Say you throw a ball straight up into the air and catch it again. The ball reaches a height of 5 m up from your hand before it falls back down and you catch it. The ball is in flight for 2 seconds of time. Determine the ball’s... average velocity average speed

Answer:

two poles

Explanation:

Answer:

\(9\ \text{m/s}^2\)

Explanation:

m = Mass of the object = 2 kg

W = Weight of the object = 18 N

g = Acceleration due to gravity

Weight of the an object is given by

\(W=mg\)

\(\Rightarrow g=\dfrac{W}{m}\)

\(\Rightarrow g=\dfrac{18}{2}\)

\(\Rightarrow g=9\ \text{m/s}^2\)

The acceleration due to gravity on that planet is \(9\ \text{m/s}^2\).

Answer:

See below

Explanation:

16)  Find acceleration

          F = ma

      500 = 200 a         a = 2.5 m/s^2

Then:

     v = at

  8 = 2.5 t    t = 3.2 sec

then, distance travelled:

     d = 1/2 a t^2 = 1/2 * 2.5 * 3.2^2 = 12.8 m

17)

Answer:

1.1 m/s²

Explanation:

From the question,

F -mgμ = ma.................... Equation 1

Where F = applied force, m = mass of the apple cart, g = acceleration due to gravity, μ =  coefficient of friction., a = acceleration of the apple cart.

Given: F = 115 N, m = 25 kg,  μ  = 0.35

Constant: g = 10 m/s²

Substitute these values into equation 2

115-(25×10×0.35) = 25×a

115-87.5 = 25a

25a = 27.5

a = 27.5/25

a = 1.1 m/s²

Answer: 3

Explanation: no atmosphere would cause living things to die and allow meteorites to hit into the earth

Asteroids are small rocky or metallic bodies left over from the formation of the solar system, usually found in the asteroid belt between Mars and Jupiter.

Comets are icy bodies with rock and metal mixed in, found mostly in the Kuiper belt and Oort cloud.

Dwarf planets are objects that resemble planets in their behavior but are too small to have cleared their orbit of other debris, such as Pluto.

Meteors are debris that burns up in Earth's atmosphere, also known as shooting stars.

Meteorites are debris that survives entry into Earth's atmosphere and hits the ground.

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Answer:

it's mass

Explanation:

A star's life cycle is determined by its mass. The larger its mass, the shorter its life cycle. A star's mass is determined by the amount of matter that is available in its nebula, the giant cloud of gas and dust from which it was born.

Answer:

repel , attract,l am sure with these two blanks only

Answer:

Magnetic fields

A magnet creates a magnetic field around it. You cannot see a magnetic field, but you can observe its effects. A force is exerted on a magnetic material brought into a magnetic field. The force is a non-contact force because the magnet and the material do not have to touch each other.

Assuming the force acting on the objects is constant, a claim about inertia and acceleration which is supported by the data include the following: B. An object with a higher mass has more inertia which causes it to speed up less quickly.

Newton's First Law of Motion is also referred to as Law of Inertia and it states that an object in motion would continue in its state of motion at continuous velocity (same speed and direction) or if at rest, it will remain at rest unless it is acted upon by an external force.

This ultimately implies that, the amount of net force keeping a physical object moving at a constant speed and in a specific direction is always equal to zero (0) newton in accordance with Newton's First Law of Motion.

In this context, we can reasonably infer and logically deduce that a physical object that has a higher mass would have more inertia, which causes it to either experience a slower motion or speed up less quickly.

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Answer: its c

Explanation: i took the test

Answer:

c

Explanation:

5.3" (and any subsequent words) was ignored because we limit queries to 32 words.

The process shown is an example of alpha emission, as it involves the emission of an alpha particle (consisting of two protons and two neutrons) from the uranium nucleus to form the thorium nucleus.
The process you provided, 23892U → 23490Th + 42He, is an example of:
b) alpha emission

1. Identify the initial element and the products: The initial element is uranium-238 (23892U), and the products are thorium-234 (23490Th) and helium-4 (42He).
2. Compare the initial element and the products: The uranium-238 nucleus loses two protons and two neutrons, forming thorium-234 and a helium-4 nucleus.
3. Determine the type of radioactive decay: Since a helium-4 nucleus (also known as an alpha particle) is emitted, this process is an example of alpha emission.

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Answer:

c

Explanation:

The electric potential energy of the charge is divided by 2.

To find the electric potential energy, the values given from the source of an electric field changes from 3 mm to 6 mm.

