ne of shepard and metzler's (1971) conclusions was that our speed of mentally rotating an object was about 40 degrees per second. what pattern in their data allowed them to reach this conclusion?

The time between the arrival of the p-wave and s-wave becomes greater because the s-wave travels slower than the p-wave. This is because the s-wave travels through solid material, which is denser than the material through which the p-wave travels.

As a result, the s-wave encounters more resistance and travels at a slower speed. This delay in the arrival of the s-wave compared to the p-wave is used by seismologists to calculate the distance between the earthquake epicenter and the recording station, which is an important factor in earthquake detection and monitoring.
                                  The time between the arrival of the P-wave and S-wave becomes greater due to the difference in their velocities and the increasing distance from the earthquake's epicenter. P-waves travel faster than S-waves, so they arrive first at a seismic station.

                                        As the distance from the epicenter increases, the time difference between the arrival of these waves also increases. This is because the P-wave and S-wave are covering a longer distance, and their difference in speed becomes more noticeable over a larger distance, leading to a greater time gap between their arrivals.

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The mass fraction of 235U (3.0%) in the uranium is 6.0 MeV

Mass fraction is a way of expressing the amount of a particular substance in a mixture as a fraction of the total mass of the mixture. It is calculated by dividing the mass of the particular substance by the total mass of the mixture, and expressing it as a decimal or a percentage. Mass fraction is used in many industries and processes, such as chemical engineering, pharmaceuticals, food science, and metallurgy.

The question is asking for the energy released in the fission of 1.00 kg of uranium enriched to 3.0% 235U. The nuclear reaction they are referring to is the fission of 235U, which is expressed as:[tex]$$\ce{^{235}_{92}U - > ^{140}_{56}Ba + ^{95}_{36}Kr + 3n + Q}$$[/tex]
Where Q is the amount of energy released in the reaction. The Q value for this reaction is approximately 200 MeV. Therefore, the energy released in the fission of 1.00 kg of uranium enriched to 3.0% 235U is calculated by multiplying the Q value by the mass fraction of 235U (3.0%) in the uranium:

[tex]$$Energy released = Q \times \frac{mass\;fraction\;of\;235U}{100}$$[/tex]

[tex]$$Energy\;released = (200\;MeV) \times (3.0\%) = 6.0\;MeV$$[/tex]

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The new force of attraction between the two objects would be 1.78 units.

Force is an influence that causes an object to change its velocity, shape or direction. Forces can be categorized into contact forces and non-contact forces. Contact forces are those that require physical contact between two objects, such as a person pushing a box, while non-contact forces are those that act without physical contact, such as gravity or magnetism. Forces can also be described as either balanced or unbalanced.

The force of attraction between two objects is inversely proportional to the square of the distance between them. This means that if the distance is tripled, then the force of attraction will be reduced to one ninth of its original value.Therefore, the new force of attraction between the two objects is 16/9 = 1.78 units.

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The car hits the water at an acute angle of approximately 43.1° to the horizontal.

A car is traveling along a road winding around sea-side cliffs at 54 kmph and loses control on a sharp curve, becoming air-borne. The cliff is 40 meters above the ocean below.

To find the angle at which the car hits the water, we can follow these steps:

1. Convert the car's speed from kmph to meters per second (m/s): 54 kmph * (1000 m/km) / (3600 s/h) = 15 m/s.

2. Determine the time it takes for the car to fall 40 meters vertically. Using the equation:

[tex]h = 0.5 * g * t^2[/tex]

where

h is the height,

g is the acceleration due to gravity (9.8 m/s²), and

t is the time in seconds.

We can solve for t:

 [tex]40 = 0.5 * 9.8 * t^2[/tex]
[tex]80 = 9.8 * t^2[/tex]
[tex]t^2 = 8.16[/tex]
t ≈ 2.86 s

3. Calculate the horizontal distance the car travels in the air during the 2.86 seconds:

Horizontal distance = initial horizontal speed * time

Horizontal distance = 15 m/s * 2.86 s

                                  ≈ 42.9 m

4. Calculate the angle at which the car hits the water using the inverse tangent function (arctan) of the vertical distance (40 m) divided by the horizontal distance (42.9 m):

Angle = arctan(40/42.9)

          ≈ 43.1°

So, the car hits the water at an acute angle of approximately 43.1° to the horizontal.

