is 2/2 1 or 0? please help lol

The time that takes for a small bag of sand to reach the ground after it is released from an ascending hot-air balloon whose upward velocity is 2.25 m/s is 2.94 s.  

We can find the time that takes for the bag to reach the ground with the following equation:

\( y_{f} = y_{i} + v_{i_{y}}t + \frac{1}{2}gt^{2} \)   (1)

Where:            

\( y_{f} \): is the final height = 35.8 m

\( y_{i} \): is the initial height = 0

\( v_{i_{y}} \): is the initial velocity = 2.25 m/s

t: is the time =?

g: is the acceleration due to gravity = 9.81 m/s²

When the bag is released, it will move upward until it reaches a maximum height and then begins to fall. We can find the time that takes for the bag to reach the maximum height as follows:      

\( v_{f} = v_{i} - gt \)  (2)

Where:

\( v_{f} \): is the final velocity = 0 (at the maximum height)

\( v_{i} \): is the initial velocity = 2.25 m/s

The time is:        

\( t = -\frac{v_{f} - v_{i}}{g} = \frac{2.25 m/s}{9.81 m/s^{2}} = 0.23 s \)

This is the rise time it takes for the bag to reach the maximum height, which is equal to the fall time it takes for the bag to reach the same starting point (35.8 m above the ground), so:

\( t = 0.23 s*2 = 0.46 s \)

Now, from equation (1) we have:

\( 35.8 m = 0 + 2.25 m/s*t + \frac{1}{2}9.81 m/s^{2}*t^{2} \)    

By solving the above quadratic equation for t we have:

\( t = 2.48 s \)    

Hence, the total time is:

\( t = 2.48 s + 0.46 s = 2.94 s \)

Therefore, the time that it takes for the bag to reach the ground is 2.94 s.

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a. the speed of the ultrasound in water is 1480 m/s

b. the wavelength of the ultrasound in water is 37 m

c. the depth of the fish below the boat is 89.76 m

a.

v = fλ

v = fλ = (4.0 x 10^2 Hz)(λ)

the speed of the ultrasound in water is given as :

v = v_water = 1480 m/s

substitute v_water into the equation above and solve for λ:

λ = v_water / f = (1480 m/s) / (4.0 x 10^2 Hz) = 37 m

Therefore,  the speed of the ultrasound in water is 1480 m/s and the wavelength is 37 m.

c. The depth of the fish below the boat ia found using,

d = v_water * t / 2

The first echo came back after 0.09 s:

d = (1480 m/s) * (0.09 s) / 2 = 64.32 m

This is the depth of the sea bed, which is already known to be 64 m. So the fish must be deeper than the sea bed, and the second echo must have come from the fish. The second echo came back after 0.12 s:

d = (1480 m/s) * (0.12 s) / 2 = 89.76 m

So the depth of the fish below the boat is 89.76 m

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Answer:

Explanation:

Wavelength = 100m. Speed = V. 2.) Frequency = 20 Hz. Wavelength = 200 m. Speed = ... 2=1.7m. F=Y/2 f=2×10. 5.) Wavelength = 502 km. Speed= 100 m/s.

Answer:

47.46 kilometers an hour

Explanation:

hope this helped

0.8 km/h

speed = distance / time

Answer:electric current can be generated by moving a metal wire through a magnetic field .electric current can also be produced by batteries

Explanation:

electric current can be generated by moving a metal wire through a magnetic field.this method is applicable in electric generators.

Electric current can also be generated by connecting metal wires to batteries.

Answer:

13m

Explanation:

North and East are perpendicular so if you illustrate this it will be a right-angle triangle;

One side will be 12 and the another will be 5;

The hypotenuse will be the desired distance;

We can use pythagoras to calculate it:

5² + 12² = x²

25 + 144 = x²

169 = x²

x = 13

Answer:

a)     vfₓ = m₁ / (m₁ + m₂) v₁,  b)    tan θ  = m₂ / m₁ v₂ / v₁, c)

Explanation:

