a baseball is thrown at a 70∘ 70∘ angle with the horizontal with an initial speed of 30 mph. find the component form of the initial velocity.

Answer:

8

Explanation:

V = voltage

I = current

R = resistance

V = IR is the equation to find out the Voltage of an item so if we move around the equation so we are trying to resistance it would become R = V/I. So....

V = IR

R = V/I

R = 24/3

R = 8

The maximum kinetic energy of the electrons when barium is illuminated by light with a wavelength of 400 nm is approximately 0.622 × 10^(-15) eV.

To calculate the maximum kinetic energy of electrons when barium is illuminated by light of a certain wavelength, we can use the photoelectric effect equation:

E = hf - Φ

Where:

E is the maximum kinetic energy of electrons,

h is Planck's constant (approximately 4.136 × 10^(-15) eV·s),

f is the frequency of the light (related to wavelength by the equation f = c/λ, where c is the speed of light),

Φ is the work function of the metal (given as 2.48 eV).

To solve the problem, we first need to convert the given wavelength of 400 nm to frequency:

λ = 400 nm = 400 × 10^(-9) m

c = speed of light = 3 × 10^8 m/s

f = c/λ = (3 × 10^8 m/s) / (400 × 10^(-9) m) = 7.5 × 10^14 Hz

Now, we can substitute the values into the photoelectric effect equation:

E = hf - Φ

E = (4.136 × 10^(-15) eV·s) × (7.5 × 10^14 Hz) - 2.48 eV

Calculating this equation gives us:

E ≈ (3.102 × 10^(-15) eV) - 2.48 eV

Simplifying further:

E ≈ 0.622 × 10^(-15) eV

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Answer:

Seismic waves

Think of earthquakes :)

Answer:

Newtons 3rd law

Explanation:

Answer:

current must flow and chemical energy must take place

Answer:

lol b b b b b and b

Explanation:

duuuh its b

The option that would NOT suggest an interaction effect is the "Two parallel lines." interaction effect. The correct answer is option(a).

When one independent variable's effect on the dependent variable varies according to the value of another independent variable, this is known as the interaction effect. In other words, the level of the other independent variable determines the impact of one independent variable on the dependent variable. For example, in a study on the effect of a new medication on blood pressure, the interaction effect would occur if the impact of the medication varies depending on the age of the patients.

Age would be the moderating variable in this example. According to the given options, two parallel lines would represent that the two independent variables being analyzed have no effect on the dependent variable, meaning that there is no interaction effect present. Therefore, option A would NOT suggest an interaction effect. The remaining options suggest an interaction effect as they indicate that there is an impact on the dependent variable based on the level of the independent variables.

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Doubling the kinetic energy of a car does not change its momentum. Momentum is determined solely by the mass and velocity of the object, independent of its kinetic energy.

Kinetic energy and momentum are two different physical quantities that describe the motion of an object. Kinetic energy depends on the mass and velocity of an object, while momentum depends only on the mass and velocity.

When the kinetic energy of a car is doubled, it means that the car's velocity is increased while its mass remains the same. However, momentum is the product of mass and velocity, so if the mass remains constant, any change in kinetic energy does not directly affect momentum.

Mathematically, the formula for kinetic energy is KE = (1/2)mv^2, where KE represents kinetic energy, m represents mass, and v represents velocity. On the other hand, momentum is given by the formula p = mv, where p represents momentum. As we can see, kinetic energy involves velocity squared, while momentum only involves velocity.

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It should be noted that to calculate the acceleration between points B and E, we need to have information about the initial and final velocities, as well as the time it takes to go from point B to point E.

Assuming we have this information, we can use the following formula to calculate the acceleration:

acceleration = (final velocity - initial velocity) / time

Here's a step-by-step process to calculate the acceleration between points B and E:

Determine the initial velocity at point B. This could be given to you or you may need to calculate it based on other information.

Determine the final velocity at point E. Again, this could be given to you or you may need to calculate it based on other information.

Determine the time it takes to go from point B to point E. This could be given to you or you may need to calculate it based on other information.

Plug the values from steps 1, 2, and 3 into the acceleration formula:

acceleration = (final velocity - initial velocity) / time

Calculate the acceleration using the formula and express the answer in the appropriate units (such as meters per second squared or feet per second squared).

