as part of his science fair project, Jacob needed to measure the length of the pods produced by sweet pea plants grown under various condition.

Answer:

11m/s²

Explanation:

Given parameters:

Mass of object  = 10g  = 0.01kg

Radius  = 5cm  = 0.05m

V = 0.75m/s

Unknown:

Centripetal acceleration  = ?

Solution:

Centripetal acceleration is the acceleration of a body in circular path. It can be derived using;

     a  = \(\frac{v^{2} }{r}\)  

v is the velocity

r is the radius

Now, insert the parameters;

         a  = \(\frac{0.75^{2} }{0.05}\)   = 11.25m/s²

Answer:

The answer is B.

Explanation:

The formula of power is :

\(power = \frac{work \: done}{time} \)

* Work done can be "Energy"

Potential energy is the energy an object possesses due to its position or state.

It can be thought of as stored energy that can be released or converted into other forms of energy, such as kinetic energy (energy of motion).

For example, a book sitting on a shelf has potential energy because it has the potential to fall and convert that potential energy into kinetic energy (motion). Similarly, a charged battery has potential energy because it has the potential to release electricity.

Another example of potential energy is a charged battery. A charged battery has the potential to release electricity, which is a form of energy. The more charge a battery has, the more potential energy it holds. When the battery is used to power a device, the potential energy is converted into electrical energy.

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The wavelength of a wave of the frequency is increased to 784 Hz will be 0.57 metre.

The distance between two successive troughs or crests is known as the wavelength. The peak of the wave is the highest point, while the trough is the lowest.

The given data in the problem is;

f₁ is the  frequency of  a sound wave in case 1 = 196 Hz

\(\lambda\)₁ is the wavelength for the  = 1.76 meters.

f₂ is the  frequency of  a sound wave in case 2 = 784 Hz

\(\lambda_2\) is the wavelength for case 2=?

The speed of the wave for the same medium is same which is given as;

\(\rm v = \lambda_1 f_1 \\\\ \rm v = 1.76 \times 196 \\\\ \rm v =344.96\ m/sec\)

For case 2;

\(\lambda_2 = \frac{v}{f_2} \\\\ \lambda_2 = \frac{344.96}{784} \\\\ \lambda_2=0.44\)

Hence the wavelength of a wave of the frequency is increased to 784 Hz will be 0.57 metre.

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The Doppler method can measure the eccentricity of orbit, semimajor axis of orbit, lower limit mass, and orbital period of exoplanets.

Eccentricity of orbit: The Doppler method can provide information about the eccentricity of a planet's orbit by detecting the periodic variations in the star's radial velocity caused by the planet's gravitational pull.

Semimajor axis of orbit: The Doppler method allows for the determination of the semimajor axis of a planet's orbit. By measuring the periodic changes in the star's radial velocity, scientists can infer the distance between the star and the planet, which corresponds to the semimajor axis.

Lower limit mass: The Doppler method can provide a lower limit estimate of a planet's mass. By observing the periodic variations in the star's radial velocity, scientists can calculate the minimum mass of the planet based on the gravitational influence it exerts on the star.

Orbital period: The Doppler method is particularly effective in determining the orbital period of a planet. By measuring the time it takes for the periodic changes in the star's radial velocity to repeat, scientists can accurately determine the planet's orbital period.

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Mugabe gained power by using political strategies, forming alliances, and exploiting his status as a liberation hero within ZANU-PF.

Robert Mugabe, the former president of Zimbabwe, was able to build power through a combination of political strategies and alliances. One key factor was his involvement in the liberation struggle against white minority rule in Rhodesia (now Zimbabwe).

Mugabe emerged as a prominent figure within the Zimbabwe African National Union (ZANU) party, which later merged with the Zimbabwe African People's Union (ZAPU) to form the Zimbabwe African National Union - Patriotic Front (ZANU-PF). Mugabe's role as a liberation hero and his ability to mobilize support among the majority black population of Zimbabwe gave him a strong power base.

Within ZANU-PF, Mugabe strategically positioned himself and gained influence by forming alliances and outmaneuvering rivals. He rose to become the party's leader and played a key role in negotiating the Lancaster House Agreement in 1979, which paved the way for Zimbabwe's independence in 1980. Mugabe became the country's first prime minister and later transformed the position into an executive presidency, consolidating his authority.

