How many electrons are in the outer energy level of group 17 (7A) atoms?

Can laws in science change

Many particles, such as dust, are inhaled when people breathe. Which part of the respiratory system filters out the majority of these particles? A. Nose B. Alveoli C. Trachea D. Diaphragm

Uncharged Particle A. Neutrons B. Protons C. Electrons D. Molecule

A laser beam is incident on two slits with a separation of 0.215 mm, and a screen is placed 5.45 m from the slits. an interference pattern appears on the screen. if the angle from the center fringe to the first bright fringe to the side is 0.

If the wavelength of an electromagnetic wave is longer, what is true about the energy

Electromagnetic waves with low frequencies have been used for long-distance underwater communication. These waves most likely belong to which of the following parts of the electromagnetic spectrum? A. gamma rays B. infrared waves C. radio waves D.

A bird sitting high in a tree is an example of an object with what type of energy

The height a ball bounces is less than the height of the previous bounce due to friction. The heights of the bounces form a geometric sequence. Suppose a ball is dropped from one meter and rebounds 95 % of the height of the previous bounce.

Five-gram samples of copper and aluminum are at room temperature. Both receive equal amounts of energy due to heat flow. The specific heat capacity of copper is 0.09 cal/g°C, and the specific heat capacity of aluminum is 0.22 cal/g°C.

A bullet travels at 870 m/s. How long will it take a bullets to go 1 m?