a car starts from 21 m/s and gets up to a velocity of 30m/s in a time of 36
seconds. what is the acceleration of the car

Answer:

128J

Explanation:

K.E = MV² ÷ 2

K.E = 16 × 4² ÷ 2

K.E = 16 × 16 ÷ 2

K.E = 256 ÷ 2

K.E = 128J

:. it's kinetic energy is 128Joules(J)

Answer:

Zero

Explanation:

When it reaches max height, it stops and begins to fall back down....at this point the velocity = 0

Answer:

Rest: cease work or movement in order to relax, sleep, or recover strength.

Motion: the action or process of moving or being moved.

Heredity has an impact on personal health, but environmental factors are important as well, the given statement is True.

Heredity represents the transfer of traits from one generation to the next generation. It has an impact on personal heath as the health condition of an individual is goverend by the protein products that control the growth and development of the organism.

For instance, the presence of hazardous substances in air, water, and soil that cause pollution directly have harmful impact on the health of individuals.

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Answer:

B. The volume of an object is the same as the

weight of that object.

Explanation:

Every thing else is right and that one is wrong.

Answer:

B. The volume of an object is the same as the

weight of that object.

Explanation:

i hope it helps

Three different alloys used in home are brass, bronze and copper. Brass and bronze are used for utensils and copper is used in the electrical circuits.  

Alloys are the homogeneous mixture of metal mixed with metal or non metal. These alloys can't be separated by physical methods.            

The alloy brass and bronze are used for utensils and copper is used in the electrical circuits.                                                                                                                        

The properties of the alloys make it suitable for that application is the electrical conductivity and their melting point.

Brass and Bronze are bad conductors of electricity. On the other side, copper is used in electrical circuits.

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Answer:

13.33 gm/cm^3

Explanation:

Displacement of liquid =

 34 gm /  2.3 gm/cm^3 = 14.783  cm^3

so the VOLUME of the object is 14.783 cm^3

  density  =  197 gm / 14.783 cm^3 = 13.33  gm/cm^3

The slowing force of friction due to ice on the given sled on the ice is determined as 40 N.

The slowing force of friction due to ice can be determined by using Newton's second law of motion as follows;

F = ma

where;

F = 100 x 0.4

F = 40 N

Thus, the slowing force of friction due to ice on the given sled on the ice is determined as 40 N.

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Answer:

Probably cubic centimeters    cm^3

Explanation:

Answer:

2600 cubic centimeters

Explanation:

Volume of the edible fruit is equal to :

⇒ Volume (fruit) - Volume (seed)

⇒ 4/3π(3r)³ - 4/3πr³

⇒ 27 x 4/3πr³ - 4/3πr³

⇒ 100 (27 - 1)

⇒ 2600 cubic centimeters

The volume of the edible fruit, rounded to the nearest cubic centimeter, is approximately 1188 cubic centimeters.

Given that the volume of the seed is 100 cubic centimeters, we can use the formula for the volume of a sphere to relate the radius and volume:

V(seed) = (4/3)πr³

100 = (4/3)πr³

Next, we can determine the radius of the fruit by multiplying the radius of the seed by 3:

R(fruit) = 3r

V(fruit) = (4/3)π(R(fruit)³ - r³)

V(fruit) = (4/3)π((3r)³ - r³)

V(fruit) = (4/3)π(27r³ - r³)

V(fruit) = (4/3)π(26r)

Now, substitute the value of r from the first equation into the expression for V(fruit):

V(fruit) = (4/3)π(26 × ∛(100/(4/3)π))

V(fruit) = 1188 cubic centimeters

Therefore, the volume of the edible fruit, rounded to the nearest cubic centimeter, is approximately 1188 cubic centimeters.

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Density can be found when mass and volume is known. The density of 5 liter of water is 1000kg/m³.

The density ρ of any substance is the ratio of mass m and its volume V.

ρ = m/V

Given is the mass of water as 5 kg and the volume is 5 liter.

as, 1 L = 10−³m³

So, 5 L = 5×10−³m³

Then, density would be

ρ = 5kg / 5×10−³m³

ρ = 1000 kg/m³

Thus, the density of 5l of water is 1000kg/m³.

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Answer:

-19.39

Explanation:

The displacement of the dolphin in that time will be34.2826m.

