For what value of x, is the graph of f(x)=x(x-7)(x+30) be above the x axis.
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We have an angle of 3 degrees.How big will it look through a glass that magnifies things four times.
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A helicopter starts to go up with an acceleration of 3m/s². After time t₁ engine is shut off. After time t₂=30 sec the person on the ground doesn't hear any sound. If the speed of sound in air is 320 m/s.What was the velocity of helicopter when the engine was shut off?
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Recently I attended a small get-together.I counted the number of handshakes that were exchanged.They were 45 altogether.How many guest were present?
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PHYSICS:
Two bodies move in a straight line towards each other with initial velocities v₁ and v₂. The acceleration for both these particles are directed in opposite directions to the velocities and are a₁ and a₂ respectively. What should be the maximum distance between these two particles so that the meet?
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PHYSICS

The diagram shows a set of equipotential surfaces.At point P, what is the direction of the electric field?

1. left
2. right
3. up the page
4. down the page
5. Either left or right, exact direction cannot be determined