Who was the first to hypothesize that electron orbit a positively charged nucleus

How does changes in distance affect the gravitational pull between two objects? Describe and give one example.

What is one way space travel affects the human body?

A horse has an acceleration of 2 m/s2. If it starts from rest, how fast is it going after 1.7 seconds?

Which statement does NOT explain the concept of the Doppler Effect? A) As an observer approaches a stationary sound, the sound waves are compressed, making the pitch higher.

2. Which of the following is closest to 1 meter in length? A. a penny B. the width of a door C. the height of a room D. the size of the Earth.

A motorist driving at 25 meters/second decelerates to 15 meters/second. The combined mass of the vehicle and the driver is 1.5 * 10³ kilograms. What is the amount of mechanical work done by the vehicle?

All forces are different each exerts a particular type of effect on an object

Witch statement about polymers is true

Two bullets have masses of 3,0 g and 6.0g, respectively. both are fired with a speed of 40.0 m/s. Which bullet has more kinetic energy? What is the ratio of their kinetic energies

What does it mean that a form of energy might take more energy to harness than it provides? Are renewable resources always renewable, or can they become non-renewable? Why aren't renewable resources used for everything that we use energy for?