            The electric potential energy is the energy that is needed to move a charge against the electric field.

The energy can be calculated as Work and these energy can be calculated as a whole not only the charges.

Formula for electric potential energy,

         U = KQ²/r

where,

K is the constant, k =  9 × 10⁹

Substituting the values of q as the charges and then the distance can be,

U = KQ² / 3   and U = KQ² / 6

So that, the values can be divided by 2.

The unit of electric potential energy is Joule.

The distance can be from r to ∞.

Hence, Option B is the correct answer.

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the rate of a reaction is dependent on the temperature because higher temperatures mean higher kinetic energy and therefore faster-moving particles. The rate of a reaction is approximately doubled for every 10 oC rise in temperature, so a 50 oC rise would result in

the rate being approximately doubled five times (50/10 = 5). This means that the rate of the reaction would increase by 2 raised to the power of 5, which is 32 times. Therefore, the answer is c. 32 times. The rate of a reaction is approximately doubled for every 10°C rise in temperature. If the temperature is raised by 50°C, the reaction rate increases by about:

Determine how many 10°C increments are in 50°C. 50°C / 10°C = 5 increments  Calculate the increase in reaction rate.
Since the rate doubles for each 10°C increment, use the formula 2^n, where n is the number of increments. 2^5 = 32
So, the answer is c. 32 times. The reaction rate increases by about 32 times when the temperature is raised by 50°C.

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The potential (V) at a distance (x) to the right of the rod can be expressed as: V = (kλ / 2πε₀) * ln[(l + x) / x],
which includes the given quantities (λ, l, x) and appropriate constants (k, ε₀).

Finding the potential (V) at a distance (x) to the right of the rod. Here's a concise explanation using the given terms:

The potential (V) at a distance (x) from a uniformly charged rod can be found using the formula:

V = (kλ / 2πε₀) * ln[(l + x) / x],

where k is Coulomb's constant (approximately 8.99 × 10⁹ Nm²/C²), λ is the linear charge density of the rod, ε₀ is the vacuum permittivity (approximately 8.85 × 10⁻¹² C²/Nm²), l is the length of the rod, and ln is the natural logarithm function.

This formula is derived from the principle of superposition, taking the electric potential contribution from each infinitesimal charge segment of the rod and integrating over its entire length. The natural logarithm arises from the integration of the inverse distance from each charge segment to the point where the potential is being evaluated.

In conclusion, the potential (V) at a distance (x) to the right of the rod can be expressed as:

V = (kλ / 2πε₀) * ln[(l + x) / x],

which includes the given quantities (λ, l, x) and appropriate constants (k, ε₀).

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Based on the given information, the temperature at your station in Houston is likely to decrease in the next 2 hours due to the constant temperature advection and is estimated to be 63.04ºF (16.8ºC).

Given the wind speed of 10 m/s from the west-northwest, we can use the concept of wind advection to adjust the temperature gradient based on the speed and direction of the wind.

First, we need to convert the wind speed from meters per second to kilometers per hour, as the temperature gradient is typically expressed in degrees per kilometer.

10 m/s is equivalent to 36 kilometers per hour (10 m/s * 3.6 km/h).

Next, we can adjust the temperature gradient based on the wind speed. The temperature change due to advection is typically estimated using a rule of thumb, which suggests that for each 10 kilometers per hour of wind speed, the temperature change is approximately 1 degree Celsius (or 1.8 degrees Fahrenheit) over a distance of 100 kilometers.

In this case, with a wind speed of 36 kilometers per hour, the adjusted temperature change due to advection would be approximately 3.6 degrees Celsius (or 6.48 degrees Fahrenheit) over a distance of 100 kilometers.

Now, let's calculate the temperature change at your station in Houston after 2 hours using the adjusted temperature gradient.

Temperature change = Adjusted temperature gradient × Distance × Time

Temperature change = 3.6°C/200 km * 200 km * 2 hours

Calculating the result, the temperature at your station in Houston is estimated to decrease by 7.2 degrees Celsius (or 12.96 degrees Fahrenheit) after 2 hours.

To find the final temperature at your station, subtract this temperature change from the initial temperature of 76ºF (24ºC):

Final temperature = Initial temperature - Temperature change

Final temperature = 76ºF (24ºC) - 12.96ºF (7.2ºC)

The estimated final temperature at your station in Houston after 2 hours is approximately 63.04ºF (16.8ºC).

