figure 2-35 shows the speed v versus height y of a ball tossed directly upward, along a y axis. distance d is 0.40 m. the speed at height ya is va.the speed at height yb is va. what is speed va?

A force of 180lb is needed to stretch the spring 9in beyond its natural length.

Fs = kx is the equation for Hooke's Law.

We can use this formula to solve your problem. we can find the spring constant k by dividing the force by the distance:

k = F/s = 120lb/6in = 20lb/in

Now we can use this value of k to find out how much force is needed to stretch the spring 9in beyond its natural length:

F = ks = 20lb/in * 9in = 180lb

A force in physics is an effect that causes the motion of an object with mass to alter its velocity (e.g., moving from a state of rest), i.e., to accelerate. It can be a push or a pull, but it always has magnitude and direction, making it a vector quantity. It is measured in newtons (N) and is symbolized by the sign F (previously P).

The original phrasing of Newton's second law says that the net force exerted on an item is equal to the rate at which its momentum changes over time. If the item's mass remains constant, this rule means that the acceleration of an object is precisely proportional to the net force applied on the object.

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Answer:

300 Hz.

Explanation:

The frequency of a sound wave is the same as that of the source. For example, a tuning fork vibrating at a given frequency would produce sound waves that oscillate at the same frequency.

The frequency that you will hear when the tuning fork is stuck against a table is 300 Hz.

Frequency is a measurement of how often a repetitive event occurs in a given amount of time. It is commonly used to describe the rate at which waves oscillate or vibrate. The unit of frequency is hertz (Hz), which represents the number of cycles or oscillations per second.

For example, in the case of sound waves, frequency is related to the pitch of the sound. Higher frequency sound waves have a higher pitch, while lower frequency sound waves have a lower pitch. Similarly, in the case of electromagnetic waves such as light, frequency is related to the color of the light. Higher frequency electromagnetic waves correspond to colors such as blue and violet, while lower frequency electromagnetic waves correspond to colors such as red and orange.

The relationship between frequency, wavelength, and the speed of the wave is given by the formula:

frequency = speed of the wave / wavelength

This formula shows that the frequency of a wave is inversely proportional to its wavelength, assuming the speed of the wave remains constant. In other words, as the wavelength of a wave increases, its frequency decreases, and vice versa.

Frequency is an important concept in many fields, including physics, engineering, and communications. It is used to describe and analyze a wide range of phenomena, from the behavior of sound and light waves to the performance of electronic circuits and systems.

Here in the Question,

When a tuning fork is struck against a table, it vibrates at its natural frequency, which is determined by its physical properties such as its mass, shape, and material. The vibration of the tuning fork creates sound waves that travel through the air, and our ears perceive these waves as sound.

The frequency of the sound that we hear depends on the frequency of the sound waves that reach our ears. When the sound waves from the tuning fork travel through the air, they undergo a phenomenon called the Doppler effect, which causes the frequency of the sound waves to change depending on the relative motion between the source of the sound waves (the tuning fork) and the observer (our ears).

If the tuning fork is stuck against a table and is not moving relative to the observer, the frequency of the sound waves that reach our ears will be the same as the natural frequency of the tuning fork, which is given as 300 Hz in this case.

Therefore, the frequency that you will hear when the tuning fork is stuck against a table is 300 Hz.

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With 4.3 m/s velocity, is the cheetah running.

velocity= distance/time

distance=27.6 m

time=6.3 s

velocity=27.6 m/6.3 s

velocity=4.3 m/s

A vector number known as velocity describes "the pace at which an item changes its location." Imagine a person moving quickly, taking one stride ahead, one step back, and then beginning from the same place each time. A vector quantity is velocity. As a result, velocity is aware of direction. One must consider direction while calculating an object's velocity. Saying that an item has a velocity of 55 miles per hour is insufficient. The direction must be included in order to adequately characterize the object's velocity. Simply said, the velocity vector's direction corresponds to the motion of an item.