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Given:

Speed of the toy car max speed = 15 m/s

Time taken before the battery dies = 30 minutes.

Let's find how far the car went.

To find the distance the car travelled, aply the formula:

Where:

Speed = 15 m/s

time = 30 min

Convert the speed to meters per hour

Convert the time to hour.

Where:

1 hour = 60 mins = 3600 seconds

Thus, we have:

• Speed in m/h:

• Time in hour:

To find the distance, we have:

Therefore, the toy car travelled 27000 meters.

ANSWER:

27000 meters.

The point at which the Fahrenheit and Celsius scales have the same numerical value is -40°C. The point at which the Fahrenheit and Kelvin scales have the same numerical value is 459.67°F the expansion gap that should be left between the steel railroad rails is 0.0045 m or 4.5 mm.

(a) The point at which the Fahrenheit and Celsius scales have the same numerical value is -40°C. This is because this temperature is equivalent to -40°F.  At this temperature, both scales intersect and meet the same numerical value.
(b) The point at which the Fahrenheit and Kelvin scales have the same numerical value is 459.67°F. At this temperature, both scales intersect and meet the same numerical value.
For the second part of the question:
Given that the original length of the steel railroad rails is 12.5m, the maximum temperature rise is 30℃, and the coefficient of linear expansion (a) is 1.2×10⁻⁵/℃.
Therefore, the expansion ΔL can be calculated as:
ΔL = L×a×ΔT
Where L is the original length of the steel railroad rails, a is the coefficient of linear expansion, and ΔT is the temperature rise.
Substituting the given values, we have:
ΔL = 12.5×1.2×10⁻⁵×30
ΔL = 0.0045 m
Therefore, the expansion gap that should be left between the steel railroad rails is 0.0045 m or 4.5 mm. This gap allows the rails to expand without buckling or bending.

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Some metals when the kinetic energy of their particles is decreased.

Hence, the correct option is D.

When the kinetic energy of the particles in a metal is decreased, it means that the particles are moving slower and have less energy. This can have a number of effects on the metal, depending on the specific properties of the metal.

A) Melting occurs when a solid substance is heated to a temperature where it becomes a liquid. A decrease in kinetic energy of particles is unlikely to cause melting of a metal.

B) Metals are good conductors of electricity due to the mobility of their electrons. A decrease in kinetic energy may not affect the metal's ability to conduct electricity, unless it affects the number of free electrons in the metal.

C) Most metals expand when they are heated and contract when they are cooled. However, a decrease in kinetic energy of particles in a metal may not cause it to expand.

D) Most metals contract when they are cooled.

Therefore, a decrease in kinetic energy of particles in a metal could lead to contraction of the metal.

Hence, the correct option is D.

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The theory that suggests we cannot share our thoughts without the use of a common language is known as the ""Sapir-Whorf hypothesis"" or ""linguistic relativity."" Proposed by linguists Edward Sapir and Benjamin Lee Whorf, this hypothesis argues that the structure and vocabulary of a language shape the way individuals perceive and think about the world.

The Sapir-Whorf hypothesis posits that the language we speak not only serves as a tool for communication but also plays a fundamental role in shaping our thoughts, perceptions, and worldview. According to this theory, different languages encode and categorize experiences in distinct ways, leading to variations in how speakers of different languages perceive and interpret the world around them.

The hypothesis can be divided into two main ideas: linguistic determinism and linguistic relativity. Linguistic determinism suggests that the language we speak determines the way we think and limits our cognitive abilities. In other words, the structure and vocabulary of a language impose constraints on our thoughts, making certain concepts easier or more difficult to express and comprehend. For example, if a language lacks a specific word to describe a particular emotion, it may be more challenging for speakers of that language to fully understand and convey that emotion.

On the other hand, linguistic relativity argues that language influences our thoughts and perception without completely determining them. It suggests that different languages emphasize and prioritize different aspects of the world, leading to differences in how speakers of various languages conceptualize and interpret reality. For instance, some languages may have more words to describe colors, leading speakers of those languages to be more attentive to and capable of distinguishing between different shades of color compared to speakers of languages with fewer color terms.

The Sapir-Whorf hypothesis has been studied and debated extensively by linguists, psychologists, and anthropologists. While there is evidence supporting the idea that language can influence thought, the extent and universality of this influence are still subjects of ongoing research. Some researchers argue that language plays a significant role in shaping cognition, while others maintain that it is one of several factors that contribute to our thought processes.

