Why might steps in scientific methods be skipped or changed

Joan is setting up an experiment in the lab to observe newton's second law of motion. she has a model car that has a mass of 45 kg, and it is accelerating at 7 m/s/s. she then increases the acceleration to 28 m/s/s.

Which two wire properties would provide the greatest resistance to the flow of a current? A. short, thin B. long, thin C. hot, thick D. cool, thick

3. Which of the following magnetic scenarios will repel each other? 1. N-N 2. N-S 3. S-N 4. S-S a. 1 and 2 b. 2 and 3 c. 1 and 4 d. 3 and 4

which of the following is a major disadvantage of nuclear power A. high air pollution B. toxic waste materials C. we lack the technology to use it widely

In a double-slit experiment, if the central diffraction peak contains 13 interference fringes, how many fringes are contained within each secondary diffraction peak (between m = + 1 and + 2 in Dsinθ=mλ).

Does a rolling basketball have kinetic energy

Noah Formula is in an airplane which is flying at constant speed in a circular course of radius 6500 m, circling O'Hare's airplane prior to landing. Noah observed that the plane completes each round trip in 345 seconds (5 minutes & 45 seconds).

What happens to particles when a substance gains energy and changes state?

The density of mercury is 13,600 kg/m³. Determine the mass of 10.0 cm³ of mercury.

A force of 250 N is applied to an object that accelerates at a rate of 10m/sec2. What is the mass of the object?