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The speed of the sound in carbon dioxide at normal boiling temperature of water is approximately 268.5 m/s.

The speed of sound in a gas depends on the temperature, pressure, and molecular properties of the gas. The speed of sound in carbon dioxide (CO₂) can be calculated using the following formula;

v = √(γRT/M)

where v is speed of sound, γ is adiabatic index (a property of the gas), R is universal gas constant, T is temperature in Kelvin, and M is molar mass of the gas.

At the normal boiling temperature of water (100°C or 373 K), the density of carbon dioxide is approximately 1.98 kg/m³ and the molar mass of CO₂ is 44.01 g/mol. The adiabatic index for CO₂ is 1.3.

Substituting these values into the formula, we get;

v = √(γRT/M) = √[(1.3)(8.314 J/mol·K)(373 K)/(0.04401 kg/mol)]

≈ 268.5 m/s

Therefore, the speed of sound is 268.5 m/s.

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Gravity provides the force needed for circular orbits, while velocity determines the size of the orbit. Kepler's laws relate orbit period, semi-major axis, and orbital velocity. The greater the gravitational force, the faster the object must move to maintain a stable orbit.

The relationship between gravity and velocity of orbiting objects is that gravity provides the centripetal force needed to maintain a circular orbit, and the velocity of the orbiting object determines the size of the orbit.

The greater the gravitational force between two objects, the faster an object must move to remain in a stable orbit around it. This relationship is described by Kepler's laws of planetary motion, which state that the square of the period of an orbit is proportional to the cube of the semi-major axis of the orbit.

This means that objects in larger orbits take longer to complete a full orbit than objects in smaller orbits, and the velocity required to maintain a circular orbit is proportional to the size of the orbit.

The velocity required for a stable orbit is known as the orbital velocity, and it depends on the mass of the object being orbited and the distance from it.

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The equivalent resistance of the combination of resistors is 2.31 Ω.

To calculate the equivalent resistance of resistors in parallel, we use the formula:

1/Req = 1/R1 + 1/R2 + 1/R3 + ...

In this case, we have three resistors in parallel, so the equation becomes:

1/Req = 1/4.0 + 1/8.0 + 1/16

Simplifying this equation, we get:

1/Req = 0.375

Multiplying both sides by Req, we get:

Req = 2.31 Ω

Therefore, the equivalent resistance of the combination of resistors is 2.31 Ω.

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The surface temperature of a red giant is around 3,000 Kelvin, which is much lower than the surface temperature of the sun, which is around 5,800 Kelvin.

Temperature is a physical quantity that describes how hot or cold something is. It is usually measured in degrees Celsius (°C), Fahrenheit (°F), or Kelvin (K). Temperature is an important factor in many scientific and biological processes, and can affect the rate of chemical reactions, the behavior of living organisms, and the density of air. Temperature is also used to describe the intensity of heat energy, which is measured in joules or calories.

A red giant is a luminous, cool star with a surface temperature lower than that of the sun. Typically, the surface temperature of a red giant is around 3,000 Kelvin, which is much lower than the surface temperature of the sun, which is around 5,800 Kelvin.

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The unstretched length of the spiral spring is found to be 12 cm when applied force.

Let's assume that the unstretched length of the spiral spring is L cm. When a force of 4N is hung on it, the spring extends by x cm. From Hooke's law, we know that the force exerted by a spring is directly proportional to the extension of the spring, provided the limit of proportionality is not exceeded. Therefore, we can write,

4 = kx ............ (1), spring constant is k.

Similarly, when a force of 6N is hung on it, the spring extends by (x+4) cm. Again, using Hooke's law, we can write,

6 = k(x+4) ............ (2)

Now, we can solve these two equations simultaneously to find the values of k and x. From equation (1), we have,

k = 4/x

Substituting this value of k in equation (2), we get,

6 = 4(x+4)/x

6x = 4x + 16

2x = 16

x = 8

Therefore, the extension of the spring when a force of 4N is hung on it is 8 cm. Now, we can use this value of x to find the unstretched length of the spring,

L = x + 4 = 8 + 4 = 12 cm

Therefore, the unstretched length of the spring is 12 cm.

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To calculate the equilibrium constant (K) for the Haber process at 25°C, you can use the formula K = e^(-ΔG°/RT), where ΔG° is the standard free energy change, R is the gas constant (8.314 J/mol·K), and T is the temperature in Kelvin (25°C + 273.15 = 298.15 K).

