Explain how a pile of ashes has the same mass as the original log before it was burned. What is the law that defines this

What are the two most important processes in the cycling of oxygen in and out of the atmosphere? a. weathering and erosion b. evaporation and precipitation c. photosynthesis and respiration d. lightning fixation and fossil fuel emission

Potential difference of a battery is 2.2 V when it is connected across a resistance of 5 ohm, if suddenly the potential difference falls to 1.8V, its internal resistance will be

Activity 12 an elemental trip through Europe continued

The peak intensity of radiation for a particular star occurs at a wavelength of 2.0 nanometers. In what spectral band is this?

Which property of a substance can be determined using a pH indicato

Material A has a higher thermal conductivity than Material B. Which material will transfer energy by conduction faster?

an electrical iron box having power 400w is operated in 10hours. what will be the energy consumed by the device in commercial unit?

True or False: If your gas pedal jams, you should turn the key to lock to lock the steering wheel.

Pylon cables in the National Grid have some resistance. Power (watts) = Current2 (amperes) x Resistance (ohms) Looking at the power equation above, can you explain why transmitting electricity at a very high voltage is beneficial?

A bicycle racer sprints near the end of a race to clinch a victory. The racer has an initial velocity of 12.1 m/s and accelerates at the rate of 0.350 m/s2 for 6.07 s. What is his final velocity?