motion and chemical reaction

The chemical reactions are used in

• medicine industry

• fertilizers industry.

• food industry.

• all of the previous answers.

The mass of 2 molecules of sodium hydroxide equals

gm.[knowing that the atomic mass of sodium (23), hydrogen (1) and oxygen (16)]

• 40

• 80

• 60

• 160

The weight of an object of 5 kg mass [Knowing that the acceleration due to gravity is 10 m/sec ]

• 70 N

• 50 Kg

• 50 N

• 60 N

Breaking of the reactants bonds and forming

new ones among the products.

• chemical equation

• chemical reaction

• chemical bond

• covalent bond

.....................oxides affect the nervous system

• oxygen

• carbon

• nitrogen

• sulpher

All of the following are examples for some fundamental phenomena except

• nuclear explosions

• wind motion

• water motion.

• lightning

.............. is the measuring unit of the force

• m/sec

• Kg

• J

• N

All of the following are from the effects of the force except

• moving a static object.

• changing the direction of a moving object.

• changing object's mass.

• increasing the speed of a moving object.

What type of motion is this?

• Periodic

• Curvilinear

• Transition

• vibrating

What type of motion is this?

• Translatory

• Circulatory

• Oscillatory

• mechanical