a tennis player swings her 1000 g racket with a speed of 15.0 m/sm/s . she hits a 60 g tennis ball that was approaching her at a speed of 17.0 m/sm/s . the ball rebounds at 35.0 m/sm/s .
A) How fast is her racket moving immediately after the impact? You can ignore the interaction of the racket with her hand for the brief duration of the collision.
_________m/s
B) If the tennis ball and racket are in contact for 7.00, what is the average force that the racket exerts on the ball?
_________N

The energy required to move a 6400 kg truck traveling at 100 m/s is 32,000,000 joules (J).

To calculate the energy required to move a 6400 kg truck traveling at 100 m/s, we need to find its kinetic energy. The formula for kinetic energy is KE = 0.5 * m * v^2, where KE is the kinetic energy, m is the mass of the truck, and v is its velocity. The unit for energy is joules (J).

Explanation:
Step 1: Identify the mass (m) and velocity (v) of the truck.
m = 6400 kg
v = 100 m/s

Step 2: Plug the values into the kinetic energy formula.
KE = 0.5 * m * v^2
KE = 0.5 * 6400 kg * (100 m/s)^2

Step 3: Calculate the kinetic energy.
KE = 0.5 * 6400 kg * 10000 m^2/s^2
KE = 3200 kg * 10000 m^2/s^2
KE = 32,000,000 J

The energy required to move a 6400 kg truck traveling at 100 m/s is 32,000,000 joules (J).

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Answer:

Acceleration = 5m/s² Southeast

Explanation:

Given the following data;

Final velocity = 10 m/s

Time = 2secs

To find acceleration;

In physics, acceleration can be defined as the rate of change of the velocity of an object with respect to time.

This simply means that, acceleration is given by the subtraction of initial velocity from the final velocity all over time.

Hence, if we subtract the initial velocity from the final velocity and divide that by the time, we can calculate an object’s acceleration.

Mathematically, acceleration is given by the equation;

\(Acceleration (a) = \frac{final \; velocity - initial \; velocity}{time}\)

\(a = \frac{v - u}{t}\)

Where,

a is acceleration measured in \(ms^{-2}\)

v and u is final and initial velocity respectively, measured in \(ms^{-1}\)

t is time measured in seconds.

We know that Initial velocity = 0m/s

Substituting into the equation, we have;

\(a = \frac{10 - 0}{2}\)

\(a = \frac{10}{2}\)

Acceleration = 5m/s² Southeast.

Answer:

Answer:

Debt payments to income ratio = 22.74%

Explanation:

Debts payment to Income ratio is calculated as follows:

= \frac{Total\ debt\ payment}{Total\ Income}

Total Income

Total debt payment

We have total debts payment = auto loan payment 685 + student loan payment685+studentloanpayment375 + credit card payment 125 =125=1,185

Total Income = $5,210

Note: Credit card is also a kind of debt as firstly all the expenses are met during the period and then the payment is made at the end of the period, therefore, there is a loan in the period. Therefore, it will be considered for payment of debt.

Debt payments to income ratio = \frac{1,185}{5,210} = 22.74

5,210

1,185

=22.74

That means the debts are 22.74% of income.

The given statement "in a pitch situation, a vehicle's weight moves to either the right or left of the vehicle" is false because, in a yaw situation, a vehicle weight moves to either the right or left around the center of gravity.

The Society of Automotive Engineers (SAE) describes Vehicle Dynamics as the relationship between the forces exerted on a vehicle and the resulting motion. Three important motions of a vehicle are pitch, yaw, and roll.

Thus, when a vehicle's weight moves either to right or left of the vehicle, it indicates a yaw situation.

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Girl u in the same class as me I need help too.

Answer:

I know I'm late but...

Explanation:

A mixture is the combination of two or more substances together. And I'm pretty sure that a mixture has no chemical substances. And mixtures can be physically separated.

Hope this helps you!

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The speed of the block after the bullet embeds itself in the block is approximately 3.33 m/s.

To solve this apply the principle of conservation of momentum. Before the collision, the momentum of the bullet is (0.1 kg) * (100 m/s) = 10 kg m/s. After the collision, the bullet becomes embedded in the block, so the combined mass of the bullet and block is (0.1 kg + 3 kg) = 3.1 kg. speed of the block after the collision is v.

