A car with a mass of 3,500lbs accelerates negatively from 35m/s to 8m/s in 8s. What is the
car's negative acceleration?

Answers

Answer 1

Answer:

[tex]a=-3.37\ m/s^2[/tex]

Explanation:

Given that,

A car accelerates negatively from 35m/s to 8m/s in 8s.

We need to find the car's acceleration.

Initial speed, u = 35 m/s

Final speed, v = 8 m/s

Time, t = 8 s

The acceleration of an object is equal to the rate of change of velocity. So,

[tex]a=\dfrac{v-u}{t}[/tex]

Put all the values,

[tex]a=\dfrac{8-35}{8}\\\\a=-3.37\ m/s^2[/tex]

So, the acceleration of the car is equal to [tex]-3.37\ m/s^2[/tex].


Related Questions

New concept cars in the Detroit Auto Show feature engines that burn hydrogen gas in air to produce water vapor. Suppose that fuel tank contains 150. L of H2 gas at 20.0 atm pressure at 25.0˚C. If all of this gas is burned, what mass (in grams) of water vapor is produced?

Answers

Answer:

247.2g

Explanation:

Using the general gas law equation as follows:

PV = nRT

Where;

P = pressure (atm)

V = volume (L)

n = number of moles (mol)

R = gas law constant (0.0821 Latm/molK)

T = temperature (K)

According to the information in this question, a fuel tank contains 150. L (V) of H2 gas at 20.0 atm (P) at 25.0˚C (T)

Temperature = 25°C = 25 + 273 = 298K

Using PV = nRT

20 × 150 = n × 0.0821 × 298

3000 = 24.4658n

n = 3000/24.4658

n = 122.62

n = 122.6mol

Using the formula, mole = mass/molar mass, to find the mass of H2 gas.

Molar mass of H2 = 1.008(2)

= 2.016g/mol

122.6 = mass/2.016

mass = 122.6 × 2.016

mass = 247.2g.

1) A 45.7 g sample of glass was brought to thermal equilibrium with boiling water and then transferred to 250.0 g of water that was at 22.5 °C. This combination reached thermal equilibrium at 24.2 °C. What is the specific heat capacity of glass?

2) What mass of silver at 100.0 °C, when added to 150.0 g of water at 21.0 °C, would raise the water’s temperature to 24.0 °C ?

3) The molar heat of fusion of H2O is 6.1 kJ/mole. What amount of energy would be needed to melt 376 g of ice at 0.0 °C?

Answers

1) A 45.7 g sample of glass was brought to thermal equilibrium with boiling water and then transferred to 250.0 g of water that was at 22.5 °C. This combination reached thermal equilibrium at 24.2 °C. What is the specific heat capacity of glass?

2) What mass of silver at 100.0 °C, when added to 150.0 g of water at 21.0 °C, would raise the water’s temperature to 24.0 °C ?

3) The molar heat of fusion of H2O is 6.1 kJ/mole. What amount of energy would be needed to melt 376 g of ice at 0.0 °C?

If an atom of Phosphorous has 17 neutrons, what is its mass number?
a) 31
b) 32
c) 15
D) 17

Answers

Mass number = number of protons + number of neutrons

The number of protons in the nucleus of an atom of phosphorus is equal to the atomic number of phosphorus, which is 15. If an atom of phosphorus has 17 neutrons, then the mass number would be 15 protons + 17 neutrons = 32. Thus, the correct answer choice here is B.

According to the Law of Conservation of Energy, energy ______.

Answers

Energy cannot be created or destroyed, but transferred from one object to another or transformed from one object into another






The air pressure inside a balloon is 0.783 atm. What is this pressure in mmHg?
Do not include units in your answer.

Answers

Answer:The pressure in mmHg is 59.Explanation:Given data:Pressure of air inside balloon = 0.78 atmPressure in mmHg = ?

Answer:

It is the same it does not change

Explanation:

Explain how the cardiovascular system helps your body function

Answers

Answer:

    The blood circulatory system (cardiovascular system) delivers nutrients and oxygen to all cells in the body. It consists of the heart and the blood vessels running through the entire body. The arteries carry blood away from the heart; the veins carry it back to the heart.

Explanation:

You're welcome!

Stay Safe!

The element cobalt displays many similarities to the element iron and is also attracted to magnets. Based on this information, is it likely that cobalt forms magnetic domains? Explain your answer.​

Answers

In ferromagnetic materials, smaller groups of atoms band together into areas called domains, in which all the electrons have the same magnetic orientation. That's why you can magnetize them. See how it works in this tutorial.

