Answer:
The ampere, symbol A, is the SI unit of electric current. It is defined by taking the fixed numerical value of the elementary charge e to be 1.602 176 634 x 10-19 when expressed in the unit C, which is equal to A s, where the second is defined in terms of ΔνCs.
the device used to measure current in a circuit is ammeter
Answer:
Pressure,
Explanation:
It is given that,
Combined mass of the man and the chair, m = 95 kg
Radius of the leg of chair, r = 0.5 cm = 0.005 m
A large man sits on a four-legged chair with his feet off the floor. The force acting per unit area is called the pressure exerted.
Area of 4 legs, A = 4 A
So, the pressure each leg exert on the floor is . Hence, this is the required solution.
Answer:
The center of the Milky Way most likely contains a supermassive black hole.
Explanation:
Because it is an eleptical galaxy, it has a little rotation to it but not enough to flatten out so the center will contain a supermassive black hole.
Answer:
Explanation:
In Ptolemy's geocentric model of the universe, the Sun, the Moon, and each planet orbit a stationary Earth. He had them in circle orbits.
Galileo's model showed that the sun was the centre of the universe. That everything orbited around the earth. He also saw that they we in elliptical orbits.
Galileo proved Ptolemy wrong because Ptolemy said that everything orbited the earth and they orbited in circle but they orbit in ovals (elliptical) and that they orbit the sun.