Scientists develop theories to explain natural events. What causes scientists to reject even long-held theories and replace them with newer theories?

Static discharge differs from electric current because static discharge is described by which of the following?

is a climate cycle where the temperature of the Ocean changes because of movements of air and ocean currents. During this period, the trade winds in the south, causing the water to move from the region to the region.

Which measurement can be constant (unchanging) ? A. only speed B. only velocity C. both speed and velocity

The controlled release of nuclear energy in a reactor is accomplished by: allowing the critical mass of fuel to react controlling a chain reaction controlling fission without a chain reaction all of the above

Which processes transfer energy from the core to the photosphere? a) radiation, then friction b) convection, then conduction c) radiation, then convection d) conduction, then friction

An archer defending a castle is on a 15.5 m high wall. He shoots an arrow straight down at 22.8 m/s. How much time does it take to reach the ground?

Four potential forces can act on the ball Which combination of forces will keep the ball in static equilibrium? The length of the arrows represents the magnitude of the force A and B A and C B and D 8. Cand D Submit Force, Mass, and Motion

The resultant of a 50N force acting on an object to the right and a 20N force acting on the object to the left is what

A student conducts and investigation to determine a ball's mass, displacement, velocity and acceleration. (A) Identify each of the following as wither a vector or scalar quantity: Mass, Displacement, Velocity & Acceleration.

A ball is rolling down a hill at + 1.0 m/s, The ball is uniformly accelerating at +4.9 m/s?, What will the ball's velocity be 4.0 s later? +8.9 x 100° m/s +2.0 x 10^1 m/s +2.1 x 10^1 m/s -1.9 x 10^1 m/s