A player kicks a football from the ground with a velocity of 27 m/s at an angle of 25o above the horizontal. How long does the ball stay in the air?

Explanation:

I shows fastest speed for 1sec ( 3 m/s)

C, G and I are the line segments where the object turned around and changed direction.

Answer:

No speed is when there is a line on the horizontal axis where speed=0. Constant speed is when there is a horizontal line above the horizontal axis.

Explanation:

Answer:The mass number of this carbon atom is six.

Explanation:

Thats the answer on plato

Evidence for magnetic reversals has been found for two bodies in the solar system: Earth and the sun.

On Earth, the magnetic field shifts and flips its polarity at irregular intervals, which are known as geomagnetic reversals. The last reversal occurred approximately 780,000 years ago. This process is thought to be caused by the motion of molten iron in the Earth’s core.

Similarly, on the sun, the magnetic field flips its polarity at the end of each 11-year solar cycle. This process is caused by the shifting of sunspots on the solar surface, which cause the magnetic field to reverse.

This reversal of the magnetic field on both Earth and the sun is evidence of the dynamo theory, which states that a planetary body’s magnetic field is generated by the motion of its liquid core.

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Answer:

Physics is a natural science that involves the study of matter and its motion through space and time, along with related concepts such as energy and force.

Answer:

The answer should be C. some mass was consumed in the reaction

A powder and a liquid with a total mass of 20 grams are combined in an open beaker, then the best explanation for the difference in mass is that some mass was consumed in the reaction. Hence, option C is correct.

A chemical reaction is the process by which any or more compounds, known as reagents, change into one or more new ones, known as products. Active ingredients or compounds make up substances. The atoms that make up the reactants are reorganized in a chemical reaction to create various products.

Technology, society, and even life itself depend on chemical interactions in one way or the other and. Chemical reactions have been recognized and employed for thousands of years in a wide variety of activities, including burning fuels, smelting iron, creating pottery and pottery, brewing beer, making wine, and manufacturing cheese. There are countless examples of complicated chemical reactions in all living systems, as well as in the Earth's geology, atmosphere, and oceans.

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Answer:

The current would increase.

Explanation:

The current would increase. 10. The relationship between resistance and current in a circuit is that the greater the resistance the less the current and the greater the current the less the resistance is.

if a 1.5-volt battery is removed and placed by a 9-volt battery in a circuit, From Ohm's law we can say that the current flow inside the circuit will increase because the voltage increases (resistance remains constant).

Ohm's Law is a fundamental law of physics that describes the relationship between the three basic electrical quantities: voltage, current, and resistance in a circuit.

It states that the current through a conductor between two points is directly proportional to the voltage across the two points and inversely proportional to the resistance between them. Mathematically, Ohm's Law is expressed as:

V = I x R

Where:

V = the voltage or potential difference between two points in the circuit,       measured in volts (V).

I = the current flowing through the circuit, measured in amperes (A).

R = the resistance of the conductor, measured in ohms (Ω).

In other words, the voltage (V) across a circuit component is equal to the product of the current (I) flowing through the component and its resistance (R). This law is applicable to both DC (direct current) and AC (alternating current) circuits, as long as the resistance is constant.

Ohm's Law can be used to calculate any one of the three variables if the other two are known. For example, if the voltage and resistance in a circuit are known, the current flowing through the circuit can be calculated using the formula:

I = V / R

Here in the question,

The current in a circuit is determined by the resistance of the circuit and the voltage applied to it, according to Ohm's Law. If a 9-volt battery replaces a 1.5-volt battery, the voltage applied to the circuit will increase, which may cause an increase in the current flowing through the circuit if the resistance remains the same.

However, the increase in voltage may also cause an increase in the heat generated by the circuit, which could potentially damage the components or cause a safety hazard. Therefore, it is important to ensure that the components in the circuit can handle the higher voltage before replacing the battery.

It's also important to note that the current may also depend on the internal resistance of the batteries. A 9-volt battery typically has a lower internal resistance than a 1.5-volt battery, which means it can supply more current to the circuit. So, even if the resistance of the circuit remains the same, the current may still increase due to the higher voltage and lower internal resistance of the 9-volt battery.

