Aspring stretches in relation to the weight hanging from it all cording to the equation y equals 0.75x +0.25 where x is the weight in pounds and why is the length of the spring in inches

The number of revolutions of two pulleys is inversely proportional to their diameters. if a 24-inch diameter pulley making 400 revolutions per minute is belted to an 8-inch diameter pulley, find the number of revolutions per minute of the smaller pulley.

Which has the greater energy, light of wavelength 519 nm or light with a frequency of 5.42 x 10^8 sec^-1?

Which is the best estimate of the product of 0.9 x 0.88? 0 0.25 0.5 1