Convert i) 1 microgram into kilogramii) 100 decameter into cm
2 answers:
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Answer:
A.The positive z-direction
Explanation:
We are given that
Linear charge density of long line which is located on the x-axis=
Linear charge density of another long line which is located on the y-axis=
We have to find the direction of electric field at z=a on the positive z-axis if and
are positive.
The direction of electric field at z=a on the positive z-axis is positive z-direction .
Because and
are positive and the electric field is applied away from the positive charge.
Hence, option A is true.
A.The positive z-direction
When an opaque obstacle is placed between a source of light and a screen, a shadow of the obstacle is formed on the screen. The kind of shadow depends on the size of the source of light. In other words, the earth casts its shadow on the moon. The solar eclipse occurs when the moon comes between the sun and the earth.
Answer:
Given:
Mass (m) = 3.0 kg
Uniform speed (v) = 20 m/s
Length of string (r) = 40 cm = 0.4 m
To Find:
Tension in the string (T)
Explanation:
Tension (T) is the string will be equal to centripetal force ().
Substituting value of m, v & r in the equation:
Tension in the string (T) = 3 kN