The 4.0 -kg head of an ax is moving at 3 m/s when it strikes a log and penetrates 0.01m into the log. What is the average force the blade exerts on the log?

Answer:

D

Explanation:

The digestive system does all of these functions

all these components (and more) make up the digestive system.

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Answer:

Asteroids and comets have a few things in common. They are both celestial bodies orbiting our Sun, and they both can have unusual orbits, sometimes straying close to Earth or the other planets. They are both “leftovers” — made from materials from the formation of our Solar System 4.5 billion years ago. But there are a few notable differences between these two objects, as well. The biggest difference between comets and asteroids, however, is what they are made of.

While asteroids consist of metals and rocky material, comets are made up of ice, dust, rocky materials and organic compounds. When comets get closer to the Sun, they lose material with each orbit because some of their ice melts and vaporizes. Asteroids typically remain solid, even when near the Sun.

Right now, the majority of asteroids reside in the asteroid belt, a region between the orbits of Mars and Jupiter which may hold millions of space rocks of varying sizes. On the other hand, the majority of comets are in the farthest reaches of our Solar System: either 1. in the Kuiper Belt — a region just outside the orbit of the dwarf planet Pluto that may have millions of icy comets (as well as many icy dwarf planets like Pluto and Eris); or 2. the Oort Cloud, a region where trillions of comets may circle the Sun at huge distances of up to 20 trillion kilometers (13 trillion miles).

Answer:

they are both leftovers materials

Explanation:

think about how the solar system is made the comets and asteroids are both rocks and remains of the solar system

The shape is connected in parallel so;

5.1) Ans;

\( \frac{1}{R} = \frac{1}{R1} + \frac{1}{R2} \\ \frac{1}{R} = \frac{1}{2} + \frac{1}{3} \\ \frac{1}{R} = \frac{3 + 2}{6} = \frac{5}{6} \\ R = \frac{6}{5} = 1.2 \: \: ohm\)

5.2) Ans;

\( \frac{1}{R} = \frac{1}{R1} + \frac{1}{R2} \\ \frac{1}{R} = \frac{1}{8} + \frac{1}{10} \\ \frac{1}{R} = \frac{5 + 4}{40} = \frac{9}{40} \\ R = \frac{40}{9} = 4.4 \: \: ohm\)

I hope I helped you^_^

The wavelength of a 650.00 Hz sound in air at room temperature and pressure, where the velocity of sound is 344 m/s, is approximately 0.529 m.

Sound waves travel through a medium by creating compressions and rarefactions. The wavelength of a sound wave is the distance between two consecutive points that are in phase, such as two compressions or two rarefactions. To calculate the wavelength, we can use the formula: wavelength = velocity of sound / frequency.

In this case, the frequency of the sound is 650.00 Hz, and the velocity of sound in air at room temperature and pressure is 344 m/s. Plugging these values into the formula, we get: wavelength = 344 m/s / 650.00 Hz = 0.529 m.

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Power and time are multiplied to produce the energy transfer. The 378 kJ of energy produced by the 1.4 kW teapot with boiled water. Describe energy. The quantitative property is energy.

What does the word "energy" mean?

The capacity to perform work is energy. Energy is referred to by scientists as the capacity for work. People have figured out how to transform energy from one type to the other and use it to accomplish tasks, making modern civilization possible. Walking, bicycling, driving, rowing, and using stoves all require the usage of energy from people.

Why is energy necessary, and what is it?

Energy is the capacity to carry out work. Energy is referred to by scientists as the capacity for work. People have figured out how to transform energy from one kind to the other and utilize it to accomplish tasks, making modern civilization possible.

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Answer:

The locus of points where the electric field due to these lines is zero is;

Along the line between the lines closer to line#1 than line #2

Explanation:

The charges on the parallel lines #1 and #2 = Positive linear charge

The charge density on line #2, λ₂ = 2 × The charge density on line #1, λ₁

Therefore, we have;

λ₂ = 2 ×  λ₁

Electric field strength, E, is given as follows;

\(E = \dfrac{\lambda}{2\cdot \pi\cdot \epsilon_0\cdot d}\)

Therefore;

\(E_1 = \dfrac{\lambda_1}{2\cdot \pi\cdot \epsilon_0\cdot d}\)

\(E_2 = \dfrac{\lambda_2}{2\cdot \pi\cdot \epsilon_0\cdot d} = 2 \times\dfrac{\lambda_1}{2\cdot \pi\cdot \epsilon_0\cdot d}\)

E₂ = 2·E₁

E₂/2 = E₁

E₂/(2·d) = E₁/d

The strength of the electric field at a given distance from line #2 is 2 times the strength of the electric field from line #1 at the same distance

Therefore the strength of the electric field will be the same at a point twice the distance from line #2 than from line #1 which is a point closer to line #1 than line #2.

