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the sum of two unit vector is also a unit vector.then magnitude of their different is..

1) 0. 2) root 2. 3) root 3. 4) root 7

1) 0. 2) root 2. 3) root 3. 4) root 7

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a boy and his father run together.mass of the boy is half of his father ; kinetic energy of father is half of his son.if the father increases his velocity 1 m/s , then the kinetic energy becomes equal of each . what is their initial velocity?

if they run with their own kinetic energy on a road which is inclined and the road makes an angle of 30 degree with horizontal, how much distance will each of them complete ?

if they run with their own kinetic energy on a road which is inclined and the road makes an angle of 30 degree with horizontal, how much distance will each of them complete ?

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Initially a mass m is held such that spring is in relax conditions.if mass is suddenly released, maximum elongation in spring will be..

1) mg/k. 2) 2mg/k. 3) mg/2k. 4) mg/4k

1) mg/k. 2) 2mg/k. 3) mg/2k. 4) mg/4k

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why we feel comfortable after running the air conditioner? explain with the theory of humidity of air in physics

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1. A uniform electric field of 200 N/C is in the x-direction. A point charge of 3μC is released from rest at the origin. What is the kinetic energy of the charge when it is at x = 4 m?

a. 2.4×10 −2 J

b. 1.6×10 −2 J

c. 3.6×10 −2 J

d. 4.8×10−2J

2, Two large horizontal metal plates are separated by 4 mm. The lower plate is at a potential of

−6V

. What potential should be applied to the upper plate to create electric field strength of 4000 V/m upwards in the space between the plates?

a. +22V

b. +10V

c. −10V

−22V

3. An ac circuit consists of a voltage source v=200sin120πt and a 6μF capacitor in series. Calculate the current established in the circuit

a. 0.32A

b. 1.24A

c. 0.64A

d. 2.13A

4. Gauss’s law says that the net flux passing through a Gaussian sphere is equal to the charge enclosed divided by?

a.1

b. 1/ε 0

c. 0

d. ε 0

a. 2.4×10 −2 J

b. 1.6×10 −2 J

c. 3.6×10 −2 J

d. 4.8×10−2J

2, Two large horizontal metal plates are separated by 4 mm. The lower plate is at a potential of

−6V

. What potential should be applied to the upper plate to create electric field strength of 4000 V/m upwards in the space between the plates?

a. +22V

b. +10V

c. −10V

−22V

3. An ac circuit consists of a voltage source v=200sin120πt and a 6μF capacitor in series. Calculate the current established in the circuit

a. 0.32A

b. 1.24A

c. 0.64A

d. 2.13A

4. Gauss’s law says that the net flux passing through a Gaussian sphere is equal to the charge enclosed divided by?

a.1

b. 1/ε 0

c. 0

d. ε 0

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what are dark matters and dark energy?

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How is energy convertable in matter?Please site examples.

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What is the pathway of origin of matter in universe?What are bosons and kindly tell the significance of Higg's boson.

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A massless rope is stretched horizontally between two supports that are 3.0 m apart.

When an object of weight 3200 N is hung at the center of the rope, the rope is observed

to sag by 50 cm. Calculate the tension in the rope.

When an object of weight 3200 N is hung at the center of the rope, the rope is observed

to sag by 50 cm. Calculate the tension in the rope.

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A He-Ne laser emits a beam of diameter 2×10−3m and wavelength 630 nm. It is directed

towards an aeroplane flying at a height of 11 km. Calculate the diameter of the light patch

produced on the surface of the aeroplane

towards an aeroplane flying at a height of 11 km. Calculate the diameter of the light patch

produced on the surface of the aeroplane

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