Calculate the heat required to change 2.0kg of ice at 0°C to water at 0°C

Acamcorder has a power rating of 20 watts. if the output voltage from its battery is 9 volts, what current does it use?

Identify some abiotic characteristics of the tundra biome.

An astronaut on the moon throws a baseball upward. the astronaut is 6 ft, 6 in. tall, and the initial velocity of the ball is 3030 ft per sec. the height s of the ball in feet is given by the equation s equals negative 2.7 t squared plus 30 t plus 6.5s=−2.7t2+30t+6.5, where t is the number of seconds after the ball was thrown. complete parts a and b.