It is important to note that the Sapir-Whorf hypothesis does not imply that language is the sole determinant of thought. Human cognition is a complex interplay of various factors, including culture, socialization, personal experiences, and innate cognitive abilities. Moreover, individuals have the capacity for abstract thinking and can go beyond the limitations of their language to some extent.

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The conceptual definitions for terms describing waves are:

1. Wavelength: The distance between two consecutive points in a wave that are in the same phase, usually measured from crest to crest or trough to trough.

2. Period: The time it takes for one complete cycle of a wave to pass a given point, usually measured in seconds.

3. Velocity: The speed at which a wave propagates through a medium, typically measured in meters per second (m/s).

4. Amplitude: The maximum displacement of a point in a wave from its equilibrium position, often representing the energy or intensity of the wave.

5. Frequency: The number of complete wave cycles that occur in one second, typically measured in hertz (Hz).

6. Intensity: The amount of energy carried by a wave per unit time and area, often related to the amplitude and frequency of the wave.

7. Phase: The position of a point in a wave relative to the wave's cycle, usually measured in degrees or radians and used to describe the timing relationship between different parts of a wave or between multiple waves.

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The third quartile is 183.72 minutes. So, the answer is 183.72 minutes.

Given: The typical college freshman spends an average of =150 minutes per day, with a standard deviation of =50 minutes, on social media and the third quartile is 0.75.

Therefore, we can determine the answer as follows:

We know that the third quartile, denoted by Q3, is the value such that 75% of the data lies below it. So, z-score corresponding to the third quartile is given by:

z = invNorm(0.75)

Where, invNorm is the inverse Normal distribution function.

By definition, the inverse Normal distribution gives the z-score given the area under the Normal distribution curve. Here, we need to find the area corresponding to the upper tail of 0.25 (since 75% of the data lies below the third quartile). This can be calculated as follows:

Area to the left of Q3 = 1 - Area to the right of Q3= 1 - 0.25 = 0.75

Therefore, the z-score corresponding to this area is given by:

z = invNorm(0.75) = 0.6745

Now, the value of the third quartile can be obtained by using the z-score formula as follows:

z = (X - μ) / σ

where, X = value of the third quartile, μ = population mean = 150 (given), σ = population standard deviation = 50 (given)

Substituting the values, we get:

0.6745 = (X - 150) / 50

Solving for X, we get: X = 150 + 0.6745 * 50X = 183.72

Therefore, the third quartile is 183.72 minutes. So, the answer is 183.72 minutes.

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Answer:

Explanation: the table shows during an experiment

Gravitational forces are strongest between objects with identical masses,  claims are supported by the data. Option B is correct.

Newton's law of gravity states that each particle having mass in the universe attracts each other particle with a force known as the gravitational force.

Gravitational force is proportional to the product of the masses of the two bodies and inversely proportional to the square of their distance.

When mass increases and distance reduces, gravity rises. Gravity also lowers when the distance between two points grows and the mass decreases.

From the table, it is observed that gravitational forces are strongest between objects with identical masses,  claims are supported by the data.

Hence, option B is correct.

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Answer:

it's 100m/s2

Explanation:

a=f/m

or,a=5/50/1000. (mass si unit is kg and 1kg=1000g

or,a=5/0.005

or,a=100m/s2

Answer:

simltinoues divide two eqn El÷E2 Kq\ r^2\kq \2r^2 then you get it 7.5 N\c the answer is A

Answer:

A

Explanation:

After treating with an antibiotic for several generations, bacteria will develop antibiotic resistance.

Antibiotic resistance occurs when bacteria, fungi, and other microorganisms learn to resist the medications meant to kill them. That implies that the germs survive and develop. Treatment for resistant infections can be challenging and perhaps impossible.

Bacteria can evolve antibiotic resistance through mutation and selection. For instance, although some bacteria have evolved to create enzymes to inactivate the antibiotic, others have built biochemical "pumps" that can remove an antibiotic before it reaches its target.

Antibiotic usage is the primary contributor to antibiotic resistance. While some bacteria die when humans take antibiotics, resistant bacteria can live and even proliferate. Antibiotic usage increases the prevalence of microorganisms with resistance. The more we use antibiotics, the more antibiotic resistance will develop in bacterias.

