What does an atomic number describe?

The number of nuclei

The number of protons

The number of neutrons

The number of electrons

From a height of 40.0 m, a 1.00 kg bird dives (from rest) into a small fish tank containing 50.5 kg of water. Part A What is the maximum rise in temperature of the water if the bird gives it all of its mechanical energy

This equation indicates that the reaction gives off heat. What is this type of reaction called? C3H8 + ? O2 → 3CO2 + 4H2O + heat A. synthesis reaction B. decomposition reaction C. endothermic reaction D. exothermic reaction

What is the kinetic energy in joules of a 0.05. kg bullet traveling 310 m/s

A wagon is pulled at a speed of 0.40metets/seconds by a horse exerting an 1,800 Newton's horizontal force. what is the power of this horse?

The public is not yet able to purchase hydrogen fuel cell powered cars because engineers have to determine how the cars perform A. On racecar tracks B. In real-world conditions C. In flooded environments D. On closed courses

If the volume of a hot air balloon remains constant, what happens as the temperature of the air inside the balloon increases?

What is the correct formula for electrical power? l

Bernie drove home from a vacation in 1.5 hours. He traveled a total distance of 60 miles. What was his average speed in miles per hour

What advice a personal trainer most likely give u before a workout

An elevator supported by a single cable descends a shaft at a constant speed. The only forces acting on the elevator are the tension in the cable and the gravity. Which one of the following statements is correct? Group of answer choices A.