Momentum is a vector quantity, so the consideration must be fulfilled in all axes

a) conservation of the moment east-west direction

the system is formed by the two cases, so that the forces during the sackcloth have been internal and therefore the mummer remains

before the crash

                 p₀ = m₁ v₁

after the crash

                 \(p_{f}\)= (m1 + m2) vfₓ

                p₀ = pf

                m₁ v₁ = (m₁ + m₂) vfₓ

              vfₓ = m₁ / (m₁ + m₂) v₁

b) conservation of the North-South axis moment

before the shock

                p₀ = m₂ v₂

after the crash

              p_{f} = ( m₁ +m₂) \(vf_{y}\)  

             p₀ = p_{f}

            me 2 v₂ = (m₁ + m₂) vfy

            \(vf_{y}\) = m₂ / (m₁ + m₂) v₂

c) the angle with which the car moves is

             tan θ = Vfy / Vfₓ

             tan θ = [m₂ / (m₁ + m₂) v] / [m₁ / (m₁ + m₂) v₁]

             tan θ  = m₂ / m₁ v₂ / v₁

The momentum conservation equation for the north-south components is \(m_1u_1 = v(m_1 + m_2)\)

The momentum conservation equation for the north-south components is \(m_2u_2 = v(m_1 + m_2)\)

The tangent of the angle is 1.

The given parameters;

Apply the principle of conservation of linear momentum of inelastic collision as shown below;

\(m_1u_1 + m_2u_2 = v(m_1 + m_2)\)

The momentum conservation equation for the east-west components is written as follows;

\(m_1(u_1cos \ 0) + m_2(u_2 cos 90)= v(m_1 + m_2)\\\\m_1u_1 = v(m_1 + m_2)\)

The momentum conservation equation for the north-south components is written as follows;

\(m_1(u_1sin 0) + m_2(u_2sin90) = v(m_1 + m_2)\\\\m_2u_2 = v(m_1 + m_2)\)

The tangent of the angle is calculated as follows;

\(tan \ \theta = \frac{p_y}{p_x} = \frac{v(m_1 + m_2)}{v(m_1 + m_2)} \\\\tan \ \theta = 1\\\\\theta = tan^{-1} (1) \\\\\theta = 45\ ^0\)

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Transmission coefficients are used in physics and electrical engineering when considering wave propagation in discontinuous media. The snells law is n₁sinθ1 = n₂sinθ2

The transmission coefficient describes the amplitude intensity or total power of the transmitted wave relative to the incident wave. The transmission coefficient is defined as the ratio of the transmitted particle flux to the incident particle flux and depends on the incident energy.

The sum of the reflected and transmitted energy must equal the total incident energy, so the transmission coefficient is calculated simply by subtracting the reflection coefficient. The ratio of the reflected wave amplitude to the incident wave amplitude is called the reflection coefficient.

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A new planet that supports life would have all the following characteristics except an orbiting moon. Hence, option B is correct.

An enormous, spherical celestial object known as a planet is neither a star nor its remains. The nebular hypothesis, which states how an interstellar cloud falls out of a nebula to produce a young protostar encircled by a protoplanetary disk, is now the best explanation for planet formation.

By gradually accumulating material under the influence of gravity, or accretion, planets develop in this disk.

The rocky planets Mercury, Venus, Earth, and Mars, as well as the giant planets Jupiter, Saturn, Uranus, and Neptune, make up the Solar System's minimum number of eight planets. These planets all revolve around axes that are inclined relative to their respective polar axes.

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Answer:

Step 1: List the mass and velocity of the object. Step 2: Convert any values into SI units (kg, m, s). Step 3: Multiply the mass and velocity of the object together to get the momentum of the object.

We can calculate the time taken by the compass to hit the ground by using kinematic equations of motion. The motion of the compass is a free-fall motion since it is only under the influence of gravity. When the compass is dropped, it is initially at rest.

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We have that the total pipe drip of \(X=155 mL/min.\) expressed in gallons/day is

\(X=58.96gal/day\)

From the Question we are told that

Pipe Drip\(=155 mL/min.\)

Generally

We have that for mL to gallons conversion

\(1mL=0.000264172\)

And

A minute to day con version is

\(1min=0.000694444\)

Therefore

\(X=155 mL/min.\)

\(X=155(\frac{0.000264172}{0.000694444})\)

\(X=58.96gal/day\)

In conclusion

The total pipe drip of \(X=155 mL/min.\) expressed in gallons/day is \(X=58.96gal/day\)

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true

Explanation:

computers have become a need in many businesses and homes we now living in a era of technology a computer is now a neccecity

The statement is True.