To find the displacement of the dolphin, we can use the equations of motion. The displacement can be calculated using the following equation:

d = v initial(t) + 1/2at²

We are given that,

Acceleration (a) = -1.77 m/s² (negative because it's decelerating)

Time (t) = 3.33 s

Final velocity (final v final) = -8.77 m/s

To find the initial velocity, we can use another kinematic equation:

final= Vinitial + Vfinal =v initial +at

Now, plug in the values:

v initial= − 8.77m/s − ( −1.77m/s²)× 3.33s

v initial=−8.77m/s−(−1.77m/s²)×3.33s

v initial =- 2.8769m/s

Now that we have the initial velocity, we can find the displacement using the first equation:

d = v initial(t) + 1/2 at²

d = - 2.8769m/s  × 3.33 s + 1/2(-1.77 m/s²) × 3.33s

d = - 34.2826m

The displacement of the dolphin in that time is - 34.2826m. The negative sign indicates that the displacement is in the opposite direction of the initial velocity.

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Answer:

Decreasing temperatures

Explanation:

Indicators of climate change :

Hence, option 1 which gives decrease in temperature is not a climate change indicator.

Answer:

Decreasing tempertures

Explanation:

Answer:

21.6 kN

Explanation:

F = m * a

F = 54 000 * .4  = 21600 N

Answer:54,000 N

Explanation:

The correct statements about electric field lines are they point away from a positive charge, they point toward a negative charge and they never cross.

An electric field line is an imaginary line drawn through a region of empty space so that its tangent at any point on the line represents the direction of the electric field vector.

The electric field lines starts from the positive charge and terminates at the negative charge. These lines never intersect each other.

Thus, the correct statements about electric field lines are they point away from a positive charge, they point toward a negative charge and they never cross.

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Answer:

emotions

Explanation:

emotions are how you feel and can happen any time

Hope it helps <333

Answer:

emotions affect your body and how you feel

Answer:

1. False

some metals are ferromagnetic

2.True

3. True

4. True

5. False

The strength of electromagnetic can be increased by increasing the number of wire around it

#1

Very few like Fe,Ni ,Co are ferromagnetic.

#2

True

#3

True

#4

It's Orsterd experiment conclusion

#5

Because

[tex]\sf B=\mu_o nI[/tex]

If you decrease no of turns magnetic force decreases

The only option if Ellis wants to stick to one standard serving of alcohol is a 1.5 ounce shot of liquor with 40% alcohol.

In the United States, one standard serving of alcohol contains roughly 14 grams of pure alcohol, which is found in:

Thus, the only option if Ellis wants to stick to one standard serving of alcohol is a 1.5 ounce shot of liquor with 40% alcohol.

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This question involves the concepts of induced emf and magnetic field.

The wire has to move at a speed of "20 m/s".

The emf induced in a current carrying conductor when it passes through a magnetic field is given by the following formula:

[tex]E = vBl\\\\v=\frac{E}{Bl}[/tex]

where,

Therefore,

[tex]v=\frac{10\ volts}{(2.5\ T)(0.2\ m)}[/tex]

v = 20 m/s

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Answer:

option b

Explanation:

when the two forces act in opposite directions there effective magnitude decreases.

Answer:

b. difference between two factors

Explanation:

When two forces act in the opposite directions, the net force is the difference between them.

Answer:

Work = Force × distance

= m × g × d

= 12 × 9.8 × 0.5

= 58.8 N

If in the case , you need any help pleasee leg me know! [ you'll have to pay btw]

Answer:

I drive my car at a speed of 30m/s is speed

I drive my car at a speed of 30m/s northward is velocity

The power developed by the student is 756.9 J/s and remains the same if the student takes the same time to climb the stairs when climbing it in two's and three's.

Power is the rate at work is done.

Work done = 65.5 × 10 × (18 × 0.165) = 1945.35 J

Power = 1945.35/2.57 = 756.9 J/s

If the student climbed the steps in two or three at a time, the power does not change if the time remains the same.

The time required to convert the Big Mac meal from McDonalds = 4 853 440/756.9

Time required = 6412.26 seconds

Therefore, from the power developed by the student, it will take him 6412.26 seconds to convert all the energy in a Big Mac meal.

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Answer:

560 m/s

Explanation:

Given,

Frequency ( f ) = 80 hz

Wavelength ( λ ) = 7.0 m = 7m

To find : Velocity ( v )

Formula : -

v = f λ

v = 80 x 7

v = 560 m/s

Hence, the velocity of the wave is 560 m/s.

Answer:

Eddy Currents

Explanation:

Eddy currents are produced when a metal is moving through a magnetic field

Answer:

Barred Spiral.

Answer:

a Internal core

b The lower mantle

c Butter dough

d Earth rocks

Answer:

time taken.

Explanation:

F = ma

F = m × (v - u) / t

F = mv - mu / t

mv - mu = change in momentum

The volume of the diluted (i.e the new) solution given the data is 147 mL

M₁V₁ = M₂V₂

1.75 × 84 = 1 × V₂

V₂ = 147 mL

Thus, the volume of the new solution is 147 mL

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