Which oftthe following is the least reliable source of background information for a scientific project? General internet site, government internet site, library reserve section, or scientific journal.

During an observation, it was noticed that light travels as bundles containing certain amounts of energy. What does this evidence reveal about light? A. It travels at a finite speed. B. It demonstrates a behavior of particles. C.

A block with mass 0.470 kg sits at rest on a light but not long vertical spring that has spring constant 85.0 N/m and one end on the floor. A second identical block is dropped onto the first from a height of 4.

What is the purpose of the zig zag line on the periodic table

Sophias total body fat is 30% which places her in the healthy body fat range true or false?

How do brakes change physical forces

Light from the sun travels through space to Earth's atmosphere. Which will light waves do when they move from empty space into matter made up of different gases? A. move at the same speed B. move faster as they transmit C. slow down and refract D.

A 12.5 kg box sliding on a frictionless flat surface tuns into a fixed spring which compresses at a distance x = 14.1 cm. the spring constant is 94.5 kN/m Find the initial speed of the box

An earth scientist who studies hydrosphere

In 1991 four English teenagers built an eletric car that could attain a speed of 30.0m/s. Suppose it takes 8.0s for this car to accelerate from 18.0m/s to 30.0m/s. What is the magnitude of the car's acceleration?

A capacitor with a capacitance of 490 μf is charged to a voltage of 260 v. then a wire is connected between the plates. how many joules of thermal energy are produced as the capacitor