In ferromagnetic materials, smaller groups of atoms band together into areas called domains, in which all the electrons have the same magnetic orientation. That's why you can magnetize them.

What is the meaning of magnetic domains?

A portion of a ferromagnetic material where the magnetic moments are aligned with one another because of interactions between molecules or atoms.

In ferromagnetic materials, the atoms form structures called domains.

A domain is a region inside of a material where groups of magnetic moments naturally align in the same direction.

There can be numerous domains within an object.

Learn more about magnetic domains here:

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water is at 0 degrees celsius if we continue to remove energy from the water what phase changes would occur

Answers

Answer:

Solid/freezing

Explanation:

Solid has the least energy of all of the phase changes and the more energy is lost the colder its gets then water turns into a solid called ice hope i helped!

4.6 moles of a gas are at a temperature of 325 K and a volume of 96.8 L, what is the pressure of the ga

Answers

Answer:

1.3 atm

Explanation:

Apply the ideal gas law: PV = nRT

Since we need to find the pressure, solve for pressure:

P = nRT / V

Plug in our given values of n = 4.6 moles, R = 0.08206 (ideal gas law constant using atm), T = 325 K, and V = 96.8 L:

P = 4.6(0.08206)(325) / 96.8 = 1.267 atm -> 1.3 atm (two significant figures)

A student collects 25 mL of gas at 0.98 bar. What volume would this gas occupy at 1.013 bar? * 3 points 25.8 mL 24.2 mL .09 mL 34.7 mL

Answers

Answer:

24.2 mL.

Explanation:

Assuming constant temperature, we can solve this problem using Boyle's law, which states:

P₁V₁=P₂V₂

Where:

P₁ = 0.98 barV₁ = 25 mLP₂ = 1.013 barV₂ = ?

We input the data:

0.98 bar * 25 mL = 1.013 bar * V₂

And solve for V₂:

V₂ = 24.18 mL

The closest option is the second one: 24.2 mL.

Melatonin has the chemical formula C13H16N2O2. Less than 10 milligrams(0.01g) Convert the melatonin to moles

Answers

Answer: There are 0.000043 moles of melatonin.

Explanation:

According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number [tex]6.023\times 10^{23}[/tex] of particles.

To calculate the moles, we use the equation:

[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text {Molar mass}}[/tex]

given mass = 10 mg = 0.01 g

molar mass of [tex]C_{13}H_{16}N_2O_2[/tex] = 232.28 g

[tex]{\text {moles of melatonin}}=\frac{0.01g}{232.28g/mol}=0.000043moles[/tex]

Thus there are 0.000043 moles of melatonin

Please help me with 1,2,3,4,5,6

Answers

Answer:

1a 2b 3c 4d 5c 6c that is the answer to your quesrion i believe

If you have a car that gets 30 miles to the gallon and fuel currently costs $2.60 a gallon, how many miles can you drive if you have 5$ worth of fuel?

Answers

Answer:

57.7 miles.

Explanation:

Hello there!

In this case, according to the given information, it is possible to set up the initial miles-cost ratio as shown below:

[tex]\frac{30mi}{\$2.60}[/tex]

Thus, we can find the the driven miles with $5 by multiplying as follows:

[tex]\frac{30mi}{\$2.60} *\$5\\\\=57.7mi[/tex]

Best regards!

The miles' the car can run with the fuel cost $5 has been 57.69 miles.

The given car run for a 30 miles by 1 gallon of the fuel. The given cost of fuel has been $2.60. Thus, for 30 miles, the cost of fuel has been driven to be $2.60.

The miles that can be driven by the car with $5 has been given by unitary method. The expression has been driven as:

[tex]\$2.60=30\;\rm miles\\\$5=\dfrac{30}{2.60}\;\times\;5\;miles\\\$5=57.69\;miles[/tex]

The miles' the car can run with the fuel cost $5 has been 57.69 miles.

