How many electrons does an aluminum atom have

Consider a sphere, an infinitely long cylinder, and a plane of infinite length and width (a, b and c below). Imagine that you can hover above each one in your own personal helicopter.

In order for organisms to stay alive and continue their species, they must overcome many challenges. Which of these is NOT one of the three challenges of life? Question 1 options: getting energy reproducing regenerating staying healthy

Why does a plane move even when the wind is pushing against it?

A membrane potential that starts at - 70 mV and goes to - 20 mV would be: A. Depolarized B. Repolarized C. Hyperpolarized D. Superpolarized

A ball with an initial velocity of 8.00 m/s rolls up a hill without slipping. treating the ball as a spherical shell, calculate the vertical height it reaches.

You measure a watch's hour and minute hands to be 7.4 mm and 12.1 mm long, respectively. Part A In one day, by how much does the distance traveled by the tip of the minute hand exceed the distance traveled by the tip of the hour hand?

Describe the possible long term impact of a catastrophic event

Calculate the mass defect of the helium nucleus 42He. The mass of neutral 42He is given by MHe=4.002603u.

A transparent film laminated to a fabric is identified in the study material as a. stretch fabric. b. PVC. c. a skin. d. two-faced fabric

Technician A says that all friction and steel plates in a clutch pack should be replaced during and overhaul. Technician B says that the automatic transmission fluid cooler should always be flushed when a unit is rebuilt or replaced.