A very long straight wire carrying 2.0 A lies along the x-axis. A second very long parallel wire carrying 3.0 A in the same direction is positioned parallel to the x-axis and passes through the point (0, 1.0 m)
What is the magnitude of the magnetic field at the point (0, 0, 1.0 m)?
8.2 × 10-7 T
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Which of the following correctly states the number of comets that scientists estimate to be located in the Oort cloud and the number that have actually been observed in the Oort cloud (with telescopes)?
A) estimated number in Oort cloud: 1 trillion observed in Oort cloud: zero B) estimated number in Oort cloud: 1 million observed in Oort cloud: 1,000 C) estimated number in Oort cloud: 100,000 observed in Oort cloud: 50 D) estimated number in Oort cloud: 1 billion observed in Oort cloud: 10,000
The term age of reptiles is sometimes used to refer to the ______________ era
Fill in the blank(s) with correct word
Ordinary matter is made from what generation quarks?
A. 1st B. 2nd C. 3rd D. 1st and 2nd E. 1st, 2nd, and 3rd
Why do we have two high tides per day?
A. About half of Earth's water must flow past more geological barriers, slowing it down. B. The Moon and the Sun create separate tidal bulges, resulting in two high tides per day. C. There are two tidal bulges, and the rotation of Earth carries us through both of them every day. D. The rotation of Earth and the motion of the Moon around Earth drag both tidal bulges over us.