All categories

3 years ago

From the list which items of ppe should always be put on first

Chemistry

1 answer:

fenix001 [56]3 years ago

4 0

Where's the list? If you show it maybe I can help

You might be interested in

This diagram shows the forces acting on a car. The center dot represents the car, and the arrows represent the forces acting on

Mariulka [41]

Answer : The correct option is B- Towards the left.

Solution : Given,

Force on car in upward direction, $F_1$ = 6000 N

Force on car in downward direction, $F_2$ = 6000 N

Force on car in right direction, $F_3$ = 5000 N

Force on car in left direction, $F_4$ = 6000 N

Force : Force is equal to the mass multiplied by the acceleration. The force is directly proportional to the acceleration.

Formula : F = m × a

where, F is force, m is mass and a is acceleration.

From the given diagram we conclude that the $F_1$ and $F_2$ are in opposite direction and the force acting on car are same. So, their net force is zero.

And in case of $F_3$ and $F_4$ , the net force will not be zero because force acting on car are different. The car will accelerate towards left direction because $F_4$ is higher than the $F_3$ .

So, the car will accelerate towards left direction.

3 0

3 years ago

What determines the most likely oxidation state of an element?

Salsk061 [2.6K]

<span>C. The number of electrons the element needs to lose or gain to have a full valence shell</span>

8 0

3 years ago

Read 2 more answers

Which of the following is NOT a method of transferring heat?

Eva8 [605]

The answer is Reduction. All three methods (convection, radiation, and conduction) are all ways of transferring heat. Convection is the transfer of heat by means of a medium such as air. Conduction is the transfer of heat from the contact of two surfaces at different temperatures. Radiation is the transfer of heat via electromagnetic waves.

Reduction is a chemical reaction that involves the gain of electrons. It is the opposite of oxidation which involves the loss of electrons.

5 0

3 years ago

What is the equation for the energy levels of the hydrogen atom

Kaylis [27]

Answer: E = (13.6 eV) [1/nf² - 1/ni²]

En = (-13.6 eV)/n²

where n=1,2,3...

Explanation:

According to Bohr's theory each spcified energy value( E1,E2,E3...) is called energy level of the atom and the only allowable values are given by the equation

En = (-13.6 eV)/n²

The energy change (ΔE) that accompaies the leap of an electron from one energy level to another is given by equation

E = (13.6 eV) [1/nf² - 1/ni²]

8 0

3 years ago

What is the experimental molar heat of combustion?

IRISSAK [1]

Explanation:

Molar heat combustion:

Molar heat of combustion is defined as heat released when 1 mole of substance is burnt under the action of oxygen gas to give water and carbon-dioxide.It is measured in kiloJoules (kJ) per mole.This heat of energy can be positive or negative.

If the enthalpy is positive than the reaction is said to be an endothermic reaction.
If the enthalpy is negative than the reaction is said to be an exothermic reaction.

3 0

3 years ago

Read 2 more answers