Hi to answer this question you need to be in 5th grade or older
Carlita hangs two balloons from a desk. when they hang normally, they are close together but they do not touch. Carlita rubs both balloons with a wool cloth. What happens when she lets the balloons hang near one another
A. They push one another apart
B. They touch one another and pop
C. They touch one another and stick together
D. They are close together but do not touch

Scientists use laser range-finding to measure the distance to the moon with great accuracy. a brief laser pulse is fired at the moon, then the time interval is measured until the "echo" is seen by a telescope. a laser beam spreads out as it travels because it diffracts through a circular exit as it leaves the laser. in order for the reflected light to be bright enough to detect, the laser spot on the moon must be no more than 1.0 km in diameter. staying within this diameter is accomplished by using a special large-diameter laser. part a if λ = 540nm , what is the minimum diameter of the circular opening from which the laser beam emerges? the earth-moon distance is 384,000 km. express your answer to two significant figures and include the appropriate units.

The voltage applied across a given parallel-plate capacitor is doubled. how is the energy stored in the capacitor affected?

The ph is the a. independent variable b. the dependent variable c. control group