First, convert the given ΔG° value to J/mol if it's not already in that unit.

Then, plug the values into the formula and calculate K.

The equation for this reaction is: N2(g) + 3H2(g) ⇌ 2NH3(g) .

The equilibrium constant (K) for this reaction is defined as the ratio of the product concentrations to the reactant concentrations, each raised to their stoichiometric coefficients. In other words

Summary: To find the equilibrium constant for the Haber process at 25°C, use the formula K = e^(-ΔG°/RT) with the given standard free energy change, the gas constant R, and the temperature in Kelvin.

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If an uncharged particle was placed between particle A and particle B, it would move towards particle A since the electric field lines are stronger and closer together near particle A, indicating a greater electric field strength and a higher concentration of charge.

Looking at the electric field diagram, it appears that the two particles have opposite charges. This is because the electric field lines appear to originate from one particle and end on the other, indicating that there is a difference in charge between them. If the particles were free to move, they would be attracted to each other due to the opposite charges they possess. If a third particle with a positive charge was added to this field, it would be attracted to the negatively charged particle since opposite charges attract each other. If an uncharged particle was placed between particle A and particle B, it would move towards particle A since the electric field lines are stronger and closer together near particle A, indicating a greater electric field strength and a higher concentration of charge.

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Answer:
•No

•They will attract each other

•B

•Neither direction

ON EDGE

True. Angular acceleration is equal to the torque divided by the moment of inertia. The moment of inertia is a measure of an object's resistance to angular acceleration, so if the torque is constant, then the angular acceleration will be proportional to the torque.

Acceleration is the rate at which the velocity of an object changes over time. It is the change in velocity divided by the time taken for the change to occur, measured in meters per second squared (m/s2). Acceleration can result from a change in direction, speed, or both. It can also be caused by an external force, such as gravity, a push, or a pull. Acceleration is an important concept in physics, as it is a key factor in the motion of objects. It can also be used to determine how quickly an object is moving, as well as the forces that affect it.

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Answer: The center of mass is at a distance of 0.36R from the center C' of the smaller circle.

Explanation: To find the position of the center of mass, we can consider the plate without the hole as one object and the removed piece as another object. The center of mass of the plate without the hole is at the center C, which is also the center of the larger circle. The center of mass of the removed piece is at the center C' of the smaller circle.

We can find the distance between these two centers of mass by subtracting the contribution of the removed piece from the center of mass of the plate without the hole. Since the removed piece has a smaller mass and is located at a distance of 0.8R from the center C, the distance between the two centers of mass is (0.8R) - (0.5R) = 0.3R.

Finally, we add the distance between the center C' of the smaller circle and the center of mass of the removed piece, which is R/2, to get the position of the center of mass of the entire plate. Therefore, the center of mass of the plate is located at a distance of 0.3R + 0.5R = 0.8R from the center C, in the direction of the center C'. Thus, the center of mass is located at a distance of 0.36R from the center C'.

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The maximum wind velocity of a 45 degree cross wind for an airplane with a maximum crosswind compensation of 25 knots is 25 knots.

Velocity is a physical quantity that measures both the speed and direction of an object. It is a vector quantity, meaning it has both a magnitude and a direction. Velocity is typically represented as a change in position over a given amount of time, usually expressed in meters per second (m/s). Velocity can be calculated by dividing the change in position by the change in time. Velocity is an important concept in physics and is used to describe the motion of objects in a variety of different scenarios.

This is because the maximum crosswind compensation for the airplane limits the maximum wind velocity of the cross wind. Therefore, if the cross wind has a 45 degree angle, the maximum wind velocity of the cross wind would be 25 knots.

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The mirror displacement d is 317.12 nm. In a Michelson interferometer, interference fringes are created due to the interference of two beams of light.

A Michelson interferometer is a device used to measure small changes in the distance between two mirrors. It consists of a beam splitter, two mirrors, and a detector. One beam of light is split into two and travels to the mirrors, where they are reflected back towards the beam splitter. The two beams of light then recombine at the detector, creating an interference pattern.

When one of the mirrors is moved, the interference pattern shifts. The amount of shift depends on the distance moved and the wavelength of the light being used. By measuring the shift in the interference pattern, we can determine the displacement of the mirror.

