You are on a road trip to San Francisco. You drove 200 miles in 3 hours, and then stopped for lunch for
30 minutes. After lunch, you traveled 150 miles in an hour and a half. What was your average speed
for this trip? SHOW YOUR WORK!
a. Calculate the average speed including the time spent for lunch.
b. Calculate the average speed without the lunch stop
Answers
Answer:
Explanation:
a)
Average speed is total distance over change in time.
So
total distance=(200+150)
=350
total time=(3+0.5+1.5)
=5
350 km/5 hours
70km/hour
Therefore:
70 km/h is the average speed
b)
total distance=(200+150)
=350
total time=(3+1.5)
=4.5
350/4.5
=approx. 77.77 km/hour
Therefore:
77.77/hour is the average speed
Don't know if you round but uh yeah
Related Questions
Which element has the smallest atomic radius?
A-Na
B-H
C-Li
D-K
Answers
Answer:
B Hydrogen
Explanation: Hydrogen is the smallest element.
Match each type of mass movement to its description.
the rapid downhill flow of a mixture of rock,
soil, and water
slump
mudflow
the slow downhill movement of rock and soil
creep
the rapid downhill movement of a mass of
rock, debris, or soil
landslide
a loosely connected mass of rock and soil
that moves a short distance
Answers
Answer: np
Explanation:
Correctly matched are :
landside - rapid movement of rock, debris, and soil. mudflow - mixture of rocks, soil, water. slump - loosely mass of rocks and soil.What is a landslide?A landslide is also called a land slip. It refers to several forms of mass wasting and may include a wide range of ground movements. They occur in a variety of environments characterize by gentle and steep slope gradients.
The mudflow is a mixture of rocks and soil along with water. While a creep is a slow downloads movement of rocks and soil.
Find out more information about the mass movement.
brainly.com/question/6068732
What THREE organisms use photosynthesis?
Answers
Answer:
Plants, bacteria, and algae
Explanation: Plants are known to gather food from the sun, algae is a type of plant, and bacteria gather food from the sun while they are in the air.
Why is it so important to use more than just fossil fuels for our energy sources?
Answers
Answer:
Fossil fuels are non-renewable which means that they wont last forever and they contribute largely to unnatural climate change.
Explanation:
The name for the ionic compound CoHPO4
Answers
Answer:
Dicalcium phosphate. (I'm sure meant for the "o" to be an "a" for Calcium).
Explanation:
I hope this helps! :D Have a nice night!
A pH of 1 there are a lot of ______ in a solution. 2.A pH of 14 there are a lot of ______ in a solution.
Answers
Answer:
Hydrogen or hydroxonium ions in the solution
Hydroxyl ions in the solution
Explanation:
A pH of 1 shows there is a lot of hydroxonium ions in the solution and a pH of 14 shows there is a lot of hydroxyl ions in the solution.
The pH scale ranges from 1 to 14 As the values tends towards 1, the acidity increases due to concentration of hydroxonium ions in the solution. As the pH tends towards 14, the basicity increases due to the concentration of hydrogen ions in the solution.In a solid, the particles..
A. Vibrate in place
B. Overcome the strong attraction
C. Slide past one another
D. Move freely
Answers
explanation
Which particles are referred to as nucleons (subatomic particles located in the nucleus)?
Answers
Answer:
protons and neutrons
Explanation:
The protons have a positive electrical charge and the neutrons have no electrical charge. A third type of subatomic particle, electrons, move around the nucleus. The electrons have a negative electrical charge
Write one equation each for the decomposition reactions where energy is supplied in the form of (a) electricity and
Answers
Answer:
Electrolysis of water
Explanation:
The electrolysis of water is a decomposition reaction in which electricity is used to break down a compound into simpler molecules.
Decomposition of water is carried out in the Hofman Voltameter.
This process is achieved by passing current through an acidified water.
The expression is given as:
2H₂O → 2H₂ + O₂
the pH of a solution of a is increased from 2 to 3 then the concentration of h + ions will become
Answers
Answer:
The H+ concentration would decrease by 10 fold. From .01 to .001
Explanation:
This is due to how a pH of 2 is expressed in scientific notation as 10^-2 power when referring to H+ concentration so a pH of 3 would be 10^-3. Hence it would be 10 times smaller in concentration as the power increases to the negative power the smaller the concentration becomes.
YOU BETTER NOT PASS THIS!! NEED ANSWERS NOW
What are you separating when you use the process of distillation? DESCRIBE how you would separate a mixture using distillation.
Answers
Answer:
the process of separating several mixtures of coal with the process of fractional distillation
Explanation:
_Fe +_02 → _Fe2O3
Answer:4,3,2
Answers
Answer:
4Fe+3O2------>2fe2O3
Explanation:
please follow me
and sa thanks for my answer
How many moles of Ba(NO3)2 are there in 0.25 L of a 2.00 M Ba(NO3)2 solution?
Use Molarity equals StartFraction moles of solute over liters of solution EndFraction..
