A child is sledding. He starts at the top of the hill with a velocity of zero, and 3 seconds later he is speeding down the hill at 12 meters per second. What is the child's acceleration?

Which event happens when a star is forming

When temperatures are near absolute zero, what process causes atoms to begin to clump? a. Plasmology c. Cornell-Weisman condensation b. Condensate d. Bose-Einstein condensation

The 7.2 N weight is in equilibrium under the influence of the three forces acting on it. The F force acts from above on the left at an angle of alpha with the horizontal. The 5.

If a girl is standing in front of a smooth surface from which a sound is reflected, the girl may hear A. reflected waves with a higher intensity than the original sound source. B.

Which of the following objects works by burning fuel to push hot air toward the ground and create thrust to use in lifting off? a. rocket c. space station b. space probe d. all of the above

A model rocket is fired vertically from the ground with a constant acceleration of 45.3 m/s2 for 1.46 s at which time its fuel is exhausted. What is the maximum height (in m) reached by the rocket?

A crude approximation for the x component of velocity in an incompressible laminar boundary layer is a linear variation from u = 0 at the surface (y = 0) to the freestream velocity, U, at the boundary-layer edge (y = δ).

Why did dad leave mom?

Sal drew the electron dot diagram of an aluminum atom as shown. How should Sal correct his diagram? He should add five more dots so that the atom obeys the octet rule. He should add ten more dots so that all thirteen electrons are shown.

What uses electricity