Figure 3 shows two identical hollow spheres. Sphere A is completely filled with the
liquid while B is partially filled with identical liquid.

When the two spheres are rolled gently on a horizontal surface, it is observed that the sphere B stops earlier than the sphere A. Explain this observation.

Answer:

- There is friction between the water and sphere surfaces in B, which resist
motion. As B moves forward the water in it moves backward.

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The control grids in a Cathode Ray Oscilloscope (CRO) is used to control the brightness of the beam on the screen. How is this achieved? (Answered)
The control grids in a Cathode Ray Oscilloscope (CRO) is used to control the brightness of the beam on the screen. How is this achieved? .
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State two differences between the cathode ray tube (CRT) of a T.V and the cathode ray oscilloscope (CRO). (Answered)
State two differences between the cathode ray tube (CRT) of a T.V and the cathode ray oscilloscope (CRO). .
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Figure 3 shows the main features of a cathode ray tube (CRT) of a cathode ray oscilloscope (CRO). (i) Describe how the electrons are produced in the tube. (ii) State and explain the function of the grid. (iii) State what would be observed on the screen if an a.c voltage is connected across the y-plates. (iv) State how the deflection system of a television differs from that of a CRO. (Answered)
Figure 3 shows the main features of a cathode ray tube (CRT) of a cathode ray oscilloscope (CRO). (i) Describe how the electrons are produced in the tube. (ii) State and explain the function of the grid. (iii) State what would be observed on the screen if an a.c voltage is connected across the y-plates. (iv) State how the deflection system of a television differs from that of a CRO. .
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Figure 14 (a) is a diagram of a cathode ray tube. M and N are parallel vertical plates (a) When switch S is open, a spot is seen at the centre of the screen as shown in figure 14(b). (i) State what happens to the sport when S is closed. (ii) State what would happen to the spot if the potential difference across MN is increased. (iii) State what would be seen on the screen if the battery is replace (Answered)
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A car of mass 800kg starts from rest and accelerates at 1.2 #ms^-2#. Determine its momentum after it has moved 400m from the starting point (Answered)
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Figure 12 shows a lorry towing a trailer using a rope. The lorry exerts a force N on the trailer and the trailer exerts an equal but opposite force M on the lorry. The frictional force between the trailer and the road is F. Explain how the forces N, M and F enable the trailer to move. .
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Figure 13 shows a frictionless trolley of mass 2kg moving with uniform velocity towards a wall. At the front of the trolley is a spring whose spring constant is 25 Nm-1. The trolley comes to rest momentarily after compressing the spring by 3cm and the rebounds from the wall. (i) Determine: (I) The force exerted on the wall by the spring. (II) The maximum acceleration of the as it rebounds from the (Answered)
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Figure 3 shows two identical hollow spheres. Sphere A is completely filled with the liquid while B is partially filled with identical liquid. When the two spheres are rolled gently on a horizontal surface, it is observed that the sphere B stops earlier than the sphere A. Explain this observation.

Figure 3 shows two identical hollow spheres. Sphere A is completely filled with the
liquid while B is partially filled with identical liquid.

When the two spheres are rolled gently on a horizontal surface, it is observed that the sphere B stops earlier than the sphere A. Explain this observation.