Visitor activity

........

Public contributions from visitors who posted under the name .........

Questions 230
Answers 0

Recent questions

Latest questions from ........

Which feature will each question help to identify? Continental shelf Ocean trench Rift valley Seamount Is the feature located in the deepest part of the ocean? Is the feature in the middle of a mid-ocean ridge? Is the fe...
1 answer
Which process in the model represents condensation? As water vapor transfers heat to ice cubes, it forms clear droplets outside the plastic wrap. As water vapor gains heat from ice cubes, it forms clear droplets outside...
1 answer
The thermal energy in a hot iron flows into a shirt. What can possibly be said about this situation? The iron is warmer than the shirt. The iron has less energy than the shirt. The iron is 92°C and the shirt is 96°C. The...
1 answer
A circuit contains two light bulbs connected in parallel. What would happen to the brightness of each light bulb if two more light bulbs were added in parallel to the first ones? The brightness of each bulb would decreas...
1 answer
Which best explains why aluminum is a nonrenewable resource? It cannot be quickly replaced. It is expensive to process. It conducts electricity. It is useful to humans
1 answer
circuit has a current of 2 A. If the resistance in the circuit decreases to one-fourth of its original amount while the voltage remains constant, what will be the resulting current? 0.5 A 2 A 4 A 8 A
1 answer
Which waves can travel through space? electromagnetic waves only mechanical waves only electromagnetic and mechanical waves longitudinal and electromagnetic waves
1 answer
Horatio drew a diagram to illustrate how magnetism is produced by electric currents. A copper colored wire has arrows emerging from its sides pointing away. The arrows are labeled magnetic field. Which best explains Hora...
1 answer
How are the electric field lines around a positive charge affected when a second positive charge is near it? The field lines combine with the lines around the second positive charge. The field lines overlap with the line...
1 answer
Which current is produced in homes? magnetic voltage alternating direct
1 answer
In which direction of the wave motion do longitudinal waves transfer energy? perpendicular parallel close equal
1 answer
How are the current and resistance related when the voltage of a circuit is constant? The current doubles when the resistance doubles because they are directly proportional. The current doubles when the resistance double...
1 answer
A circuit has a current of 2 A. If the resistance in the circuit decreases to one-fourth of its original amount while the voltage remains constant, what will be the resulting current? 0.5 A 2 A 4 A 8 A
1 answer
Masako measures a circuit at 12 V and 2 A. Using Ohm's law, what can he calculate for the circuit? resistance () resistance (O) current (I) current ()
1 answer
A positively charged object is placed to the left of a negatively charged object. Which best describes how the positively charged object will move? to the left, in the direction of the electric field lines to the right,...
1 answer
Parker wound a wire around a large iron nail. He then created an electromagnet by connecting the ends of the wire to different batteries. The table shows the current he measured for each electromagnet. A 2-column table w...
1 answer
A circuit has a current of 1.2 A. If the voltage decreases to one-third of its original amount while the resistance remains constant, what will be the resulting current? 0.3 A 0.4 A 1.2 A 3.6 A
1 answer
Measurements of two electric currents are shown in the chart. Which best compares the two currents? Current X has a greater potential difference, and the charges flow at a slower rate. Current Y has a greater potential d...
1 answer
Which unit is used to measure resistance? volts charges amperes ohms
1 answer
What must be true in order for magnetism to induce an electric current in a wire? There needs to be a switch in the circuit. There cannot be a switch in the circuit. The wire must be part of a closed circuit. The wire mu...
1 answer
Which best compares a brush and a commutator in an electric motor? Both rotate when the motor is on. Both carry electrical current from a power source. Both remain stationary when the motor is on. Both have a permanent m...
1 answer
What does voltage describe? how fast current can flow how much current can flow how much a material resists electrical flow how fast a material conducts electrical flow
1 answer
Which best contrasts an electric generator and an electric motor? In a generator, slip rings function as a solenoid, and in a motor, an armature functions as a solenoid. In a motor, slip rings function as a solenoid, and...
1 answer
Which type of current flows in only one direction and is produced by a battery? magnetic voltage alternating direct
1 answer
The left side of the armature in an electric motor is pushed down. When the current changes direction, how is the motion of the armature affected? It is pulled up on the left side. It is pulled up on the right side. It i...
1 answer

Recent answers

Latest answers from ........

No public answers found for this visitor name.