1
Is time identified as a scalar quantity?
Yes
Moving a length of copper wire through a magnetic field may cause the wire to have a
potential difference across it
Speed, distance, time and energy are
scalar quantities
The sum of the potential and kinetic energy
mechanical energy
A charge
coulomb
Two 20 newton forces act concurrently on an object. What angle between these forces will produce a resultant force with the greatest magnitude.
45 degrees
A sound wave traveling eastward aire causes the air molecules to
move northward, only
sound waves
What is the equation for weight in newtons?
W=mg
What direction to centripetal force and centripetal acceleration vectors go towards?
The center of the circle
The centripetal force acting on the space shuttle as it orbits Earth is equal to the shuttle's
weight
Which particles are not affected by the strong force?
electrons
Are mass and inertia the same thing?
yes
What is the acceleration equal to on a v vs t graph equal to?
the slope
What must an unbalanced force produce?
acceleration
An 8 newton wooden block slides across a horizontal wooden floor at constant velocity. What is the magnitude of the force of kinetic friction between the block and the floor?
2.4 N
In a process called pair production, an energetic gamma ray is converted into an electron and a positron. It is not possible for a gamma ray to be converted into two electrons because
charge must be conserved
What is conserved in all collision systems?
momentum
Is the relationship between gravitational potential energy and height direct or indirect?
direct
What must occur for kinetic energy to change?
velocity
A car uses its brakes to stop on a level road. During the process, there must be a conversion of kinetic energy into
internal energy
a moving charged particle
In what direction do all electric field lines point?
the force on a positive test charge
What do all charge changes occur from?
movement of electrons not protons
What is the result of adding a resistor in series?
increases total resistance