explain how an axe is used as a wedge to cut a piece of wood

In order to form a hypothesis that would illustrate the relationship between mass and kinetic energy, we first need to understand what kinetic energy and mass are and how they are related. Kinetic energy is the energy that an object possesses due to its motion, and is given by the formula KE = 0.5mv², where m is the mass of the object and v is its velocity. Mass, on the other hand, is a measure of the amount of matter in an object.

The relationship between mass and kinetic energy is direct, meaning that as mass increases, so does kinetic energy, provided that velocity remains constant. Similarly, if velocity increases, then kinetic energy will increase as well, provided that mass remains constant.

The hypothesis that illustrates this relationship can be stated as follows:If the mass of an object is increased, then the kinetic energy of the object will also increase, because kinetic energy is directly proportional to mass, assuming velocity remains constant.In other words, if the mass of an object is doubled, then its kinetic energy will also double, assuming that its velocity remains constant. This hypothesis can be tested through experiments that involve measuring the kinetic energy of objects with different masses, but with the same velocity.

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If the mass of an object increases, then its kinetic energy will increase proportionally because mass and kinetic energy have a linear relationship when graphed.

Answer:

the correct answer is 10 wires

Explanation:

So you divide 10x the seconds then you know that 10x10 is 100 and then the answer becomes 10.

Kinetic energy of any object is always positive. This should be  hypothesis for any experiment.

A hypothesis is a theory put up to explain a phenomenon. A hypothesis must be testable according to the scientific method for it to be considered a scientific hypothesis.

Scientific hypotheses are typically based on prior observations that cannot be adequately explained by the current body of knowledge. Despite the frequent confusion between the terms "hypothesis" and "theory," a scientific hypothesis differs from a scientific theory.

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The vertical component of velocity here is 0.509 m/s. Then the vertical distance in 1 s is being 0.509 m. Then the potential energy is 174.5 J.

Potential energy of an object is generated by virtue of its position from a height h from the ground. It is related to the mass and gravity and the height h as follows:

p = mgh.

The velocity of the child = 6.5 m/s

vertical component of v = 6.5 sin 4.5° = 0.509 m/s

thus, vertical distance or height moved in 1 s  = 0.509 m

mass of the child = 35 kg

then potential energy p = 35 kg× 0.509 m/s × 9.8 m/s² = 174.5 J

Therefore, the potential energy being lost will be 174.5 J.

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the value of ax, given the data from the question is 4.55 m/s²

From the question given above, the following data were obtained:

s = ½at²

s = ½ × ax × 2²

s = 2ax

v = at

v = ax × 2

v = 2ax

Remaining distance = velocity × remaining time

Remaining time = 12 - 2 = 10

Remaining distance = 2ax × 10

Remaining distance = 20ax

Total distance = Distance for first 2 s + Remainng distance

100 = 2ax + 20ax

100 = 22ax

Divide both sides by 22

ax = 100 / 22

ax = 4.55 m/s²

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Answer:

true

Explanation:

Answer: True

Explanation:

1. The height of the image is 0.287 m.

2. The wavelength of the light is 563 nm.

1. The image distance, denoted as `i`, is determined by the lens formula: `1/f = 1/o + 1/i`, where `f` represents the focal length, `o` is the object distance, and `i` represents the image distance. Given `f = 28.3 cm` and `o = 1.78 m`, we need to convert the object distance from meters to centimeters: `o = 1.78 m = 178 cm`. Therefore, the image distance is calculated as follows:

i = (1/f - 1/o)^-1 = (1/28.3 - 1/178)^-1 = 24.53 cm.

The image height, denoted as `h'`, can be determined using the object height `h` and the magnification `m` relationship: `h' = m * h`. The magnification `m` is given by `m = -i/o`, where the negative sign indicates an inverted image. Thus,

m = -i/o = -(24.53 cm)/(178 cm) = -0.138.

The image height `h'` is obtained by multiplying `h` by `m`: `h' = m * h`, where `h = 2.08 m`. Therefore,

h' = (-0.138) * 2.08 = -0.287 m.

The negative sign signifies an inverted image. Hence, the height of the image is determined as `0.287 m`, and it is inverted.

2. Bright fringes are observed at angles `theta` satisfying the condition `d sin theta = m lambda`, where `d` represents the spacing between two slits, `m` is an integer indicating the fringe order, and `lambda` denotes the wavelength of light. In this case, given `d = 1/20 mm` and `m = 1`, the angle `theta` corresponding to the first bright fringe is given by `tan theta = x/L`, where `x` represents the separation between two fringes, and `L` is the distance from the grating to the screen. With `x = 27.2 mm` and `L = 2.41 m`, we can calculate:

tan theta = (27.2 mm)/(2.41 m) = 0.01126.

