A rugby player runs with the ball directly toward his opponent's goal, along the positive direction of an x axis. He can legally pass the ball to a teammate as long as the ball's velocity relative to the field does not have a positive x component. Suppose the player runs at speed 5.9 m/s relative to the field while he passes the ball with velocity vector v BP relative to himself. If vector v BP has magnitude 7 m/s, what is the smallest angle it can have for the pass to be legal?1° (relative to +x axis)

Answer:

The cumulative distance that the bird travel is 13.33 Km

Explanation:

Given that,

Velocity of runner = 3.4 km/hr

Distance = 8 km

Velocity of bird = 17 km/hr

Let x is the distance from the origin where the runner run into the bird

We need to calculate the value of x

Using time of runner and bird

\(t_{r}=t_{b}\)

\(\dfrac{d_{r}}{v_{r}}=\dfrac{d_{b}}{v_{b}}\)

Put the value into the formula

\(\dfrac{x}{3.4}=\dfrac{8+(8-x)}{17}\)

\(17x=3.4\times8+3.4(8-x)\)

\(17x=27.2+27.2-3.4x\)

\(17x+3.4x=54.4\)

\(x=\dfrac{54.4}{20.4}\)

\(x=2.67\)

We need to calculate the cumulative distance that the bird travel

Using distance of bird

\(d_{b}=16-x\)

Put the value into the formula

\(d_{b}=16-2.67\)

\(d_{b}=13.33\ km\)

Hence, The cumulative distance that the bird travel is 13.33 Km

The speed is given as 12.34 m/s. It contains 4 number of significant figures or sig figs.

The speed sensor measures the speed as 12.34 m/s.

The initial uncertain or estimated digit and all the digits known with certainty are referred to as the important figures of a measured amount. The first unknown digit is the last digit recorded in a measurement since it makes no sense to report any additional digits after it. When necessary, zeros are utilised to position the important figures correctly.

From the rules for deciding which digits in a measurement are significant, it is said that all non-zero digits in a measurement are significant.

12.34 m/s - contains all non-zero digits

Thus, it contains 4 sig figs.

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Answer:

Dog

Explanation:

The Sirius or Dogstar is the brightest star in Earth's night sky.

Answer:

Explanation:

F=ma

a=change in velocity/time

f=m*change in velocity/time

velocity= Force*time/mass

The minimum rate at which the car must accelerate in order for a dime placed on the back wall to stay in place is 25.59 m/s².

An object moving along the path is hampered by a force called static friction. This friction takes place when two fabrics move past one another. All around us, there is conflict. For instance, when we walk, the floor is in contact with our feet.

Using the following calculation for the static friction force:

\(f_{s}\) = \(\mu_{s}\)N

Likewise, N = mg

Due to the vehicle's minimal acceleration

N = m\(a_{min}\)

\(f_{s}\) = \(\mu_{s}\)m\(a_{min}\)

\(a_{min}\) = mg/\(\mu_{s}\)m

\(a_{min}\) = g/\(\mu_{s}\)

\(a_{min}\) = 9.8/ 0.285

\(a_{min}\) = 34.38m/s².

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Answer:

Gravity    (perhaps)

Explanation:

Without a further description or a diagram, I would guess the downward force would be gravity.

Gravity exerts a downward pull on the book with a magnitude of 5 n. the correct answer would be option (A) gravity.

The attraction that the earth, moon, or other immensely big object has on another object is referred to as gravity. By definition, this is the object's weight. Gravity affects all items on Earth and is directed "downward" towards the earth's center. On Earth, gravity gives physical objects weight, while the Moon's gravity causes sublunar tides in the seas (the corresponding antipodal tide is caused by the inertia of the Earth and Moon orbiting one another).

Gravity also plays a significant role in biology, such as regulating plant development through gravitropism and controlling fluid circulation in multicellular animals.

According to research into the consequences of weightlessness, gravity may have a role in immune system function and cell differentiation inside the human body.

Thus, Gravity exerts a downward pull on the book with a magnitude of 5 n.

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The complete question would be as:

A downward force of magnitude 5 n is exerted on the book by the force of downward force of magnitude 5 n is exerted on the book by the force of the table.

A. gravity

B. inertia

C. momentum

D. acceleration

Answer:

453.25 MJ

Explanation:

The formula to find kinetic energy is :

\(E_{k} = \frac{1}{2} X m X v^{2}\)

E.k = ?

m = 0.56kg

v = 25mi./s which needs to be converted into metres per second

1mi./s= 1609.34m/s

25 mi./s = 40233.6 m/s.

