If only 25% of the carbon-14 remains, how old is the
material containing the carbon-14?

The discovery of the electron as a subatomic particle was a result of

The friction of the water on a boat produces an acceleration of -10. m/s2. if the boat is traveling at 30. m/s and the motor is shut off, how long it take the boat to slow down to 5.0 m/s?

With which of the following is the weak nuclear force associated? a.lightingb.nuclear decayc.ocean tidesd.stactic cling