Two of Dalton's theories were disproven:

1. All atoms of a given element are the same.

2. Atoms can't be divided into smaller pieces.

Q: Who disproved theory 1?

A:?

Q: Who disproved theory 2?

A: J. J. Thompson?

A 60 kg zebra is traveling 8 m/s east. What is the zebra's momentum? kg-m/s

It is known that the 10 kg pipe will roll up the ramp and not slide on the ramp when P becomes sufficiently large. Using the rolling assumption, find the minimum P required to cause impending motion of the 10 kg pipe up the ramp.

Which period of rock art in africa was the first to develop?

Two plane mirrors are separated by 120°, as the drawing illustrates. If a ray strikes mirror M1 at a θ1 = 64° angle of incidence, at what angle θ2 does it leave mirror M2?

High rate of evaporation in a water cycle can most likely cause Select one: a. floods b. droughts c. blizzards d. thunderstorms

A concave mirror has a focal length of 11 cm. What is its radius of curvature?

Assume each tick mark represents 1 cm. Calculate the total displacement from 0 if an object moves 3 cm to the left, then 7 cm to the right, and then 6 cm to the left. The object moves cm to the left. What is the total distance the object travels? cm

A sound wave has a frequency of 510 Hz in air. Which of these is closest to the wavelength of this sound? (The speed of sound in air is 343 m/s.

The diagram below shows the process of distillation of saltwater into pure water. Where is the pure water in the diagram? a. A b. B c. C d. D

In what ways, would understanding the body positions, directions, and planes assist you with tasks related to the integumentary, skeletal/muscular, and digestive systems