E.k. = 0.5 × 0.56 × 40233.6²

e.k = 453247919.3J

E.k.= 453.25 MJ

The temperature of the plasma will increase as current is passed through it.

Current can be defined as a flow of charged particles through a medium and the particles includes: electrons or ions.

Temperature is the degree of hotness or coldness experienced by a material.

The more current passes through the plasma the more energy is induced making the particles to move faster which in turns causes temperature to increase and reducing the resistance of the plasma.

In conclusion, The current causes temperature to increase and this reduces the resistance.

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Answer:

Explanation:

In physics, work can be described as force multiplied by the displacement of the object (distance caused by the force acted on the object).

Work is a form of energy, therefore, it is measured in joules.

If Alex pushed on an object with 10N of force, and the object moved 2 meters, the work of Alex will be equal to:

W = Ft

W = 10N * 2m

W = 20 Joules

But, if we have John, that pushed on an object with 2N of force, but, since the object was way smaller, therefore it had way less inertia, the object moved a distance equal to 10 meters. Let's also calculate his work.

W = Ft

W = 2N * 10m

W = 20 Joules

And we got the same result.

Work can also be used to calculate power.

Power is equal to P = Work / time

It can also be written as P = delta Work / delta time

Power is measured in joules per second.

With power you can make the difference between someone that got a 2 kg object up in 2 second, and someone that got a 2 kg object up in 5 second.

The more powerful one would be the one who managed to make the same work in less time.

Hope it Helped!

Work is described as: the measure of energy transfer resulting from the application of force over a displacement.

In the field of physics, work is most accurately defined as the outcome of multiplying the force exerted on an object by the distance the object is displaced in the same direction as the force.

This calculation serves to quantify the energy transferred to or from the object. For instance, if an individual applies a 50 Newton force to push a box across a 5-meter distance in the force's direction, the work done on the box would equal 250 Joules (50 N × 5 m).

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Answer:

Potential energy is energy that is stored in an object or system. It remains unaffected by the environment outside of the object or system. Kinetic energy is the energy of an object or a system's particles in motion.

Explanation:

Answer:

La magnitud de la masa del peso es 78.447 libras-masa.

Explanation:

La tensión es una fuerza de reacción de la cuerda causada por la acción de una fuerza externa. En este caso, esa fuerza externa es el peso que cuelga en el centro de la cuerda. Abajo hemos adjuntado una representación simplificada del enunciado.

Por las leyes de Newton, tenemos la siguiente ecuación de equilibrio conformada por tres fuerzas:

\(\vec T_{1} + \vec T_{2} + \vec W = (0, 0)\, [N]\) (1)

Donde:

\(\vec T_{1}\), \(\vec T_{2}\) - Tensiones a cada lado de la cuerda, en newtons.

\(\vec W\)- Peso, en newtons.

Si sabemos que \(\vec T_{1} = T\cdot (\cos \alpha, \sin \alpha)\), \(\vec T_{2} = T\cdot (-\cos \alpha, \sin \alpha)\) y \(\vec W = W\cdot (0, -1)\), entonces tenemos la siguiente ecuación vectorial:

\(T\cdot (\cos \alpha, \sin \alpha) + T\cdot (-\cos\alpha, \sin \alpha) + W\cdot (0, -1) = (0,0)\)

\(T\cdot (0, 2\cdot \sin \alpha) = W\cdot (0, 1)\)

Esto permite reducir la anterior expresión a una fórmula escalar:

\(2\cdot T\cdot \sin \alpha = W\)

Donde \(\alpha\) es el ángulo de inclinación de la cuerda, medido en grados sexagesimales.

El ángulo de inclinación de la cuerda se determina mediante la siguiente fórmula trigonométrica inversa es:

\(\alpha = \tan^{-1} \left(\frac{2\,ft}{10\,ft}\right)\)

\(\alpha \approx 11.310^{\circ}\)

Si conocemos que \(\alpha \approx 11.310^{\circ}\) y \(T = 200\,lbf\), entonces la magnitud del peso es:

\(W = 2\cdot (200\,lb)\cdot \sin 11.310^{\circ}\)

\(W \approx 78.447\,lbf\)

En el Sistema Imperial, las fuerzas son medidas en forma gravitacional, entonces la magnitud de la fuerza gravitacional del peso equivale a la magnitud de su masa. En síntesis, la magnitud de la masa es \(78.447\,lbm\).

La magnitud de la masa del peso es 78.447 libras-masa.

When you change the thickness of the wire in a circuit, option B. the resistance (R) and current (I) will also change, but the voltage (V) will remain constant.

