HURRY UP Starting with 100 grams of uranium-238, after one half life has gone by, how many grams of uranium-238 will remain?

Group of answer choices

50 g

100 g

12.5 g

25 g

Radiant heat makes it impossible to stand close to a hot lava flow. Calculate the rate of heat loss by radiation from 1.00 m^2 of 1190°C fresh lava into 30.0°C surroundings, assuming lava's emissivity is 1.

If a machine has 100% efficiency, it means that A. output work is equal to input work. B. output force is equal to input force. C. output work is twice the input work. D. output force is twice the input force.

Why do you keep moving forward when you slam on the brakes of your bike?

Compare and Contrast Alpha, Beta, and Gamma Rays according to their charge, mass and structure.

Which group on the periodic table contains elements that do not normally form chemical bonds

Which statement describes the formation of a nebula? A. An elliptical flattened disk begins. B. A bulging core with irregular stars around it forms. C. A large flattened core at the center contracts. D. Gases from a dead star gather and contract.

What are 4 things that can happen to a light wave when it hits an object?

Which of the following is NOT a strategy to prevent falls? a. keeping walking surfaces free from moisture and clutter b. replacing damaged electrical cords c. installing handrails for stairs d. keeping a ladder handy for reaching high places

What are a few things that could not be used as evidence?

Examples were friction is not useful