Hence, The current flowing through the circuit increased when we removed a 1.5-volt battery and replaced it with a 9-volt battery.

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Answer:

4hrs

Explanation:

speed =72km/hr

distance= 300km

time =?

using this formula we make time the subject of the formula

time = distance/speed

time = 300/72

time = 4.1

therefore,

time is equal to 4hrs

Given a train running at a speed of 72 km/h.

We have to find the time taken to cover a distance of 300 km.

We can use the relation between distance, time and speed to solve this.

speed = distance

time

time : distance

speed

The time taken will be:

t = 300 h

72

We can simplify it further to get:

t = 25 h

6

Thus, the time taken is 25/6 hours.

Match the volcano type with its correct

1. Cinder Cone:

Plate Tectonic Setting: Mostly Spreading Ridges, some Mantle Plumes

2. Composite/Stratovolcano:

Plate Tectonic Setting: Subduction Zones (Convergent Margins)

3. Shield Volcano:

Plate Tectonic Setting: Mostly Mantle Plumes, some Spreading Ridges

4. Large Igneous Provinces (LIPs):

Plate Tectonic Setting: Various tectonic settings

Volcano types can be associated with specific plate tectonic settings and magma compositions. Let's match the volcano types with their correct plate tectonic settings and magma compositions:

1. Cinder Cone:

Plate Tectonic Setting: Mostly Spreading Ridges, some Mantle Plumes

Magma Composition: Mafic

Cinder cones are typically small, steep-sided volcanoes that form from the eruption of basaltic magma. They are commonly found in volcanic regions associated with spreading ridges, where tectonic plates are moving apart, or in areas influenced by mantle plumes, such as hotspot volcanism.

2. Composite/Stratovolcano:

Plate Tectonic Setting: Subduction Zones (Convergent Margins)

Magma Composition: Intermediate, varies from felsic to mafic

Composite or stratovolcanoes are characterized by their steep slopes and alternating layers of lava flows and pyroclastic materials. They are commonly found in subduction zones, where an oceanic plate is being subducted beneath  continental plate. The magma composition of these volcanoes varies, ranging from felsic (high silica content) to mafic (lower silica content).

3. Shield Volcano:

Plate Tectonic Setting: Mostly Mantle Plumes, some Spreading Ridges

Magma Composition: Mafic

Shield volcanoes are large, broad, and gently sloping volcanoes that form from the eruption of basaltic magma. They are often associated with mantle plumes, such as those found in hotspot regions, as well as in volcanic areas influenced by spreading ridges.

4. Large Igneous Provinces (LIPs):

Plate Tectonic Setting: Various tectonic settings

Magma Composition: Mafic

Large Igneous Provinces (LIPs) are extensive regions of volcanic and intrusive rock formations that are associated with massive outpourings of mafic magma. They can occur in various tectonic settings, including continental rifts, hotspot regions, and flood basalt provinces.

5. Seafloor Volcanism, Pillow Lava:

Plate Tectonic Setting: Mostly Spreading Ridges

Magma Composition: Mafic

Seafloor volcanism is primarily associated with spreading ridges, where magma wells up and creates new oceanic crust. The lava erupted underwater cools rapidly, forming pillow-shaped structures known as pillow lavas. The magma composition is typically mafic, dominated by basaltic lavas.

These associations between volcano types, plate tectonic settings, and magma compositions provide insights into the geological processes and Earth's dynamics that shape the Earth's surface.

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The energy transferred by the appliance using mains electricity is 17.3 KJ

The energy transferred can be obtained as follow:

E = ½QV

E = ½ × 150 × 230

E = 75 × 230

E = 17250 J

Divide by 1000 to express in kilojoules

E = 17250 / 1000

E = 17.3 KJ

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Answer:

11250Joules

Explanation:

1 half times 100kg times (15m/s) ^2

1. Squared the 15 =225m/s

2.times the kg to m/s- 100kg x 225m/s=22500

3. Divided by 2 = 11250Joules

KE= 11250J

Using the strain energy that the pole has stored in it, the running athlete's kinetic energy is transformed into the potential energy needed to jump.

