What is the concentration of H + ions at a pH = 2

What is the unbalanced force on a car moving with a constant velocity of 25 m/s?

A car is traveling at 20meters/seconds and is brought to rest by applying brakes over a period of 4 seconds what is it's average acceleration over this time interval?

If the density of an object is 60 g/cm^3 and its mass is 20 grams, what is its volume in cm^3? A) 0.33 B) 3 C) 80 D) 1200

A hiker walked 2 blocks North, 1 block West, 3 blocks South, and 3 blocks East. What was the hiker's displacement and total distance?

In a positive correlation, when one variable increases, the other variable

Which kind of information is known about a person if that person's DNA is in a database? A. how old the person is B. where the person was probably born C. some diseases the person might have D. whether the person is likely to commit a crime

A science teacher ran a marathon. After the race she showed her students the silver blanket she was given to keep her warm. A group of students investigated how the colour of the blanket affected how much infrared radiation is absorbed

Students asked to measure the temperature of a reaction beaker recorded the following temperatures. 103.7°C, 108.4°C, 105.8°C, 104.6°C The actual temperature is 105.1°C. Which measurement is the most precise

Two atoms that are isotopes of one another must have a different number of what? electrons neutrons protons all particles

How can you use the newton's second law to find force?