Manuel wants to determine how fast a toy car will move across different surfaces. he lines 3 ramps with different surface covers including wax paper, sandpaper, amd smooth carpet and runs the same car down each ramp to determine how long it takes for the car to reach the bottom. what is manuel's independent variable in this experiment?

Which quantities are scalars? choose all that apply a.distance b.speed c. acceleration d.velocity

The bar of prob. 5/82 is repeated here. the ends of the 0.4-m bar remain in contact with their re- spective support surfaces. end b has a velocity of 0.5 m/s and an acceleration of 0.3 m/s2 in the di- rections shown. determine the angular accelera- tion of the bar and the acceleration of end a.

Daughter element the new element produced along with a decay particle in a nuclear transmutation 2. half-life the substance that decays in a nuclear transmutation 3. parent element the change of one chemical element into another by nuclear decay or radioactive bombardment 4. transmutation the time required for the decay of one-half of the atoms in a sample of radioactive material