How many electrons should be in an atom's valence shell (with the exception of hydrogen and helium) to become stable?

10. A 5.0 g pellet is placed in the barrel of a toy gun and is propelled by a spring of force constant 50. N/m. The spring is compressed 20. cm and then released. Calculate the maximum velocity of the pellet when shot horizontally.

En Argentina en que deportes se realizan controles de doping

In a football game, a receiver is standing still, having just caught a pass. Before he can move, a tackler, running at a velocity of + 4.1 m/s, grabs him. The tackler holds onto the receiver, and the two move off together with a velocity of 2.1m/s.

A star has a mass of 1.36 x 1030 kg and is moving in a circular orbit about the center of its galaxy. the radius of the orbit is 2.1 x 104 light-years (1 light-year = 9.5 x 1015 m), and the angular speed of the star is 1.1 x 10-15 rad/s.

A girl delivering newspapers travels 4 blocks west, 5 blocks north, then 6 blocks east. what is the magnitude of her resultant displacement? answe

Water has a specific heat of 4.186 J/g°C, and ethanol has a specific heat of 2.450 J/g°C. Based on this information, which best compares water and ethanol? It requires more heat to raise the temperature of a gram of ethanol by 1°C.

Try it A volleyball player's hand applies a 39 N force while in contact with a volleyball for 2 seconds. What is the impulse on the ball?

Muscular strength is defined as:

Which piece of playground equipment could be used to model and explain the movement of matter in the biosphere

A 4-kg ball has a momentum of 12 kg∙m/s. what is the ball's speed?