0.13 mol
0.50 mol
2.25 mol
8.0 mol
Answers
Answer:
0.5moles
Explanation:
Given parameters:
Volume of solution= 0.25L
Molarity of solution = 2.00M
Unknown:
Number of moles = ?
Solution:
To solve this problem;
Molarity is the number of moles of solute in a given volume of solution, so
Number of moles = molarity x volume
Now insert the parameters and solve;
Number of moles = 0.25 x 2 = 0.5moles
Answer:
b
Explanation:
got it right on test
Write the names of the following covalent compounds: no2
Answers
Answer:
nitrogen dioxide
Explanation:
this was on my chemistry test
Complete Symbols
Find each of these:
a) number of protons
b) number of neutrons
c) number of electrons
d) atomic number
e) mass Number
80Br35
Answers
Answer: a) 35 , b) 45 , c) 35 , d) 35 , e) 80
Explanation:
a) - protons equal to atomic number of element , b) - subtract atomic number by number of protons to get neutrons (80 - 35 = 45) , c) - protons same as electrons unless its an ion , d) - atomic number is equal to protons , e) - protons plus neutrons equal mass number (35 + 45 = 80). :)
Explain why, in a balanced chemical equation C + O2 CO2, we know that 1 gram of C will not react exactly with 1 gram of O2.
Answers
Answer:
See the answer below
Explanation:
From the equation, 1 mole of C requires 1 mole of O2 for a balanced reaction.
1 g of C will not exactly react with 1 g of O2 because the 1 g of each of the reactants contain different amounts of the substance.
The amount (in moles) of a substance is the mass of that substance divided by the molar mass.
Hence, 1 g of C will contain 1/12 moles of the substance while 1 g of O2 will contain 1/32 moles of the substance.
what is the chemical equation for this?
Answers
Answer:
J
Explanation:
Chlorine Gas is Cl2 so if it isnt on the left as that its wrong.
Then on the products see that Fe III means Fe is +3 charge so we have to have 3 Cl to balance it to 0 since each cl as -1 charge.
FInally check if the equation is balanced J is maybe H but its to blurry to tell
Calculate the mass of 1.25 mol ammonium sulfide, (NH4)2S. *
Answers
Answer:
85g
Explanation:
To convert the moles of a substance to grams we need to know the molar mass of the substance. We, as first, must obtain the molar mass of (NH₄)₂S as follows:
There are 2 atoms of N, 8 of H and 1 of S:
N = 2*14g/mol = 28g/mol
H = 8*1g/mol = 8g/mol
S = 1*32g/mol = 32g/mol
Molar mass: 68g/mol
That means 1 mole of (NH₄)₂S has a mass of 68g.
1.25moles have a mass of:
1.25moles * (68g/mol) =
85gWhich order shows decreasing wavelength?
gamma → ultraviolet → infrared → radio
infrared → gamma → radio → ultraviolet
radio → infrared → ultraviolet → gamma
ultraviolet → radio → infrared → gamma
Answers
Answer:
The answer is c radio --> infrared --> ultraviolet --> gamma
Explanation:
I just did it
Answer:
C
Explanation:
just did it
The speed (c) of a wave =
Answers
Answer:
the case of a wave, the speed is the distance traveled by a given point on the wave (such as a crest) in a given interval of time. In equation form, If the crest of an ocean wave moves a distance of 20 meters in 10 seconds, then the speed of the ocean wave is 2.0 m/s.
Explanation:
Which chemicals are reactants?
0: NH₃ + 0 02
0:02 0: N2 + 0:420
A. NH3 and O2
B. O, and H2O
C. N, and H2O
D. NH3 and N2
Answers
How many grams of Cu would be needed to react with 2.0 mol of HNO3?
3 Cu(s) + 8 HNO3(aq) --> 3 Cu(NO3)2(aq) + 2 NO(g) + 4 H20(1)
Answers
Answer: B
Explanation: I just took the quiz :)
Taking into account the reaction stoichiometry, 47.655 grams of Cu is required to react with 2 moles of HNO₃.
Reaction stoichiometryIn first place, the balanced reaction is:
3 Cu + 8 HNO₃ → 3 Cu(NO₃)₂ + 2 NO + 4 H₂O
By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:
Cu: 3 moles HNO₃: 8 moles Cu(NO₃)₂: 3 moles NO: 2 molesH₂O: 4 molesThe molar mass of the compounds is:
Cu: 63.54 g/moleHNO₃: 63 g/moleCu(NO₃)₂: 187.54 g/moleNO: 30 g/moleH₂O: 18 g/moleThen, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction:
Cu: 3 moles ×63.54 g/mole= 190.62 gramsHNO₃: 8 moles ×63 g/mole= 504 gramsCu(NO₃)₂: 3 moles ×187.54 g/mole= 562.62 gramsNO: 2 moles ×30 g/mole= 60 gramsH₂O: 4 moles ×18 g/mole= 72 gramsMass of Cu requiredThe following rule of three can be applied: If by reaction stoichiometry 8 moles of HNO₃ react with 190.62 grams of Cu, 2 moles of HNO₃ react with how much mass of Cu?