For more information about unitary method, refer to the link:

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How many grams of H2O would be made from 7.9 moles of H2? (Round to one decimal place)

Answers

Answer:

2.01588 grams

Explanation:

Write the expressions for the equilibrium constants of the reactions below.

a. N2 + 3H2 ⇌ 2NH3

b. Br2 + H2 ⇌ 2HBr

c. CO + H2O ⇌ H2 + CO2

Answers

In general, for a given chemical reaction in equilibrium

[tex]aA + bB \rightleftharpoons cC + dD[/tex]

the equilibrium constant, Keq, will be

[tex]K_{eq}=\frac{\mathrm{[C]^c}[D]^d}{\mathrm{[A]^a[B]^b}}.[/tex]

Usually, only aqueous and gaseous species are included in the equilibrium constant; the concentration of any pure solid or liquid is omitted. While the states of the reactants and products in the reactions for this problem aren't given, these three particular reactions all happen to be ones where they can (and, in fact, do) occur where all the species are in the gaseous state. So, all the reactants and product(s) are included in the equilibrium constants below, but this will not always be the case.

a.

[tex]K_{eq}=\frac{\mathrm{[NH_3]^2}}{\mathrm{[N_2][H_2]^3}}[/tex]

b.

[tex]K_{eq}=\frac{\mathrm{[HBr]^2}}{\mathrm{[Br][H_2]}}[/tex]

c.

[tex]K_{eq}=\frac{\mathrm{[H_2][CO_2}]}{\mathrm{[CO][H_2O]}}[/tex]

The equilibrium constant has to do with the value that shows the extent to which reactants are converted into products.

What is equilibrium constant?

The term equilibrium constant has to do with the value that shows the extent to which reactants are converted into products.

The following are the expressions for the equillibrium constant of each reaction;

[tex]K = [NH3]^2/[N2] [H2]^3[/tex][tex]K = [HBr]^2/[Br2] [H2][/tex][tex]K= [H2] [CO2]/[CO] [H2O][/tex]

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A Pitot-static probe is used to measure the speed of an aircraft flying at 3000 m. If the differential pressure reading is 3100 N/m2, determine the speed of the aircraft in m/s. The density of air at an altitude of 3000 m is 0.909 kg/m3. The speed of the aircraft is km/h.

Answers

Answer:

82.59 m/s or 297.324 km/h

Explanation:

From the question,

Applying

V = √[2(P'/ρ)].................. Equation 1 ( From

Where V = Speed of the aircraft, Differential Pressure of the air craft, ρ = Density of air at an altitude of 3000 m.

Given: P' = 3100 N/m², ρ = 0.909 kg/m³

Substitute into equation 1

V = √[2(3100/0.909)]

V = √(2×3410.34)

V = √(6820.68)

V = 82.59 m/s

V = 297.324 km/h

Hence the speed of the aircraft is  82.59 m/s or 297.324 km/h

structure of periodic table explain​

Answers

Explanation:

Elements are arranged from left to right and top to bottom in order of increasing atomic number. ... The number of electrons in a period increases as one moves down the periodic table; therefore, as the energy level of the atom increases, the number of energy sub-levels per energy level increases.

The density of a gas was found to be 19.1 g/L at 2.25 atm and 19.3°C. What is the molar mass of
the gas?

Answers

Answer:

Explanation:

Recall that the density of a gas is its mass to volume ratio,  

ρ

=

m

V

. Therefore, if we can determine the mass of some volume of a gas, we will get its density. The density of an unknown gas can used to determine its molar mass and thereby assist in its identification. The ideal gas law, PV = nRT, provides us with a means of deriving such a mathematical formula to relate the density of a gas to its volume

A geologist is attempting to date a layer of sedimentary rock. He performs radioactive dating using uranium-235, which has a half-life of 703 million years. He determines that the uranium-235 has undergone 3 half-lives. Approximately how old is the rock?

710 billion years

2.11 billion years

710 million years

235 million years

2.11 million years

none of the above

Answers

Answer:

2.11 billion years.

Explanation:

I hope this helps! Have a great rest of your day!

It’s 2.11 billion years

What is the molality of a solution that contains 435 grams of Fe(ClO 2 3)3 , in 750.0 g of solvent?

Answers

Answer:

2.24 M

Explanation:

Molality is a measure of molar concentration of a solution and it can be calculated using the formula;

Molality = mole of solute ÷ kg of solvent

To calculate the number of moles present in the solute, we use the formula;

mole = mass ÷ molar mass

Molar mass of Fe(ClO2)3 = 56 + {35.5 + 16(2)}3

= 56 + (35.5 + 32)3

= 56 + (67.5)3

= 56 + 202.5

= 258.5g/mol

mole = 435/258.5

mole of Fe(ClO2)3 = 1.68mol

750g of solvent = 750/1000 = 0.750kg of solvent

Molality of the solution is thus: 1.68/0.750

Molality = 2.24 M.

