Light hits a clear plastic bottle and a granite rock. which choice most accurately describes the effect of visible light on the clear plastic and a grey rock?

1. visible light is absorbed by both the rock and the plastic, making both objects warmer. visible light is also reemitted by both objects, allowing visible light through the rock and the plastic.

2. visible light is absorbed by both the rock and the plastic, making both objects warmer. some of the light hitting the rock is reemitted, allowing visible light through the rock. none of the light hitting the plastic is reemitted.

3. visible light is absorbed by the rock, making it warmer. light is also absorbed by the plastic making it warmer. none of the light hitting either object is reemitted.

4.visible light is absorbed by the rock and the plastic making both objects warmer. some of the light hitting the plastic is reemitted, allowing visible light through the plastic. none of the light hitting the rock is reemitted.

Aroll in a paper machine is powered by a separately excited dc machine. operating point 1 (under load): the roll typically operates at 764 rpm and must provide 301 nm of torque to oppose the load of the paper. the armature voltage is 230v for this operating point operating point 2 (no load): when the load is removed the speed of the roll increases to 900 rpm (the field characteristics are unchanged) la ea dev m (a) calculate the maximum torque (units of nm) that the motor can supply with this applied voltage (b) calculate the value of the armature resistance, ra (in ohms) (c) at operating point 1 (loaded condition), the field current, i, and the total input power (armature field), are measured to be to be 10 a and 28,600 w respectively. use this information to calculate the value of the field resistance, rf (in ohms). (d) (d) at operating point 1 (loaded condition), calculate the motor efficiency. express your answer as a percent to at least 2 significant digits. (d) if the field voltage is reduced by 1/2, calculate the new stall torque (in nm) of the motor (f). if the field voltage is reduced by 1/2, calculate the new no-load speed (in rad/sec)

In positive numbers less than 1, the zeros between the decimal point and a non-zero number are blank significant

The electronic structure or chlorine is 2.8.7 what is the electronic structure of fluorine?