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4 years ago

During which of the following chemical changes does a precipitate form?

Physics

2 answers:

babymother [125]4 years ago

5 0

Answer is B.........

kolbaska11 [484]4 years ago

3 0

Answer: Option (B) is the correct answer.

Explanation:

A solid which is not soluble and has formed from the liquid solution is known as a precipitate.

For example, when lemon juice is added to milk then it results in the formation of paneer (cheese) that is insoluble.

Hence, we can conclude that during the addition of lemon juice into milk will bring a chemical change by forming a precipitate.

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What is the minimum force required to increase the energy of a car by 69 J over a distance of 42 m? Assume the force is constant

sineoko [7]

ANSWER: 1.6N (forth option)

EXPLANATION:
E= Force x displacement
69=F(42)
69/42 = F
F=1.64 N

Answer : 1.6N

3 0

3 years ago

You drive a car 1600 ft to the east, then 2500 ft to the north. The trip took 2.5 minutes. What was the magnitude of your averag

elena-14-01-66 [18.8K]

Answer:

$Velocity=6.03m/s$

Explanation:

Given data

Time t=2.5 minutes=150 seconds

Distance A=1600 ft=487.68 m........east

Distance B=2500 ft=762m ........north

To find

Average velocity

Solution

First we need to find the resultant distance magnitude.To find that we apply Pythagorean theorem to find hypotenuse

$A^{2}+B^{2}=C^{2}\\ C=\sqrt{A^{2}+B^{2}}\\ C=\sqrt{(487.68m)^{2}+(762m)^{2}}\\ C=904.7m$

$Velocity=\frac{Distance}{Time}\\Velocity=\frac{904.7m}{150s}\\Velocity=6.03m/s$

7 0

3 years ago

Where are the oldest rocks found ?

nignag [31]

Answer:

zircons

Explanation:

they are over 4.375 billion years old

7 0

3 years ago

3 characteristics of chemical change

gtnhenbr [62]

Answer:

A physical change involves a change in physical properties. Examples of physical properties include melting, transition to a gas, change of strength, change of durability, changes to crystal form, textural change, shape, size, color, volume and density.

3 0

3 years ago

Read 2 more answers

A gas is compressed at constant temperature from a volume of 5.68 L to a volume of 2.35 L by an external pressure of 732 torr. C

Vlada [557]

Answer: The work done in J is 324

Explanation:

To calculate the amount of work done for an isothermal process is given by the equation:

$W=-P\Delta V=-P(V_2-V_1)$