what is an expression representing a chemical reaction; the formula of the reactants are connected by an arrow with the formulas for the products

An aerobatic airplane pilot experiences weightlessness as she passes over the top of a loop-the-loop maneuver. The acceleration of gravity is 9.8 m/s 2 . If her speed is 320 m/s at this time, find the radius of the loop. Answer in units of km.

Calculate the equivalent of 20 degrees Celsius in degrees Fahrenheit and Kelvin.

A small sphere with mass 5.00.*10-7kg and charge + 3.00μC is released from rest a distance of 0.600 m above a large horizontal insulating sheet of charge that has uniform surface charge density σ=+8.00pC/m2.

What is the acceleration of a 10 kg mass pushed by a 5 N force?

How does the nucleus of a copper atom compare to the nucleus ofa nickle atom?

A CFL bulb has an efficiency of 8.9% and a power of 22 W. How much light energy does the lightbulb produce in 1 second

Which of the following is true of high clouds?

A ferris wheel takes 5 minutes to complete one full rotation, what is the angular velocity of the ferris wheel

A heat engine has a thermal efficiency of 45%. how much power does the engine produce when heat is transferred into it at a rate of 109 kj/hr?

Dos pelotas de tenis se lanzan verticalmente, hacia arriba y desde el mismo punto, con 2 s de diferencia. La velocidad inicial de la primera es de 20 m/s, y la de la segunda, de 30 m/s.