Assignment 1

What type of physical quantity is time?

• Vector quantity

• Scalar quantity

• Vector and Scalar quantity

• All of the above

Which of the following is the correct unit for time?

• S

• s²

• seconds

• hours

Which of the following instruments is used to measure time?

• Hours

• Calculator

• Seconds

• Pendulum

What are the units for frequency?

• Herz

• Hez

• Hertz

• Htz

Physical quantities that are determined directly through measurements are called_______

• Basic physical quantities

• Derived Physical quantities

• Mechanics physical quantities

• Physics physical quantities

Which combination shows derived physical quantities in measurements

• Length, density, current

• Area, mass, time

• Density, volume, temperature

• Area, energy, density

The fundamental physical quantities that are used in mechanics are:

• Mass, temperature, time

• Electric current, mass, time

• Mass, length, time

• Length, time, amount of substance

A body has a mass of 1600 g and its volume is  $0.002\ m^3$ . Determine its density.

•  $800\ gcm^{-3}$  

•  $800\ kgcm^{-3}$  

•  $0.8\ kgm^{-3}$  

•  $800\ kgm^{-3}$  

The shadow of a metre rule used to estimate the height of a tree is 75cm long and that of the tree is 840 cm long.

What is the estimated height of the tree in metres?

• 11.2 m

• 1120 m

• 1.120 m

• 112 m

When an object of mass 85 g is fully immersed in a measuring cylinder, it displaces a volume of 17 cm ³. What is the density of the object in SI units?

• 5 g/cm ³

• 5000 g/cm ³

• 5000 kg/cm ³

• 5000 kg/m ³