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The following is a nuclear reaction equation: 63Li+10n →31H +xyP Determine the values of x and y.
asked
Jun 21, 2021
in
Physics Form 4
by
anonymous
radioactivity
0
votes
1
answer
State two uses of radioactivity in medicine.
asked
Jun 21, 2021
in
Physics Form 4
by
anonymous
radioactivity
0
votes
1
answer
An object of height 10 cm is placed 30 cm from a converging lens of focal length 18 cm.
asked
Jun 21, 2021
in
Physics Form 2
by
anonymous
reflections
curved surfaces
0
votes
1
answer
An object is placed 8cm from a concave mirror whose radius of curvature is 20cm. Determine the position of the image.
asked
Jun 21, 2021
in
Physics Form 2
by
anonymous
reflections
curved surfaces
0
votes
1
answer
Carbon(II) oxide was passed over 4.1g of heated oxide of copper in a combustion tube until there was no further change. The mass of the final substance was found to be 3.29g
asked
Jun 21, 2021
in
Chemistry Form 3
by
anony mous
the mole
molar mass
properties of carbon monoxide
0
votes
1
answer
Describe how the focal length of a concave mirror can be determined using a screen and a metre rule.
asked
Jun 21, 2021
in
Physics Form 2
by
anonymous
reflections
curved surfaces
0
votes
1
answer
A consumer has the following appliances in the house:
asked
Jun 21, 2021
in
Physics Form 4
by
anonymous
electronics
0
votes
1
answer
State and explain the factors that are considered when collecting a gas by displacement of
asked
Jun 21, 2021
in
Chemistry Form 1
by
anony mous
composition of air
reaction
compostition of water
displacement
collection
0
votes
1
answer
An electric cooker is rated 2.5 kW, 250 V. State the meaning of these values
asked
Jun 21, 2021
in
Physics Form 4
by
anonymous
electronics
0
votes
1
answer
State two ways of minimising power losses during the transmission of electric power.
asked
Jun 21, 2021
in
Physics Form 1
by
anonymous
electrostatics
electronics
0
votes
1
answer
Figure 4 shows circular water waves incident on a plane reflector placed at an angle to the path of the waves.
asked
Jun 21, 2021
in
Physics Form 3
by
anonymous
waves
0
votes
1
answer
State the purpose of a fuse in an electrical circuit.
asked
Jun 21, 2021
in
Physics Form 1
by
anonymous
cells
electrostatics
0
votes
1
answer
Study the setup in the Figure below and then answer the questions that follow.
asked
Jun 21, 2021
in
Chemistry Form 2
by
anony mous
carbon
preparation and properties of carbon (iv) oxide
reactions
0
votes
1
answer
Explain how x-rays are produced in the x-ray tube.
asked
Jun 21, 2021
in
Physics Form 4
by
anonymous
x rays
0
votes
1
answer
A broadcasting station produces radio waves of wavelength 800 m. Determine their frequency (speed of air is 3 x 108ms-1
asked
Jun 21, 2021
in
Physics Form 2
by
anonymous
waves
0
votes
1
answer
Draw a diagram to show a p-n junction connected in the reverse bias mode.
asked
Jun 21, 2021
in
Physics Form 4
by
anonymous
electronics
0
votes
1
answer
Element A has mass number 40 and 21 neutrons
asked
Jun 21, 2021
in
Chemistry Form 2
by
anony mous
structure of the atom
periodic table
electron arrangement
formula
0
votes
1
answer
When iron filings are sprinkled onto a bar magnet, it is observed that there are more iron filings at the ends than in the middle. Explain this observation.
asked
Jun 21, 2021
in
Physics Form 2
by
anonymous
magnetism
0
votes
1
answer
Figure 3 shows an annular ring.
asked
Jun 21, 2021
in
Physics Form 1
by
anonymous
electrostatics
0
votes
1
answer
Figures 2(a) and 2(b) show two circuit diagrams with identical lamps and identical cells
asked
Jun 21, 2021
in
Physics Form 1
by
anonymous
cells
simple circuits
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