Therefore, `sin theta = tan theta = 0.01126`.

Consequently, the wavelength `lambda` is determined using the formula `lambda = d sin theta / m`, where `d = 1/20 x 10^-3 m`, `sin theta = 0.01126`, and `m = 1`:

lambda = (1/20 x 10^-3 m) x 0.01126 / 1 = 5.63 x 10^-7 m = 563 nm.

In summary:

1. The height of the image is 0.287 m.

2. The wavelength of the light is 563 nm.

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Answer:

Third Law Of Motion.

Explanation:

The law of interaction, the third one, explains that if one body exerts a force on a second body, the second body exerts a force equal in magnitude and opposite in direction on the first body.

a) The impedance of the circuit is 20.62 Ω.

The impedance of a circuit with a resistor, capacitor, and inductor in series can be calculated using the formula Z = sqrt(R^2 + (X_L - X_C)^2), where R is the resistance, X_L is the inductive reactance, and X_C is the capacitive reactance. Plugging in the given values, we get Z = sqrt(20^2 + (2π(125)(0.03) - 1/(2π(125)(0.00005)))^2) ≈ 20.62 Ω.

b) The amplitude of the current in the circuit is 0.485 A.

The amplitude of the current can be calculated using the formula I = V/Z, where V is the amplitude of the voltage and Z is the impedance of the circuit. Plugging in the given values, we get I = 10/20.62 ≈ 0.485 A.

c) The phase constant of the current is -27.18 degrees and it is laggging the source voltage.

The phase constant can be calculated using the formula tan(θ) = (X_L - X_C)/R, where θ is the phase angle, R is the resistance, X_L is the inductive reactance , and X_C is the capacitive reactance. Plugging in the given values, we get θ ≈ -27.18 degrees, which means the current is lagging the voltage.

d) The voltage drops across the resistor, capacitor, and inductor and the source voltage as a function of time are given by V_R = IR, V_C = 1/C ∫i(t) dt, V_L = L di/dt, and V_S = V_m sin(2πft), respectively.

The voltage drop across the resistor is simply the product of the current and the resistance, while the voltage drop across the capacitor is the integral of the current with respect to time divided by the capacitance. Similarly, the voltage drop across the inductor is the product of the inductance and the derivative of the current with respect to time. Finally, the source voltage is given by the sine function of the product of the frequency and time.

e) The power factor of the circuit is 0.942 lagging

The power factor is the cosine of the phase angle between the voltage and the current, and can be calculated using the formula cos(θ) = R/Z. Plugging in the given values, we get cos(-27.18) ≈ 0.942, which means the power factor is 0.942 lagging.

f) The energy used by the resistor in 2.5 s is 6.05 J.

The energy used by the resistor can be calculated using the formula E = P*t = I^2 R t, where P is the power, I is the current, R is the resistance, and t is the time. Plugging in the given values, we get E = (0.485)^2 * 20 * 2.5 ≈ 6.05 J.

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Your neighbor will finish cutting her lawn at 10:00 am, which is one hour after both of you started.

Since your lawn is twice as large as your neighbor's lawn, it takes you a certain amount of time to cut it, which we can analyze to determine when your neighbor will finish cutting her lawn.

You started cutting your lawn at 9:00 am and finished at 11:00 am. This means it took you 2 hours to complete the task. Since your neighbor's lawn is half the size of yours, it will take her half the amount of time to finish cutting her lawn, assuming you both exert the same force using the same self-propelled lawn mower.

To calculate the time it will take your neighbor to cut her lawn, simply divide your time (2 hours) by 2. This gives us 1 hour. Your neighbor started cutting her lawn at the same time you did, 9:00 am, and will take 1 hour to complete the task.

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The statement stands for false, i.e. when an op-amp is used as a comparator, it must operate in the linear region of the op-amp transfer function.

When an op-amp is used as a comparator, it is intentionally operated in the non-linear region of its transfer function. In this mode, the op-amp is used to compare two input voltages and produce a digital output based on their relative magnitudes. The op-amp is designed to rapidly switch between its maximum output levels depending on the input voltage comparison, rather than operate in the linear region where the output voltage would vary continuously.

An op-amp has a transfer function that describes the relationship between its input voltage and output voltage. In the linear region of the transfer function, the output voltage of the op-amp varies linearly with the input voltage. This is the typical operating region when the op-amp is used in amplification circuits.

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A stock tank heater rated at 1500 watts will use 1,29,600 kJ of energy in a 24 hour period.

