GuideFoot - Learn Together, Grow Smarter. Logo

In Biology / College | 2025-07-04

An electric device delivers a current of [tex]$15.0 A$[/tex] for 30 seconds. How many electrons flow through it?

Asked by kshelia35

Answer (2)

A device delivering a current of 15.0 A for 30 seconds allows approximately 2.81 × 10^{21} electrons to flow through it. This is calculated using the charge formula Q = I × t and the electron charge. Therefore, the total charge is divided by the charge of an electron to find the number of electrons.
;

Answered by Anonymous | 2025-07-04

A biodiversity hotspot must have at least 1,500 species of vascular plants as endemics and have lost at least 70% of its original habitat. These criteria highlight the areas of rich biodiversity under significant threat. Protecting these hotspots is essential for conservation efforts. ;

Answered by GinnyAnswer | 2025-07-04

Related Questions in Biology

📝 Answered - A) Constitutive Perhaps 60-80% of genes are not regulated, but are C) Degenerative D) Repressed B) Continuous

📝 Answered - Which statement about the scientific method is true? A. The scientific method involves developing and testing conclusions. B. The scientific method is a linear approach to accumulating scientific knowledge. C. The scientific method is used in different ways by different scientists. D. The scientific method involves developing a question to answer a hypothesis.

📝 Answered - What characteristic of skeletal muscle fibers allows them to contract and move bones? A) The presence of thick and thin myofilaments organized into sarcomeres. B) The fibrous epimysium surrounding the fibers. C) The rich supply of blood vessels in skeletal muscle. D) The multinucleated structure of the fibers.

📝 Answered - Through which conversion is energy released? A. ADP to ATP B. ATP to ADP C. NADP${}^{+}$ to NADPH D. $CO _2$ and $H _2 O$ to $C _6 H _{12} O _6$ and $O _2$

📝 Answered - The regulation of the lactose operon depends on the level of which of the following substances in the medium? A) DNA polymerase B) RNA polymerase C) Lactose D) Glucose E) C & D