The method of age determination called "radioactive uranium dating" cannot be used to determine the age of
1). rocks
2). fossils and plant bodies?
3). the earth
4). ?minerals on earth?
1. In order to make an electromagnet you need a
4. A boy is swinging a ball attached to a string in a horizontal circle. If the string snaps
5. If the length of a simple pendulum is halved then its period of oscillation is
6. The property of metal by which it can be drawn into wires is called _____________.
7. the sound having a frequency of 20 hertz to 20000 hertz are known as
8. Which of the following have the same unit ?