Who was the first scientist to observe cells? a. Theodor Schwann c. Anton van Leeuwenhoek b. Robert Hooke d. Matthias Schleiden

How many electrons does calcium lose when forming an ionic bond with another ion?

When you used the energy in our body to pull the rubber band, it was transformed into elastic potential energy.

In what sense are our bodies machines?

Particle with a mass of 1.7 * 10-20 kg is oscillating with simple harmonic motion with a period of 3.4 * 10-5 s and a maximum speed of 2.6 * 103 m/s. calculate (a) the angular frequency and (b) the maximum displacement of the particle.

In a chemical reaction, water decomposes to form hydrogen and oxygen. Which term names the water? A. an element B. an atom C. a product D. a reactant

A hurricane in the Gulf of Mexico to 15 hours to travel 360 kilometers. What is the average speed of this hurricane in kilometers per hour?

Which organization functions to privide clinics and surgeries i developing nations

What role do convection currents play in oceans and the atmosphere?

What causes density currents to form in the mediterranean sea? a. condensation b. evaporation c. transpiration d. upwelling

How long does it take a car to travel 450 km at 75 km/hr