Personal computers have become an essential fixture in most businesses and households.

They have revolutionized the way we work, communicate, access information, and perform various tasks.

In the business world, personal computers are ubiquitous, serving as indispensable tools for productivity, data management, communication, and decision-making.

From small businesses to large corporations, computers have streamlined operations and enhanced efficiency.

Similarly, in homes, personal computers have become commonplace, enabling individuals and families to connect with the world, pursue online education, engage in entertainment, and manage various aspects of their lives.

With their versatility and functionality, personal computers have become an integral part of modern life, transforming the way we live and work.

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Answer:

Its true

Explanation:

The acceleration on a body of mass 2kg with a force of 25N is 12.5 m/s^2

Given Data

We know that the expression for the Relationship between force acceleration and Mass is given as

F = ma----------------1

Substituting our given data into the expression we have

25 = 2*a

Making acceleration the subject of the formula we have

a = 25/2

a = 12.5 m/s^2

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Given:

Speed = 41 m/s

Time taken, t = 2 hours

Let's find the distance.

To find the distance, apply the formula:

DIstance = speed x time

Convert the speed fro meter per second to meter per hour (m/h).

Where:

1 hour = 3600 seconds

We have:

Speed = 41 x 3600 = 147600 m/h

To find the distance, we have:

DIstance = 147600 x 2 = 295200 meters

Convert the distance from meters to kilometers.

Where:

1 km = 1000 meters

Thus, we have:

Therefore, we can say you travelled 295.2 kilometers.

ANSWER:

295.2 km

Answer:

0.072, 0.062, 0

Explanation:

Flux = magnetic field B * area A * cos(angle between B and normal of A)

= 1.25 * 0.24^2 * cos(angle) = 0.072 * cos(angle)

a) angle = 0°, flux = 0.072 Wb

b) angle = 30°, flux = 0.072*cos(30) = 0.062 Wb.

c) angle = 90°, flux = 0

The final temperature of both substances is closer to the intital temperature of substance A than the initial temperature of substance B.

What is specific heat capacity?

In thermodynamics, the specific heat capacity of a substance is the heat capacity of a sample of the substance divided by the mass of the sample, also sometimes referred to as massic heat capacity.

Specific Heat Capacity, in physics, is the quantity of heat necessary to increase 1 Kelvin per 1 kilogram of substance, i.e., each substance has its own specific heat capacity.

Substances with different temperatures when in contact with each other reach the same final temperature.

A's specific heat capacity is twice as big as B's specific capacity. This means it is necessary twice as much heat for B to reach its final temperature. Therefore, the final temperature is closer to the initial temperature of substance A.

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The % element x in the compound is option c.25%.

To find the percentage of element X in the compound, we need to calculate the ratio of the number of atoms of element X to the total number of atoms in the compound and then convert it to a percentage.

Given:

Total number of atoms = 44

Number of atoms of element X = 11

To calculate the percentage, we can use the following formula:

Percentage of element X = (Number of atoms of element X / Total number of atoms) * 100

Substituting the given values, we get:

Percentage of element X = (11 / 44) * 100

Simplifying the equation, we have:

Percentage of element X = 0.25 * 100

Percentage of element X = 25%

Therefore, the percentage of element X in the compound is 25%.

The correct answer is option C. 25%.

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apply the formula:

T°C = (T°F-32) x 5/9

T°C = (105 - 32) x 5/9

T°C = 73 x 5/9

T° = 40.56°C

Answer:

acceleration

Explanation: how fast something can get to a certain speed

Hi there!

We can begin by deriving the magnetic field strength for a circular loop at its center.

Using Biot-Savart's Law:
\(dB = \frac{\mu_0}{4\pi }\frac{idl \times \^r}{r^2}\)

μ₀ = Permeability of free space (Tm/A)

dl = Differential length element

r = radius (m)

We can rather use 'ds' to represent a differential arc length since we are finding the magnetic field for a circular loop.

We must begin by dealing with the cross-product. Luckily, this derivation is simple since the radius vector is ALWAYS perpendicular to the path of integration along the loop's circumference. (ONLY if we are finding the field for the direct center.) Thus, since sin(90) = 1, we can get rid of the cross-product.

