As you move from left to right across a period the number of valances electrons

A. increases

B. stays the same

C. increase and then decreases

D. decreases

11-8 Consider a heavy car submerged in water in a lake with a flat bottom. The driver's side door of the car is 1.1 m high and 0.9 m wide, and the top edge of the door is 10 m below the water surface.

Mercury has a mass of 3.3 e 23 kg and a radius of 2.44 e 6 m. Find Mercury's gravitational field strength. Show your work (formula, rearrangement, work, answer, unit, sig dig) (4) 12. Venus has a mass of 4.87 e 24 kg and a radius of 6.05 e 6 m.

When a parachute opens, the air exerts a large drag force on it. This upward force is initially greater than the weight of the sky diver and, thus, slows him down.

In the compound AgNO3, the numeral 3 is called a (n) subscript superscript oxidation number coefficient

A heat engine with a high-temperature reservoir at 400 k has an efficiency of 0.20. what is the maximum possible temperature of the cold reservoir?

How can the time period of a pendulum be decreased or increased

A space probe is sent to the vicinity of the star Capella, which is 42.2 light-years from the earth. (A light-year is the distance light travels in a year.) The probe travels with a speed of 0.9930c.

ngrid kicks a football with an initial velocity of 12 m/s at an angle of 45° relative to the ground. The horizontal component of the initial velocity to the nearest tenth is m/s.

A 60-watt light bulb has a voltage of 120 volts applied across it and a current of 0.5 amperes flows through the bulb. What is the resistance of the light bulb?

In a laboratory experiment, a diffraction grating produces an interference pattern on a screen. If the number of slits in (including the slit spacing) the same, then The fringes stay the same brightness and get closer together.