a wave has wavelength of 12 m and a speed of 68 m/s. what is the frequency of the wave?

Answer:

Yes, you are pulling on Earth. Reasoning. Third Newton's law of motion, action and reaction law, sates that for every action force, there is an equal (in magnitude) and opposite reaction force.

Explanation:

goo gle.

Answer:

7 m

Explanation:

They began walking 6 meters to the right, so +6.

Then 3 meters left so -3,

And then 4 meters to the right again so +4.

4+6-3=7 meters

Answer:

B.

Explanation:

w=mg

g=10m/s

hope this helps

Alpha particles have highest mass.

Alpha particles are most ionising.

Gamma particles are the most penetrating.

Beta particles are negatively charged.

Gamma particles have the highest speed.

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Answer:

motion changes with time of the position or orientation of a body. Motion that changes the orientation of a body is called rotation.

Explanation:

A torque's characteristic direction can be categorized as either clockwise or counterclockwise.

The rotational counterpart of linear force is torque. Depending on the subject of study, it is also known as the moment, moment of force, rotating force, or turning effect. It represents a force's ability to cause a change in the body's rotational motion.

Magnitude is referred to as an object's maximal size and direction.

A torque's characteristic direction can be categorized as either clockwise or counterclockwise.

It is possible to describe the direction of a torque as clockwise or counterclockwise, and the magnitude of the torque produced by a given force is equal to Fd.

A torque's characteristic direction can be categorized as either clockwise or counterclockwise.

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When an airplane travels 640 miles from Topeka to Houston in 3. 2 hours, going against the wind. The return trip is with the wind and takes only 2 hours. Then the rate of the airplane with no wind is 260 miles/hr, and the rate of the wind is 100 miles/hr

Let Va is the velocity of the airplane

Va is the velocity of the wind

When flying against the wind then

(Va+Vw)*(3.2 hours) = 640

3.2Va + 3.2Vw = 640

3.2Vw = 640 - 3.2Va

Vw = 200 - Va----------------(1)

When flying with the wind:

(Va-V)*(2 hours) = 640km

2Va - 2Vw = 640

Va - Vw = 320 ----------------(2)

Putting the value of VW in equation (2) we get

Va - (200-Va) = 320

2Va = 320 +200

2Va = 520

Va = 260

Putting this value in equation (2)

Vw =Va - 360

Vw = 100

Therefore the rate of the airplane with no wind is 260 miles/hr, and the rate of the wind is 100 miles/hr

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Answer:

Explanation:

The force acting on an object given it's mass and acceleration can be found by using the formula

force = mass × acceleration

From the question

3800 g = 3.8 kg

We have

force = 3.8 × 4.5

We have the final answer as

Hope this helps you

Two tiny spheres of mass 6.30 mg carry charges of equal magnitude, 77.0 nC, but opposite signs. They are suspended from a ceiling hook by light strings of length 0.530 mm. When a horizontal uniform electric field is applied, the spheres hang at rest with an angle θ of 58.0° between the strings.

The equilibrium position of the spheres is achieved when the electrical force on each sphere balances the gravitational force. The gravitational force is given by the weight of the spheres, which is the product of their mass and the acceleration due to gravity (9.8 m/s^2). The electrical force is determined by the electric field and the charge on the sphere. Since the spheres have opposite charges, they experience forces in opposite directions.

To find the electric field strength, we need to calculate the tension in the strings. The tension in each string can be decomposed into vertical and horizontal components. The vertical component balances the weight of the spheres, while the horizontal component balances the electrical forces. By considering the geometry of the problem, we can relate the tension components to the angle θ.

Using trigonometry, we can express the horizontal tension component as T sin(θ) and the vertical tension component as T cos(θ), where T is the tension in the strings. Equating the electrical force (qE) to T sin(θ) and the weight of the spheres (mg) to T cos(θ), we can solve for the electric field E.

The resulting electric field strength can be calculated using the known values for the charges, masses, and angle θ. By substituting these values into the equations and solving them simultaneously, we can determine the magnitude of the electric field.

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One argument against standardized advertising is that a single large campaign may not be as effective as multiple smaller efforts, and it overlooks the potential of utilizing local talent from different cultures.

