Answer the following question given this paragraph: Two important devices depend on electromagnetic induction: electric generators and electric transformers. Both devices play critical roles in producing and regulating the electric current we depend on in our daily lives. Electric generators use electromagnetic induction to change kinetic energy to electrical energy. They produce electricity in power plants. Electric transformers use electromagnetic induction to change the voltage of electric current. Some transformers increase voltage and other decrease voltage. Q: What type of generators use electromagnetic induction to change kinetic energy to electrical energy? Choices: - conductors - radiators - thermal generators - electric generators A:
electric generators
Answer the following question given this paragraph: Helicopter pilots are quite familiar with rotational kinetic energy. They know, for example, that a point of no return will be reached if they allow their blades to slow below a critical angular velocity during flight. The blades lose lift, and it is impossible to immediately get the blades spinning fast enough to regain it. Rotational kinetic energy must be supplied to the blades to get them to rotate faster, and enough energy cannot be supplied in time to avoid a crash. Because of weight limitations, helicopter engines are too small to supply both the energy needed for lift and to replenish the rotational kinetic energy of the blades once they have slowed down. The rotational kinetic energy is put into them before takeoff and must not be allowed to drop below this crucial level. One possible way to avoid a crash is to use the gravitational potential energy of the helicopter to replenish the rotational kinetic energy of the blades by losing altitude and aligning the blades so that the helicopter is spun up in the descent. Of course, if the helicopter's altitude is too low, then there is insufficient time for the blade to regain lift before reaching the ground. Problem-Solving Strategy for Rotational Energy 1. Determine that energy or work is involved in the rotation. Determine the system of interest. A sketch usually helps. Analyze the situation to determine the types of work and energy involved. For closed systems, mechanical energy is conserved. That is,. Q: Helicopter pilots can recover from piloting errors by decreasing altitude, turning some of their potential energy into what kind of energy? Choices: - electrical - free - active - kinetic A:
kinetic
Q: Answer the following question given this paragraph: The plasma membrane controls what moves inside and outside the cell. Q: What controls what moves inside and outside the cell? Choices: - nucleus - golgi apparatus - mitochondria - the plasma membrane A:
A: the plasma membrane
Question: Answer the following question given this paragraph: Q: What two ways do channels respond during membrane depolarization? Choices: - sequentially and identically - independently and typically - typically and sequentially - independently and sequentially A:
Answer: independently and sequentially
*Question*
Answer the following question given this paragraph: There are two types of endoplasmic reticulum. They are called rough endoplasmic reticulum (RER) and smooth endoplasmic reticulum (SER). Both types are shown in Figure below . Q: What are the two types of endoplasmic reticulum? Choices: - thick & smooth - rough & thin - rough & thick - rough & smooth A:
**Answer**
rough & smooth
Answer the following question given this paragraph: In seedless vascular plants such as ferns, the sporophyte releases spores from the undersides of leaves. Q: In seedless vascular plants such as ferns, the sporophyte releases spores from the undersides of what basic plant structures? Choices: - roots - fruits - stems - leaves A:
leaves