The momentum before the collision is equal to the momentum after the collision:

(0.1kg)*(100m/s)=(3.1 kg)*v

v=(0.1kg*100m/s)/3.1kg≈3.2m/s

Therefore, the speed of the block after the bullet embeds is approximately 3.33m/s.The kinetic energy of the bullet plus the block before the collision, consider the kinetic energy of the bullet and the block separately.

The kinetic energy of an object is given by the equation:

KE = (1/2)*mass*velocity^2

KE_bullet = (1/2)*(0.1 kg)*(100 m/s)^2 = 500J

The kinetic energy of the block before the collision is zero since it is at rest.

Therefore, the total kinetic energy is 500 J.

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Answer:

37.33m

Explanation:

To calculate the distance using d= 1/2 at², the time taken for this projectile object (ball) must be calculated.

Time of a projectile = 2u sinθ/ g

Where u = velocity = 27m/s

g = 9.8m/s²

θ = 30°

T = 2usinθ/ g

T = 2 × 27 × sin 30°/9.8

T = 54sin30°/9.8

T = 27/9.8

T = 2.755

T = 2.76s

If the time taken for the ball to move is 2.76s, the distance travelled is:

D = 1/2at²

D = 1/2 × 9.8 × 2.76²

D = 1/2 × 9.8 × 7.6176

D = 74.65248/2

D = 37.33m

The horizontal distance the ball travels is 37.33m

The horizontal distance travel by ball is 37.32 meters.

First we have to calculate time of projectile,

               \(Time=\frac{2usin\theta}{g}\)

Where g is acceleration due to gravity and u is velocity.

Given that, \(u=27m/s, \theta=30\)

Substitute values in above relation.

       \(Time=\frac{2*27*sin30}{9.8}=\frac{2*27*0.5}{9.8}=2.76s\)

The horizontal distance is given by,

              \(d=\frac{1}{2}gt^{2}\\ \\ d=\frac{1}{2}*9.8*(2.76)^{2} \\\\d=37.32m\)    

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Answer: The particles of a solid are [generally] closest together while those of a gas are farthest apart

Explanation:

Complete Question

The diagram for this question is shown on the first uploaded image

Answer:

\(x = 4.70 \ m\)     ,   \(y = 0.2803 \ m\)

Explanation:

From the question we are told that

     The initial velocity of the arcade ball is  \(u = 7.0 \ m/s\)

     The time taken by the ball to enter the basket is  \(t = 0.95 \ s\)

Generally the x -component of the initial  velocity is  

            \(u_x = 7 * cos (45)\)    

=>         \(u_x = 4.95 \ m/s\)

Generally the y -component of the initial  velocity is  

            \(u_x = 7 * sin(45)\)    

=>         \(u_y = 4.95 \ m/s\)

  Generally the distance x is mathematically represented as

                 \(x = u_x * t\)

=>              \(x = 4.95 * 0.95\)      

=>              \(x = 4.70 \ m\)    

Generally from kinematic equation the distance y is mathematically represented as

               \(y = u_y * t - \frac{1}{2} * g * t^2\)

=>            \(y = 4.95 * 0.95 - \frac{1}{2} * 9.8 * 0.95^2\)

=>            \(y = 0.2803 \ m\)

The period of a wave is the time it takes for one complete wave to pass a fixed point. We are given that 4 complete waves pass a fixed point in 10 seconds.

To find the period, we can divide the total time by the number of complete waves:  10 seconds ÷ 4 waves = 2.5 seconds per wave


To determine the period of a water wave, we need to know how much time it takes for one complete wave to pass a fixed point. In this case, 4 complete waves pass in 10 seconds.

Step 1: Find the time it takes for one complete wave to pass.
Divide the total time (10 seconds) by the number of complete waves (4 waves).

10 seconds / 4 waves = 2.5 seconds

Step 2: Identify the corresponding answer choice.
The period of the water wave is 2.5 seconds, which corresponds to answer choice C.

Your answer: C: 2.5 s

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To reduce the RLC circuit by a factor of 1 or 10, you can modify the resistance, inductance, and capacitance components of the circuit by using resistors, inductors, and capacitors with lower values that correspond to the desired reduction factors.