Males employ the formula: h= 0.60 * [male height] + 12(v2/g), whereas females use h= 0.55 * [female height] + 12(v2/g).

It is merely an instance of energy being exchanged. If an athlete can run at 10 m/s and we calculate g as 10 m/s/s, the height equals 5 m.

Each vaulter has three tries to clear a particular height during a competition. In order to fall readily if touched, a bar is supported by two uprights. Up until a winner is determined through the process of elimination, it is raised gradually.

There has been a failed trial. A competitor's pole breaking while trying to clear the bar is not considered a trial or failure. No one is permitted to touch the vaulting pole.

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Answer:

A

Explanation:

I took the test on progress learning and got it right.

If we increase the velocity of an object by 1 meter per second, as a result the kinetic energy of the object will increase as velocity is directly proportional to the kinetic energy.

The kinetic energy of an object is the energy which the object possesses due to its motion. Kinetic energy is defined as the work which is required be done to accelerate an object of a given mass from the state of rest to its stated velocity.

Kinetic energy is the energy possessed by an object due to its motion. Potential energy is the form of energy which is possessed by an object due to the position or state. Kinetic energy is directly proportional to the mass and velocity of the object. Therefore, if we increase the velocity of an object, then kinetic energy of the object will increase.

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Calculate the velocity(v) at the bottom of hill.

As we know ,

\( \bf\: Kinetic \: energy = \dfrac{1}{2} \times m \times {v}^{2} \)

\( \red \bigstar \bf \: putting \: the \: values\)

\( \rightarrow \: 25 = \dfrac{1}{2} \times 2 \times {v}^{2} \)

\( \rightarrow \: 25 \times 2 = 1 \times 2 \times {v}^{2} \)

\( \rightarrow \: 50 = 2 \times {v}^{2} \)

\( \rightarrow \: {v}^{2} = \cancel \dfrac{50}{2} \)

\( \rightarrow \: {v}^{2} = 25\)

\( \rightarrow \: v = \sqrt{25} \)

\( \rightarrow \: v = 5 \: m {s}^{ - 1} \)

EAC( Low-energy lightbulb )=18.47 EAC( Conventional lightbulb )=7.33 Conventional lightbulb is cheaper to operate. Option D

To calculate the Equivalent Annual Costs (EAC), we need to consider the initial cost, maintenance costs, and the present value of future costs, taking into account the discount rate.

The EAC (Equivalent Annual Cost) is calculated by summing up the annual costs of the lightbulb over its lifetime, discounted at the real discount rate of 4%.

For the low-energy lightbulb:

EAC = Cost of bulb + Present value of annual electricity cost

= $3.60 + ($2.00 / (1 + 0.04)^1) + ($2.00 / (1 + 0.04)^2) + ... + ($2.00 / (1 + 0.04)^9)

≈ $18.47

For the conventional lightbulb:

EAC = Cost of bulb + Present value of annual electricity cost

= $0.60 + ($7.00 / (1 + 0.04)^1) + ($7.00 / (1 + 0.04)^2) + ... + ($7.00 / (1 + 0.04)^1)

≈ $7.33

Since the EAC for the low-energy lightbulb is $18.47 per year and the EAC for the conventional lightbulb is $7.33 per year, the conventional lightbulb is cheaper to operate assuming a burnt-out bulb is replaced by an identical bulb.

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The acceleration experienced by the crate is approximately 0.844 m/s

Weight of the crate:

Weight = mass × acceleration due to gravity

Weight = 114 kg × 10 m/s^2

Weight = 1140 N

Force of friction:

Force of Friction = coefficient of friction × normal force

Force of Friction = 0.541 × 1140 N

Force of Friction ≈ 616.74 N

Net force:

Net Force = Applied Force - Force of Friction

Net Force = 713 N - 616.74 N

Net Force ≈ 96.26 N

Acceleration:

Acceleration = Net Force / mass

Acceleration = 96.26 N / 114 kg

Acceleration ≈ 0.844 m/s

Therefore, the acceleration experienced by the crate is approximately 0.844 m/s

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There are many metallic objects that we use everyday in home. The utensils, metallic envelop of electronic devices, case of other equipments and can etc. are made of metals. Some of these metals are attracted to strong magnets such as iron.

