How much of the earths water is usable as a freshwater resource

Which type of light bulb uses more power, a 100 w light bulb or a 50 w light bulb

How do you best determine whether j/m2 and m*s2/N are equivalent units? Compare the written form of the units to see if they look the same. Notice that one unit contains joules and other newtons.

In a periodic table a set of properties repeats from?

Two reason friction occurs between surfaces

What happened when electricity flows through an object

Marina is using a metal spoon to stir her soup. Why does the soup feel warm? Marina's hand warms the spoon she is holding heat energy from the soup is transferred to the spoon heat energy from the spoon is transferred to the soup

A 1180kg car is moving at a speed of 85.5 km/h. Find the force needed to bring the car to rest in a distance of 300m

Which best states the author's argument in catching sun rays? no power source is clean, free, and renewable. it costs too much to use solar energy for power. the use of solar energy can cause blackouts in big cities.

A possible means of space flight is to place a perfectly reflectingaluminized sheet into orbit around the Earth and then use the lightfrom the Sun to push this "solar sail." Suppose a sail of area5.

An electric circuit consists of a variable resistor connected to a source of constant potential difference. If the resistance of the resistor is doubled, then