One of two lorries is half the weight of the other, but is moving at twice the speed of the other. Which of the lorries has more kinetic energy?

Need urgently help and please someone offer to help me with this exercise.. Thank you ^-^​

Answer:

the reaction is a physical reaction and it is exothermic as it releases heat to the sorrounding

Explanation:

because the mass of paper burnt is equal to the mass of products which are ashes

Answer:

i think it's A

because if there is more friction then it will create more hindrance for the current to flow which is ultimately called resistance .

Answer:

D, valence electrons.

Explanation:

Since the number of shells are dependent on the number of valence electrons, which determines the period of the element. Because each shell of an element holds a total of 8 valence electrons, there is a chemical association that is being made between the outer electrons and the atom.

Answer:

The correct answer is D. Its valence electrons.

Explanation:

The valence electrons are those that participate in reactions with other elements.  The fewer valence electrons that an element has, the less stable it becomes; an element with a full valence electron shell does not frequently interact with other elements.  In this way, the valence electrons determine the chemical properties of an element.

Hope this helps!

Answer:

Ffriction = 90 N

coefficient = 0.3

Explanation:

First, note that the sum of all the forces in the x directions equals the mass multiplied by the acceleration in the x direction.

assuming the direction of the pulling force is positive,

243 N - Ffriction = m * a

m= 30.6 kg

a= 5 m/s/s

Ffriction= 243 - m*a

Ffriction= 243 - (30.6)(5)

Ffriction=90 N

The force of friction is equal to the coefficient of friction multiplied by the normal force on the object. Because the pulling force is completely horizontal, the normal force of the object is equal to its weight, which is m * g, or (30.6 kg)(9.8 m/s/s) = 299.88 N

Ffriction = coefficient * Fnormal

90 = coefficient * 299.88

coefficient = 0.3

Answer:

d is the fastest and c is the slowest

Explanation:

physics

Answer:

Neptune will move the fastest

Mercury will move the slowest

Explanation: Because what ever is closer to a object will move the slowest and something further away will have to go faster to keep up with the object that is closer.

Answer:

9896

Explanation:

multiply them all together

Answer:

Thank you ☺️☺️

Answer:

0.4 g/cm^3

Explanation:

As density=m/v

                =2.4/6

                =0.4g/cm^3

Answer:

louder sound.

Explanation:

The amplitude of a sound wave determines its loudness or volume. A larger amplitude means a louder sound

Answer:

0.10 m

Explanation:

Given in the x direction:

v₀ = 0.24 m/s

a = 0 m/s²

t = 0.42 s

Find: Δx

Δx = v₀ t + ½ at²

Δx = (0.24 m/s) (0.42 s) + ½ (0 m/s²) (0.42 s)²

Δx ≈ 0.10 m

The distance from the table with the horizontal velocity of 0.24 m/s and time t is 0.42 s is 0.10m.

Velocity is defined as the rate of displacement per unit time. It equals the speed along with the direction. Velocity is the vector quantity as it has both magnitude and direction.

The velocity can be classified as instantaneous velocity and average velocity. Average velocity is obtained by the ratio of total displacement to total time. The unit of velocity is m/s.

From the given,

Initial velocity (u) = 0.24 m/s

time = 0.43 s

acc (a) = 0

distance (s) =?

By using the equation of motion:

s = ut + 1/2 (at²)

 = 0.24×0.42 + (0×0.42×0.42)/2

 = 0.10 + 0

s = 0.10 m

Thus, the distance traveled from the table is 0.10 m.

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Answer:

The ball will continue to move at a constant speed forever until another force stops it.

Explanation:

Newton's first law of motion can be seen as a law of inertia. It explains that an object at rest or in a state of uniform motion will remain in that state unless it is acted upon by an external force.

Following the above, when the ball is thrown into space, the ball will continue to move with the velocity with which it was thrown until it comes in contact with another object that stops it. If this does not happen, it will continue to drift forever at that velocity.

Answer:

A- James Braid

Explanation:

e2020

When using the right-hand rule to determine the direction of the magnetic force on a charge, the thumb is in the direction of the magnetic field.

The right-hand thumb rule is the method to recognize that there is only one velocity, which is symbolized by the thumb. There are a lot of field lines, which are symbolized by the fingers.

