Miracle Learning Centre Physics Tuition Question on Electromagnetism. (O Level Science Tuition/IP Science Tuition/Secondary Science Tuition)

Fig. 10.1 shows a metal rod AB placed on two smooth horizontal rails that are fixed in position. The magnetic field is directed perpendicularly into the plane of the paper.

(a) Describe and explain what happens to the rod AB when switch S is closed.

(b) State the effect on the movement of rod AB (if any) when

(i) the current is increased; [1]

(ii) the separation between the rails is decreased. [1]

(c) Suggest one way of reversing the movement of the rod AB. [1]

Miracle Learning Centre Answer to Science Tuition Question on Electromagnetism. (O Level Science Tuition/IP Science Tuition/Secondary Science Tuition) 10 (a) AB will move to the right. [A1] A current carrying wire will experience a force when it is placed in a magnetic field. [A1] (b)(i) It will move faster. [A1] (ii) It will move slower. [A1] (c) Reverse the direction of the current / magnetic field [A1]

Miracle Learning Centre Science Tuition Question (S4 Chem) (O Level Science Tuition/IP Science Tuition/Secondary Science Tuition)

(a) A student was asked to investigate the rate of reaction of magnesium with dilute hydrochloric acid. In the experiment, he used a clean piece of magnesium ribbon 5 cm long with 20.0 cm3 of 0.500 mol/dm3 dilute hydrochloric acid (in excess).

(i) Why is it essential to clean the magnesium ribbon? [1]

(ii) Write a balanced chemical equation for the reaction. [1]

(b) He measured the volume of hydrogen produced at r.t.p. at regular intervals. The results are shown in the graph above.

(i) State the volume of hydrogen gas produced when the reaction is complete. [1]

(ii) Hence, calculate the volume of 0.500 mol/dm3 dilute hydrochloric acid needed to react completely with the 5 cm long ribbon. [2]

(c) Copy the given graph into the writing paper. Then sketch on the same axes, the graphs you would expect if the experiment was repeated, making the following single changes in each case :

(i) Using half the length of cleaned magnesium ribbon. Label this graph A.

(ii) Using a cleaned magnesium ribbon 5 cm long but cut into very small pieces. Label this graph B.

(iii) Using dilute hydrochloric acid of concentration 0.250 mol/dm3. Label this graph C.

(d) Use the particles collision theory to explain your answer to c(iii).

Miracle Learning Centre Answer to Science Tuition Question (S4 Chem) (O Level Science Tuition/IP Science Tuition/Secondary Science Tuition)

B1(a)(i) 2m Cleaning to remove the magnesium oxide layer from the magnesium ribbon. [1]

(ii) The chemical equation is : Mg + 2HCl  MgCl2 + H2 [1]

(b)(i) 3m From the graph, the volume of hydrogen produce is 55cm3. [1]

(ii) Step 1 : Moles of hydrogen = volume/24dm3 = 0.06dm3/24dm3 = 0.0025 moles [1] Step 2 : Moles Ratio 2HCl : H2 2 : 1 y : 0.0025 y = moles of hydrochloric acid = 0.00125 [1] Step 3 : Volume of hydrochloric acid = moles/moles concentration = 0.00125/0.5 mol/dm3 = 0.0025 dm3 [1]

(c)(i), (ii), (iii) 3

(d) 2m - Since the hydrochloric acid concentration is smaller [1], there are fewer hydrogen ions per unit volume of the acid to collide with the magnesium, causing lesser frequency of ‘effective’ collision and decrease the rate of reaction. [1]

Learn from our Science Tuition Questions and Answers. Miracle Learning Centre Call 6463 8756 or sms 8128 8342/9839 9908. (Specialist in Science and Maths) for Primary, Secondary and JC levels. Miracle Learning Centre specialises in Science tuition, Maths tuition, Chemistry tuition and Physics tuition classes.

Miracle Learning Centre Primary Maths Tuition Question on Model Drawing. (PSLE Maths Tuition)

1. School A has as many pupils as School B. School B has as many pupils as School C. If School A has 2234 pupils, how many pupils does School C have?
Miracle Learning Centre Answer to Primary Maths Tuition Question on Model Drawing. (PSLE Maths Tuition)

= 1117 1117 X 5 = 5585 School C has 5585 pupils.
Learn from our Primary Maths Tuition Questions and Answers. Miracle Learning Centre Call 6463 8756 or sms 8128 8342/9839 9908. (Specialist in Science and Maths) for Primary, Secondary and JC levels. Miracle Learning Centre specialises in Maths tuition, Science tuition, Chemistry tuition and Physics tuition classes.