The resistance of a wire is directly proportional to its length and inversely proportional to its cross-sectional area (thickness). As the thickness of the wire changes, the cross-sectional area changes, which in turn affects the resistance. Thicker wires have a larger cross-sectional area, resulting in lower resistance, while thinner wires have a smaller cross-sectional area, resulting in higher resistance. Therefore, changing the thickness of the wire will cause a change in resistance.

According to Ohm's Law (V = IR), the voltage (V) in a circuit is equal to the product of the current (I) and the resistance (R). If the voltage is kept constant, and the resistance changes due to the thickness of the wire, the current will also change to maintain the relationship defined by Ohm's Law. When the resistance increases, the current decreases, and vice versa.

However, it's important to note that changing the thickness of the wire will not directly affect the voltage. The voltage in a circuit is determined by the power source or the potential difference applied across the circuit and is independent of the wire thickness. As long as the voltage source remains constant, the voltage across the circuit will remain constant regardless of the wire thickness. Therefore, the correct answer is option B.

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Answer:d

Explanation:

Physical property do these two elements most likely have in common They both D.conduct electricity very well

Iron is a metal specifically known as a transition metal. It fits the description of metals, as it is silvery gray, ductile, and malleable.

silicon is known as a chemical analogue to carbon. But unlike carbon, silicon a metalloid

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If A rope is vibrating at a high frequency. The length of the rope is 2.40 meters. the wavelength of the wave is 1.60 meters.

Wavelength is the distance between two consecutive points of a wave that are in phase, such as two adjacent crests or troughs. It represents the spatial extent of one complete cycle of the wave.

In this case, since we have one full wave and one-half wave, the total distance covered by the wave is equivalent to one and a half wavelength.

The length of the rope is given as 2.40 meters, which corresponds to one and a half wavelengths. To find the wavelength of the wave, we can divide the total length by the number of wavelengths:

Wavelength = Total length / Number of wavelengths

In this case, the total length is 2.40 meters, and the number of wavelengths is one and a half (1.5):

Wavelength = 2.40 meters / 1.5 = 1.60 meters

Therefore, the wavelength of the wave is 1.60 meters.

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Pressure equals force divided by area.

P=F/A

The equation above shows that pressure is directly proportional to force, but inversely proportional to area. At a constant area, pressure increases as the magnitude of the force applied also increases.

for example;

A heavy sofa exerts more pressure on the floor compared to an empty box in the same area.

Pressure increases as the area decreases.

A finger exerts more pressure by pressing on the skin compared to the pressure exerted by a needle attached to a syringe. A finger may cause slight depression on the skin when pressed, but may not inflict pain at all.

however, when the same force is applied to a needle, the pressure produced is large enough to hurt the skin.

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Answer: The greater the area, the smaller the pressure applied and the smaller the area, the greater the pressure applied

Explanation: As one applies a certain force to a body of a large area, the pressure applied will be little and a force applied to a body of a small area, the pressure applied will be greater for pressure will tend to be greater if applied to a body of small area and therefore the force applied will create a strong pressure

Answer:

Rusting!

Explanation:

Rusting is a chemical reaction because it is the process of oxidation of a metal.  

Answer:

rusting

Explanation:

In my opinion, mental health can affect all of these options. However, I think the answer this is looking for would be "A person's ability to breathe"

Mental health definitely affects motivation; and motivation affects mental health. Motivation is a driving force behind human behaviours; its absence can lead to mental illnesses such as depression. Often when someone is depressed, they lack the motivation to do things.

Mental health can affect decision making as well- for example, if someone has anxiety, decision-making can be harder. Anxiety disrupts the decision-making regions in the prefrontal cortex.

Mental health can also affect memory- Depression has been linked to memory problems, such as forgetfulness. Depression is associated with short-term memory loss. Stress and anxiety can also lead to poor memory.

I would say that panic attacks can inhibit a person from breathing, but considering the options I would say that's the best one. Breathing is more of a physical thing, not associated with the brain or mental condition. So the answer is A person's ability to breathe.

Answer:

Explanation:

mass (m) = 50 kg

Force (F) = 200 N

Acceleration (a)= ?

WE know

F = m * a

200 = 50 * a

a = 200 / 50

a = 4 m/s²

Hope it will help :)

Answer:

382.74 kJ.

Explanation:

The work that must be done to stop an 1100 kg car travelling at 59  km/h is  - 382.74 kJ.

The work needed to stop an 1100 kilograms car moving with a velocity of  59.0 km/hr would be  147.72 kilojoules.

