Physics Answers

If A= 5i + 3j

B= 3i + 7j

C= 2i - 3j

Find A × B × C

when a object of mass 50kg is move from one place to another with an acceleration of 10=5^2 find the force use in moving that object from one place to another

The young modulus of a material of total extension 1.2m if the sites produced on performing SHM is 20N/M^2 of 4m of diameter length the wire lenght of the sites is, 6.5m if a mass of50kg is suspended on that wire to causes it to osclillate what is the period of oscillation and the angular frequency

Half the volume of the block immersed in water.what is the reading of the spring balance?(Density of water=1.0gcm^-3)

Light scattered from blue sky is strongly polarized because of the nature of the scattering

process described in Section 33.6. But light scattered from white clouds is usually not polarized.

Why not?

a. the temperature of 200g of water increases from 20 ⁰C to 50 ⁰C in 10 minutes. Calculate:

i. the amount of heat gained by the water

ii. the average rate at which the water is gaining heat

(specific heat capacity of water = 4200 J kg^{-1 0}C^-1)

b. Determine the amount of heat that must be removed from 1 kg of water at 40 ⁰C to convert it to ice at -5 ⁰C.

(Obtain any relevant data that you need from the internet. Cite the source of that data in your answer)

A rock is thrown off the cliff horizontally with the speed of v = 12 m/s. The cliff is h=47 meter high. Find the speed of the rock once it hits the water in m/s. Give your answer with one decimal place.

A stone is thrown from a point A with speed 27 m/s at an angle of 26 degree below the horizontal. The point A is 25 m above the horizontal ground. Find the horizontal range of the stone in meter. Give your answer with one decimal place.

A fan blades start from rest and move with a constant angular acceleration and reaches an angular speed of 14.0rad/s.find (a) the magnitude of the angular acceleration of the wheel

(B) the angle (in radians) through which it rotates in this time.

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