When people talk about new sources of energy, do they mean discovering new sources of energy or new ways to capture and convert energy?

A raft is made of 10 logs lashed together. Each is 56cm in diameter and has a length of 6.1m. How many people can the raft hold before they start getting their feet wet, assuming the average person has a mass of 69 kg?

Neglecting the effect of air resistance a stone dropped off a 175-m high building lands on the ground in: A) 3s B) 4s C) 6s D) 18s E) 36s

What is the sig fig of 200

A scientific_ is a rule used to discribe a pattern seen in nature not an examplanation of why that patten might occur

A child in a boat throws a 5.10-kg package out horizontally with a speed of 10.0 m/s. the mass of the child is 27.6 kg and the mass of the boat is 34.2 kg calculate the velocity of the boat immediately after, assuming it was initially at rest.

The driver of a car traveling at 32 m/s applies the brakes and undergoes a constant deceleration of 2.25 m/s^2.

You are going to develop some photographic film that involves a chemical reaction between the developer, which you will mix yourself, and a chemical on the surface of the film.

Would time travel mean that parallel universes would be created off our linear time sequence to ensure the universe doesn't collapse itself because of significant events being drastically changed in the way it shapes the universe?

What is the central core of hair

A star with the same mass of the sun has a newly discovered planet whose semi-major axis of 2.48 au and an eccentricity of 0.08. what is the aphelion distance of the new planet