The diagram shows the set-up for an electric doorbell. Which best explains why the bell would not ring in this set-up?

The circuit is open.

The electromagnet has an iron core.

The circuit is closed.

The electromagnet is made of steel.

What are the concepts of dynamically continuous innovation and discontinuous innovation? Can you share examples to illustrate them in action?

Which type of radioactive decay results in no change in mass number and atomic number for the starting nucleus?

If a person weighs 900 N on Earth, then that same person is recorded to weigh 2125 N on Planet X, what is the acceleration due to gravity of Planet X? 40.98 m/s^2 5.78 m/s^2 23.16 m/s^2 33.09 m/s^2

After a short time, an equilibrium is reached between the diffusion currents (also called recombination currents) and a second, opposing type of current. what causes these secondary currents?

Which of the following would cause a decrease in competition in a desert ecosystem?

A motorist driving at 25 meters/second decelerates to 15 meters/second. The combined mass of the vehicle and the driver is 1.5 * 10³ kilograms. What is the amount of mechanical work done by the vehicle?

All forces are different each exerts a particular type of effect on an object

Witch statement about polymers is true

Two bullets have masses of 3,0 g and 6.0g, respectively. both are fired with a speed of 40.0 m/s. Which bullet has more kinetic energy? What is the ratio of their kinetic energies

What does it mean that a form of energy might take more energy to harness than it provides? Are renewable resources always renewable, or can they become non-renewable? Why aren't renewable resources used for everything that we use energy for?