Basim’s robotics team builds a robot that travels at 9 m/s and can fire a tennis ball at a target. which would result in a judge who is sitting beside the testing ground observing the tennis ball having a speed of 7 m/s? the robot fires the ball forward with a speed of 7 m/s. the robot fires the ball backward with a speed of 7 m/s. the robot fires the ball backward with a speed of 2 m/s. the robot fires the ball forward with a speed of 2 m/s.

These models show the electron structures of two different nonmetal elements. which element is likely more reactive, and why? element 1 is more reactive because it has fewer electron shells and is toward the top of its group on the periodic table. element 1 is more reactive because it has more electrons in its valence shell and is farther to the right on the periodic table. element 2 is more reactive because it does not have a valence shell close to the nucleus, so it will attract electrons. element 2 is more reactive because it does not have a full valence shell, so it will attract electrons.

What explosion in the upper solar atmosphere releases about as much energy as millions of 100-megaton hydrogen bombs exploding simultaneously?

When a lead acid car battery is recharged by the alternator, it acts essentially as an electrolytic cell in which solid lead(ii) sulfate is reduced to lead at the cathode and oxidized to solid lead(ii) oxide at the anode. suppose a current of is fed into a car battery for seconds. calculate the mass of lead deposited on the cathode of the battery.