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Answer:

1.15*10^-5 kg/m^3

Explanation:

Given data

mass= 1kg

hieght= 40 mm

diameter= 52.5mm

radius= 53.5/2= 26.25mm

The volume of the cylinder

V=πr^2h

V=3.142*26.25^2*40

V=3.142*689.0625*40

V=86601.375 mm^3

Density= mass/volume

Density= 1/86601.375

Density=0.00001154716

Density= 1.15*10^-5 kg/m^3

Hence the density is  1.15*10^-5 kg/m^3

The plane travels a distance of 325 miles if the airplane travels for 2.5 hours at an average speed of 130 miles per hour. Using the distance formula (d = rt), we can calculate the distance.

To find the distance traveled by the airplane, we can use the distance formula, which is represented as d = rt. In this formula, "d" represents the distance, "r" represents the rate or speed at which the object is traveling, and "t" represents the time taken for the travel.

Given that the airplane travels for 2.5 hours at an average rate of 130 miles per hour, we can substitute these values into the formula. The rate of the airplane is 130 miles per hour, and the time taken is 2.5 hours.

Using the formula, we can calculate the distance traveled as follows:

d = rt

d = 130 mph × 2.5 hours

Multiplying the rate (130 mph) by the time (2.5 hours) gives us:

d = 325 miles

Therefore, the airplane travels a distance of 325 miles during the 2.5 hours of travel at an average rate of 130 miles per hour.

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The nuclear energy of the fuel in a nuclear power plant is primarily converted to heat when reacted.

Option (c) is correct.

In a nuclear power plant, nuclear fission reactions take place within the fuel, typically uranium or plutonium. These reactions release a tremendous amount of energy in the form of heat. This heat is used to produce steam, which drives a turbine connected to a generator.

The generator then converts the mechanical energy from the turbine into electricity. So while nuclear energy is ultimately converted into electricity, the primary conversion that occurs within the power plant is from nuclear energy to heat. The heat is the intermediary form of energy that drives the electricity generation process.

Therefore, the correct option is (c) Heat.

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Complete question is:

The nuclear energy of the fuel in a nuclear power plant is

converted to ______ when reacted?

Group of answer choices

a) Chemical Energy

b) Light

c) Heat

d) Electricity

the magnetic field along the axis at the centre of the solenoid is approximately 5.47 × 10⁻⁴ T.

The magnetic field along the axis at the centre of a solenoid can be calculated using the formula:

B = μ₀nI

Where B is the magnetic field, μ₀ is the permeability of free space (4π × 10⁻⁷ T m/A), n is the number of turns per unit length (n = N/L), and I is the current.

In this case, the length of the solenoid is 99 cm, the radius is 3.14 cm, and the current is 3.05 A. So we can calculate the number of turns per unit length as:

n = N/L = 450/0.99 = 454.5 turns/m

Now we can substitute these values into the formula:

B = μ₀nI = (4π × 10⁻⁷ T m/A)(454.5 turns/m)(3.05 A) ≈ 5.47 × 10⁻⁴ T

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Answer:

he is the first person can be 3in and a 6man is the best not a man of the hartford

Answer:

C. Delegated

Explanation:

Answer:

its letter C

Explanation:

just trust

The core of a red giant is contracting, but the outer layers are expanding as a result of hydrogen fusion in a shell outside the core

Nuclear fusion of hydrogen to form helium happens evidently in the solar and different stars. It takes area best at extremely high temperatures. Scientists are attempting to find methods to create controlled nuclear fusion reactions on earth.

Researchers at Lawrence Livermore countrywide Laboratory's country-wide Ignition Facility in California have spent over a decade perfecting their method and the feature now showed that the landmark test conducted on eight August 2021 did, in fact, produce the primary-ever successful ignition of a nuclear fusion reaction.

People had been capable of cause fusion, but in methods that might be uncontrolled, like in thermonuclear guns sometimes called hydrogen bombs. Fusion has additionally been proven in laboratories, but below conditions that eat a long way, extra strength than the reaction produces.

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Answer:

Output power = 500 KW

Explanation:

Given the following data;

Efficiency = 20%

Input power = 2500 KW

To find the output power;

\( Efficiency = \frac {Out-put \; power}{In-put \; power} * 100 \)

Substituting into the equation, we have;

LET Output power = OP

\( 20 = \frac {OP}{2500} * 100 \)

Cross-multiplying, we have;

\( 20 * 2500 = OP * 100 \)

\( 50000 = OP * 100 \)

\( OP = \frac {50000}{100} \)

Output power = 500 KW

The graph shown in the first option nicely plots the lion's and gazelle's velocities as a function of time, so option A is the correct answer.

