A person is placed in a large, hollow, metallic sphere that is insulated from ground. (a) If a large charge is placed on the sph
ere, will the person be harmed upon touching the inside of the sphere? Yes No Correct: Your answer is correct. (b) Explain what will happen if the person also has an initial charge whose sign is opposite that of the charge on the sphere.
It is given that the sphere is insulated from ground and a large charge is placed on the sphere. The charge on the hollow sphere will always remain on the outer surface of the sphere and there will be no charge on the inner surface of the sphere.
If a person touches the inner surface of the sphere then he will not be harmed as there is no charge on the inner surface of the sphere.
If a person carries the charge of the opposite sign of the same magnitude then the sphere and person get neutralized upon touching the sphere.
If a person does not touches the sphere then the charge on the outer surface will be zero and there will be a positive charge on the inner surface of the sphere
Observations are used in order to collect data and record a variety of interesting or useful key points about the subject or specimen in observation. These observations, if made well, can be recorded and used to supplement a hypothesis.
The key is in "they lock together". This tells you this is a complete inelastic collision and therefore you can use the formula: m1*v1+m2*v2=v(m1+m2) Plug in numbers: 2000*3+2000*2=v(2000+2000) so v=2 m/s, obviously in the same direction of motion in which they were both moving.
