A negative test charge −q is released from rest at a distance r away from a sphere of charge +Q, and a distance 2 r away from a sphere of charge +2Q. The charged spheres are fixed in place. System of charges arranged in a horizontal line. Test charge minus Q is in the middle position. Charge plus Q located a distance R to the left. Charge +2Q located a distance 2R to the right. In what direction does the test charge move immediately after being released?

Scientists use laser range-finding to measure the distance to the moon with great accuracy. a brief laser pulse is fired at the moon, then the time interval is measured until the "echo" is seen by a telescope. a laser beam spreads out as it travels because it diffracts through a circular exit as it leaves the laser. in order for the reflected light to be bright enough to detect, the laser spot on the moon must be no more than 1.0 km in diameter. staying within this diameter is accomplished by using a special large-diameter laser. part a if λ = 540nm , what is the minimum diameter of the circular opening from which the laser beam emerges? the earth-moon distance is 384,000 km. express your answer to two significant figures and include the appropriate units.

Herbivores, carnivores, and omnivores are all types a. decomposers b. producers c. consumers d. biomes

Will give brainliest! jay rides his 2.0-kg skateboard. he is moving at speed 5.8 m/s when he pushes off the board and continues to move forward in the air at 5.4 m/s. the board now goes forward at 13 m/s.a. determine jay’s mass.b. determine the change in the internal energy of the system during this process.(express your answer to two significant figures and include the appropriate units.)