In this problem, we are given that 250 interference fringe shifts were counted when the mirror was moved a distance d. The wavelength of the light being used is 632.8 nm.

Each interference fringe shift corresponds to a change in the path difference between the two beams of light by one wavelength. So, the total change in the path difference is 250 times the wavelength of the light:

250 × 632.8 nm = 158,200 nm

Therefore, the mirror displacement d is 158,200 nm. However, this displacement is in both directions (i.e., the mirror moved back and forth). To find the displacement in just one direction, we divide by 2:

d = 158,200 nm / 2 = 79,100 nm

Therefore, the mirror displacement d is 79,100 nm in one direction.

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A resistance of 900 Ω should be connected in series with the galvanometer to convert it into a voltmeter reading 1 V full scale. The answer is option B.

What is Resistance?

Resistance is the opposition offered by a material or device to the flow of electric current through it. It is a measure of how difficult it is for electric current to pass through a material. Resistance is measured in units called ohms (Ω).

The resistance that should be connected in series with the galvanometer to convert it into a voltmeter can be calculated using the formula:

R = (Vg/Ig) - Rg

where R is the resistance to be added, Vg is the full-scale voltage of the voltmeter (1 V), Ig is the full-scale current of the galvanometer (1 mA = 0.001 A), and Rg is the resistance of the galvanometer (100 Ω).

Substituting the values, we get:

R = (1 V / 0.001 A) - 100 Ω

R = 1000 - 100

R = 900 Ω

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The temperature in a classroom is usually around room temperature, which typically ranges from 68-72°F (20-22°C). This means that the temperature is closest to 50°C.

Temperature is a measure of the average kinetic energy of the particles in a system. It is a physical quantity that indicates how hot or cold something is. Temperature is typically measured in units of degrees Celsius (°C) or kelvin (K). Temperature can be affected by many environmental factors, such as air pressure, radiation levels, humidity, and altitude. Heat and cold are also related to temperature, with heat being the result of increased temperature and cold being the result of decreased temperature. Temperature affects many physical and chemical processes, and is an important factor to consider when studying the behavior of matter.

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The torque produced by the 50-n force when a pipe extends the length of the wrench to 0.5 m. is T = 50 N x 0.5 m = 25 Nm.

The torque produced by a force is given by the formula T = F x d, where F is the force applied and d is the perpendicular distance from the force to the point of rotation. In this case, the force is 50 N and the distance is 0.5 m.


To calculate the torque produced by a 50-N force when a pipe extends the length of the wrench to 0.5 m, you can use the formula:

Torque = Force x Lever Arm Length

In this case, the force is 50 N, and the lever arm length is 0.5 m.

Torque = 50 N x 0.5 m

Torque = 25 Nm

So, the torque produced is 25 Newton-meters (Nm).

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The change in length of the 25-m steel bridge span when it undergoes a temperature change of 40 K from winter to summer is 1.8 cm.

Temperature is a measure of the average kinetic energy of the particles in a substance. It is a physical property that can be used to measure and describe the heat of an object or system. Temperature is measured in degrees and can be either Celsius, Fahrenheit, or Kelvin. Temperature is important for all physical, chemical, and biological processes. It affects the rate of reactions, the solubility of substances, and the way organisms interact with their environment.

The linear expansion of a material is calculated using the equation:
Change in Length (ΔL) = coefficient of linear expansion (α) × original Length (L) × Change in Temperature (ΔT).
Therefore, the change in length of the 25-m steel bridge span when it undergoes a temperature change of 40 K from winter to summer is calculated as follows:
ΔL = 12 × 10-6 K-1 × 25 m × 40 K = 1.8 cm.
Hence, the option is D) 1.8 cm.

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According to the question the magnitude of the acceleration is 36 m/s².

Acceleration is the rate of change of an object’s velocity, which is the speed and direction of the object’s motion. Acceleration is caused by a net force, which can come from either an outside source or from internal forces within the object itself. Acceleration is a vector quantity, meaning it has both magnitude (the amount of acceleration) and direction. When an object is accelerating, its velocity changes over time, either increasing or decreasing.

The magnitude of the acceleration of an object moving in a circular orbit is given by the formula:
a = v²/r
where a is the magnitude of the acceleration, v is the velocity of the object and r is the radius of the circular orbit.
In this case, the velocity at time t = 0.75 s is 8 m/s² x 0.75 s = 6 m/s.
Therefore, the magnitude of the acceleration is:
a = 62/6 = 36 m/s².