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Answer:

wind turbines,photovoltaic cells,concentrated solar power, ocean wave power

For a mass m1 on the frictionless table, the speed m1 must rotate a with radius r if m2 is to remain hanging at rest is mathematically given as

\(v=\sqrt{m1/m2*xg}\)

Generally, the equation for the Force  is mathematically given as

Fc=Fw

Therefore

\(\frac{m1v1}{x}=m2g\)

\(v=\sqrt{m1/m2*xg}\)

In conclusion,  if m2 is to remain hanging at rest the speed of ratio of m1 is calcuylated using

\(v=\sqrt{m1/m2*xg}\)

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The value of the velocity for the mass m₁ on the frictionless table will be \(\rm v = \sqrt{\frac{m_1}{m_2 xg} }\). Velocity is a time-based component. Its unit is m/sec.

The change of distance with respect to time is defined as speed. Speed is a scalar quantity.

The given data in the problem is

m is the mass

g is the acceleration of free fall =10m/sec²

v is the velocity

From the balancing equation of force the centripetal force is equal to the weight;

\(\rm F_c= m_2 g \\\\ \rm \frac{m_1v_1^2}{x} = m_2 g \\\\ v= \sqrt{\frac{m_1}{m_2xg} } \\\\\)

Hence the value of the velocity for the mass m₁ on the frictionless table will be \(\rm v = \sqrt{\frac{m_1}{m_2 xg} }\).

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There will be 16,000 N of force between the two charges. It is the force that a charge puts on another charge.

The electric force between two charges is inversely proportional to the square of the distance that separates them and directly proportional to the product of the charges.

The given data in the problem is;

q₁ is the magnitude of charge 1= - 2.0x10⁻⁴ C

q₂ is the magnitude of charge 2 = + 8.0x10⁻⁴ C

k is the proportionality constant = 9 x 10⁹ Nm² / C²

r is the separated distance = 0.30 m

F is the electric force=?

The electric force is found as;

\(\mathrm{F}=\frac{\mathrm{Kq}_1 4 \mathrm{q}_2}{\mathrm{r}^2}\)

\(\mathrm{F}=\frac{9 \times 10^9 \times 2.0 \times 10^{-4}}{(0.30)^2}\)

F = 16,000 N

There will be 16,000 N of force between the two charges.

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Answer:

Correct Choice: c)

Explanation:

When an object is launched with an angle with respect to the horizontal, it describes a curved path exclusively under the action of gravity.

The velocity at any point of the path has two components:

The horizontal component has a constant value because no acceleration acts in that direction.

The vertical component has a variable value that depends on the acceleration of gravity and the time.

When the golfer drives the golf ball in a high arcing shot it reaches a maximum height and then returns to the ground.

a) The velocity is never zero until the ball hits the ground. The acceleration is never zero. False

b) The x-velocity is constant and equal to the horizontal component of the initial velocity. The y-velocity is zero at the highest point. Only one condition is true, thus the whole statement is False.

c) The x-velocity is never zero, and the y-velocity is zero as explained above. True

d) The velocity is non-zero, and the acceleration is not zero. False

Its velocity as well as acceleration are both non-zero.

As a result, the aforementioned response is correct.

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The total delay is approximately 0.635021 seconds. The transmission delay is the dominant component of the total delay. The propagation delay, queuing delay, and processing delay are relatively small compared to the transmission delay and can be considered negligible.

To calculate the total delay for a frame of size 5 Mbits being sent on a link with 6 routers, we need to consider the various components of delay: propagation delay, transmission delay, queuing delay, and processing delay.