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Answer:

:Meterology, Seismology,

Answer:

Social media has helped many businesses grow and promote itself, and has helped people find a better way to connect and communicate with one another. On the other hand, it's also provided many people with problems involving mental health, emotional insecurities, and waste of time

Explanation:

what they said is correct

Albert Einstein's 1905 theory of special relativity is one of the most important papers ever published in the field of physics. Special relativity is an explanation of how speed affects mass, time and space.

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Answer:  its C- Albert Einstein

Explanation: the person above me is right and I also got it right on the test.

Answer:

b. between 2 s and 4 s

Explanation:

2-4 was both 3m/s

The two-neuron chain allows increased communication and control of the effector organ is true.

Preganglionic and postganglionic neurons make up the link in the ANS between the CNS and its effector. Outside of the central nervous system, in an autonomic ganglion, is where these two neurons synapse.

The two-neuromuscular chain enables improved communication and regulates the effector organ. The sympathetic division is where the cell bodies of preganglionic neurons are found.

The brainstem or spinal cord of the central nervous system houses the preganglionic neurons' cell bodies (CNS).

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Answer:

Explanation:

v = 9.8 yd/sec

t = 10 sec

d = ??

You really don't have to do any conversions. Football distances are measured in yards.

d = r * t

d = 9.8 * 10.2

d = 99.96 yards

I think I would round that to 100 yards.

The electromagnetic spectrum consists of various types of radiation that differ in their frequency and wavelength. Radio waves have the longest wavelength and the lowest frequency among all types of electromagnetic radiation. They are used in communication systems such as radios, televisions, and cell phones. They can also be used in medical imaging to create images of the human body.

On the other hand, ultraviolet radiation has a much higher frequency than radio waves. It has shorter wavelengths and is invisible to the human eye. It is commonly known for its harmful effects on the skin, such as sunburn and skin cancer. However, it can also be used in disinfection, sterilization, and curing of materials.

Therefore, the answer to the question is radio waves, as they have the lowest frequency among the two options. It is important to understand the different types of electromagnetic radiation and their uses to appreciate their role in our daily lives.

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Answer:

a

Explanation:

f=ma

200=2*m

divide both sides by 2

m=100

When the balloon comes in contact with the tissue paper  it will stick to the balloon because the tissue paper is positively charged.

Static electricity is the electrical current generated when a negatively charged material polarize other material temporarily. When a material is rubbed with a conducting surface it will gain electrons and become s negatively charged.

When this negatively charged body comes in contact with a nonpolar material, The non-polar one will be polarized partially and its positive charges will allocate near the negative charges.

When the balloon is rubbed on a wool it gans negative charges and the electrons from the balloon tends to attract the positive pole of the tissue paper and the paper will stick on it. Thus, option B is correct.

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The relative density of the soil deposit in the field is approximately 0.52.

To find the relative density of the soil deposit in the field, we can use the following equation:

Dr = (emax - e) / (emax - emin) * (Gs - 1) / (G - 1)

Where:

Dr = relative density

emax = maximum void ratio

emin = minimum void ratio

Gs = specific gravity of soil solids

G = in-situ effective specific gravity of soil

To solve the problem, we need to determine the value of G. One way to do this is by using the following equation:

G = (1 + e) / (1 - w)

Where:

e = void ratio

w = water content

Since we don't have the values of e and w for the soil deposit in the field, we cannot directly use this equation. However, we can make some assumptions about the water content and use the given dry unit weight to estimate the in-situ effective specific gravity of soil.

Assuming a water content of 10%, we can calculate the in-situ effective specific gravity of soil as follows:

G = (1 + e) / (1 - w)

1.49 = (1 + e) / (1 - 0.1)

e = 0.609

Assuming a saturated unit weight of 1.8 g/cm3, we can estimate the specific gravity of soil solids as follows:

Gs = (1.8 / 9.81) + 1

Gs = 1.183

Now we can plug in the values into the first equation to calculate the relative density:

Dr = (emax - e) / (emax - emin) * (Gs - 1) / (G - 1)

Dr = (0.89 - 0.609) / (0.89 - 0.48) * (1.183 - 1) / (2.66 - 1)

Dr = 0.52

Therefore, the relative density of the soil deposit in the field is approximately 0.52.