A  magnetic field is created by strong strong field lines from a magnet which can attract other objects into it which are magnetically susceptible. The magnetic properties of a material depends on the applied magnetic field and temperature.

a ) Most of the materials that we use in home are made of metals. Case of electronic devices, utensils, steel , window bars, etc are all made of metals.

b)  Some metals like iron, and its alloys are magnetically susceptible and can form strong magnets. Their field lines will align parallel to the applied magnetic field. Hence, metallic utensils, window bars , steel plates, metallic parts of devices are all magnetically susceptible.

c). Magnets can be used to sort products by separating the metals. We can use this method to recycle or reuse the metals and can remove metallic pollutants from raw materials. For example, metallic hair pins and coins can be separated out using magnets.

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Answer:

(0.5, 2)

(-2, 4)

Explanation:

A. The average drift speed of the electrons in the wire is  1.19 x \(10^{-3}\)cm/s.

B. The time it would take an electron to travel 8.84 m is 7.43 x \(10^{5}\)sec

(A) To find the average drift speed of electrons in a wire, we can use the equation:

I = nAvq

Where:
I is the current in Amperes
n is the electron density in electrons per \(cm^{3}\)
A is the cross-sectional area of the wire in \(cm^{2}\)
v is the average drift velocity of electrons in cm/s
q is the charge of an electron, which is 1.6 x \(10^{-19}\) Coulombs

First, we need to find the cross-sectional area of the wire. The formula for the area of a circle is:

A = π\(r^{2}\)

Where:
A is the area of the circle
r is the radius of the circle

Given that the wire diameter is 1.63 mm, we can find the radius by dividing it by 2:

r = 1.63 mm / 2 = 0.815 mm = 0.0815 cm

Now, we can calculate the area:

A = \(π(0.0815 cm)^{2}\) = 0.0209 \(cm^{2}\)

Next, we can rearrange the equation to solve for v:

v = I / (nAq)

Given that the current is 20 A and the electron density is 8.47 x \(10^{24}\)electrons per \(cm^{3}\), we can substitute these values into the equation:

v = 20 A / (8.47 x \(10^{24}\) electrons per cm^3 * 0.0209 cm^2 * 1.6 x \(10^{-19}\) C)

Simplifying the expression:

v = 1.19 x \(10^{-3}\) cm/s

Therefore, the average drift speed of electrons in the 14 gauge wire carrying a maximum current of 20 A is approximately 1.19 x \(10^{-3}\) cm/s.

(B) To calculate the time it would take for an electron to travel a distance of 8.84 m, we can use the formula:

t = d / v

Where:
t is the time in seconds
d is the distance in meters
v is the average drift velocity of electrons in meters per second

Given that the distance is 8.84 m and the average drift velocity is 1.19 x 10^-3 cm/s, we need to convert the velocity to meters per second:

v = 1.19 x \(10^{-3}\) cm/s * 0.01 m/cm = 1.19 x \(10^{-5}\) m/s

Now, we can substitute the values into the formula:

t = 8.84 m / 1.19 x \(10^{-5}\)m/s

Simplifying the expression:

t = 7.43 x \(10^{5}\)s

Therefore, it would take approximately 7.43 x \(10^{5}\) seconds for an electron to travel a distance of 8.84 m.

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Answer:

They are made of one type of atom.

Explanation:

Answer:

The answer is A

Explanation:

The gravitational force of attraction between the Earth and Jupiter is approximately 1.32 x 10²⁸ N.

The gravitational force of attraction between two objects can be calculated using Newton's law of universal gravitation, which states that the force (F) is proportional to the product of their masses (m₁ and m₂) and inversely proportional to the square of the distance (r) between their centers. Mathematically, the formula is expressed as:

F = (G * m₁ * m₂) / r²

where G is the gravitational constant.

m₁ = 6 x 10²⁴ kg (mass of Earth)

m₂ = 1898.6 x 10²⁴ kg (mass of Jupiter)

r = 5.88 x 10¹¹ m (distance between Earth and Jupiter)

Plugging in the values into the formula, we have:

F = (6.67 x 10⁻¹¹ N m²/kg²) * (6 x 10²⁴ kg) * (1898.6 x 10²⁴ kg) / (5.88 x 10¹¹ m)²

