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

How do you determine the direction of current via multimeter?

Earth's atmosphere is constantly bombarded by cosmic ray protons that originate somewhere in space. If the protons all passed through the atmosphere, assume that each square meter of Earth's surface would intercept protons at the average rate of

From just the atomic number, what else is known? a) the chemical number b) the number of neutrons c) the atomic mass d) the number of protons

Sound moves at a speed of 343 meters per second through air, a gas. Which pairing is most accurate for how sound will travel through liquid and solid?

A 1.55 kg falcon catches a 0.415 kg dove from behind in midair. What is their velocity after impact if the falcon's velocity is initially 27.5 m/s and the dove's velocity is 5.35 m/s in the same direction?

Which statement about an electron in the 4d state is correct? A. The magnitude of its orbital angular momentum is 6√ℏ. B. The largest orbital angular momentum it could have in any given direction is 4ℏ. C.

A D note has a frequency of 587.33 Hz. Calculate its wavelength in meters. The speed of sound is 343 m/s

A cyclist allows his bike to roll down a hill without pedaling. Towards the bottom of the hill he applies his brakes. The bike comes to a stop. Applying the brakes causes the brakes to warm up. Describe the energy transfers that have occurred.

An object is placed in a fluid and then released. Assume that the object either floats to the surface (settling so that the object is partly above and partly below the fluid surface) or sinks to the bottom.

Explain why it is important to have strong core muscles?