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Answer:

The net force = 0

Explanation:

The given information includes;

The mass of the crate = 250 kg

The way the helicopter lifts the crate = Uniformly (constant rate (speed), no acceleration)

In order to pull the crate upwards, the helicopter has to provide a force equivalent to the weight of the crate keeping the helicopter on the ground.

The weight of the crate = The mass of the crate × The acceleration due gravity acting on the crate

The weight of the crate, \(F_w\)↓ = 250 kg × 9.81 m/s² = 2,452.5 N

The force the helicopter should provide to just lift the crate, \(F_{(helicopter)}\)↑ = The weight of the crate = 2,452.5 N

The net force, \(F_{(net)}\) = \(F_{(helicopter)}\)↑ - \(F_w\)↓ = 2,452.5 N - 2,452.5 N = 0

The net force = 0.

Answer:

1.5 m/s²

Explanation:

Applying,

a = (v-u)/t ...................... Equation 1

Where a = acceleration of the particle, v =  final velocity of the particle, u = Initial velocity of the particle, t = time.

From the question,

Given: u = 0 m/s (From rest), v = 15 m/s, t = 10 seconds

Substitute these values into equation 1

a = (15-0)/10

a = 15/10

a = 1.5 m/s²

Using the free body diagram, let's determine the scenario the diagram illustrates.

From the free body diagram, we can see that the weight is acting on the object while the tension will be the force which supports the object.

The tension in this case, helps hang the object while the weight is the product of the mass of the object and the force of gravity acting on the object.

Tension can be defined as the pulling force transmitted through a rope or string.

Therefore, the best scenario which is represented by the free body diagram is a sign board supported by two strings.

ANSWER:

A signboard supported by

The mass of Deimos is approximately 9.52 x 10^15 kg.

To find the mass of Deimos, we can use the formula for gravitational force:F = G * (m1 * m2) / r^2. where F is the gravitational force between two objects, G is the gravitational constant, m1 and m2 are the masses of the two objects, and r is the distance between their centers of mass.

In this problem, we know the radius of Deimos (r = 6.3 km = 6.3 x 10^3 m), the mass of the rock on its surface (m1 = 3.0 kg), and the gravitational force between them (F = 2.5 x 10^-2 N). We can also look up the value of G: G = 6.674 x 10^-11 N(m/kg)^2.

We want to solve for the mass of Deimos (m2). Rearranging the formula, we get: m2 = (F * r^2) / (G * m1). Substituting the given values, we get: m2 = (2.5 x 10^-2 N) * (6.3 x 10^3 m)^2 / (6.674 x 10^-11 N(m/kg)^2 * 3.0 kg). m2 = 9.52 x 10^15 kg.Therefore, the mass of Deimos is approximately 9.52 x 10^15 kg.

It is worth noting that this calculation assumes that the rock on Deimos' surface is not affecting its orbit significantly. In reality, the gravitational force between the rock and Deimos would cause some perturbations in Deimos' orbit, but they are likely to be very small due to the small mass of the rock compared to Deimos.

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To find the mass of Deimos, we can use the gravitational force formula:
F = G * (m1 * m2) / r^2

Where F is the gravitational force (2.5 * 10^(-2) N), G is the gravitational constant (6.674 * 10^(-11) Nm^2/kg^2), m1 is the mass of Deimos (which we want to find), m2 is the mass of the rock (3.0 kg), and r is the distance between their centers, which is equal to Deimos' radius (6.3 km or 6300 m).

Rearranging the formula to solve for m1 (the mass of Deimos):

m1 = (F * r^2) / (G * m2)

m1 = (2.5 * 10^(-2) N * (6300 m)^2) / (6.674 * 10^(-11) Nm^2/kg^2 * 3.0 kg)

After calculating, we find that the mass of Deimos is approximately 1.0 * 10^15 kg.

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a) The gravitational force is 1.7 * 10^4 N.

b) The acceleration due to gravity is 277 m/s^2.