Given :

We know that

Energy = Power x time

E = P * t

E = 1500 x 24 x 3600

E = 129600000 J ( or 129600 kJ)

Hence, a stock tank heater rated at 1500 watts will use 1,29,600 kJ of energy in a 24 hour period.

The formula that links energy and power is:

Energy = Power x Time.

The unit of energy is the joule, the unit of power is the watt, and the unit of time is the second.

If we know the power in watts of an appliance and how many seconds it is used we can calculate the number of joules of electrical energy which have been converted to sortie other form.

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Answer:

reflection of light is the bending of light from one medium to another

The given statement "The change in electric potential energy (Ub - Ua) represents the work done on a charge by the electric force as it moves from point A to point B" is True because when a charge moves through an electric field, it experiences a force due to the field. This force does work on the charge as it travels from one point to another, which changes its electric potential energy.

Electric potential energy is defined as the work required to move a charge from a reference point to a specific point in an electric field without producing any acceleration. It depends on both the charge and the electric field, and can be positive or negative, depending on the nature of the field and the charge (attractive or repulsive).

The electric potential, also known as voltage, is the electric potential energy per unit charge. It is a scalar quantity, which means it has magnitude but no direction. The difference in electric potential between two points (Vb - Va) is called the potential difference or voltage drop.

The work done by the electric force can be calculated using the formula: W = q(Vb - Va), where W is the work done, q is the charge, and (Vb - Va) is the potential difference between points A and B. This work done is equal to the change in electric potential energy (Ub - Ua) of the charge as it moves from point A to point B.

In summary, the statement is true because the change in electric potential energy (Ub - Ua) of a charge moving through an electric field is equivalent to the work done on the charge by the electric force during its movement from point A to point B. This concept is important in understanding the behavior of charges in electric fields and the energy transfer that occurs between charges and the field.

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The velocity of the canoe is  1.7 m/s.

Momentum in physics is the products of mass and velocity. Now we have to find momentum with the formula; p = mv

a) Initial momentum = (15)8 m/s + 135 = 255 Kgms-1

b) Since momentum is conserved, the total momentum after throwing the anchor is still 255 Kgms-1

c) The final velocity of the boat is obtained from;

255 Kgms-1 = (15Kg + 135 Kg) v

v = 255 Kgms-1/(15Kg + 135 Kg)

v = 1.7 m/s

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Answer:

150 J

Explanation:

Kinetic Energy = 1/2 m v ^2

KE = 1/2 ( 75)(2^2) =  150  kg m^2/s^2 =  150 J

According to conservation of energy, the energy of interacting bodies in a closed system remains constant. The total energy of an isolated system remains constant; it is said to be conserved over a period of time.

Elastic energy is the mechanical implicit energy stored in the configuration of a material or physical system as it's subjected to elastic distortion by work performed upon it. Elastic energy occurs when objects are impermanently compressed, stretched or generally misshaped in any manner.

The mechanical energy is never lost forever , rather it gets converted to thermal energy because of the friction .

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Answer:B

Explanation:

.03 of an hr is 2 mins and if it takes 2 mins to drive 4 miles enter it in pace calulator you are going 120mph so the closest to 120 is 133mph

The kid is breaking the speed limit of 45 miles/hr since he is going at 133.3 miles/hr.

Speed is the ratio of distance travelled to time taken. It is given by:

Speed = distance / time

Since the distance to the mall is 4 miles, the time taken is 0.03 hours, hence the speed is:

Speed = distance / time

Speed = 4 miles / 0.03 hours

Speed = 133.3 miles/hr

Hence the kid is breaking the speed limit of 45 miles/hr since he is going at 133.3 miles/hr.

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Answer:

224 J

Explanation:

The total energy is equal to 450 J and the kinetic energy is equal to 226 J so to find the potential energy you simply subtract the two numbers

7)

The internal angles of a triangle must add up to 180.

The given answer is 64º and we can verify that:

Then, the answer is correct.

Notice that the measurement of 26.0º has three significant figures while the 90º angle is an exact value. Then, the answer must have 3 significant figures too: 64.0º.

8)

The tangent of an angle in a right triangle is the quotient between the side opposite to it and the side adjacent to it.

The tangent of 26º is 0.4877, and the quotient of the lengths of the sides according to the answer, is:

The length of 16.4cm has the correct number of significant figures and matches the value of the tangent. Then, the answer is correct.

9)

Using the Pythagorean Theorem, we should verify that:

To be precise, if the length of the hypotenuse is calculated, the result is 18.249...cm, so it should be rounded down to 18.2cm.

Answer:jhjtfiti

Explanation:

Energy from the battery is changed into electrical energy, which is then used to power the fan and create kinetic energy as the blades spin.

