If element X has 39 protons, how many electrons does it have?

Resonance in air column is used in which of these musical instruments Trumpet Drums guitar violent Trumpet makes the most sense

At a constant pressure and a temperature of 280 K, the gas in a cylinder has a volume of 10.0 liters. If the volume of the gas is increased to 20.0 Liters what is the new temperature?

Determine the height of this object: a 1-kg pendulum has a speed of 2 m/s. A. 9.8 m B. 2 m C. 7.8 m D. 0.20 m

How does football use energy to influence or change matter?

The octane rating of a fuel is a good indicator of how much power the fuel can deliver during oxidation

The friends now feel ready to try a problem. Suppose an Atwood machine has a mass of m1 = 2.5 kg and another mass of m2 = 8.5 kg hanging on opposite sides of the pulley. Assume the pulley is massless and frictionless, and the cord is ideal.

What are the 3 main branches of natural sciences

A girl is walking 2km north them east then south then west whar is her displacement

Find the y-component of this vector:73.3,12.0m. Remember, angles are measured from the + x axis.

A smaller unit of volume than a milliliter would be a microliter. A microliter is one-millionth of a liter. Select one: a. True b. False