Dubai Stem Olympiad 2019-20 Round 2 | Intermediate Category

1. Why is pluto not considered a planet?

Pluto does not produce enough gravitational force to clear similar sized objects from its orbit

Pluto is not spherical

Pluto has a different orbit to all the other planets in the solar system

Pluto does not have a magnetic core

2. For a third class lever, what is the order of the fulcrum, load and effort?

Fulcrum, effort, load

Effort, load, fulcrum

Effort, fulcrum, load

Load, fulcrum, effort

3. What are three non-contact forces?

Magnetic, Electrostatic, gravitational

Friction, Gravitational, Electrostatic

Tension, Gravitational, Magnetic

Upthrust, Gravitational, Magnetic

4. George saw a flash of lightning 6km away and then 20 seconds later heard thunder, approximately how fast did the sound travel?

300m/s

320m/s

200m/s

400m/s

5. Samantha is trying to print her homework assignment when the paper suddenly gets jammed in the printer. The computer automatically stops printing the document. This is a because a/an _____________ signal is sent from the printer to the processor. Fill in the blank

Interrupt

Warning

Buffer

Intermediary

6. Jim is given the following task: Place the numbers from 1 to 9 inclusive in the grid below, with one number in each square so that the total of every row, column, and diagonal is 15. Do not repeat any numbers, use all numbers given. Jim completes the task correctly, what is the sum of the numbers in the four corners?

20

15

16

22

7. Mark is creating an art piece using the new 3D printer he bought. The model he is printing requires attention to detail and should be rigid but does not need to be very durable or temperature resistant. Which of the following materials would be most appropriate to print with?

PLA

ABS

Metal

TPU

8. Tracy is a turtle who can draw different patterns using Python Language. penup() - This command can tell Tracy to not to leave a trace behind while moving pendown() - This command can tell Tracy to leave the trace behind while moving What letter it will draw using the following code

A

I

T

P

9. In the diagram, what is the sum of the marked angles?

240

540

360

720

10. A box contains a collection of triangular and square tiles. There are 25 tiles in the box, containing 84 edges total. How many square tiles are there in the box?

12

9

11

10

11. If a, b and a - b all have positive values, which option has the smallest value

B2 / a2

B / a

A / b

A2 / b2

12. Kenny is learning the functions of different parts of the CPU (Central Processing Unit). Which of the following parts of the CPU would handle the following instruction and what would it return? Instruction: 123>321

ALU, Returned value: False

IAS, Returned value: True

IAS, Returned value: False

ALU, Returned value: True

13. What is the total energy of an object that has a mass of 14kg?

1.26 x 1019

1.26 x 1018

1.27 x 1019

1.27 x 1018

14. What is the volume of this pyramid where s = side length of the hexagon and h = height of the pyramid?

V = (((√ 3)/4)s2 ) x 6 x h)/3

V = (((√ 3)/4)s2 ) x 6 x h)

V = (((√ 3) ) x 6 x h)/3

V = (((√ 3))s2 ) x 6 x h)/3

15. What type of reaction is making chemical bonds?

Exothermic

Endothermic

Combustion

Equilibrium

16. Joseph is an interior designer. He has just finished designing a bedroom for a customer. He would now like to render a 3D version of it so that he can show it to his customer before approving the model. Which of the following processors would be best suited to handle this operation?

A single-core CPU with high clock speed

A quad-core CPU with low clock speed

A dual-core CPU with high clock speed

A dual-core CPU that can be overclocked

17. Three unit squares and two line segments connecting two pairs of vertices are shown. What is the area of triangle ABC?

1/6

1/3

1/5

2/9

18. Reuben is testing an algorithm for a program that takes in a set of characters, processes them and outputs their ASCII values along with a sum of their ASCII values. Which of the following consists of "normal" test data that would NOT create an error for this algorithm?