science quiz

4. Which of the following options correctly distinguishes between ductility and malleability?
   
   
   
   

• 4. a) Ductility is the ability of a material to be stretched without breaking, while malleability is the ability of a material to be hammered or rolled into thin sheets without breaking.

• 4. b) Ductility is the ability of a material to be hammered or rolled into thin sheets without breaking, while malleability is the ability of a material to be stretched without breaking.

• 4. c) Ductility is the ability of a material to be molded into various shapes without breaking, while malleability is the ability of a material to be stretched without breaking.

• 4. d) Ductility is the ability of a material to be stretched and hammered into various shapes without breaking, while malleability is the ability of a material to be molded into various shapes without breaking.

Among the following options, which represents a diatomic compound that manifests itself as a halogen, possesses a distinct yellow-green color, and is widely employed for its sanitizing and whitening properties?

• a) Carbon dioxide (CO2).

• b) Water (H2O).

• c) Chlorine (Cl2).

• d) Sodium chloride (NaCl).

A car accelerates uniformly from rest to a speed of 30 m/s in 10 seconds. What is the average acceleration of the car?

The speed-time graph below represents the motion of a cyclist. What is the total distance covered by the cyclist?

13. Which of the following elements does not belong to the transition metal group?
    
    
    
    

• 13. a) Iron (Fe)

• 13. b) Copper (Cu)

• 13. c) Zinc (Zn)

• 13. d) Aluminum (Al)

Which of the following elements is a noble gas and is located in the 6th period of the periodic table?

• Krypton.
  

• Neon.
  

• Helium

• 
  Argon

1. A car travels along a curved path with a varying speed. Which of the following statements about the car's motion is correct?
   
   
   

• 1. a) The car's velocity is changing but its speed remains constant.

• 1. b) The car's speed is changing but its velocity remains constant.

• 1. c) Both the car's speed and velocity are changing.

• 1. 
     d) Neither the car's speed nor velocity is changing.

1. A particle moves along a straight line. At time t=0, it has a velocity of 10 m/s. Which of the following statements about the particle's motion is correct?
   
   
   
   

• 1. a) The particle's speed is always increasing.

• 1. b) The particle's acceleration is always positive.

• 1. c) The particle's displacement is always increasing.

• 1. d) The particle's velocity is always positive.

2. A car accelerates from 0 to 60 mph in 6 seconds. What is its acceleration in m/s²?

  

• 4.9 m/s²

• 6.7 m/s²

• 8.6 m/s²

• 10.8 m/s²

What is the difference between positive and negative acceleration?

• Positive acceleration is an increase in velocity, and negative acceleration is a decrease in velocity

• Positive acceleration is an increase in velocity but negative acceleration is a decrease in velocity

• Positive acceleration is always towards the right, while negative acceleration is always towards the left.
  

• Positive acceleration is always towards the left, while negative acceleration is always towards the right