Mugabe maintained power through various means, including controlling key institutions such as the military, intelligence agencies, and the ruling party. He also utilized patronage networks, distributing resources and positions to loyal supporters within the party and government. Mugabe's policies, such as the controversial land reform program, further solidified his power base by appealing to nationalist sentiments and redistributing land from white farmers to black Zimbabweans.

However, Mugabe's consolidation of power was also marked by authoritarianism, human rights abuses, and a declining economy. His grip on power faced challenges over the years, including opposition movements, internal party factions, and economic crises. Ultimately, his rule came to an end in 2017 when he was ousted from power following a military intervention.

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(i) A plane wave has a small uncertainty in position and large uncertainty in momentum. A plane wave is a simple type of wave in which the wavefronts are flat or plane. It has an infinite extent in space. This means that the wave is completely spread out in space. Since a plane wave is completely spread out in space, it is not localized in position. Hence, the uncertainty in position is very small.

The momentum of a plane wave is directly proportional to its frequency. Since the plane wave has a single frequency component, it has a very specific momentum value. Hence, the uncertainty in momentum is very large.(ii) Relative to a plane wave, a wave packet has a larger uncertainty in position and smaller uncertainty in momentum.

A wave packet is a type of wave that is localized in space. It is the sum of several plane waves with different frequencies and phases. This results in a wave that is concentrated in a small region of space.The wave packet has a specific position in space. However, since it is a combination of different frequencies, it has a range of momentum values. Hence, the uncertainty in position is larger.

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Answer:

8.37757

Explanation:

may i have brainliest

Addition of vectors is done by adding the components of the vectors

The total speed of the fan  is approximately 9.43 m/s,

Direction of total wind 58° counterclockwise from the positive x-axis

The reason the value is correct is as follows:

The given parameters are:

The direction at which the fan blowing at 5 m/s is blowing = Easterly

The direction in which the fan blowing 8 m/s is blowing = Northerly

The total speed of the van, |v| ≈ 9.43 m/s

Required:

To find the total wind speed of the fans

Solution:

Taken the easterly direction as the ith component, and the northerly direction as the jth component,  the vector representing the speed of the fan is presented as follows

v = 5·i + 8·j

The magnitude of the total wind speed of the fan, |v| = √(5² + 8²) = √(89) ≈ 9.43

The total wind speed of the fan , |v| ≈ 9.43 m/s

The direction of the total speed with respect to the x-axis, θ, is given as follows;

θ = arctan(8/5) ≈ 58°

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Answer: Your weight alone can determine the percentages of your body's composition

Explanation:

C. Your weight alone can determine the percentages of your body's composition.

Body composition analysis is the assessment of the proportion of fat to fat-free mass in your body.

Performing Body Composition Assessment will tell you your own body's unique makeup and help you identify areas to work on to improve your overall health and wellness.

Thus, the statement that is NOT true about the Body Composition Assessment is your weight alone can determine the percentages of your body's composition.

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I cant see the numbers but to find them heres an example 17 n would be at the top next to 15 and 20 if there on there and them you find the other number 105 w I think would be on the left then draw a straight line till they touch and wherever it is will be you answer and if you need further help search it up on here or google

Explanation:

ok so start on the latitude which is the lines that go left to right. it would be the first number in the parentheses.(latitude,longitude) so if the number is 17°North you would look on the right side of the map and find 17°N. It might show y 15°N so you have to try and find where you think 17°N would be. place you finger where you think 17°N is. then find 105°West which is longitude and is the lines that go up and down. and drag you fingers together in a straight line until they both meet and that is where the awnser is.

hope u understand

Answer:

Point 2.

Explanation:

Potential energy is simply defined as the energy stored in an object due to its position. It is can be represented mathematically by:

P.E = mgh

Where:

P.E is the potential energy.

m is the mass of the object.

g is acceleration due to gravity.

h is the height to which the object is located.

From the above equation, we can thus say that potential energy depends on the height of the object since the mass of the object is always constant i.e as the height of the object increase, the potential energy also increases and as the height of the object decrease, the potential energy also decreases.

Now, considering the diagram in the question given, we can see that point 2 is the lowest height to which the rider is located. At this point i.e point 2, the rider will have the least potential energy.

