowly can have more momentum than a fast-moving car. What does this reveal about the relative importance of mass versus velocity?

An advantage of parallel circuits is that they all listed are correct form a single path through which the current flows. allow current to flow even if some paths are cut. stop transmitting all current if even one resistor breaks.

- What TWO questions related to the Chelyabinsk event are addressed by both the text and the chart? A. How many people were injured by the meteor blast? B. What caused the meteor to explode before hitting the ground? C. What factors contribute to the severity of damage caused by a meteor airburst? D. What materials made up the meteor before it exploded? E. What is the purpose of an airburst warning system?

Which of the following planets received the term "outer" planets? Choose all that apply. Mercury Venus Earth Mars Jupiter Saturn Uranus Neptune

What best describes the orbit of electrons in Bohr's atomic model? specific and circular inside of the nucleus fixed and not moving wave-like