Standardized advertising refers to the practice of creating a single advertising campaign that is intended to be used across multiple markets or regions. However, one of the arguments against this approach is that a large-scale effort may not produce better results compared to multiple smaller campaigns. Different markets have unique characteristics, preferences, and cultural nuances that can significantly impact the effectiveness of an advertising campaign. By implementing smaller, localized efforts, advertisers can tailor their messaging to better resonate with the specific target audience in each market.

Furthermore, standardized advertising often neglects the valuable resource of local talent available in different cultures. Advertising that is created by individuals who understand the local language, customs, and consumer behaviors can be more authentic and relatable to the target audience. Local talent brings an inherent understanding of the cultural context and can craft messages that are culturally sensitive and appropriate. By overlooking the expertise and insights of local talent, standardized advertising may miss opportunities to connect with consumers on a deeper level and effectively communicate the brand's message.

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Answer:

your answer is 0.814.

Explanation:

you divide the total distance traveled by the time taken

Answer:

Answer

Advantages of alcohol over Mercury

(a) Freezing point of alcohol is −117∘

C and hence can record very low temperature For example in Arctic and Antarctic regions temperature may fall below −80∘

C which cannot be measured by mercury thermometer because mercury freezes at−39 ∘ C

(b) The expansion of alcohol per degree rise in temperature is much more around six times more then that of mercury and hence is more sensitive

(c) it can be coloured brightly by adding some dye in it and hence is easily detectable

A common activity like cooking a meal can use many natural Ingredients

Ingredients are substances combined to make a particular mixture such as a meal. most of the ingredients used for the preparation of a meal are sourced naturally.

In cooking different recipes of a meal the use of specific ingredients for each recipe differentiates the recipes.

Therefore we can conclude that cooking a meal requires the use of natural ingredients.

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The photon's wavelength is 4.84 x 10^-8 meters. We can use the de Broglie wavelength formula to calculate the wavelength of a photon with the same momentum as an electron.

The de Broglie wavelength is:

λ = h / p,

where h is Planck's constant (about 6.626 x 10^-34 J·s) and p is momentum.

For an electron, p is:

p = m × v,

where m and v are the electron's mass and velocity.

Given: m (electron mass) = 9.11 x 10^-31 kg v (electron velocity) = 1500 m/s

Substituting these values into the equation yields the electron's momentum:

p = (9.11 x 10^-31 kg) × (1500 m/s) = 1.37 x 10^-27 kg·m/s

We can now compute the photon's wavelength using the de Broglie wavelength formula:

= 6.626 x 10^-34 J·s / 1.37 x 10^-27 kg·m/s = 4.84 x 10^-8 m

Thus, the photon's wavelength is 4.84 x 10^-8 meters.

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Answer:

a=0.84m/s²

Explanation:

a=v-u/t

where a=acelleration of the car,u=initial velocity,v=final velocity, t=time taken

a=?,u=15km/h,v=30km/h,t=5s

velocity is in m/s and we were given in km/h so we convert

or we say

v-u=30-15=15km/h

(v-u)=15×1000/3600=4.2m/s

a=v-u/t

a=4.2/5

a=0.84m/s²

Answer:

Con Agra and Sare Lee

Explanation:

The current in each resistor is 4 A, 2 A, and 4 A, respectively. The voltage drop across each resistor is 12 V.

When three resistors are connected in series with a six resistor and a 12-volt battery, the total resistance of the series circuit is R = R1 + R2 + R3 + ...

The current flowing through the circuit is the same at every point. So, if we want to know the current flowing through each resistor, we need to use Ohm's law, I = V/R, where V is the voltage of the battery and R is the resistance of each resistor.

I1 = V/R1 = 12/3 = 4 AI2 = V/R2 = 12/6 = 2 AI3 = V/R3 = 12/3 = 4 A. The voltage drop across each resistor can be calculated using Ohm's law, V = IR.

V1 = I1R1 = 4 x 3 = 12 VV2 = I2R2 = 2 x 6 = 12 VV3 = I3R3 = 4 x 3 = 12 V.

Therefore, the current in each resistor is 4 A, 2 A, and 4 A, respectively. The voltage drop across each resistor is 12 V.

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(a) When l = 2, the possible magnetic quantum numbers (mₑ) are -2, -1, 0, 1, and 2.(b) When l = 4, the possible magnetic quantum numbers (mₑ) are -4, -3, -2, -1, 0, 1, 2, 3, and 4.

