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

The air in a 22 C room contains water at a partial pressure of 14 mm Hg. What is the relative humidity?

A 0.060 kg ball hits the ground with a speed of - 32 m/s. The ball is in contact with the ground for 45 milliseconds and the ground exerts a + 55 N force on the ball. What is the magnitude of the velocity after it hits the ground?

A standard frequency for tuning musical instruments is 440 Hz for the pitch of A, denoted A4. What is the length, in meters, of the steel rod that produces the pitch A4 as its fundamental longitudinal resonance?

Wo carbon atoms are joined by a spring-like carbon-carbon bond. the potential energy stored in the bond has the value you calculated in part a if the bond is stretched 0.050 nm. what is the bond's spring constant?

Predict whether the hottest part of a room will be near the ceiling, in the center, or near the floor, given that there is a hot-air vent near the floor.

How much would a 100kg man weigh on the surface of the sun where the acceleration is 274 m/s

How much current is in a circuit that includes a 9 - volt battery and a bulb with a resistance of 12 ohms?

Find the current Voltage VD and current ID in the following circuit assuming (a) ideal diode. (b) Constant voltage drop model with Von = 0.75V (c) using the exponential model (I_0=1*10^ (-14)). Verify your results through Multisim simulation

Suppose two stars are located in region a of the h-r diagram shown in the figure below. Star X appears much dimmer that Star Y as seen from Earth. Which Star can be inferred to be nearer to Earth, and how do you know?

A student examining a joint observes collagen-rich connective tissue fibers linking the bones, but finds no synovial cavity. Which structural classification fits the observed joint?