Why might people be able to walk barefoot on hot coals of wood without burning their feet?

Which is a major threat to biodiversity? A. Red-billed oxpeckers eat ticks off of impalas' coats in the grasslands of East Africa. B. Mining in the Guinean Forests of West Africa to provide diamond and gold jewelry for humans. C.

Based on relative bond strengths, classify these reactions as endothermic (energy absorbed) or exothermic (energy released) endothermic B2+C2-->2BC A+BC-->AB+C exothermic AB+C-->AC+B A2+C2-->2AC A2+B2-->2AB

In a chemical reaction, activation energy increases the amount of chemical energynumber of particlestemperature of the reactants. This outcome causes the particles to collide, which results in the breaking upformationreaction of new products.

The forces of attraction between molecules in a molecular compound are

A space shuttle is in orbit about the earth at an altitude where the acceleration due to gravity is 8.70 m/s2. What is the shuttle's speed at this altitude? 2.65 * 10 3 m/s 7.45 * 10 3 m/s 7.68 * 10 3 m/s 7.91 * 10 3 m/s

How work done against gravity can be expressed?

An electron is acted on by two electric forces, one of 2.7*10-14 N acting upward and a second of 5.8*10-14 N acting to the right. What is the magnitude of the electric field at the electron's location?

A satellite on a Low Earth Orbit is flying with a speed of 7.65 km/s. The vertical component of the Earth's magnetic field is 35.3 μT at the current location of the satellite.

A central air conditioner uses 4.5 kilowatts. It runs for 10 hours over the course of a day. How much energy does the air conditioner use during that day?

Hich of the following needs is an addition to Maslow's original hierarchy and only appears in the eight-stage revised model