The generation, consumption, conversion, and exchange of thermal energy across physical systems is the focus of the thermal engineering field of study known as heat transfer.

Despite mercury having a far higher heat conductivity than water, this doesn't really matter in this situation. Here, H represents the heat transmission. Then, a key factor in this situation is the particular temperatures of these compounds. Compared to mercury, water has a substantially higher specific heat. So, unlike how the temperature of mercury has changed, the temperature of water won't fluctuate as much. Since the mass of both substances is the same, the system's end temperature will be considerably closer to the water's initial temperature.

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Light carries energy in the form of radiant energy.

To find the answer, we need to know about light.

Thus, light carries energy in the form of radiant energy.

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According to product categorization, vehicles can be placed under various categories based on their type, size, purpose, and other features.

Some of the most common categories include:

Passenger cars: This category includes all types of cars, SUVs, and hatchbacks designed for carrying passengers.

Light commercial vehicles: This category includes small trucks, vans, and pickup trucks that are used for carrying goods and equipment.

Heavy commercial vehicles: This category includes large trucks, buses, and other vehicles that are used for transporting goods over long distances.

Two-wheelers: This category includes motorcycles, scooters, and other small, lightweight vehicles designed for individual transportation.

Off-road vehicles: This category includes vehicles designed for off-road driving, such as SUVs, ATVs, and dirt bikes.

Electric vehicles: This category includes vehicles powered by electric motors, such as electric cars, buses, and motorcycles.

Hybrid vehicles: This category includes vehicles that use both electric and internal combustion engines, such as hybrid cars and SUVs.

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Answer:

(if for solving for z)

z= -4.75

Explanation:

az-(b+c) [set equal to zero]

az-(b+c)=0

+(b+c) +(b+c)

az = (b+c) [now substitute the variables]

-8z = (17+21)

-8z = 38 [divide both sides by -8 to get z alone]

z = -4.75

It's crucial to prioritize safety on the road and maintain a safe following distance to avoid such collisions. Remember, the impact speed in a real-life scenario can be significantly higher and have severe consequences.

The impact speed of the car moving at 100 km/h that bumps into the rear of another car traveling in the same direction at 98 km/h can be calculated by finding the relative speed between the two cars.

To find the relative speed, subtract the speed of the slower car (98 km/h) from the speed of the faster car (100 km/h):
\(100 km/h - 98 km/h = 2 km/h\)

Therefore, the relative speed between the two cars is 2 km/h.

However, it's important to note that this relative speed doesn't represent the impact speed. The impact speed will depend on various factors such as the braking efficiency, mass of the cars, and the angle at which the cars collide.

In general, when two cars collide in the same direction, the impact speed is typically less than the relative speed. This is because the collision involves a transfer of kinetic energy, causing the cars to decelerate.

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The boy can get as close as 1.25 meters from the right end of the beam without it falling over.

What is Torque?

Torque is a measure of the twisting force that causes rotation or angular acceleration of an object. It is often referred to as the moment of force or the turning effect of force. Mathematically, torque is defined as the cross product of the force vector and the lever arm vector, where the lever arm is the perpendicular distance from the point .

To solve this problem, we need to find the point at which the torque due to the boy's weight is equal and opposite to the torque due to the weight of the beam. This will be the point at which the beam is in equilibrium and will not fall over.

