Science

१ देखि ५० सम्माको योगफल कति हुन्छ ?

• १२७५

• १२७६

• १२७४

• १२७७

• १२७५

Select the following which demonstrate a change from kinetic energy to potential energy?

• A sled sliding up a hill

• A ball that is thrown into the air

• A car driving down a hill

• A rubber band being stretched

What is an example of sound energy?

• Guitar strings being plucked

• Mr Broadway talking about sound energy

• Solar panels generating electricity

• A machine in an assembly line

This type of thermal energy transfer can take place in gases only.

• conduction

• convection

• radiation

This type of thermal energy transfer can take place in fluids (liquids & gases). Rising of warmer fluid and sinking of cooler fluid forms a current.

• conduction

• convection

• radiation

What type of energy is in this picture?

• Kinetic energy

• Rubber energy

• Elastic energy

• Stored energy

When glow sticks snap, they produce a glow. What energy transformation takes place?

• Thermal to light

• Light to radiant

• Potential to heat

• Chemical to light

This type of thermal energy transfer can take place in solids, liquids, & gases when two objects are touching.

• conduction

• convection

• radiation

Energy is:

• The ability to do work

• The amount of power

• Movement

• Causing things to happen

Work is:

• The amount of energy used in creating a force

• The amount of energy used in moving an object

• The amount of energy used in creating power

• Annoying