What is the half life of a radioactive isotope that decreased to one-fourth its original amount in 100 year

An alarm clock is set to ring for a total of 1.00 minute It is placed on a spaceship moving at 0.6 c According to Mission Control on Earth, the alarm clock rings for: A) 0.60 min B) 0.64 min C) 0.80 min D) 1.00 min E) 1.25 min

A harmonic wave is traveling along a rope. The oscillator that generates the wave completes 42.0 vibrations in 20.8 s. A given crest of the wave travels 371 cm along the rope in a time period of 11.6 s. What is the wavelength? Answer in units of m.

A piston above liquid in a closed container has an area of 1m2. The piston carries a load of 350 kg. What will be the external pressure on the upper surface of the liquid in KPA

In objects motion will not change is the force is acting on the object are blank

What drives a nail into wood

The acceleration due to gravity is

How does gravitational force and electric force compare?

There are two types of addiction, psychological and physical. A. True B. False

What two gases probably dominated precambrian earth's atmosphere?

a fast ball travels at about 161kilometers/hr if this fast ball could keep its speed how long would it take this ball to travel 0.15 terameters?