Answer:
NASA lands Perseverance rover on the Mars surface, carrying the first helicopter for another planet. NASA successfully landed its fifth robotic rover on Mars on Thursday, with the U.S. space agency confirming that Perseverance touched down safely on the red planet's surface.
Explanation:
The relationship between mass and acceleration is inversely proportional, so as one goes up the other goes down. In this case, acceleration would decrease since mass is increased
Answer:
35.1688 seconds
Explanation:
M = Mass of sphere = 8200 kg
R = Radius of sphere = 90 cm
F = Force = 30 N
Moment of inertia is given by
Torque is given by
For one rotation
The time taken to rotate the sphere from rest is 35.1688 seconds
Divide the long wire in small segments. The field due to one segment can be found from Biot- Savart law.
dB=(uo/4pi) Idlxr/r^3. In this expression if we take vector r perpendicular to current element , the cross product in the expression shows that the direction of B is perpendicular to vector r and from symmetry it can be said that field line is circular around the wire segment. This is true for all segment ,because in infinitely long wire all segments are equivalent . Thus, magnetic field lines are concentric around a long straight wire.
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