We know that the gravitational force is the force of attraction that acts in the universe between any two masses that are close to each other. We can see that we have the following information;

Mass of the sun =  2 x 10^30 kg

Mass of the person = 60 kg

Radius of the sun = 695,700 km or 695,700000 m

Force of gravity = Gm1m2/r^2

G = gravitational constant

m1 = mass  of the sun

m2 = mass of the person

r = radius of the sun

Hence;

F = 6.67 x 10^-11 * 2 x 10^30  * 60/( 695,700000)^2

F =  8 * 10^21 /4.8 * 10^17

F = 1.7 * 10^4 N

The acceleration due to gravity is gotten from;

g = Gm/r^2

g = 6.67 x 10^-11 * 2 x 10^30/( 695,700000)^2

g = 1.33 * 10^20/4.8 * 10^17

g = 277 m/s^2

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Answer:

hope this answer will help you

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Answer:

a 15.6voltz

i Hope this helps

Answer:   Natural stone

Explanation:

Answer:

Natural stone

Explanation:

The most common natural stones used to make countertops include granite, marble, soapstone, and slate.

Matter is anything that has mass and occupies space, and it comes in three main states: solids, liquids, and gases. The state of matter of a material depends on how fast its particles move and how strong the attraction is between its atoms and molecules. Let's take a look at each state of matter and how these factors influence them.

Solids: In a solid, the particles are tightly packed together and have very little room to move. The attraction between atoms and molecules is very strong, which means they vibrate in place but cannot move around freely. This is why solids have a fixed shape and volume.
Liquids: In a liquid, the particles are more spread out than in a solid, but they are still in close contact with each other. The attraction between atoms and molecules is weaker than in a solid, which means they are able to move around more freely. This is why liquids have a fixed volume but not a fixed shape.
Gases: In a gas, the particles are very spread out and have a lot of room to move around. The attraction between atoms and molecules is very weak, which means they can move around freely. This is why gases have neither a fixed shape nor a fixed volume.
The state of matter of a material can also change depending on external factors like temperature and pressure. For example, if you increase the temperature of a solid, it can become a liquid, and if you increase the temperature of a liquid, it can become a gas. Similarly, if you decrease the pressure on a gas, it can become a liquid, and if you decrease the pressure on a liquid, it can become a solid.
In conclusion, the state of matter of a material depends on how fast its particles move and how strong the attraction is between its atoms and molecules. Solids have the strongest attraction, followed by liquids, and then gases. The state of matter can also change depending on external factors like temperature and pressure.

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Answer:

Analytical

Explanation:

The power of the motor is 1333.33 watts or 1.33 kilowatts (kW).

The work done by the electric motor in lifting the roller coaster car to the top of the hill is given by the product of the force applied and the distance moved in the direction of the force:

Work = Force x Distance

The force applied by the motor is the weight of the roller coaster car, which is 10,000 N. The distance moved in the direction of the force is the height of the hill, which is 20 m.

So, the work done by the motor is:

Work = Force x Distance

= 10,000 N x 20 m

= 200,000 J

The time taken for the motor to do this work is 150 seconds. The power of the motor is the rate at which it does work, or the work done per unit time. So, the power of the motor is:

Power = Work / Time

= 200,000 J / 150 s

= 1333.33 W

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Answer:

It is 32.9

Explanation:

The term Young Modulus is used to describe the stress to strain of a material.  and is a measure of the strength of a material.

The term Young Modulus is used to describe the strength of a material. It is a ratio of the stress to strain of a material. The unit of Young Modulus is N/m2.

The question is incomplete hence the average Young's modulus, in units N/m2 can  not be computed. This value helps an engineer to make decision regarding the use of materials for construction.

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Answer:

2519.63 kg

Explanation:

mass(m)=momentum (p)/velocity

=77000/30.56

=2519.63kg

The mass of ball 1 is 0.43 kg.

The mass of ball 1 is calculated by applying the principle of conservation of linear momentum as shown below.

m₁u₁  +  m₂u₂ = m₁v₁  + m₂v₂

where;

99m₁ + 0.55 (0) = m₁(0) + 0.55 (78 )

99m₁  = 42.9

m₁  = 42.9 / 99

m₁  = 0.43 kg

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