For resistance reduction, you can use resistors with lower resistance values. Resistors are readily available in a range of values, allowing you to select one that suits your desired reduction factor. For example, if you want to reduce the resistance by a factor of 1, you can simply replace the existing resistor with one of the same value. To achieve a reduction by a factor of 10, you would replace the resistor with one that has ten times lower resistance.

To modify the inductance of the circuit, you can utilize inductors with different inductance values. Inductors are commonly labeled with their inductance values in Henrys (H). By selecting an inductor with a lower inductance value, you can achieve a reduction in the inductance of the circuit. Again, you would choose an inductor that corresponds to the desired reduction factor.

For adjusting the capacitance, capacitors with different capacitance values are employed. Capacitors are usually labeled with their capacitance values in Farads (F). By using capacitors with lower capacitance values, you can reduce the capacitance in the circuit. Similarly, you would select a capacitor that corresponds to the desired reduction factor.

In conclusion, to reduce the RLC circuit by a factor of 1 or 10, you can modify the resistance, inductance, and capacitance components of the circuit by using resistors, inductors, and capacitors with lower values that correspond to the desired reduction factors.

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The statement 'CO2 is removed from the atmosphere, and O2 is released' describes the redox reaction involved in photosynthesis. It is a redox reaction.

Photosynthesis refers to a series of reactions by which plants can produce simple carbohydrates by using solar radiation and oxygen (O2).

These photosynthetic reactions are well known to release carbon dioxide (CO2) into the atmosphere.

During Photosynthesis, CO2 is reduced to simple carbohydrates (e.g., glucose), while water (H2O) is oxidized to O2, thereby producing a redox reaction.

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The model represents a compound, therefore the correct answer is option A.

A chemical compound is a combination of two or more either similar or dissimilar chemical elements.

For example, H₂O is a chemical compound made up of two oxygen atoms and a single hydrogen atom.

A single carbon atom is covalently joined to two oxygen atoms to form the chemical molecule known as carbon dioxide or CO2.

Animals exhale it, and plants use it in the process of photosynthesis. Under normal conditions of pressure and temperature, carbon dioxide, or CO2, is a gas.

Thus, the model represents a compound, therefore the correct answer is option A.

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ANSWER:

6500 pounds

STEP-BY-STEP EXPLANATION:

To know the answer, we must first know the equivalence between tons and pounds, since it is the only way they can be added.

We know that 1 ton equals 2000 pounds, therefore:

Answer:

a semi truck

Explanation:

A chemical structure of a molecule includes the arrangement of atoms and the chemical bonds that hold the atoms together. The 2-HEPTANONE molecule contains a total of 21 bond(s) There are 7 non-H bond(s), 1 multiple bond(s), 4 rotatable bond(s), 1 double bond(s) and 1 ketone(s) (aliphatic).

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The transverse tubule (T-tubule) system of the sarcolemma in striated muscles is an invagination of the plasma membrane that runs perpendicular to the myofibrils. The T-tubules are important in transmitting action potentials deep into the muscle fiber, allowing for synchronous contraction.

The T-tubules are closely associated with the sarcoplasmic reticulum (SR), which is a specialized smooth endoplasmic reticulum that stores calcium ions (Ca2+) and releases them upon muscle stimulation. The SR surrounds each myofibril, and the T-tubules form triads with the two SR cisternae flanking each T-tubule.

During muscle contraction, the action potential traveling down the T-tubule activates voltage-gated Ca2+ channels in the adjacent SR membrane, leading to the release of Ca2+ into the cytoplasm. The Ca2+ binds to troponin, triggering a conformational change in the thin filaments and allowing myosin to bind to actin, leading to muscle contraction.

Therefore, the close association of the T-tubule system and the SR is essential for the initiation and regulation of muscle contraction.

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Answer:

30hz is the answer for the question

The frequency  of the wave is the number of waves per second. Thus its unit is s⁻¹ which is equivalent  the unit Hertz. Thus, 30 s⁻¹  is 30 Hz.

Frequency by definition is the number  of events occurred per unit time. The frequency of a wave is the number of wave cycles per unit time. It is the inverse of time period.