In an electric circuit, energy is changed from one form to another. When a battery is connected to a fan, energy from the battery is changed into electrical energy. This electrical energy is then used to power the fan and create kinetic energy, or energy of motion, as the blades spin.

The energy from the battery is stored in the form of chemical energy. This chemical energy is then changed into electrical energy, which is the energy required to power the fan. This electrical energy passes through the fan, causing the blades to spin. As the blades spin, kinetic energy is generated in the form of the movement of the blades.

The energy in the electric circuit is constantly changing from one form to another. The battery converts chemical energy into electrical energy, and the fan converts electrical energy into kinetic energy. This is the process of energy transformation, which allows us to convert energy from one form to another in order to use it to power appliances.

The electric circuit created by the students is a simple way to illustrate this process of energy transformation. The battery provides the initial source of energy, which is then converted into electrical energy. This electrical energy is then used to power the fan and create kinetic energy. This kinetic energy is then used to move the fan

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Answer:

Energy from the battery is changed into electrical energy, which is then used to power the fan and create kinetic energy as the blades spin.

Connection of an electric circuit

Explanation:

Label the rows as the electron energy levels:

The rows of the periodic table are also known as periods. There are seven periods, and each period corresponds to a particular energy level. You can label them from 1 to 7, starting from the top row.

Label the number of valence electrons in Columns 1, 2, and 13-18:

Columns 1 and 2 are the s-block elements, and they have 1 and 2 valence electrons, respectively. Columns 13-18 are the p-block elements, and they have 3 to 8 valence electrons, respectively. You can label the number of valence electrons in each column.

Label the metals, semi-metals, and non-metals using different colors:

Metals are on the left side of the periodic table, semi-metals are in the middle, and non-metals are on the right side. You can use different colors to label them without obscuring any of the information about different elements.

Label the ion charges for elements in the first 3 rows:

Elements in the first 3 rows of the periodic table have predictable ion charges. The alkali metals (Group 1) have a charge of +1, the alkaline earth metals (Group 2) have a charge of +2, and the elements in Group 13 have a charge of +3. For Groups 15, 16, and 17, the charges are -3, -2, and -1, respectively. The noble gases (Group 18) are unreactive and do not form ions. You can write these charges for each element in their respective positions.

Label the trends for atomic size, ionization energy, and electron affinity:

Atomic size generally decreases from left to right across a period and increases from top to bottom within a group. Ionization energy generally increases from left to right across a period and increases from bottom to top within a group. Electron affinity generally increases from left to right across a period and becomes less negative from top to bottom within a group. You can label these trends on your periodic table as well.

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The required force on the wire at x = 2 m when mass of the particle and shape of the wire are specified is calculated to be 0.6 N.  

The shape of the guide wire of the particle is given as y = - sin(1.5x).

Let us find the velocity by differentiation,

v = dy/dx = 1.5 cos(1.5x)

To find acceleration, let us differentiate velocity again.

a = dv/dt = -2.25 sin(1.5x)

The particle position is given at x = 2m.

So, substitute x = 2 m in the equation of acceleration.

Acceleration a = -2.25 sin(1.5x) = -2.25 sin3° = -2.25(0.05) = 0.12 m/s²

We are asked to find out force on the wire. The equation for force is,

F = m a = 5 × 0.12 = 0.6 N

Thus, the required force on the wire at x = 2 m is calculated to be 0.6 N.

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The major characteristic an organic compound has which an inorganic

compound doesn't  have is the presence of carbon atoms in the molecule.

This helps us to differentiate the compounds into their respective divisions.

Inorganic compounds

Organic compounds

We can observe that inorganic compounds lack carbon atoms which makes

the answer valid.

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Answer:

B and E because yk thats the asnwer

Answer:

i am answering the same question 3rd time

please find the answer in the images attached.

No atomic  model is a picture of an atom but only helps explain the behavior of one

We know that the atom is the smallest particle of a substance that is able to take part in a chemical reaction. We know that in the atom there are certain smaller particles that we can be able to refer to as the subatomic particles.

In this case, we are talking about the different models that we can be able to use to show the atom. None of these models can be said to show the atom exactly but can approximate how the atom behaves.

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The heat given off by the combustion of fossil fuels help produce electrical energy is (B) Thermal energy vaporizes water that spins turbines.

When fossil fuels like coal or natural gas are burned, heat is released into the air, which is used to heat water and create steam. The steam is then used to power turbines, which are linked to electricity-generating generators. The most popular way to generate energy from fossil fuels is through a process called thermal power generation.

Therefore, the correct option is (B).

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