[tex]mass of Cu=\frac{2 moles of HNO_{3} x190.62 grams of Cu}{8 moles of HNO_{3} }[/tex]
mass of Cu= 47.655 grams
Finally, 47.655 grams of Cu is required to react with 2 moles of HNO₃.
Learn more about the reaction stoichiometry:
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PLEASE HELP CHEMITRY!
What happens to the binding energy of lighter elements when they undergo fusion?
What is the most stable nucleus (the one with the highest binding energy)?
What happens to the binding energy of elements like uranium when they undergo fission?
Why does the fusion of elements beyond iron in our universe require a supernova? Use this diagram to explain your answer.
Answers
Answer:
.
Explanation:
Answer:
1) In fusion reactions, two light atomic nuclei fuse together to form a heavier nucleus. In doing so, they release a comparatively large amount of energy that arises from the binding energy, creating an increase in temperature of the reactants.
2) iron-56
3) When a large, fissile atomic nucleus such as uranium-235 or plutonium-239 absorbs a neutron, it may undergo nuclear fission. However, one neutron does collide with an atom of uranium-235, which then splits and releases two neutrons and more binding energy.
4) Iron cannot release energy by fusion because it requires a larger input of energy than it releases. This energy blows the outer layers of the star off into space in a giant explosion called a supernova (plural: supernovae.)
have you tried G o o g l e
If I have a 30,000 mL container that holds 65 moles of gas at a temperature of 205 degrees Celsius, what is the pressure inside the container?
Answers
Answer:
85.384 atm or 64608.13086 mmHg
Explanation:
PV= NRT
P= NRT/V
n= mols
R= gas constant (i used .0821 for atm)
T= Temp in Kelvins (Celsius degrees + 273)
V= in L
(65molsx480kx.0821)/30L
Elena makes the table below to determine the number of atoms of each element in the chemical formula 3(NH4)2SO4. A table with 3 columns and 4 rows. The first column labeled element has entries nitrogen, hydrogen, sulfur, oxygen. The second column labeled calculation has entries 1 times 2 times 3 , 4 times 2 times 3, 1 times 4 times 3, 4 times 3. The third column labeled total atoms has entries 6, 24, 12, 12. What mistake did Elena make? She should not have multiplied the sulfur atoms by the subscript 4. She should not have multiplied the nitrogen atoms by the subscript 2. She should not have multiplied the oxygen atoms by the coefficient 3. She should not have multiplied the hydrogen atoms by the coefficient 3.
Answers
Answer:
c
Explanation:
because i got 100 on the quiz
Answer: A) She should not have multiplied the sulfur atoms by the subscript 4
Explanation: got an 100 on the quiz:)
mass in grams of 3.32 mol k
Answers
Answer:
129.8 grams
Explanation:
Im a bit confused of what your are asking but if your are asking the mass in grams of K (Potassium) it is very easy dont worry
You multiply mols x Molecular weight.
So
3.32x 39.1= 129.8 grams
calculate the percentage of iron in iron (III) sulphate
Answers
Answer:
28.01 percent
Explanation:
Iron (III) sulphate, [tex]Fe_2(SO_4)_3[/tex], has 2 atoms of Fe.
One atom of Fe has a molar weight of 56. Hence, 2 atoms of Fe would have a total molar weight of 56 x 2 = 112 g/mol
Molar weight of [tex]Fe_2(SO_4)_3[/tex] = 399.88 g/mol
Percentage Fe in [tex]Fe_2(SO_4)_3[/tex] = 112/399.88 x 100%
= 28.01%
The percentage of iron is iron (III) sulphate is, therefore, 28.01 percent.
Explain why Ra is larger than Be. With 2 points.
Answers
Explanation:
Radium(Ra)=>atomic number=88
BERYLLIUM (Be)=>atomic number =4
why is Ra larger than Be
1. since the atomic number of Ra is greater than Be, the number of electrons is more, which means there are more number of shells present in Ra than Be. (atomic Radius)2. the more the valence electron (excluding fully filled ones) the less is the nuclear attraction forcesince Ra has more valence electron in its outermost shell, the nuclear attraction force is less which means that Ra 's size is greater than Be.hope it helps:)
The name for TiSO5 is
Answers
Answer:
Titanium oxide sulphate
Explanation:
How does altitude affect the freezing, melting, and boiling points of water?
Answers
Answer:
At higher altitudes, air pressure is lower. When atmospheric pressure is lower, such as at a higher altitude, it takes less energy to bring water to the boiling point. Less energy means less heat, which means water will boil at a lower temperature at a higher altitude.
In an ordinary container (exposed to atmospheric pressure). The freezing point will increase with altitude (and corresponding decrease in atmospheric pressure), but the difference is very slight.
Explanation:
When at a higher altitude , the atmospheric pressure is usually low and it
requires lesser amount of energy for the water to reach its boiling point. This
means that at higher altitudes , water boils at a lower temperature.
The freezing point of water increases with a higher altitude. This means that
water freezes at a higher temperature although the difference is very small.
The low pressure present in higher altitudes increases the melting point of
water(ice)
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