What is a unit?

Write the SI units of mass, temperature, energy, and density.

Niva claimed that an alternative formula for power is $\rm P = mv^{2}$ and the formula for pressure: P = mv/A. Check the validity of given formula by the analysis of units.

Chandani wanted to investigate the effects of substances mixed with the soil on plant growth. She decided to mix lime, urea fertilizer, common salt, and compost manure in the soil. Then she brought a bucket of soil from a nearby field and sieved it. She put that soil equally into 12 uniform-sized pots. Then she mixed two spoons of salt in every three pots, two spoons of urea fertilizer in each of the next three pots, two spoons of table salt in each of the next three pots and finally, two spoons of compost fertilizer in each of the remaining three pots. She then planted similar seeds of the same plant in every pot and placed them all in a sunny place in the house. She watered all the pots every day. After the plants grew, she measured the height of each plant daily and kept a record.

i) Identify the independent variable, the dependent variable and controlled variable in Chandani's experiment.

ii) Why did Chandani use 3 pots for each experiment?

Prove that: Unit of electric resistance ohm($\Omega$) = kgm2s-3A-2.

With the help of units, check the correct one from the given equations.

What are the quantities that can be measured called?

Check the correctness of the physical equation: $\rm s = ut + \frac{1}{2} at^{2}$.

A student has to test the change in effort applied and the number of pulleys used. In this experiment, identify a controlled variable and a dependent variable from number of pulleys, load of object, effort applied, friction produced in the pulleys and type of pulley.

Differentiate between dependent variable and independent variable. Identify the dependent and independent variables in following conditions.

1. The force applied to stretch a rubber band.
2. Distance travelled by a stone thrown.

The dimensions of Power is?

What is called the rate of doing work?

In an experiment, a researcher needs to study the interrelation between the rate of photosynthesis and amount of sunlight. Which statement is true for it?

Which one of the following is a derived unit?

An image, perception or concept that is capable of measurement is called :

What is a unit?

Write the SI units of mass, temperature, energy, and density.

Niva claimed that an alternative formula for power is $\rm P = mv^{2}$ and the formula for pressure: P = mv/A. Check the validity of given formula by the analysis of units.

Chandani wanted to investigate the effects of substances mixed with the soil on plant growth. She decided to mix lime, urea fertilizer, common salt, and compost manure in the soil. Then she brought a bucket of soil from a nearby field and sieved it. She put that soil equally into 12 uniform-sized pots. Then she mixed two spoons of salt in every three pots, two spoons of urea fertilizer in each of the next three pots, two spoons of table salt in each of the next three pots and finally, two spoons of compost fertilizer in each of the remaining three pots. She then planted similar seeds of the same plant in every pot and placed them all in a sunny place in the house. She watered all the pots every day. After the plants grew, she measured the height of each plant daily and kept a record.

i) Identify the independent variable, the dependent variable and controlled variable in Chandani's experiment.

ii) Why did Chandani use 3 pots for each experiment?

Prove that: Unit of electric resistance ohm($\Omega$) = kgm2s-3A-2.

With the help of units, check the correct one from the given equations.

What are the quantities that can be measured called?

Check the correctness of the physical equation: $\rm s = ut + \frac{1}{2} at^{2}$.

A student has to test the change in effort applied and the number of pulleys used. In this experiment, identify a controlled variable and a dependent variable from number of pulleys, load of object, effort applied, friction produced in the pulleys and type of pulley.

Differentiate between dependent variable and independent variable. Identify the dependent and independent variables in following conditions.

1. The force applied to stretch a rubber band.
2. Distance travelled by a stone thrown.

The dimensions of Power is?

What is called the rate of doing work?

In an experiment, a researcher needs to study the interrelation between the rate of photosynthesis and amount of sunlight. Which statement is true for it?

Which one of the following is a derived unit?

An image, perception or concept that is capable of measurement is called :