The total amount of energy transferred when a force is applied to move an object through some distance

The work done is the multiplication of applied force with displacement.

Work Done = Force * Displacement

As given in the problem we have to find out how much work is needed to stop a 1,110-kilogram car that is moving straight down the highway at 59.0 kilometers/hour

the mass of the car = 1100 kilograms

the velocity of the car = 59 kilometers/hour

KE = 0.5mv²

     =0.5×1100×(59×1000/3600)²

     = 147.72 kilojoules

Thus, the work needed to stop an 1100 kilograms car would be  147.72 kilojoules

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To solve this problem, we can use the equation for braking distance:
Braking distance = (initial velocity)^2 / (2 x braking force)

We want to bring the car to a halt, so the final velocity will be 0 m/s. Therefore, the braking distance will be equal to the initial distance the car traveled in 10 seconds:

Braking distance = 20 m/s x 10 s = 200 m

Now we can plug in the values we have:

200 m = (20 m/s)^2 / (2 x braking force)

Solving for the braking force, we get:

braking force = (20 m/s)^2 / (2 x 200 m) = 1000 N

Therefore, a braking force of 1000 N is needed to bring the car to a halt in 10 seconds.

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A low-voltage thermostat in an electric furnace is used to control the temperature.

The low-voltage thermostat plays a crucial role in regulating the temperature within an electric furnace. When connected to the furnace's heating system, the thermostat acts as a control device, allowing users to set their desired temperature.

Here's how it works:

Sensing the temperature: The low-voltage thermostat contains a sensor that measures the ambient temperature of the room or space where the furnace is located. This sensor detects any fluctuations in temperature, whether it's too hot or too cold.

Signaling the furnace: Once the desired temperature is set by the user, the thermostat compares it to the current room temperature. If the current temperature deviates from the set temperature, the thermostat sends a signal to the furnace.

Adjusting the heating: Upon receiving the signal, the furnace responds accordingly. If the room temperature is lower than the desired temperature, the furnace activates its heating elements, generating warmth. Conversely, if the room temperature exceeds the desired temperature, the furnace shuts off or reduces its heating output.

In summary, the low-voltage thermostat in an electric furnace acts as a mediator between the user and the heating system. It senses the temperature, signals the furnace when necessary, and adjusts the heating output to maintain a comfortable and consistent temperature in the space. By doing so, it helps ensure energy efficiency and provides a comfortable environment for occupants.

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Answer:

Im pretty rusty with this stuff, personally I'd say B, but wait for someone else to answer this or reply to my answer. I don't remember a lot of this type of stuff so... Hope this helps :)

Explanation:

The relationship between kinetic energy and pressure energy is derived from the Bernoulli equation, which describes the conservation of energy in fluid flow.

The Bernoulli equation states that the total energy of a fluid flowing through a streamline is constant along that streamline, neglecting any external forces such as friction or heat transfer.

The Bernoulli equation can be written as:

P + 1/2 * ρ * \(v^2\) + ρ * g * h = constant

where P is the pressure of the fluid, ρ is the density of the fluid, v is the velocity of the fluid, g is the acceleration due to gravity, and h is the height above a reference level.

The equation shows that the total energy per unit volume of the fluid consists of three terms: the pressure energy (P), the kinetic energy (1/2 * ρ * \(v^2\)), and the potential energy due to elevation (ρ * g * h).

As fluid flows, it experiences changes in velocity and pressure. According to the Bernoulli equation, if the velocity of the fluid increases, the pressure decreases and vice versa. This relationship is often referred to as the Bernoulli principle.

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Answer: Dark matter.

Explanation: Hope it helps :)

Answer:

4000N left

Explanation:

6000N-1000N-1000N

6000N-2000N

8000N

Answer:

9.8 meters/second^2

Explanation:

formula: Fg=mg

Answer:

15 kg

Explanation:

Since, weight=147 N

we know,

Weight=mass × acc.due to gravity (g)

or,mass=weight/g

or,mass=147/9.8

:.mass=15 kg

When traveling twice as fast your kinetic energy is increased by four times.

Kinetic energy is the energy that can be seen as the motion of an item or a subatomic particle. It is also known as the energy of motion. Kinetic energy is a property that is shared by all moving objects and particles. To calculate the kinetic energy, we can use this following formula:

KE = ½ m × v²

Where:

M = mass of the body

V = velocity of the body

In this case, we are given that:

KE = ½ m × (2 × v)²

KE = 4 (½ × m × v²)

KE = 4 times initial KE

Therefore, the kinetic energy increases four times as the speed doubles.

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