(a) The magnetic quantum number (mₑ) represents the projection of the orbital angular momentum along a chosen axis. It takes on integer values ranging from -l to +l, including zero. When l = 2, the possible values for mₑ are -2, -1, 0, 1, and 2. These values represent the five different orientations of the orbital angular momentum corresponding to the d orbital.

(b) Similarly, when l = 4, the possible values for mₑ are -4, -3, -2, -1, 0, 1, 2, 3, and 4. These values represent the nine different orientations of the orbital angular momentum corresponding to the f orbital. The range of values for mₑ is determined by the value of l and follows the pattern of -l to +l, including zero.Therefore, when l = 2, the possible magnetic quantum numbers (mₑ) are -2, -1, 0, 1, and 2. And when l = 4, the possible magnetic quantum numbers (mₑ) are -4, -3, -2, -1, 0, 1, 2, 3, and 4.

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The description of the nature of image formed 2nd if the object X distance from the pole of mirror then find image distance from the pole 3rd if the radius of curvature of mirror is are then write the relation between object distance image distance and focal length of the mirror give one use of concave mirror is given below

A concave mirror is a mirror with a curved, inwardly facing surface. When an object is placed in front of a concave mirror, the mirror will form an image of the object. The nature of the image formed depends on the position of the object relative to the mirror.

To find the image distance from the pole of the mirror, you can use the mirror equation:

1/image distance + 1/object distance

= 1/focal length.

If the object is X distance from the pole of the mirror, you can substitute this value for the object distance in the mirror equation to find the image distance.

The relationship between the object distance, image distance, and focal length of a concave mirror can be expressed using the mirror equation:

1/image distance + 1/object distance

= 1/focal length.

This equation tells us that the sum of the reciprocals of the object distance and image distance is equal to the reciprocal of the focal length.

Therefore, One use of a concave mirror is as a reflector in a flashlight or car headlight. The concave mirror focuses the light to a point in front of the mirror, creating a bright beam of light that can be directed at a specific location.

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Answer:

The atoms in Damien’s candy are vibrating faster.

When the atoms in something are going at rapid speeds they create heat.

After a warm front passes through the air, the air becomes more warm and humid.

If warm air mass replaces the cold air mass, it is called as warm front. A warm front is called as transition zone. Warm fronts usually move from southwest to northeast. Warm fronts move slower than cold fronts.

When a warm front passes over a region there will be some significant weather changes. Before the warm front passes precipitation will be light to moderate, snow, sleet or drizzle and after the front has passed there will be usually no precipitation.

Therefore, after a warm front passes through the air, the air becomes more warm and humid.

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The acceleration of the block is 6.4 m/s².

To calculate the acceleration of the block, we need to consider the forces acting on it.

The applied force is 40 N, and since it is the only horizontal force in the direction of motion, it is the net force acting on the block.

The frictional force opposing the motion is 8 N.

The acceleration, we can use Newton's second law, which states that the net force acting on an object is equal to its mass multiplied by its acceleration (F = ma).

The net force is the difference between the applied force and the frictional force:

40 N - 8 N = 32 N.

Now, we can plug the values into Newton's second law:

32 N = 5 kg × a.

Solving for the acceleration (a), we get

a = 32 N / 5 kg

a = 6.4 m/s².

Therefore, the acceleration of the block is 6.4 m/s².

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Answer:

t = 0.97 s

Explanation:

Given that,

height, h = 4.7 m

We need to find the time taken by the object to fall 4.7 m.

Let it is t. Using second equation of kinematics to solve it such that,

\(h=ut+\dfrac{1}{2}gt^2\)

u is initial velocity, u = 0

So,

\(h=\dfrac{1}{2}gt^2\\\\t=\sqrt{\dfrac{2h}{g}}\\\\t=\sqrt{\dfrac{2\times 4.7}{9.8}}\\\\t=0.97\ s\)

So, the required time is equal to 0.97 seconds.

The time it would take the object is 0.98 secs

From the question,

We are to determine how much time it would take for an object to fall 4.7 meters. That is, the time it would take the object to fall from a height 4.7 meters.

From one of the equations of motions for free falling object.

