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Questions and answers by visitors named sdjkbnf

Questions (23)

A boat of mass 7000kg is floating without moving, close to a pier. It is not tied up. A woman of mass 70kg is standing on the
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2. 126 views
A metal carbonate is thermally decomposed. Will the product be heavier or lighter?
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2. 47 views
does the mass change after thermal decomposition?
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2. 53 views
The mass at the beginning and end of a chemical reaction is the same in a closed system because...1. atoms can escape and be
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2. 75 views
Simplify2/9:9/2
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2. 44 views
Write this ratio in its simplest form:2/9:9/2
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2. 60 views
What was the name of the first all-black British rock band formed in the late 1960s?
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2. 71 views
Which of the following reactions is endothermic?1. Burning coal. 2. Magnesium reacting with hydrochloric acid. 3. Thermal
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2. 76 views
What is meander migration?
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2. 79 views
How would we describe the structure of a piece of music?
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2. 133 views
What are polyrhythms?1. When you have multiple rhythms worth the same number of beats played at the same time. 2. When you have
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2. 86 views
How would we describe the structure of a piece of music?1. The order that different parts of the song are played in. 2. How the
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2. 70 views
What is the main sign that a chemical reaction has occurred during an explosion?1. Change in temperature 2. Precipitation 3.
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2. 80 views
To produce sodium sulfate by the reaction illustrated you need ...?1. sodium chloride + sulfuric acid 2. potassium sulfate +
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2. 128 views
To produce sodium sulfate by the reacting a dilute alkali with a dilute acid you need ...?1. sodium chloride + sulfuric acid 2.
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2. 118 views
How can you tell that a metal is reacting with water?1. Bright light 2. It gets colder 3. Fizzing 4. Colour change
1. 3 answers
2. 84 views
Bases are commonly:1. Alkalis 2. Metal oxides 3. Acids
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2. 101 views
Bases are commonly?1. Alkalis 2. Metal oxides 3. Acids
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2. 98 views
a salt is a...
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2. 72 views
How many molecules of water does it take to make one molecule of glucose in the photosynthesis balanced equation?1. 12 2. 10 3.
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2. 98 views
Reducing the amount of colours in the image will...a) Reduce the amount of binary needed for each pixel b) Reduce the quality of
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2. 105 views
which is NOT an effect of increasing the resolution in an image?a) more binary will be required to create the image b) higher
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2. 83 views
if you increase the colour depth does the amount of pixels in an image stay the same?
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2. 63 views