First, we can calculate the weight of the beam using the formula:

weight = mass x gravity

where the mass is 44 kg and gravity is 9.8 m/s^2 (acceleration due to gravity)

weight of beam = 44 kg x 9.8 m/s^2 = 431.2 N

Next, we can calculate the torque due to the weight of the beam about the left post. Since the beam is symmetric, this torque will be halfway between the two posts, or 2.6 m from the left post. The torque is given by:

torque = force x distance

torque due to beam = 431.2 N x 2.6 m = 1121.1 Nm

Now, we can consider the torque due to the boy's weight. Let's assume that the boy's weight can be considered as acting at the midpoint of his position on the beam. If he is x meters from the right end of the beam, then his position on the beam is 2.6 + x meters from the left post. The torque due to his weight is then:

torque due to boy = force x distance

torque due to boy = 24 kg x 9.8 m/s^2 x (2.6 + x) m = 235.2 (2.6 + x) Nm

For the beam to be in equilibrium, the torque due to the boy's weight must be equal and opposite to the torque due to the weight of the beam:

235.2 (2.6 + x) = 1121.1

Solving for x, we get:

x = (1121.1 - 235.2 x 2.6) / 235.2 = 1.25 m

Therefore, the boy can get as close as 1.25 meters from the right end of the beam without it falling over.

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ANSWER

EXPLANATION

If force F keeps the object in equilibrium

Answer:

See below

Explanation:

Find the x components of all of the forces shown, add them together, the x-component of the force F will be exactly opposite ( same magnitude but 180 degrees different)

30 cos 55  +     40 cos 205   +   50 cos 320  =  19.26    <====x component sum of all of the forces shown

F  (the x component of ) will be   Either    - 19.26   At zero degrees

                                                                 Or 19.26 at 180 degrees

Answer:

Over 60N

Explanation:

If the resultant force is equal, the car will not move. In order for the car to move, Becky needs to apply a force that is stronger than 60N, since her dad is already pushing 240 (240+60=300), so anything over 60 from Becky would move the car.

Answer:

6.34 m/s

Explanation:

Given that,

A basketball player leave the ground to rise 2.05 m above the floor  in an attempt to get the ball.

We need to find the velocity must a basketball player leave the ground. Using equation of kinematics as follows :

\(v^2-u^2=2ah\)

As it leaves the ground, its final velocity, v = 0

a = -g (opposite to gravity)

\(-u^2=-2gs\\\\u^2=2\times 9.8\times 2.05\\\\u=6.338\ m/s\)

or

u = +6.34 m/s

According to the one-year calendar model based on the Big Bang theory, life on the planet began in August.

The Big Bang theory is the most recent conjecture for the creation of the universe. The big explosion that occurred 13.7 billion years ago is believed to be the beginning of the journey of the entire universe.

The big bang theory describes the creation of the universe as an expansion of matter which then exploded like a giant balloon that is constantly being filled with air. The remnants of these explosions then each became the seeds for the formation of galaxies, solar systems, and the various objects that fill them.

Revealed, Dark Energy in the Universe in Cosmology

Cosmologists and physicists call the universe currently expanding as a result of the Big Bang explosion. Even the speed of its expansion is believed to continue to increase.

Scientists have also found predicted thermal signatures from the Big Bang, the cosmic microwave radiation that enveloped the universe. In the thermal traces there are no objects older than 13.7 billion years, indicating that the universe was born around that time (the time of the Big Bang phenomenon).

The traditional Big Bang theory holds that the universe began from a singularity, or point of infinite density and temperature whose properties are difficult for the human mind to comprehend.

But the theory does not accurately describe anything obvious, because the singularity idea is based on Einstein's general theory of relativity.

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Answer:

The cat ran a distance of 240 meters.

Explanation:

Given the following data;

Time, t = 30 secs.

Velocity, v = 8 m/s.

Distance =?

The formula for calculating distance is given by;

\( d = vt\)

Substituting into the equation, we have;

\( d = 8 * 30\)

d = 240m.

Fricition opposes the pushing force, so the net force is

10 N - 2 N = 8 N

to the right.

The country that would have the highest rate of skin cancers is England

We know that the chlorofluro carbons are the kind of pollutants that can be able to affect the ozone layer and bore what we call the ozone hole. We know that this can be disastrous to the ozone layer as there would be a combination of the chlorine form these with the ozone and thereby destroy the ozone layer.

We can see from the colored map that the ozone destruction seem to be much more severe in England than in other places.

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Explanation:

power = 1/2 mass × velocity^2 >>1

velocity = distance / time = 76 /18 = 4.2m

then power = 1/2 × 276 × (4.2)^2 = 138 × 17.64 = 2,434.3 jules.

