What is the purpose of a tuner in a radio? The tuner selects only the signal of a specific frequency and rejects the rest.

The tuner converts inaudible high-frequency signals into sound waves that can be heard.

The tuner detects a wide range of broadcast frequencies.

The tuner converts a direct current into a high-frequency alternating current.

30 points - when can a theory be modified if a new type of technology allows for new observations that raise new questions? a. immediately, while the questions about the theory are being asked b. after new hypotheses related to the theory are tested in experiments c. only after the new observations disprove all parts of the theory d. while scientists begin to think about how the theory could improve

Apositive charge moves in the direction of an electric field. which of the following statements are true? check all that apply. check all that apply. 1.the potential energy associated with the charge decreases. 2. the electric field does positive work on the charge. 3. the electric field does negative work on the charge. 4. the potential energy associated with the charge increases. 5. the electric field does not do any work on the charge. 6. the amount of work done on the charge cannot be determined without additional information.

While the change in blank will remain the same during a collision, the force needed to bring an object to a stop can be blank if the time if collision is blank