A chainsaw used 4000 J in 180 s. Calculate the power used, in watts.

The technology in which parabolic mirror arrays are placed in a desert with a water-filled pipe traversing the array is used to capture the renewable energy of:

Describe what causes day and night

How can a surface be smooth/polished for some waves and not for others? (This is an important question, refer to the homework on WebAssign and question regarding whether a surface is smooth/polished for some electromagnetic waves verses others)

1. Why do herbivores and carnivores have different types of teeth 2. Why is breathing necessary? Describe how air reaches inside the body of an insect. • How do fish breathe under water? Snakes do not have legs.

Two slits separated by 0.10 mm are illuminated with green light (l = 540 nm). calculate the distance (in cm) from the central bright-region to the fifth bright band if the screen is 1.0 m away.

Which defintion of heat is most scientifically accurate

What is the name of the effect that causes water to travel at an angle to trade winds?

Two books with different masses fall off the same bookshelf. As they fall, which has more kinetic energy and why

Which of the following is an example of convection? a a hot object transferring heat to a cooler one b the rays of the Sun warming the earth c a hot oven warming the air around it d hot air rising and cooler air falling

Bob drove from home to work at 60 mph. after work the traffic was? heavier, and he drove home at 50 mph. his driving time to and from work was 1 hour and 28 minutes. how far does he live from his? job?