Therefore:

\(dB = \frac{\mu_0}{4\pi }\frac{ids}{r^2}\)

Now, we can integrate with respect to ds.

\(= \frac{\mu_0}{4\pi }\int\limits^{2\pi r}_0 {\frac{i}{r^2}} \, ds\\\\ = \frac{\mu_0}{4\pi }{\frac{i * 2\pi r}{r^2}} \, ds\)

Simplify:

\(B = \frac{\mu_0 i_{circle}}{2r}\\\)

Now, for a straight conductor (assuming of infinite length), we know the magnetic field strength equation to be:

\(B = \frac{\mu_0 i_{rod}}{2\pi r}\)

Set the two equal.

\(\frac{\mu_0 i_{circle}}{2r}= \frac{\mu_0 i_{rod}}{2\pi r}\)

Cancel out '2', μ₀, and 'r':
\(i_{circle}}= \frac{ i_{rod}}{\pi }\)

Plug in the given values and solve.

\(40\pi = i_{rod}\\\\i_{rod} = \boxed{125.663 A}\)

if the waves are exactly in phase at s1 and s2, a path difference can cause a phase difference between them.

at the screen is zeroIn comparison to the waves coming from S 2, the waves from S 1 have arrived exactly one cycle sooner. As a result, we claim that there is a route difference of about between the two waves (wavelength). The path difference will be 0 if the waves from two disturbances travel the same distance.When waves from two different sources collide, two-point source interference develops. Circular wavefronts will collide within the medium to create a pattern if the wave source generates circular waves. The antinodal lines and nodal lines, which are a collection of nodes and antinodes that lie along roughly straight lines, are what define the pattern. If the frequency of the wave sources is the same

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(a) The weight of the drop is 1.54 x 10⁻²⁵ N,

(b) The the charge on the drop, in terms of e is 5 x 10⁻¹²e and

(c) The excess electrons is 5 x 10⁻¹² electron.

The weight of the drop is calculated as follows;

Volume of the drop; V = ⁴/₃πr³

V = ⁴/₃π(1.64 x 10⁻⁶)³ = 1.845 x 10⁻¹⁷ m³

mass = density x volume

mass =  0.851 g/cm³ x  1.845 x 10⁻²³ cm³ = 1.572 x 10⁻²³ g =  1.57 x 10⁻²⁶ kg.

Weight = 1.57 x 10⁻²⁶ kg x 9.8 m/s² = 1.54 x 10⁻²⁵ N.

q = F/E

q = (1.54 x 10⁻²⁵ N)/(1.92 x 10⁵)

q = 8.01 x 10⁻³¹ C

1.6 x 10⁻¹⁹ C = 1e

8.01 x 10⁻³¹ C = ?

= 5 x 10⁻¹²e

1.6 x 10⁻¹⁹ C ------- 1 electron

8.01 x 10⁻³¹ C ------- ?

= 5 x 10⁻¹² electron

Thus, the weight of the drop is 1.54 x 10⁻²⁵ N, the the charge on the drop, in terms of e is 5 x 10⁻¹²e and the excess electrons is 5 x 10⁻¹² electron.

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The energy efficiency of the car is approximately 16.7%.

The energy efficiency of a car is the ratio of the useful work output (in this case, the kinetic energy of the car) to the total energy input (in this case, the energy released by burning the gasoline). The equation for energy efficiency is:

The useful work output can be calculated as the kinetic energy of the car using the equation:

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

Substituting the given values:

The total energy input is the energy released by burning 0.1 L of gasoline, which is:

Substituting these values into the equation for efficiency:

Therefore, the energy efficiency of the car is approximately 16.7%.

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You know now that 1200 km is 11° of latitude on the planet. So its circumference is roughly approximately around something like about

(360/11) • (1200 km) = 39,273 km

If it was good enough for Eratosthenes, then we can't complain.

Answer: Displacement = -2.39 m

Explanation: The displacement of an object is the difference between its final position and its initial position. In this case, the object moved from x = -1.88 m to x = -4.27 m, so its displacement is:

Displacement = Final position - Initial position

Displacement = (-4.27 m) - (-1.88 m)

Displacement = -4.27 m + 1.88 m

Displacement = -2.39 m

Therefore, the displacement of the object is -2.39 m.

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