What's the difference between a physical and chemical change and how do you know which is happened?

A string with a length of 4.00 m is held under a constant tension. The string has a linear mass density of μ = 0.006 kg/m. Two resonant frequencies of the string are 400 Hz and 480 Hz. There are no resonant frequencies between the two frequencies.

Steam is more dangerous than the boiling water because it has more a. Temperature b. Energy c. Heat

Which color of light refracts at the greatest angle when white light is incident on a prism?

two 2.5 kg balls move away from each other one traveling 3 m/s to the right the other 4 m/s to the left what is the magnitude of the total momentum of the system? answer in units

A screen is placed between two lamps so that they illuminate the screen equally. The first lamp emits a luminous flux of 1375 lm and is 5 m from the screen.

A 5.0 kg object moving at 5.0 m/s. KE = mv2 times 1/2

Before designing the filter, one must understand the relationship between the output voltage of the circuit and the frequency. For a series RLC circuit, how do the impedances of the circuit elements depend on the frequency? a.

A ball rolls down an incline and off a horizontal ramp. Ignoring air resistance, what force or forces act on the ball as it moves through the air just after leaving the horizontal ramp? a). The weight of the ball acting vertically down.

How many atoms are in a sample of 1.83 moles of potassium (K) atoms? A) 3.04 * 10-24 atoms K B) 3.29 * 1023 atoms K C) 1.10 * 1024 atoms K D) 6.02 * 1023 atoms K

If a single mutation turns off the growth of some pairs of legs within an organism, what's most likely affected? a. A substituted gene b. A deleted gene c. A duplicated gene d. A Hox gene