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3 years ago

Select all the correct answer(s) and explanation(s) for the following statement:

Physics

1 answer:

Liula [17]3 years ago

6 0

Answer:

The answer is c) while the statement is false, the given reasons for it being false are incorrect.

Explanation:

The speed of a chemical reaction must be proportional to the number of molecules per unit of time with enough energy to achieve the transition state. This transition state has an energy superior to that of the reagents and that of the products, establishing among them an energy barrier that has to be overcome in order for the reaction to take place.

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CAN YOU HELP PLZZ & THX

maxonik [38]

Answer:

6.7x10 -7 C

Explanation:

The -7 is like a exponent on top, I think.

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3 years ago

A large aquarium of height 5 m is filled with fresh water to a depth of D = 1.80 m. One wall of the aquarium consists of thick p

Damm [24]

To solve the problem we will first start considering the Pressure given the hydrostatic definition of the product between the density, the gravity and the depth. We will define the area where the liquid acts and later we will use the definition of the force as a product between the pressure and the area to calculate the force given in the two depths. The gauge pressure at the depth x will be

$(P-P_a)= \rho g x$

This pressure acts on the strip of area

$dA = 7.6dx$

The force acting on that strip is given by,

$dF = (P-P_a)dA$

$dF = \rho g xdA$

$dF = 7.6 \rho g x dx$

To evaluate the force, we will then consider the integral of the pressure as a function of the Area, or the integral of the previously found terms.

$F = \int_0^x 7.6 \rho g x dx$

$F = 3.8 \rho g x^2$

Evaluating at the initial depth of 1.8m and the final depth of 4.4 we have then that,

$F_{1.8} = 3.8 (998)(9.8)(1.8)^2 = 120416.28N$

$F_{4.4} = 3.8(998)(9.8)(4.4)^2 = 719524.46N$

Therefore the Net force will be

$F = F_{4.4}-F_{1.8}$

$F = 719524.46-120416.28$

$F = 599108.18N$

8 0

4 years ago

PLEASE HELP ASAP!!! CORRECT ANSWER ONLY PLEASE!!!

Ne4ueva [31]

My teacher taught me that besides the type of wave, wavelength doesn't change unless you shorten the wave, and she used string as an example. Making the string shorter causes the wavelength to decrease so it can't be B. Your answer is A

8 0

4 years ago

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A lever has a mechanical advantage of 5.4. If you apply a force of 500 N to the lever, how much force does the lever apply to th

Yanka [14]

Force applied by the lever to the object=2700 N

Explanation:

Mechanical advantage= $\frac{LOAD}{EFFORT}$

mechanical advantage= 5.4

effort force= 500 N

we need the load force

5.4= load/500

load=2700 N

Thus the force applied by the lever to the object=2700 N

6 0

3 years ago

Which statement describes the process of subduction? Convection currents pull a plate into the mantle. One plate slides beneath

mixas84 [53]

Answer:

Subduction is the geological process in which one plate moves under another due to gravitational pull. The regions where this process occurs called subduction zones.

A subduction is a tectonic plate which is made up of crust and upper layer of mantle. These two layers are called as lithosphere.

Example: South America, central America and cascade volcanoes. In which the oceanic plate descends beneath a continental plate.

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4 years ago

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