Earthworms are sold to gardeners to help improve the movement of air and water through soil.
Answer the following statement true (T) or false (F)
True
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Scientists have been able to ____ plants using the technique called tissue culture
A) feed B) water C) clone D) revive
Who invented the steam engine in 1712 for use as a water pump in mines?
a. Thomas Newcomen b. James Watt c. Richard Arkwright d. Samuel Crompton
Two technicians are discussing dual-stage airbags. Technician A says that a deployed airbag is safe to handle regardless of which stage caused the deployment of the airbag. Technician B says that both stages ignite, but at different speeds depending on the speed of the vehicle. Who is right?
A) Technician A only B) Technician B only C) Both technicians D) Neither technician
When a 555 timer is operated in the astable mode, the output will be a ____.
A. single pulse B. spike C. stream of pulses D. steady 5 V DC