Propagation Delay:

Propagation delay is the time taken for a bit to travel from one end of the link to the other. It is determined by the distance and the speed of light inside the link. The propagation delay can be calculated using the formula:

Propagation Delay = Distance / Speed of Light

In this case, the length of the link is given as 3000 Km, which is equivalent to 3,000,000 meters. The speed of light inside the link is 3 x 10^8 m/s. Therefore, the propagation delay is:

Propagation Delay = 3,000,000 m / (3 x 10^8 m/s) = 10 ms

Transmission Delay:

Transmission delay is the time taken to transmit the entire frame on the link and is calculated using the formula:

Transmission Delay = Frame Size / Bandwidth

The frame size is given as 5 Mbits (5 x 10^6 bits) and the bandwidth is given as 8 Mbps (8 x 10^6 bits per second). Therefore, the transmission delay is:

Transmission Delay = (5 x 10^6 bits) / (8 x 10^6 bits per second) = 0.625 seconds

Queuing Delay:

Queuing delay occurs when the frame has to wait in the queues of the routers before being transmitted. It is given as 3 µsec (3 x 10^-6 seconds) for each of the 6 routers. Therefore, the total queuing delay is:

Total Queuing Delay = 6 routers * 3 x 10^-6 seconds = 18 µsec = 18 x 10^-6 seconds

Processing Delay:

Processing delay is the time taken by each router to process the frame before forwarding it. It is given as 0.5 µsec (0.5 x 10^-6 seconds) for each of the 6 routers. Therefore, the total processing delay is:

Total Processing Delay = 6 routers * 0.5 x 10^-6 seconds = 3 µsec = 3 x 10^-6 seconds

To calculate the total delay, we add up all the individual delays:

Total Delay = Propagation Delay + Transmission Delay + Total Queuing Delay + Total Processing Delay

= 10 ms + 0.625 seconds + 18 x 10^-6 seconds + 3 x 10^-6 seconds

To add these values, we need to ensure that they are in the same unit. Let's convert milliseconds (ms) to seconds:

10 ms = 10 x 10^-3 seconds

Now we can add the values:

10 x 10^-3 seconds + 0.625 seconds + 18 x 10^-6 seconds + 3 x 10^-6 seconds

Simplifying the expression:

0.01 seconds + 0.625 seconds + 0.000018 seconds + 0.000003 seconds

Adding the values:

0.635021 seconds

Therefore, the total delay is approximately 0.635021 seconds.

To determine which component of the total delay is dominant and which one is negligible, we compare the magnitudes of the delays:

Propagation Delay: 10 ms

Transmission Delay: 0.625 seconds

Total Queuing Delay: 18 µsec = 18 x 10^-6 seconds

Total Processing Delay: 3 µsec = 3 x 10^-6 seconds

In this case, the transmission delay is the dominant component of the total delay, as it is significantly larger than the other delays. The propagation delay, queuing delay, and processing delay are relatively small compared to the transmission delay and can be considered negligible.

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Answer:

firts divide then multiply divide again and your and your answer should d

When the ball on the left is pulled to the side and released, it will swing back and hit the ball on the right. Upon impact, the momentum of the left ball will be transferred to the right ball, causing the right ball to start swinging to the right while the left ball will come to a stop.

Therefore, the correct answer is: "The ball on the right will swing to the right." Option C

In physics, momentum is a property of moving objects that is determined by both their mass and velocity. It is defined as the product of an object's mass and velocity, and it is a vector quantity, which means it has both magnitude and direction.

Mathematically, momentum (p) is expressed as:

p = m * v

where m is the mass of the object and v is its velocity.

Momentum is conserved in a closed system, meaning that the total momentum of the system remains constant unless an external force acts on it. This is known as the law of conservation of momentum, which is a fundamental principle of physics. The law of conservation of momentum has many practical applications, from understanding the behavior of collisions in billiards or car accidents, to designing spacecraft trajectories, to studying the behavior of subatomic particles

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Answer:

Here

Explanation:

If an object has momentum, then it must also have mechanical energy. If an object does not have momentum, then it definitely does not have mechanical energy either. Object A has more momentum than object B. Therefore, object A will also have more kinetic energy.

Answer: Fg < Fq

Explanation: just took the lab test edge 2020

The electromagnetic force is greater than the gravitational force option third Fg < Fq is correct.

It is a force imposed by one charge on another as a result of the field. The electrostatic force produced by one line charge on another line charge separated by r is determined by the charge potency of each charge as well as the separation distance between them.

Force of gravity is given by:

\(\rm F_g=\dfrac{Gm_1m_2}{r^2}\)

The electrostatic force is given by:

\(\rm F_q = \dfrac{kq_1q_2}{r^2}\)

On the atomic scale, electrons, for example, have very little mass but a very large charge. As a result, electromagnetic forces rule.

Thus, the electromagnetic force is greater than the gravitational force option third Fg < Fq is correct.

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