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a) The impulse imparted to the golf ball is equal to the change in momentum of the ball, which is given by the product of its mass and the change in velocity. The initial velocity of the ball is 45 m/s and its final velocity is 0 m/s (assuming it comes to rest). Therefore, the change in velocity is -45 m/s. The impulse is:

impulse = mass x change in velocity

impulse = 0.045 kg x (-45 m/s)

impulse = -2.025 Ns

b) The average force exerted on the ball by the golf club is equal to the impulse imparted to the ball divided by the time of contact. The time of contact is given as 3.5 x 10^-3 s. Therefore, the average force is:

average force = impulse / time

average force = -2.025 Ns / 3.5 x 10^-3 s

average force = -578.57 N

Note that the negative sign indicates that the force was applied in the opposite direction to the motion of the ball (i.e., the force was in the direction of the club).

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The ratio of the pressure of solar radiation on sphere 2 to that on sphere 1 can be calculated using the equation P = 2I/c which is 1:4.

The pressure of solar radiation on a spherical object can be calculated using the equation P = 2I/c, where P is the pressure, I is the intensity of the radiation, and c is the speed of light.

The intensity of solar radiation at a distance r from the sun is proportional to 1/r². Therefore, the intensity of solar radiation on sphere 1 is 1/1² = 1, and the intensity on sphere 2 is 1/2² = 1/4.

Thus, the pressure of solar radiation on sphere 1 is 2/c, and the pressure on sphere 2 is 2/(4c) = 1/2c. Therefore, the ratio of the pressure of solar radiation on sphere 2 to that on sphere 1 is (1/2c) / (2/c) = 1/4.

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A whitish sky is evidence that the atmosphere contains suspended particles and water droplets.

The whitish appearance of the sky is due to the scattering of sunlight by these particles and water droplets. When sunlight interacts with these particles, it is scattered in all directions, causing the sky to appear white or grey.

This can occur due to natural events like volcanic eruptions, wildfires, or human activities like pollution from industrial processes and vehicle emissions.

The presence of a whitish sky is an indication of suspended particles and water droplets in the atmosphere, which can result from both natural events and human activities.

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The photoelectric effect is a phenomenon in which electrons are emitted from a metal surface when it is exposed to light. This effect was first observed by Heinrich Hertz in 1887.

According to classical physics, light is a wave and should cause the electrons in the metal to vibrate, eventually causing them to be ejected from the surface. However, experimental data showed that the number of electrons emitted from the metal was proportional to the intensity of the light, but not its frequency.

Einstein proposed that light has both wave-like and particle-like properties, and that the photoelectric effect could be explained by the particle-like nature of light. He suggested that light is composed of discrete packets of energy called photons, and that the energy of each photon is directly proportional to its frequency.

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The nuclear binding energy of a carbon-12 atom with a mass defect of 0.09564 amu is approximately 92.62 x 10^-12 J per carbon-12 atom when rounded to three significant figures.

To find the solution, we can use Einstein's famous equation E=mc^2, where E represents energy, m represents mass, and c represents the speed of light.

First, we need to convert the mass defect from amu to kg by multiplying it by 1.66 x 10^-27 kg/amu.

This gives us a mass defect of approximately 1.584 x 10^-26 kg per carbon-12 atom.

Next, we can find the total energy by multiplying the mass defect by the speed of light squared (c^2), which is approximately 9 x 10^16 m^2/s^2.

This gives us a total energy of approximately 1.426 x 10^-10 J per carbon-12 atom.

However, this includes both the nuclear binding energy and the rest mass energy of the atom.

To find just the nuclear binding energy, we need to subtract the rest mass energy of the atom from the total energy.

The rest mass energy of a carbon-12 atom is approximately 1.099 x 10^-10 J per carbon-12 atom, so when we subtract this from the total energy, we get a nuclear binding energy of approximately 3.27 x 10^-11 J per carbon-12 atom.

Finally, we can convert this to scientific notation and round to three significant figures to get the solution of approximately 92.62 x 10^-12 J per carbon-12 atom.

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The energy required to make one He-3 nucleus is 3.27 MeV.

The formation of He-3 can occur through several nuclear reactions, including the fusion of two deuterium nuclei, the decay of tritium, and the capture of a neutron by He-3. The energy required to make one He-3 nucleus varies depending on the specific reaction that is taking place.