Velocity is the rate of change of displacement over time.

As mentioned in the problem of running at a constant speed towards a gazelle with a standing lion as shown above.

So option A is correct.

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The Greenworks 40V Brushless Self-Propelled Lawn Mower is a 21-inch electric lawn mower that comes with a 5.0Ah battery and charger.

This lawn mower features a brushless motor that offers higher efficiency and increased battery runtime, resulting in better overall performance. The 21-inch cutting deck provides a wide cutting path, enabling you to cover larger areas in less time. The self-propelled feature allows for easier maneuverability, particularly on uneven terrain. The mower comes with a 5.0Ah battery, which provides enough power to handle most mowing tasks, and a charger for convenient recharging. With a runtime of up to 60 minutes, this lawn mower can cover a large area on a single charge. With its environmentally friendly design, the Greenworks 40V mower is an excellent choice for maintaining your lawn.
In conclusion, the Greenworks 40V Brushless Self-Propelled Lawn Mower is an excellent investment for those who want to keep their lawn well-manicured without sacrificing the environment. With its powerful motor, user-friendly features, and eco-friendly design, this lawn mower is a great option for anyone looking for a high-quality, efficient, and sustainable lawn mower.

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Answer:

Measurement is the assignment of a number to a characteristic of an object or event

Explanation:

Answer:

Measurement is the assignment of a number to a characteristic of an object or event, which can be compared with other objects or event

Assuming a flat ground, and  football thrown or dropped from the same height, the horizontally-thrown ball will hit the ground with the same vertical velocity as the dropped ball, but it will have most of its initial horizontal velocity, too. A simple vector addition, guarantees that that the horizontally-thrown ball will have a larger total velocity than the dropped ball.

What is Velocity.

Velocity is the directional velocity of a moving object as an indicator of the rate of change of position observed from a particular frame of reference and measured at a particular time standard.

Therefore, A simple vector addition, guarantees that that the horizontally-thrown ball will have a larger total velocity than the dropped ball.

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a) The motion of the motorcyclist is a uniform motion

b) The distance is 600 m

c) The speed is 20 m/s.

We now that motion has to do with the change in the position of an object with time. In this case, we have the graph that described the motion of the motorcyclist . It is clear that the distance is increasing in equal amounts, in equal time intervals thus this is a uniform motion.

Looking at the graph, we can see that the motorcyclist covers 600 meters of distance within 30 seconds.

We can obtain the speed as the ratio of the distance to the time or the slope of the graph. Hence the speed is obtained from;

Speed = distance / time

Using the slope concept;

\(y_{2} - y_{1} /x_{2} - x_{1}\)

= 600 - 0/30 - 0

= 20 m/s

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No, the sun cannot explain global warming. Global warming is a phenomenon in which the temperature of the Earth's surface and atmosphere is rising continuously due to human activities such as deforestation, burning of fossil fuels, and industrialization.

This increase in temperature cannot be explained only by an increase in solar radiation.There are several factors which contribute to global warming, including greenhouse gases such as carbon dioxide, methane, and water vapor. These gases trap heat in the Earth's atmosphere, which causes the planet's temperature to rise. The sun's radiation does contribute to global warming, but it is not the main cause.

i) To calculate the increase in solar radiation that would cause the Earth to warm up by 1 K, we can use the following formula:ΔS = ΔT / αWhere ΔS is the increase in solar constant, ΔT is the increase in temperature, and α is the Earth's albedo (reflectivity).α = 0.30 is the standard value used for the Earth's albedo.ΔS = ΔT / αΔS = 1 K / 0.30ΔS = 3.33 W/m2So, to explain the increase in temperature of 1 K over the last hundred years, the solar constant would need to increase by 3.33 W/m2.

ii) The observed fluctuation of the solar constant over the past 400 years has been around 0.1% to 0.2%. This is much smaller than the 3.33 W/m2 required to explain the increase in temperature of 1 K over the last hundred years. Therefore, it is unlikely that the sun is the main cause of global warming.

The sun cannot explain global warming. While the sun's radiation does contribute to global warming, it is not the main cause. The main cause of global warming is human activities, particularly the burning of fossil fuels, which release large amounts of greenhouse gases into the atmosphere.

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