Ask question

Ask question

All categories

Liono4ka [1.6K]

3 years ago

9

An ostrich runs north in a straight line for 21 meters. She then turns around and runs 25 meters back toward her nest (south) on

the same path. What is her displacement? please explain

1 answer:

drek231 [11]3 years ago

6 0

The ostrich runs 21 N then goes back by 25 S

The displacement is -4 S

21 - 25 = -4

You might be interested in

4) The initial rate of the reaction between substances P and Q was measured in a series of

ASHA 777 [7]

Answer:

The initial rate of the reaction between substances P and Q was measured in a series of

experiments and the following rate equation was deduced.

$rate = k[P]^{2} [Q]$

Complete the table of data below for the reaction between P and Q

Explanation:

Given rate of the reaction is:

$rate= k[P]^{2} [Q]\\=>[Q]=\frac{rate}{k.[P]^{2} } \\and \\\\\\\ [P]=\sqrt{\frac{rate}{k.[Q]} }$

Substitute the given values in this formulae to get the [P], [Q] and rate values.

From the first row,

the value of k can be calulated:

$k=\frac{rate}{[P]^{2}[Q] } \\ =\frac{4.8*10^-3}{(0.2)^{2} 2. (0.30)} \\ =0.4$

Second row:

2. Rate value:

$rate =0.4* (0.10)^{2} * (0.10)\\\\ =4.0*10^-3mol.dm^-3.s^-1$

3.Third row:

$[Q]=\frac{rate}{k.[P]^{2} } \\ =9.6*10^-3 / (0.4 *(0.40)^{2} \\ =0.15mol.dm^{-3}$

4. Fourth row:

$[P]=\sqrt{\frac{rate}{k.[Q]} }\\=>[P]=\sqrt{\frac{19.2*10^-3}{0.60*0.4} } \\=>[P]=0.283mol.dm^{-3}$

6 0

2 years ago

Which formula is a molecular compound?<br><br> H2O2<br> CaO<br> MgS<br> NaCl

Alborosie

Answer:

H2O2

Explanation:

8 0

3 years ago

Read 2 more answers

Kostya randomly chooses a number from 1 to 10. What is the probability he chooses a number less than 5?

Ghella [55]

A. 1/2

Explanation- There is a 5/10 chance of choosing on of the numbers which simplifies to 1/2

3 0

2 years ago

Read 2 more answers

What makes organic compounds reactive?

konstantin123 [22]

Answer:

The functional groups

Explanation:

An organic compound is a compound that contain carbon and another element such as hydrogen, oxygen, nitrogen, etc.
Functional groups are the portions of an organic compound that is capable of characteristic reactions.
Functional groups determine the chemical and physical properties of many organic compounds.

3 0

3 years ago

Choose the correct answer !

zavuch27 [327]

Answer:

Osmium

Explanation:

The metals conduct electricity the best, in this question the metal would be osmium.

4 0

2 years ago