\(h = ut + \frac{1}{2} gt^{2}\)

Where h is the height

u is the initial velocity

t is the time

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

Since, the object is dropped from rest, the initial velocity, u, is 0 m/s

From the given information,

h = 4.7 m

Putting the parameters into the equation, we get

\(4.7 = 0(t) +\frac{1}{2} (9.8)t^{2}\)

\(4.7 = 0 + 4.9t^{2}\)

\(4.7 = 4.9t^{2}\)

∴ \(t^{2} = \frac{4.7}{4.9}\)

\(t^{2}= 0.9592\)

\(t = \sqrt{0.9592}\)

t = 0.98 secs

Hence, the time it would take the object is 0.98 secs

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The momentum of the dog will be 50Kgm/s.

Momentum is the product of the mass of a body and its velocity. Momentum is a vector quantity meaning it has both magnitude and direction.

From Isaac Newton’s second law of motion which states that the time rate of change of momentum is equal to the force acting on the body.

Also, according to Newton’s third law, when a force is applied on a body there is an equal and opposite reaction, so any change in the momentum of one body is balanced by an equal and opposite change of the momentum of another body. So, in the absence of any external force acting on a collection of bodies, their total momentum never changes; this is the law of conservation of momentum.

Momentum, p = mass (m) x velocity (v)

where m = 10kg

v = 5m/s

p = 10 x 5

p = 50kgm/s.

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heat food, warm water

The acceleration of the car, which starts from 0 mph and reaches 70.0 mph in 6 seconds, is approximately 355,019 m/\(h^{2}\)..

To calculate the acceleration, we need to convert the given speeds from mph to m/s and the time from seconds to hours.

First, let's convert the speeds.

0 mph is equivalent to 0 m/s, and 70.0 mph is approximately 31.29 m/s.

Next, let's convert the time.

6 seconds is equal to 0.00167 hours.

Now we can calculate the acceleration using the formula:

Acceleration = (Final Velocity - Initial Velocity) ÷ Time.

Substituting the values, we get:

Acceleration = (31.29 m/s - 0 m/s) ÷ 0.00167 hours.

To convert the answer to m/\(h^2.\), we need to multiply it by the conversion factor (3600 seconds/hour)\(^2.\)

Evaluating the expression and applying the conversion, we find:

Acceleration ≈ 355,019 m/\(h^{2}\).

Therefore, the acceleration of the car, in m/\(h^{2}\) units, is approximately 355,019 m/\(h^{2}\).

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Answer:

Explanation:

For free body diagram see attached sheet .

W is weight of steel girder acting at the middle point of its length . T is tension in the cable .

OB = √ ( 12² - 2² )

= 11.83 m .

OC = 11.83 / 2 = 5.915 m

Taking moment of tension T and weight W about point O

W x OC = T x OB

22 x 5.915 = T x 11.83

T = 22 x 5.915 / 11.83

= 11 kN

Considering forces acting in vertical direction and equating forces in opposite direction

T + R = W

R = W - T

= 22 - 11 = 11 KN

So force of grinder on the ground = R

= 11 KN.

To find the equivalent resistance, we can use two ways:

1. To find the equivalent resistance of a circuit, we need to know the resistances of all the individual resistors and how they are connected. There are several methods for finding the equivalent resistance depending on the circuit configuration.

Here are some common circuit configurations and their equivalent resistance formulas:

Resistors connected in series have an equivalent resistance that is equal to the total of their individual resistances.

Req = R1 + R2 + R3 + ...

Resistors in parallel: The equivalent resistance of resistors connected in parallel can be calculated using the formula:

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

Combination of series and parallel resistors: For circuits with a combination of series and parallel resistors, we can use a combination of the above formulas to find the equivalent resistance.

First, we can simplify the series resistors and replace them with their equivalent resistance (sum of individual resistances). Then, we can simplify the parallel resistors by replacing them with their equivalent resistance (1/sum of individual resistances).

Finally, we can add up all the equivalent resistances to find the total equivalent resistance of the circuit.

2. To find the equivalent resistance of a circuit, we need to use Ohm's Law and Kirchhoff's Laws. First, calculate the resistance of each individual resistor in the circuit. Then, use Kirchhoff's Laws to determine the total current and voltage in the circuit. Finally, use Ohm's Law to calculate the equivalent resistance by dividing the total voltage by the total current.

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