However, the fusion of two deuterium nuclei, which produces He-3 and a proton, is one of the most common and energy-efficient reactions used to create He-3. This reaction requires an energy input of 3.27 MeV (mega-electron volts) to overcome the electrostatic repulsion between the positively charged deuterium nuclei and bring them close enough together for the strong nuclear force to take over and fuse the nuclei.

Regarding the balance of nuclear equations, all nuclear reactions must obey the laws of conservation of mass and conservation of charge. This means that the sum of the mass numbers and the sum of the atomic numbers (proton numbers) must be equal on both sides of the equation. Therefore, nuclear equations must be balanced to ensure that the same number of positive charges and the same mass are present on both sides of the equation.

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The statement "A child in a swing makes one complete back and forth motion in 3.2 seconds" provides information about the child's time period.

The time period is the time it takes for one complete oscillation or cycle to occur. In this case, the child completes one back and forth motion, which is one oscillation or cycle. The time it takes for this cycle to occur is 3.2 seconds.

The time period is often denoted by the symbol T and is measured in seconds. It is the inverse of the frequency, which is the number of cycles per unit time.

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To answer this question, we need to use the formula I = P/V, where I is the current in amps, P is the power in watts, and V is the voltage in volts.

For the toaster, I = 1780/120 = 14.83 amps (long answer: The current drawn by the toaster is 14.83 amps.)

For the electric frying pan, I = 1300/120 = 10.83 amps (long answer: The current drawn by the electric frying pan is 10.83 amps.)

For the lamp, I = 70/120 =0.5 8 amps (long answer: The current drawn by the lamp is 0.58 amps.)

Since the devices are in parallel, the total current drawn from the outlet will be the sum of the currents drawn by each device.

Total current = 14.83 + 10.83 + 0.58 = 26.24 amps . The total current drawn from the outlet by all three devices is 26.24 amps.)

Since the circuit has a 15 amp capacity, this means that these three devices should not be used simultaneously on the same circuit.

I'd be happy to help with your question.

To calculate the current (in amperes) drawn by each device, you can use the formula:

Current (A) = Power (W) / Voltage (V)

For the 1,780 W toaster:
Current = 1,780 W / 120 V ≈ 14.83 A

For the 1,300 W electric frying pan:
Current = 1,300 W / 120 V ≈ 10.83 A

For the 70 W lamp:
Current = 70 W / 120 V ≈ 0.58 A

So, the current drawn by the toaster is approximately 14.83 A, by the electric frying pan is approximately 10.83 A, and by the lamp is approximately 0.58 A.

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According to the question the angular displacement of the disk is 76.5 rad.

Angular displacement is a measure of the change in angle of a rotating object relative to its initial position. It is a vector quantity, meaning it has both magnitude and direction. In two-dimensional motion, angular displacement is measured in radians, which are defined as the angle subtended by an arc of a circle with the same length as the radius of the circle. In three-dimensional motion, angular displacement is measured in a unit called a steradian, which is the solid angle subtended by an object. Angular displacement is an important concept in physics, as it can be used to calculate the angular velocity or angular acceleration of a rotating object.

At t = 3.0 s, the angular velocity of the disk is:
Angular velocity (ω) = 8.5 rad/s² x 3 s = 25.5 rad/s
The linear velocity of the disk is:
Linear velocity (v) = (2π x 11 cm) x 25.5 rad/s = 156.5 cm/s
The angular displacement of the disk is:
Angular displacement (θ) = 8.5 rad/s² x (3 s)² = 76.5 rad.

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The direction of the magnetic field of a current-carrying wire can be determined using the right-hand rule.

This rule states that if you wrap your right-hand fingers around the wire in the direction of the current flow, with your thumb pointing in the direction of the wire, your curled fingers will point in the direction of the magnetic field.

So, to detail ans this question, we need to know the direction of the current flow in the wire in order to determine the direction of the magnetic field.

To determine the direction of the magnetic field of a current-carrying wire, you can follow these steps using the Right-Hand Rule:

Straighten your right hand with your thumb pointing up.
Wrap your fingers around the wire with your thumb pointing in the direction of the conventional current (from positive to negative).
The direction in which your fingers curl around the wire represents the direction of the magnetic field.

So, to determine the direction of the magnetic field of the current-carrying wire, simply apply the Right-Hand Rule.

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