These are his friends. Is that an observation or an inference?

While performing an experiment to establish relationship between weight of a rectangular wooden block lying on a horizontal table and the minimum force required to just move it using a spring balance, a student calculated the minimum force required

A 1.5m wire carries a 4 A current when a potential difference of 78 V is applied. What is the resistance of the wire? ohms

Equal and opposite forces that act on the same object are called

Classify the type of plate boundary where the appalachian mountains formed. how have they changed since their formation

How can a parked car move? a. add force to balance all forces b. remove force to balance all forces c. add force to unbalance the forces d. remove all forces

Which of the following best characterizes the free energy change ΔG for an endothermic reaction under physiological conditions? A. The sign of ΔG is positive B. The sign of ΔG is zero C. The sign of ΔG is negative D.

In a recent hockey game, one player (m=100kg) was moving at a velocity of 8 m/s when he ran into another player (m=300kg) who was at rest (v=0m/s). After the collision, the two players were stuck together (moving with the same velocity).

In a laser, electrical energy is changed to light energy, and a small amount of the energy is wasted as heat. Describe the total amount of the heat in the system (using the conservation of energy).

What is the name for a star and planets held together by gravity? A. solar system B. galaxy C. black hole D. supernova

When a car turns a corner on a level road, which force provides the necessary centripetal acceleration? 1) gravity 2) normal force 3) air resistance 4) tension 5) friction