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3 years ago

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In a chemical reaction, activation energy increases the amount of chemical energynumber of particlestemperature of the reactants

. This outcome causes the particles to collide, which results in the breaking upformationreaction of new products.

1 answer:

lianna [129]3 years ago

8 0

kinetic........................................

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How far can a person run in 15 minutes if he runs at an average speed of 16 km/hr?

anygoal [31]

Answer:

4km

Explanation:

15 minutes is 1/4 of an hour.

1/4 of 16 is 4.

3 0

3 years ago

IP The x and y components of a vector r⃗ are rx = 16 m and ry = -8.5 m , respectively

fiasKO [112]

as it is given that

$r_x = 16 m$

$r_y = -8.5 m$

now we will have

$\vec r = 16 \hat i - 8.5 \hat j$

now the magnitude of this vector is given as

$|r| = \sqrt{16^2 + 8.5^2}$

$|r| = 18 m$

now to find the direction we can use

$tan\theta = \frac{r_y}{r_x}$

$tan\theta = \frac{-8.5}{16}$

$\theta = tan^{-1}(-0.53)$

$\theta = - 28^0$

4 0

3 years ago

Two parallel square metal plates that are 1.6 cm apart and 24 cm on each side carry equal but opposite charges uniformly spread

Fiesta28 [93]

The amount of extra electrons present on the negative surface is

57.2 x $10^{10}$ .

Distance =1.6 cm

Side = 24 cm

Electric field = 18000 N/C

Calculating the capacitance in the metal plates is necessary.

Using the capacitance formula

$C=\frac{e_{0}A }{d}$

Putting the value

C = 8.85 x $10^{-12}$ x (24 x $10^{-2}$ $)^{2}$ /1.6 x $10^{-2}$

C = 0.318 x $10^{-10}$ F

<h3>Calculation of potential</h3>

V = Ed

V = 18000 x 1.6 x $10^{-2}$ V

V = 288 V

<h3>Calculation of charge</h3>

Q = CV

Q = 0.318 x $10^{-10}$ x 288

Q = 91.54 x $10^{-10}$ C

Charge on the both the plates

Q = +91.54 x $10^{-10}$

Q = - 91.54 x $10^{-10}$

Calculation of excess electrons on the negative surface:

n = q/e

n = 91.54 x $10^{-10}$ / 1.6 x $10^{-19}$

n = 57.2 x $10^{10}$ electrons

Hence, the number of excess electrons on the negative surface is

57.2 x $10^{10}$ .

Learn more about capacitance here:

brainly.com/question/14746225

#SPJ4

8 0

9 months ago

Which statements correctly describe the formula or name of a compound? Select all that apply.

PtichkaEL [24]

Answer:

The formula of nitrogen trifluoride is NF 3

The formula of ammonia is NH3

The formula of magnesium hydroxide is Mg(OH)2

Explanation:

The formula of a compound refers to the correct representation of the compound using appropriate chemical symbols.

The formula of a compound is derived from the symbols of its constituent elements. The formula of the compound must correctly show the number of atoms of each element in one formula unit of the compound.

In the answer section, the correct names or formulas of some compounds have been shown

8 0

3 years ago

Read 2 more answers

A golfer collected data on the distance a golf cart traveled in a straight line and plotted it on a graph

devlian [24]

Answer:

The cart moved away from the starting point between 8 s and 10 s.

Explanation:

Given that :

Which of these does NOT describe the cart’s motion on this graph?

The cart was at rest between 5 s and 7 s : From the distance of golf cart Vs time graph ; the car was at rest between 5s and 7s as the graph was flat with that time interval, meaning there was no change in distance.

The cart moved toward the starting point between 7 s and 12 s. : The graph depicts a negative slope at this time interval as the distance from starting point fell from about 26 m to 10 m

The cart moved away from the starting point between 8 s and 10 s. : At this time interval, the cart moved towards the starting not and not away. This could be seen in the decrease in Distance from starting point between the tune interval.

The cart moved away from the starting point between 2 s and 5 s. - - > The cart moved away from the starting point, with the positive slope signifying an increase in distance.

Therefore, The cart moved away from the starting point between 8 s and 10 s does not describe the motion of the cart on the graph.

5 0

3 years ago