Miracle Learning Centre Primary Maths Tuition Question on Model Drawing. (PSLE Maths Tuition)

1. Faiz, Gary and Subra shared a total of $ 100. Faiz received $ 8 more than Gary. Subra received twice as much as Faiz. How much money did Gary receive ? (Draw a model to help you)
Miracle Learning Centre Answer to Primary Maths Tuition Question on Model Drawing. (PSLE Maths Tuition)
Method 1 4 units ------- $ 100 + $ 8 = $ 108 1 unit ------- $ 108 ÷ 4 = $ 27 27 – 8 = $ 19
Method 2 4 units ------ $ 100 - $ 8 - $8 - $8 = $ 76 1unit ------ $ 76 ÷ 4 = $ 19
Learn from our Primary Maths Tuition Questions and Answers. Miracle Learning Centre Call 6463 8756 or sms 8128 8342/9839 9908. (Specialist in Science and Maths) for Primary, Secondary and JC levels. Miracle Learning Centre specialises in Maths tuition, Science tuition, Chemistry tuition and Physics tuition classes.

Miracle Learning Centre Primary Maths Tuition Question on Fraction. (PSLE Maths Tuition)

1. When litres of water was poured into a container, it was full. What is the capacity of the container?

2. In a school concert, the number of boys is the number of girls. How many more girls than boys are there if there are 630 pupils at the concert?

Miracle Learning Centre Answer to Primary Maths Tuition Question on Fraction. (PSLE Maths Tuition)

1.  l  l  2 = l  l x 3 = 1 litres or 1.3125 litres 2. 9 units  630 1 unit  70 5 units  350

Learn from our Primary Maths Tuition Questions and Answers. Miracle Learning Centre Call 6463 8756 or sms 8128 8342/9839 9908. (Specialist in Science and Maths) for Primary, Secondary and JC levels. Miracle Learning Centre specialises in Maths tuition, Science tuition, Chemistry tuition and Physics tuition classes.

Miracle Learning Centre Primary Science Tuition Question on Life Cycle. (PSLE Science Tuition)

1. Jason collected some plants and classified them according to the chart below.

(a) From the table above, what is the difference between the hibiscus and ixora plants? [1]

(b) In the table above, one plant is wrongly classified. Identify the plant? [1]

(c) In the table above, which letter (P, Q or R) represents the `rice plant'? [1]

(d) Since mosquito fern is a non-flowering plant, how does it reproduce? [1]

Miracle Learning Centre Answer to Primary Science Tuition Question on Life Cycle. (PSLE Science Tuition) Answer: a) The Ixora is smaller than the Hibiscus. b) The coconut plant is wrongly classified because the coconut plant has flowers. c) The letter Q represents the rice plant. d) It reproduces by spores.

Learn from our Primary Science Tuition Questions and Answers. Miracle Learning Centre Call 6463 8756 or sms 8128 8342/9839 9908. (Specialist in Science and Maths) for Primary, Secondary and JC levels. Miracle Learning Centre specialises in Science tuition, Maths tuition, Chemistry tuition and Physics tuition classes.

Best Physics Tuition in Singapore

Physics tuition classes in Miracle Learning Centre is very beneficial. If you do not understand physics, you must definitely try the physics tuition class at Miracle Learning Centre.

Albert Einstein Facts

Albert Einstein is perhaps the most famous scientist of all time. Both his image and brilliant work on theoretical physics live on today and he serves as an inspiration to young scientists around the world.

Read on for interesting facts, quotes and information about Albert Einstein.

Albert Einstein was born on the 14th of March 1879 and died on the 18th of April 1955.

Born in Germany to a Jewish family, Einstein made many contributions to the field of theoretical physics.

Even when very young, Einstein showed great ability in both math’s and science. He was naturally curious and had a brilliant analytical mind.

Einstein worked in a patent office evaluating patents for electromagnetic devices not long after he graduated.

He produced perhaps one of the most famous equations ever: E = mc² (energy equals mass multiplied by the speed of light squared).

He is also well known for his theory of relativity. Special relativity being introduced in his 1905 paper “On the Electrodynamics of Moving Bodies” before Einstein developed the theory of general relativity between the years of 1907 and 1915.

Einstein won the 1921 Nobel Prize in Physics for his work on theoretical physics.

He worked on many other influential theories and projects including: the deflection of light by gravity, the quantum theory of atomic motion in solids, Brownian motion, an explanation for capillary action and much more.

Famous Albert Einstein quotes include: "Whether you can observe a thing or not depends on the theory which you use. It is the theory which decides what can be observed."

"If I were not a physicist, I would probably be a musician. I often think in music. I live my daydreams in music. I see my life in terms of music.... I do know that I get most joy in life out of my violin."

"Physical concepts are free creations of the human mind, and are not, however it may seem, uniquely determined by the external world."

"I am enough of an artist to draw freely upon my imagination. Imagination is more important than knowledge. Knowledge is limited. Imagination encircles the world."