Answer: Point 2

Explanation:

Answer:

1. Fleming's left hand rule

2. It must be projected towards the east

Explanation:

Fleming's left-hand rule states that; When a current-carrying conductor is placed in an external magnetic field, the conductor experiences a force perpendicular to both the field and to the direction of the current flow. This rule was first put forward by John Ambrose Fleming in the later part of the nineteenth century.

Hence if the thumb, fore finger and middle finger of the lefthand are held mutually at right angles to each other; the thumb shows the direction of motion, the fore finger shows the direction of the field while the middle finger shows the direction of the current.

Hence, if the alpha particle is projected eastwards(at right angles) to the uniform magnetic field, it will be deflected southwards in the magnetic field.

Answer:

MY friend has already described the purpose of projectile motion so I will quickly go through the uses of each equation ...

Explanation:

TIME OF FLIGHT = it is given as 2Usin tita/g...it is the total time taken to and fro...it is 2x of the time taken ....

TIME taken ..t= Usin tita / g.....is the time taken to reach the maximum height which is 1/2 the TOTALTIME OF FLIGHT GIVEN ABOVE ..

MAXIMUM HEIGHT: the maximum height is the height attained by the projectile when projected ...it is calculate using the formula = U^2 sin^2 tita / 2g

Range =Search Results

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An object launched into projectile motion will have an initial launch angle anywhere from 0 to 90 degrees. The range of an object, given the initial launch angle and initial velocity is found with: R=v2isin2θig R = v i 2 sin ⁡ 2 θ i g .

Answer:

give brainliest please

Explanation:

T- lymphocytes or T cells

The power generated by the falling water is approximately 10.6 megawatts. This was calculated using the formula P = mgh, with the given values for mass flow rate and height of fall.

The power generated by falling water is given by the formula P = mgh.

where m is the mass flow rate,

g is the acceleration due to gravity,

and h is the height of the fall.

Substituting the given values, we get:

P = (5.4 x 10^4 kg/s) x (9.81 m/s^2) x (20 m)

P = 10.6 x 10^6 watts

P = 10.6 megawatts

Therefore, the power generated by the falling water is approximately 10.6 megawatts.

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The average angular velocity of the lathe is 3.75 rad/s.

First, we can find the final angular velocity of the lathe at the end of the constant velocity phase by using the kinematic equation:

ωf = ωi + αt

where ωi is the initial angular velocity (which is zero in this case), α is the angular acceleration (\(0.60 rad/s^2)\), and t is the time it takes to reach the constant velocity (10 s):

ωf = 0 + 0.60 rad/s^2 * 10 s = 6.0 rad/s

Next, we can use the constant velocity phase to find the total angle turned by the lathe during this period, which is given by:

θ2 = ω * t2

where ω is the constant angular velocity during this period (which is also 6.0 rad/s) and t2 is the time period (20 s):

θ2 = 6.0 rad/s * 20 s = 120 rad

Finally, we can use the deceleration phase to find the total angle turned by the lathe during this period, which is given by:

θ3 = ωf * t3 + (1/2) * (-α) * t3^2

where ωf is the final angular velocity (6.0 rad/s), α is the angular deceleration (-0.60 rad/s^2), and t3 is the time period (10 s):

θ3 = 6.0 rad/s * 10 s + (1/2) * (-0.60 rad/s^2) * (10 s)^2 = 30 rad

The total angle turned by the lathe is therefore:

Δθ = θ1 + θ2 + θ3 = 0 + 120 rad + 30 rad = 150 rad

The total time taken by the lathe is:

Δt = t1 + t2 + t3 = 10 s + 20 s + 10 s = 40 s

Therefore, the average angular velocity of the lathe is:

ω_avg = Δθ / Δt = 150 rad / 40 s = 3.75 rad/s

So the average angular velocity of the lathe is 3.75 rad/s.

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Full  Question: A lathe, initially at rest, accelerates at 0.60 rad/s^2 for 10 s, then runs at a constant angular velocity for 20 s, and finally decelerates uniformly for 10 s to come to a complete stop. What is its average angular velocity?

Answer:

B and C

Explanation:

Energy is simply defined as the capacity to do work and according to the law of conservation of energy (first law of thermodynamics), energy can neither be created nor destroyed but can, however, be converted from one form to another.

An object can have more than one form of energy at a time. For example, a moving object possesses kinetic energy and can also possess heat energy due to the heat generated while overcoming frictional force.