Calculating the expression, we find:

F ≈ 1.32 x 10²⁸ N

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THE COMPLETE QUESTION IS:

Determine the gravitational force of attraction between the Earth and Jupiter given the mass of the earth is 6 x 10²⁴ kg the mass of Jupiter is 1898.6 x 10²⁴ kg and the closest distance is about 5.88 x 10¹¹

The PEP/9 Assembly language equivalent of the given hexadecimal instructions is as follows:

DECI 3, d

DECO 49, i

DECL 1, i

DECL 49, i

In PEP/9 Assembly language, instructions are written using mnemonics that represent specific operations. The first instruction, "DECI 0×0003, d," is equivalent to "DECI 3, d" in assembly language. It performs a decimal input operation, storing the value in memory location 'd'.

The second instruction, "DECO Ox0031, i," translates to "DECO 49, i" and outputs the decimal value 49 from memory location 'i'. The last two instructions, "DECL 0x0001, i" and "DECL 0x0031, i," are simply represented as "DECL 1, i" and "DECL 49, i" in assembly language, respectively. These instructions decrement the values in memory locations 'i' by 1.

By providing the assembly language equivalents, it becomes easier to understand and work with the given hexadecimal instructions in the PEP/9 architecture.

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Answer:

269 because 150 x/6 =5 kk

Answer:

it took 30 seconds:)

Explanation:

in order to find the time you must divide distance( 150 m) by speed (5 m/s) which equals 30 seconds.

Class 2 cables shall have a minimum voltage rating of 300 volts.

What is the voltage ?

The voltage is a measure of the difference in electric potential between two points in a circuit. It is measured in volts and is one of the basic parameters of electrical engineering. Voltage can be generated in a variety of ways, including through #SPJ1generators, batteries, and power supplies. When two points with different potentials are connected, current can flow from the higher potential point to the lower potential point. Voltage is also used to measure the potential difference between two points in a circuit, as well as to calculate the power in the circuit. In addition, voltage is used to control the flow of current in a circuit, by either increasing or decreasing the potential difference between the two points.

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The person who first proposed that electrons exhibit the properties of a wave was French physicist Louis de Broglie in 1924. De Broglie introduced the concept of wave-particle duality, suggesting that particles, such as electrons, could also have wave-like properties.

We have heard about the nature of light and the characters it displays. Interference, reflection, refraction and diffraction are some of the characteristics. Wave-Particle Duality helps us to understand the particle and wave nature of light. Based on the idea that light and all other electromagnetic radiation may be considered a particle or a wave nature, in 1923 physicists Louis De Broglie suggested that the same kind of duality must apply to the matter.

So, The person who first proposed that electrons exhibit the properties of a wave was French physicist Louis de Broglie in 1924.

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The energy released by the sun in one second, also known as the solar luminosity, is much greater than the annual energy usage of the earth.

The solar luminosity is estimated to be about 3.8 x 10^26 watts, while the total energy usage of the earth is estimated to be around 157,481 terawatt-hours per year, or about 18 x 10^12 watts. This means that the energy released by the sun in just one second is many orders of magnitude greater than the total energy used by all human activities on earth in a year. The sun's enormous energy output is what drives most of the physical and biological processes on our planet.

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Explanation:

The kinetic energy of a particle in SHM is given by :

\(K=\dfrac{1}{2}m\omega^2(A^2-x^2)\)

Where

m is the mass of a particle

A is the amplitude

x is the distance

\(\omega\) is the angular frequency

The kinetic energy of a particle executing SHM is maximum at its equilibrium position and minimum at a maximum displacement from the equilibrium point.

Skateboarders move more quickly and more slowly depending on the gravitational field around them.

Skateboarders go more slowly and more quickly depending on the amount of friction they encounter. The skater initially has no kinetic energy, only potential energy. The skater had used all of the energy that she will ever have. Since the track is frictionless, no energy is converted to thermal energy throughout the route from point A to point B. The skater has greater potential energy the higher he is. His kinetic energy increases and his potential energy falls as his height decreases. Ice skating is a good illustration of sliding friction.

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