Choose the BEST answer to the following: Thermal conduction mainly involves (a) electrons. (b) protons. (c) neutrons. (d) ions.

How did they get this answer 3.3,2.7 cm

The escape velocity of any object from Earth is 11.2 km/s. (a) Express this speed in m/s and km/h. Speed, m/s: 11200 Speed, km/h: 40320 (b) At what temperature would oxygen molecules (molecular mass is equal to 32 g/mol) have an average velocity, v, 'ms' equal to Earth's escape velocity 11.2 km/s? Temperature: 1,89 ×108 K No, that's only partially correct

The ceramic glaze on a red-orange Fiestaware plate is U2O3 and contains 50.0 grams of 238U , but very little 235U. If energy is worth 12.0 cents per kW.h , what is the monetary value of the energy emitted? (These plates went out of production some 30 years ago, but are still available as collectibles.)

A pound of body fat stores an amount of chemical energy equivalent to 3,500 Cal. When sleeping, the average adult burns or expends about 0.42 Cal/h for every pound of body weight.How long would the person have to sleep continuously to lose 1 lb of body fat? (Assume the person weighs 150 lb.) Answer in hours.

Why do we say that the elementary units of matter or “building blocks” must be some basic unit of massenergy rather than only of mass?

Calculate AH, AS, and AG at 298 K for the reaction below. Please take note of units. B2H6(g) 2BH3(g) B2H6(g) 2BH3(g) AH 35 (kJ/mol) 110.0 IS 232.0 (J/mol-K) 188.0 AHxn kJ J/mol·K AGrxn kJ 關 %3D

Answer the following. (a) How much energy is necessary to heat 2.0 kg of water from room temperature (20°C) to its boiling point? (Assume no energy loss.)kcal(b) If electrical energy were used, how much would this cost at 15¢ per kWh?

When a solid sample was heated, its temperature increased but it did not melt. What has happened to the average molecular kinetic energies of the atoms in the sample and why? A Kinetic energy remained the same because potential energy decreased B Kinetic energy remained the same because potential energy increased C Kinetic energy decreased because the temperature increased D Kinetic energy increased because the temperature increased A spoon, a fork, and a knife are stacked on top of each other overnight. The temperature of both the fork and spoon is 21°C the next morning. According to thermal equilibrium, what can be predicted about the temperature of the knife? A The temperature of the knife is also 21°C because equilibrium has been reached between all three objects. B The temperature of the knife could only be determined through measurement. C The temperature of the spoon and fork are both conducted to the knife giving it a resulting temperature of 42°C. D The temperature of the…

< 2:30 1 4 7 +/- The activation energy Ea for a particular reaction is 42.2 kJ/mol. How much faster is the reaction at 343 K than at 315 K? (R = 8.314 J/ mol. K) 2 5 8 Question 1 of 13 . 3 60 9 O Submit Tap here or pull up for additional resources XU x 100