Option A negates the law of conservation of energy while option D is grossly incorrect.

The correct options are B and C.

Answer:

can be used to generate a magnetic effect ( magnetic field ) or magnetism can be generated by electricity , There is a relation between magnetism and electricity , where electric current has a magnetic effect , while  magnet generates an electric current .The electromagnet is used in factories to move ( lift ) the heavy iron blocks as it is used for making big-sized winch ( crane ) .The electromagnet is used in making many appliances ( devices ) as the electric bell , the electric mixer , the disc drive and the television .The electromagnet is used in factories to move ( lift ) the heavy iron blocks as it is used for making big-sized winch ( crane ) .The electromagnet is used in making many appliances ( devices ) as the electric bell , the electric mixer , the disc drive and the television .

Explanation:

Mrs. Suki is looking for a material to place on the floor under the preschooler's cubbies that will reduce the momentum of a dropped lunch box and prevent it from breaking.

A preschooler's cubby is a small, personal storage space designed for children to store their belongings at school, daycare, or a similar educational setting. It is typically an open shelf or cabinet with multiple compartments for each child to store their items.

Based on her testing, she found that Material #1 is the best option because it causes the lunch box momentum to decrease to 0 in the shortest amount of time, 1 second. Material #2 is a good option too, but it takes 2 seconds for the momentum to decrease to 0, which is slightly longer than Material #1. Therefore, Material #1 is the best choice for reducing the momentum of a dropped lunch box and keeping it from breaking.

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The velocity of the mass after the force has stopped acting is 14 m/s.

The velocity of an object is the speed at which the object is moving in a specified direction.

Momentum is related to velocity and mass by the formula:

The velocity of the mass after 8 seconds is first determined.

Change in linear momentum = (1/2 × 2 × 6) + (6 × 4) + (1/3 ×2 × 6) = 36 kgm/s

Initial momentum = 18 kg × 12 m/s = 216 kgm/s

Final momentum = 216 + 36 = 252 kgm/s

Final Velocity = final momentum/mass

Velocity = 252/18 = 14 m/s

After 8 seconds, the force stops acting.

Therefore, the velocity of the mass after the force has stopped acting is 14 m/s.

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The mass of the box is 13.6 kg. We can use Newton's second law of motion to solve this problem: F = ma where F is the net force acting on the box.

A horizontal force of magnitude 43.5 N is applied to a box on a frictionless surface. We can start by applying Newton's second law of motion, which states that the net force acting on an object is equal to the product of its mass and acceleration: F = ma

where F is the net force, m is the mass, and a is the acceleration. In this case, we know the force and the acceleration, so we can solve for the mass: m = F/a

Plugging in the values we were given, we get:

\(m = 43.5 N / 3.20 m/s^2\\\)

Simplifying this expression, we get:

m = 13.6 kg

Therefore, the mass of the box is 13.6 kg.

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Answer:

1)  10 kg-m/s

2)  2 kg

3)  20 m/s

Explanation:

The momentum of an object can be calculated using the equation:

\(\large\boxed{p=mv}\)

where:

\(\hrulefill\)

For this question we need to find the momentum of a bowling ball whose mass is 4.0 kg is rolling at a rate of 2.5 m/s.

Given values:

Substitute the given values into the momentum formula and solve for p:

\(p=4.0\;\text{kg} \cdot 2.5\;\text{m/s}\)

\(p=10\;\text{kg m/s}\)

Therefore, the momentum of the bowling ball is 10 kg-m/s.

\(\hrulefill\)

For this question we need to find the mass of a skateboard rolling at a velocity of 3.0 m/s with a momentum of 6.0 kg-m/s.

Given values:

As we want to find mass, rearrange the momentum formula to isolate m:

\(\large\boxed{m=\dfrac{p}{v}}\)

Substitute the given values into the formula and solve for m:

\(m=\dfrac{6.0\; \text{kg m/s}}{3.0\; \text{m/s}}\)

\(m=2\;\text{kg}\)

Therefore, the mass of the skateboard is 2 kg.

\(\hrulefill\)

For this question we need to find the velocity of a baseball with a mass of 0.5 kg and a momentum of 10 kg-m/s.

