Which mode of transportation is best for ensuring fastest delivery?

Question

Which mode of transportation is best for ensuring fastest delivery?

A. road

B. rail

C. maritime

D. air

Answer 1

How does combustion occur in a gas engine of a car?

A. Carbon dioxide and gasoline are compressed in the engine, and a spark plug ignites the fuel.

B. Oxygen and gasoline are compressed in the engine, and a spark plug ignites the fuel.

C. Carbon dioxide and gasoline are compressed in the engine, and the fuel spontaneously ignites.

D. Oxygen and gasoline are compressed in the engine, and the fuel spontaneously ignites.

Answer 2

B. Oxygen and gasoline are compressed in the engine, and a spark plug ignites the fuel.

Answer 3

The gas pedal belongs to which subsystem of an automobile?

A. control

B. suspension

C. transmission

D. guidance

Answer 4

A. control

Answer 5

Why are metals used within most electronic devices and wires? In three to five sentences, apply your knowledge of conductivity to explain.

Answer 6

Metals are commonly used in electronic devices and wires because they are excellent conductors of electricity. This means they allow electric current to flow through them with minimal resistance. The free electrons in the metallic structure can easily move in response to an electric field, carrying the charge along. This property of high electrical conductivity makes metals ideal for transmitting electrical signals efficiently and effectively within electronic circuits and devices. Additionally, metals are also malleable and ductile, allowing them to be easily shaped into different forms and configurations, making them versatile for various applications in electronics.