What happens to the molecules in water as it freezes?

The average kinetic energy of the molecules decreases.

The average kinetic energy of the molecules increases.

The molecules give off heat.

The molecules move faster.

What is the cost of using an electric iron rated 340v, 1000w for 24hrs. If electric energy costs 3000tsh per unit? (1unit=1kwh)

The external cover of aeroplane is made up of aluminium instead of iron. Why?

How is thermal energy transferred during conduction? Check all that apply. Thermal energy is transferred between particles that are not touching each other. Thermal energy is transferred between particles that are in direct contact with each other.

A uniform stationary ladder of length L and mass M leans against a smooth vertical wall, while its bottom legs rest on a rough horizontal floor. The coefficient of static friction between floor and ladder is μ.

Weather differs from climate in that weather can change on a daily basis and is not considered a description of year-to-year conditions of temperature and precipitation.

One watt is equal to which of these values? 1 joule/hour 1 joule-hour 1 joule/second 1 joule-second

What are some of the benefits of learned optimism that have been found in research? O A. Fewer health problems O O B. All of these C. Making more money O D. A lower divorce rate

Katie runs 6 km in 0.6 hour, then 5 km in 0.5 hour. Katie's average speed is __ per hour.

A derived unit is a combination of fundamental units. Which of the following is an example of a derived unit? a) centimeter (used to measure distance) b) gram (used to measure mass) c) cubic centimeter (used to measure volume)

Technician A says that a heater core leak can be the result of the coolant wearing a hole through the core. Technician B says that a core leak can be caused by chemical action eating a hole through the core. Who is correct?