What changes were necessary in earth's atmosphere to allow complex organism to evolve

A 7.5 kg block is placed on a table. If its bottom surface area is 0.6 m2, how much pressure dose the block excert on the tabletop? A. 367.5pa B. 122.5pa C. 73.5pa D. 226.5pa

How does increasing the height of the counterweight affect the amount of potential energy of the counterweight?

Ashley walks from building I to building II at a constant speed of 1.3 m/s. It takes her 2 minutes to get to building II from building 1. What is the distance between the two buildings?

When heating food, why do you think the oven gets hot to the touch while the microwave does not?

A tube, open at only one end, is cut into two shorter (non-equal) lengths. The piece open at both ends has a fundamental frequency of 425 Hz, while the piece open only at one end has a fundamental frequency of 675 Hz, both in room temperature air.

Describe one example of competiton of tropical dry forest

What is the center of a tornado called A. the eye B. The center C. The middle road D. The vortex

Is it legal in Florida for a math teacher forces the kids to do push ups?

Acceleration is best defined as the rate of change of blank of an object

Zirconium has an atomic number of 40. How many neutrons are there in an isotope of zirconium-92?