A 10,000 N piano is dropped from the top of a building. When the piano reaches terminal speed… a. What is the net force on the piano? b. What is the force of air resistance on the piano?
the metal wire in an incandescent lightbulb glows when the light is switched on and stops glowing when it is switched off. the simple process in which kind of a change
two identical parallel-wired strings of bulbs are connected to each other in series. if the equivalent resistance of the combination is 130 ohms when it is connected across a potential difference of 120 volts, what is the resistance of each individual bulb
an 18 ohm resistor and a 6 ohm resistor are connected in parallel to a battery, and the current in the 18 ohm resistor is found to be .45 amps. find the potential difference across the battery
an 11 ohm resistor and a 6 ohm resistor are connected in series with a battery. the potential difference across the 6 ohm resistor is 9 volts. find the potential difference across the battery
which is heavier, a one ton box or a one metric ton box? How many pounds heavier is one than the other?
How does weathering alter the surface of land? Is it D? A. The landscape is changed as large rocks form deltas where an ocean meets a river. B. The landscape is altered by the creation of new hills or shapes such as a delta at the end of a river's course to the sea. C. Existing rocks are broken into smaller fragments, freeing the pieces to be moved away. D. The shape of a beach or a hill can be changed as smaller particles are moved away.
Atoms of elements at the top of a group on the periodic table are smaller than the atoms of elements at the bottom of the group. How does this help explain the difference in the reactivity of metals within a group?