Given values:

As we want to find velocity, rearrange the momentum formula to isolate v:

\(\large\boxed{v=\dfrac{p}{m}}\)

Substitute the given values into the formula and solve for v:

\(v=\dfrac{10\; \text{kg m/s}}{0.5\; \text{kg}}\)

\(v=20\;\text{m/s}\)

Therefore, the velocity of the baseball is 20 m/s.

Explanation:

It"s B i think i've might be wrong??

The period of a pendulum, which is the amount of time it takes to complete one full cycle of back-and-forth motion, is determined by its length and the strength of gravity acting upon it.

The value of acceleration due to gravity (g) on a celestial body can be determined by using the formula, g=4π²L/T², where L is the length of the pendulum and T is the time period. Given that the length of the pendulum on Zithor is 2.0 m and the time period is 2.8 seconds,

we can calculate the value of g as follows:Let's substitute the given values in the formula: g=4π²L/T²=4π²*2.0 m/(2.8 s)²= (4*3.14²*2.0)/7.84= 6.12 m/s²Thus, the value of acceleration due to gravity on Zithor is 6.12 m/s². A pendulum is a weight suspended from a pivot so that it can swing freely. It consists of a mass that is suspended from a fixed point and is permitted to swing back and forth under the influence of gravity. The period of a pendulum, which is the amount of time it takes to complete one full cycle of back-and-forth motion, is determined by its length and the strength of gravity acting upon it.

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A new measure of depression correlates very poorly with a new measure of happiness. it is likely that the new measure of depression has good criterion validity.

Cortisol levels in the hippocampus rise as a result of depression, which inhibits neural growth in the brain. The decline in function of the damaged part is closely correlated with the atrophy of brain circuits. The amygdala grows as a result of elevated cortisol levels, while other cerebral regions shrink.

A depression can permanently harm the brain, causing long-term memory loss and concentration problems in addition to making a person feel sad and depressed. Up to 20% of those who suffer from depression never fully recover. Depression makes dangerous behaviors, including drug or alcohol addiction, more likely.

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The change in the momentum was found to be 16,000 kgm/s

Change in momentum ?

Situations involving impulse and momentum are all around us, whether we notice it or not. Before we begin evaluating these daily instances, we'll go over the fundamental ideas of impulse and momentum.

In physics, an impulse (Ft) is a force (F) operating over a certain time (t) that results in a change in momentum (p) of an object. The impulse-momentum theorem is the equation of impulse with the change in momentum.

the change in the momentum was Δp=mxΔv

Δp=2000x8

Δp=16,000 kgm/s

therefore the change in momentum was found to be 16,000kgm/s

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Explanation:

I don't understand this question

could you please explain

Explanation:

Well ball on ramp .Which factors are affected?

So if we put the ball right above the centre of mass it can be best stabled

A low energy photon hits the electron in the image therefore the photon will bounce off the electron if the energy is below the threshold for absorption.

This is referred to as a particle representing a quantum of light or other electromagnetic radiation and it carries energy proportional to the radiation frequency but has zero rest mass.

When the electron changes levels, it decreases energy and the atom emits photons. The photon is emitted with the electron moving from a higher energy level to a lower energy level and bounces of if the energy is below the threshold for absorption.

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The actual rotor speed of the motor is 1140 rpm, which is the answer given in option C.

The speed of a synchronous motor is given by the formula:

Ns = 120f / p

where:

Ns = synchronous speed of the motor in revolutions per minute (rpm)

f = frequency of the power supply in hertz (Hz)

p = number of poles of the motor

For a 6-pole motor supplied at 60 Hz, the synchronous speed is:

Ns = 120 * 60 / 6 = 1200 rpm

However, due to various losses, the actual speed of a motor is always less than the synchronous speed. The difference between the synchronous speed and the actual speed is known as the slip. The slip is usually expressed as a percentage of the synchronous speed.

The formula for calculating the actual rotor speed of a motor is:

Nr = (1 - s) * Ns

where:

Nr = actual rotor speed of the motor in rpm

s = slip of the motor as a fraction of the synchronous speed

Ns = synchronous speed of the motor in rpm

In this case, the slip is given as 5% of the synchronous speed. Therefore:

s = 0.05

Ns = 1200 rpm

Substituting these values in the formula for actual rotor speed, we get:

Nr = (1 - 0.05) * 1200 = 1140 rpm

Hence, the actual rotor speed of the motor is 1140 rpm, which is the answer given in option C.

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