Frequency of a wave is inversely proportional to the wavelength and directly proportional to the energy. Hence, as frequency increases, energy of the wave increases.

Since frequency is the  inverse time period it has the unit of frequency is s⁻¹ . s⁻¹  is equivalent to one Hz. Therefore, a wave frequency of 30 s⁻¹  is equal to 30 Hz.

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The object would have a momentum of about 1620 Kg m/s.

The momentum of the body is the product of the mass and the velocity of the object. Let us noter that momentum is na vector quantity but the direction of the vector would just be the direction of the velocity of the object.

We can tell from the question that we have above that the parameters are;

Mass of the object = 60 Kg

Velocity of the object = 27 m/s

Now in this case we would have that;

Momentum of the body = 60 Kg * 27 m/s

= 1620 Kg m/s

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Answer:

D. the frequency of gamma rays is greater.

Explanation:

Gamma rays occupy the short-wavelength end of the spectrum; they can have wavelengths smaller than the nucleus of an atom. Visible light wavesare one-thousandths the width of human hair--about a million times longer than gamma rays. Radio waves, at the long-wavelength end of the spectrum, can be many meters long.

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As the physical spacing of the distance between water molecules changes, the density of the water may change too.

A substance's density is determined by how much mass it has per unit of volume. In other words, it is a measure of how much matter is contained in a certain amount of space. The density of a substance can be influenced by various factors, including temperature and pressure. In the case of water, changes in temperature can lead to changes in the physical spacing between water molecules. When water is heated, the individual water molecules begin to move more quickly, which increases the average distance between them. This increase in the space between the water molecules leads to a decrease in the overall density of the water. As a result, hot water is less dense than cold water. Conversely, when water is cooled, the individual water molecules slow down, which decreases the average distance between them. This decrease in the space between the water molecules leads to an increase in the overall density of the water. As a result, cold water is more dense than hot water. In summary, as the physical spacing of the distance between water molecules changes, the density of the water may change too. This relationship between temperature and density is one of the unique properties of water that is critical to many biological and ecological processes.

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The minimum energy photon required to give rise to an electron-positron pair depends on the mass of the electron-positron pair, which is 1.02 MeV/c^2.

Therefore, the minimum energy of the photon required is 1.02 MeV.
Under the right circumstances, a photon with the minimum energy required to create an electron-positron pair must have energy equivalent to the combined mass of an electron and positron. The energy can be calculated using Einstein's famous equation, E=mc^2.
For an electron, the mass (m) is approximately 9.11 x 10^-31 kg, and the speed of light (c) is approximately 3.0 x 10^8 m/s. Since an electron and positron have equal masses, the combined mass is 2m.
The minimum energy (E) required is:

E = (2m)c^2
E = (2 * 9.11 x 10^-31 kg) * (3.0 x 10^8 m/s)^2
E ≈ 1.64 x 10^-13 Joules

Therefore, the minimum energy photon required to create an electron-positron pair is approximately 1.64 x 10^-13 Joules.

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Answer:

.

Explanation:

Sound waves are caused by vibration ripples in water are caused by disturbance in the molecules

Sound waves are longitudinal (the particles move in the same direction as the wave) as opposed to transversal waves (for example, in a sea wave, the water particles move up and down to form the wave). ... Water being incompressible is one of the reasons why sound waves move much faster in water than ripples.

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The time of motion of the bullet is 0.064s.

The horizontal speed of the bullet is 781.25 m/s.

The time of motion of the bullet is the time taken for the bullet traveled from its initial position to the final position and it is calculated as follows;

h = vt + ¹/₂gt²

where;

0.02 = 0 + ¹/₂(9.8)t²

0.02 = 4.9t²

t² = 0.02/4.9

t² = 0.0041

t = √0.0041

t = 0.064 s

The horizontal speed of the bullet is calculated using the following formula shown below;

X = Vₓt

where;

Vₓ = X/t

Vₓ = (50 m) / (0.064)

Vₓ = 781.25 m/s

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Answer:

20kgm/s

Explanation:

p=mv

p=5*4

p=20kgm/s

Answer:

Sh = Vh t         horizontal distance traveled

Sh = 10.2 m/s * 3.7 s = 37.74 m

Answer:

The answer is C

Explanation:

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