The force is directed in the direction in which you would press your palm. The force acting on a negative charge is the polar opposite of that acting on a positive charge.

A pure magnetic field will not accelerate a charged particle in a single direction since the force is always perpendicular to the velocity vector, but it will create circular or helical motion

It's worth noting that a magnetic field has no effect on a static electric charge. These two findings are consistent with the rule that magnetic fields are polarized.

Hence using the right-hand rule to determine the direction of the magnetic force on a charge, the thumb is in the direction of the magnetic field.

To learn more about the right-hand thumb rule refer to the link;

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Answer:

D, thumb

Explanation:

edge 2022

Answer:

t = 9.38 seconds

Explanation:

Given that,

Initial speed of the airplane, u = 0 (at rest)

Final speed of the airplane, v = 77 m/s

Acceleration of the airplane, a = 8.2 m/s²

We need to find the time required for the airplane to accelerate. The formula of acceleration is given by :

[tex]a=\dfrac{v-u}{t}\\\\t=\dfrac{v-u}{a}\\\\t=\dfrac{77-0}{8.2}\\\\t=9.38\ s[/tex]

So, the time taken by the airplane is 9.38 seconds.

Answer:

we have sung a song .change into simple present tense

The word from the list that best fits the definition increases the number of sunspots that can lead to warmer climates.

Sunspots are transitory spots on the Sun's photosphere that appear to be deeper than the surrounding areas.

They are zones of reduced surface heat caused by magnetic field flux concentrations that prevent convection.

Sunspots usually form in pairs with opposite magnetic polarities. This has an impact on the temperature on Earth, as well as radio reaction. The Earth would presumably be colder if sunspots didn't exist.

When sunspots form, they produce an increase in UV radiation that radiates from the sunspots' outer ring as they approach Earth.

This increase in UV radiation has an impact on the chemistry of the outer environment as well as the Earth's energy balance.

The idea that sunspots have an impact on Earth's ecology is still controversial, although it does exist.

Hence the words from the list that best fits the definition increase the number of sunspots that can lead to warmer climates.

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The strength of the electric field will be 0.75 NC⁻¹.

The strength of the electric field is the ratio of electric force per unit charge. Its unit is NC⁻¹.

The given data in the problem is;

q is the positive charge = 6.0 × 10-4 C

F is the electric force of 4.5 × 10-4 N

E is the electric field intensity=?

The electric force is given by;

[tex]\rm F= q \times E \\\\ \rm E= \frac{F}{q} \\\\ \rm E= \frac{4.5 \times 10^4}{6 \times 10^{-4}} \\\\ \rm E=0.75 \ NC^{-1}[/tex]

Hence the strength of the electric field will be 0.75 NC⁻¹.

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The mystery element on the periodic table that have melting point of 725.05c , that is malleable, good conductor of heat is Barium.

Periodic table is the table that shows the classification of elements into groups and periods which classify them base on their unique and comon characteristics within each group.

Therefore, The mystery element on the periodic table that have melting point of 725.05c , that is malleable, good conductor of heat is Barium.

Learn more about periodic table below.

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Answer:

the average speed is ... 280 m / 8.00 s = 35 m/s

the initial speed is zero (rest), so the final speed (take off) is

... ave = (init + fin) / 2 ... 35 = (0 + f) / 2 ... f = 70 m/s

Explanation:

Answer:

I = 7.826A

R = 29.38 Ω

Explanation:

First, let us find the current of the microwave.

Let us use the below formula for that.

Power = Voltage × Current

Current = Power ÷ Voltage

             = 1800w ÷ 230v

             = 7.826 A

And now let us find the resistance using the below formula.

Voltage = Current × Resistance

Resistance = Voltage ÷ Current

                   = 230V  ÷ 7.826A

                    = 29.38 Ω

Answer:

4.6 billion years

Explanation:

Option D, 1.95 cm

1.8+2.1=3.9/2 = 1.95

C. Disregard a goal if you don’t achieve it

Answer: A. Disregard a goad if you don't achieve it.

Explanation:

The Explanation is if you don't achieve the goal that is not right so your job is to disregard the goal.