Answer:

Kelvin

Explanation:

Kelvin is the universal and scientific unit for temperature as Celsius and Fahrenheit temperatures we use in everyday situations

The correct order of the steps involved in fractional crystallization is:

Magma, which is molten rock consisting of various minerals and gases, enters the magma chamber at depth. As it rises towards the surface, it encounters regions where the temperature and pressure decrease, causing the magma to cool and solidify partially. As the magma cools, the minerals with higher melting points begin to crystallize and settle to the bottom of the chamber. This process is called fractional crystallization. Minerals such as olivine, pyroxene, and plagioclase feldspar, which are rich in magnesium and iron, tend to crystallize first. The crystals formed in the magma chamber are denser than the remaining liquid magma, causing them to sink to the bottom of the chamber. This movement is called crystal settling. Over time, the crystals may accumulate to form a layered rock called a cumulate. As the denser minerals settle out, the remaining magma becomes enriched in lighter elements, such as silicon and aluminum. This change in composition leads to the formation of new minerals with different properties, such as quartz and orthoclase feldspar. The magma gradually shifts towards a more intermediate composition as it continues to cool and crystallize. Eventually, the magma may solidify completely to form an igneous rock.

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Answer:

Explanation:

log10 function is required to convert dB into intensity of a sound. Both are measures of loudness of a sound and the relationship can be expressed as follows:

dB = 10 log10(I/Io), where Io is 10^-12 W/m^2

Substituting, 82 = 10 log10(I/10^-12)

I = 0.0001585 W/m^2

or 1.58*10^-4 W/m^2

Answer:

Explanation:

82dB = 10log(Intensity/10^-12)

Intensity = 10^-12*10^(82/10)

=10^(-3.8)

=1.585*10^-4 W/m2

Answer:

\(\huge\boxed{\sf a = 5 \ ms^{-2}}\)

Explanation:

Given:

Force = f = 60 N

Mass = m = 12 kg

Required:

Acceleration = a = ?

Formula:

F = ma

Solution:

Rearranging formula

a = F / m

a = 60 / 12

a = 5 ms⁻²

\(\rule[225]{225}{2}\)

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a. The acceleration of the system is 0.21 m/s^{2}

b. The equation of the force of friction is -

tension force - force of friction = unknown mass x its acceleration and force of friction is equal to product of coefficient of friction and                    normal force acting on unknown mass .

c.  Newton's second law of motion applies when there are unbalanced forces acting on an object. According to the second law, the mass and the net force acting on the object both affect how quickly an object is accelerating . An object's acceleration is directly proportional to the net force applied and inversely proportional to the object's mass. An object's acceleration increases as the amount of force exerted on it does. A decreasing acceleration is caused by an increase in an object's mass.

The unknown mass is nearly equal to 30 kg .

What is acceleration ?

the rate at which the speed and direction of a moving object vary over time is termed as acceleration . An object going straight ahead  when it accelerates or decelerates,  is said accelerated. Even if the speed is constant, motion on a circle accelerates because the direction is always shifting. Both effects contribute to the acceleration for all other motions.

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When you change the thickness of the wire in a circuit, option B. the resistance (R) and current (I) will also change, but the voltage (V) will remain constant.

The resistance of a wire is directly proportional to its length and inversely proportional to its cross-sectional area (thickness). As the thickness of the wire changes, the cross-sectional area changes, which in turn affects the resistance. Thicker wires have a larger cross-sectional area, resulting in lower resistance, while thinner wires have a smaller cross-sectional area, resulting in higher resistance. Therefore, changing the thickness of the wire will cause a change in resistance.

According to Ohm's Law (V = IR), the voltage (V) in a circuit is equal to the product of the current (I) and the resistance (R). If the voltage is kept constant, and the resistance changes due to the thickness of the wire, the current will also change to maintain the relationship defined by Ohm's Law. When the resistance increases, the current decreases, and vice versa.

However, it's important to note that changing the thickness of the wire will not directly affect the voltage. The voltage in a circuit is determined by the power source or the potential difference applied across the circuit and is independent of the wire thickness. As long as the voltage source remains constant, the voltage across the circuit will remain constant regardless of the wire thickness. Therefore, the correct answer is option B.

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