What coefficients would balance the following equation?

__Al + __O2 → __Al2O3
A. 2Al + 3O2 → 1Al2O3
B. 2Al + 3O2 → 2Al2O3
C. 3Al + 3O2 → 2Al2O3
D. 4Al + 3O2 → 2Al2O3

Answers

4Al + 3O2 —> 2AL2O3
Answer is D

The driver of an 1,840 kg race car applies the brake to come to a complete stop. If the car
accelerates at -3.4 m/s2 what is the net force acting on the race car?

a) -541 N

b) 630 N

c) -1.8 N

d) -6,256 N

Answers

The answer is A sorry if it’s wrong

Push and pull subjected to an object is called force and is given in newtons. The net force acting on the race car is -6,256 N.

What is force?

Force is the product of the mass of the object in kg and the acceleration in meters per second square. It is given by the formula:

[tex]\rm F = m \times a[/tex]

Given,

Mass of the race car = 1,840 kg

Acceleration of the race car = -3.4

Substituting values in the above equation:

[tex]\begin{aligned} \rm F &= \rm m \times a \\\\&= 1840 \times -3.4\\\\&= -6,256 \;\rm N \end{aligned}[/tex]

Therefore, option D. -6,256 N is the force acting on the car.

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The measured amount of product obtained from a chemical reaction
is the.

Answers

The amount of product actually obtained in a chemical reaction. theoretical yield: The amount of product that could possibly be produced in a given reaction, calculated according to the starting amount of the limiting reagent.

Please help me with this homework

Answers

sorry can’t answer but make sure to report links

An unknown compound in the lab is either LiOH, CaF2, or LiF. If the sample has a mass of 260 grams and contains 3.33 moles, what is the identity of the compound?​

Answers

Answer:

CaF2

Explanation:

1 mole of CaF2 = 78.0748064 grams

78 times 3.33= 259.74

the others multiplied were nowhere near 260 grams either

which is BEST used to describe a chemical reaction that also produces a change in heat?

a. exothermic reaction
b. chemical reaction
c. thermochemical reaction
d. nuclear reaction

will give brainliest

Answers

Answer:

I think it's thermochemical reaction and sorry if it's wrong

All you need to know about CO2?

Answers

Answer:

Carbon is an element that's found all over the world and in every living thing. Oxygen is another element that's in the air we breathe. When carbon and oxygen bond together, they form a colorless, odorless gas called carbon dioxide, which is a heat-trapping greenhouse gas. Whenever we burn fossil fuels such as coal, oil, and natural gas—whether it's to drive our cars, use electricity, or make products—we are producing carbon dioxide.

The atmosphere isn't the only part of the Earth that has carbon. The oceans store large amounts of carbon, and so do plants, soil, and deposits of coal, oil, and natural gas deep underground. Carbon naturally moves from one part of the Earth to another through the carbon cycle. But right now, by burning fossil fuels, people are adding carbon to the atmosphere (in the form of carbon dioxide) faster than natural processes can remove it. That's why the amount of carbon dioxide in the atmosphere is increasing, which is causing global climate change.

Explanation:

if you push the head of a nail against your skin and then push the point of the same nail against your skin with the same force the point of the nail may pierce your skin while the head of the nail will not why is that

Answers

Answer:

Sure I'll help you!

Explanation:

The head of the nail is flat and isn't sharp enough to cut anything, If you stab someone with a sword then hit them with a shield would it have the same effect? Of course not.

Is a mixture with the same composition throughout


Answers

Answer:

A homogeneous mixture

Explanation:

A homogeneous mixture has the same composition throughout

Fractional distilation of liquid air usually produces nitrogen and oxygen as major products . Substance used to remove carbon iv oxide from air before its changed to liquid

Answers

Answer:

Caustic soda

Explanation:

The fractional distillation of air is carried out on liquid air. Before air is liquified, the carbon dioxide content of air is removed using caustic soda. The air is then compressed to a pressure of about 200 atm, sudden expansion of the gas leads to cooling. The process continues until air becomes liquid at  -200°C.

Fractional distillation of liquid air usually produces nitrogen and oxygen as major products. nitrogen in obtained first since it has a lower boiling point than oxygen. The gases are then dried, compressed and stored in cylinders.

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