Two atoms that are isotopes of one another must have a different number of what?

electrons

neutrons

protons

all particles

A fish appears to be 3 m below the surface of a pond when viewed almost directly above by a fisherman. What is the actual depth of the fish? (n water = 1.

How many electrons must be transferred to a body to produce a charge of 125 nc?

A jet plane is flying at a constant altitude. at time t1=0 it has components of velocity vx = 94 m/s, vy = 110 m/s. at time t2 = 33.5 s the components are vx = 175 m/s, vy = 45 m/s. part a for this time interval calculate the average acceleration.

A child pulls a sled along a rough horizontal surface by applying a constant 20 N force at an angle 60 o above the horizontal. How much work does the child do, in Joules, by pulling the sled 15 meters?

What happens to the sound of a train whistle as a train approaches and passes you? why?

Name of group to which hydrogen belongs to

Which would increase the reaction rate? Check all that apply. A. Raising the temperature B. Stirring the reaction C. Raising the activation energy D. Adding a catalyst

How much of the electrical energy transformed by a common light bulb becomes heat energy?

What is the current for a 1200W microwave connected to 110V outlet.

If a negatively charged particle enters a region of uniform magnetic field which is perpendicular to the particle's velocity, will the kinetic energy of the particle increase, decrease, or stay the same?