Mendeleev noticed that if he organized the elements by atomic weight certain patterns emerged. for instance, elements in the same group (family) appeared to have the same

What force is directly related to number of electrons?

Conventional current is the rate at which positive charge flows in a circuit. In atoms, only the electrons are free to move. What can you conclude from these statements? A) Electrons must be positively charged.

An egg drops from a nest at a height of 2.3 m. Which equation can you use to calculate the impact speed of the egg?

All reactions require activation energy. a. True b. False

Energi potensial pegas saat x = 0,02 meter adalah A. 0,1 B. 0,2 C. 0,3 D. 0,4 E. 0,5

Why do responsible consumers use credit and credit cards?

According to Ptolemy's model of the movement of celestial bodies, A. the sun is the center of the universe. B. the earth rotates around the moon. C. planets orbit in circular paths around the earth. D. the earth rotates around the sun.

What is an organ that has villi to absorb the nutrients

Assume you are a Medieval knight attacking a castle with a cannon. The ball leaves the cannon with a speed of 47.7 m/s. The barrel's angle with respect to the ground is 43.

0.005 kg of copper was heated from 20°C to 80°C. How much energy was used to eat Cu? (Specific heat capacity of Cu is 385 J/kg °C)