Aplane accelerates down a runway. the plane accelerates at 2 m/s/s for 10 seconds and obtains a speed of 20 m/s. what speed would a second plane obtain if it had double the acceleration for double the time of the first plane? a) 20 m/s b) 40 m/s c) 80 m/s d) 160 m/s

Física: un futbolista patea hacia el arco con una velocidad de 15m/ah, calcular: a)el alcance para un ángulo de tiro de 25º, b) el tiempo que el balón permanece en el aire.

What type of force holds atoms together in a crystal?

Certain bacteria (such as aquaspirillum magnetotacticum) tend to swim toward the earth’s geographic north pole because they contain tiny particles, called magnetosomes, that are sensitive to a magnetic field. if a transmission line carrying 100 a is laid underwater, at what range of distances would the magnetic field from this line be great enough to interfere with the migration of these bacteria? (assume that a field less than 5% of the earth’s field would have little effect on the bacteria. take the earth’s field to be 5.0 * 10-5 t, and ignore the effects of the seawater.)