A cold drink initially at 39 f warms up to 42 f in 4 min while sitting in a room of temperature 72 f. how warm will the drink be if left out for 15 min?

Answer:

33.3m

Explanation:

Recall that for a regular wave, the relationship between, wavelength, frequency  and velocity (speed) is given by :

v = fλ,

where:

v = velocity (speed) of the wave = 50m/s

f = frequency of the wave = 1.5 Hz

λ = wavelength (we are asked to find this)

simply substitute the given values into the equation:

v = fλ

50 = 1.5 λ,

λ = 50/1.5

λ = 33.3m

Answer: \(3.5\ km\)

Explanation:

Given

Car starts from the state of rest and acquires a velocity of \(70\ km/hr\) in 6 minutes

Final velocity in m/s is \(v=70\approx 19.44\ m/s\)

Using equation of motion

\(v=u+at\\\Rightarrow 19.44=0+a(6\times 60)\\\Rightarrow a=0.054\ m/s^2\)

Distance covered in 360 s

\(\Rightarrow v^2-u^2=2as\\\Rightarrow 19.44^2-0=2\times 0.054\times s\\\Rightarrow s=3500.64\ m\approx 3.5\ km\)

Answer: constant, changing

Explanation:

When the velocity of a body is constant the distance-time graph of the body shows a slanting line with a constant slope, which is governed by the formula:

velocity = Displacement/time

therefore, if the slope of the line in the distance-time graph is constant then it represents.

When the velocity of a body keeps changing then the various equation of motion come into play. And the slope of the graph at any point on the distance-time plot represents velocity at that particular instant. This is governed by the formula:

S = Ut + 1/2at^2 which is similar to the equation of the line which is y = mx + c

Here u is the velocity that represents the slope, which keeps changing.

What is the correct equation for velocity:

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Explanation:

Because they evolved rapidly, and moulted like other arthropods,trilobites serve as excellent index fossils, enabling geologists to date the age of the rock in which they are found

The food substance being used which turned Fehling's solution to brick red is a reducing sugar.

This is an indicator which is used to test for the presence of reducing sugar or aldehydes in a solution.

Brick red precipitate of copper(I) oxide is formed when it tests positive to compounds such as glucose etc.

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The frequency of the second harmonic of a note with a fundamental frequency of 200 Hz is 400 Hz, and the frequency of the third harmonic is 600 Hz.

To calculate the harmonics of a note, you will need to know the fundamental frequency of the note. The frequency of the second harmonic is twice the fundamental frequency, and the frequency of the third harmonic is three times the fundamental frequency. For example, if the fundamental frequency is 200 Hz, then the frequency of the second harmonic is 400 Hz and the frequency of the third harmonic is 600 Hz.

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Answer:

All its mass makes a combined gravitational pull on all the mass in your body.

Explanation:

Basically anything with mass has gravity

To determine the relationship between the incident angle θ and the given refractive indices of the media, we can apply Snell's law, which states. Based on the given information, we can conclude that the incident angle θ is greater than the critical angle for the interface between medium 1 and medium2.

n₁ ₓ sin(θ₁) = n₂ ₓ sin(θ₂)

Where:

n₁ is the refractive index of the medium from which the light is coming (in this case, medium 1).

θ₁ is the angle of incidence.

n₂ is the refractive index of the medium the light is entering (in this case, medium 2).

θ₂ is the angle of refraction.

In this scenario, we have n₁ = 1.00 and n₃ = 3.00, but n₂ is not provided. However, we know that no light enters medium 1, which implies that the incident angle θ is greater than the critical angle for the interface between medium 1 and medium 2.

The critical angle (θc) can be determined by setting θ₂ to 90 degrees in Snell's law:

n₁ ₓ sin(θc) = n₂ ₓ sin(90°)

sin(θc) = n2 / n1

Since n₁ = 1.00 and n₂ = 2.00, we have:

sin(θc) = 2.00 / 1.00

sin(θc) = 2.00

However, the sine of an angle cannot be greater than 1, so there is no solution for sin(θc) = 2.00. Therefore, no light can enter medium 1, indicating that the incident angle θ must be greater than the critical angle.

In conclusion, based on the given information, we can conclude that the incident angle θ is greater than the critical angle for the interface between medium 1 and medium2.

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Answer:

a closed system is when everything throughout your system is closed and connected. meaning that electricity can flow though without being interrupted or stopped. And open system is when there is a gap in the line somehwrre and not connected. meaning that electricity cant go though completly becuase there is a spot in the system where it's open and being stopped. (kinda like if you were on a bridge but theres a huge hole in it so you can go to the other side)

There are various contrast between an open and closed system as for an open system interaction of mass as well energy takes place but for a closed system only energy interaction takes place

It can be defined as the specified space under consideration for any thermodynamic process. It can have a fixed boundary as well as a moveable boundary. In a thermodynamic system mainly interaction of mass and energy takes place

There are mainly three types of a thermodynamic system

open system

closed system

isolated system

The characteristics of an open system are as follows

an open system is also known as a control volume system

The simultaneous interaction of mass and energy takes place

There is a variation in the mass of the system with time

Examples of open systems are gas turbines, the human body, and air compressor

The characteristics of a closed system are as follows

An open system is also known as a control mass system

There is no interaction of mass of the system with surroundings will take place only he interaction  of energy takes place

The mass of the system  does not change with time

An example of closed system is a simple closed water bottle without insulations

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Answer:

Explanation:

Friction is a force that opposes the motion or potential motion of two items that come into contact. The word "relative motion" emphasizes that friction resists the motion of the objects with respect to one other, and it emphasizes that friction specifically operates against the motion or potential motion between two objects in contact.

Middle part of the ear have a solid medium. The ossicles, which are bones that amplify sound waves, are located in the middle ear, therefore the medium is solid.

The outer ear is the first place that sound waves pass through, followed by the middle ear and lastly the inner ear. The first medium is gas because the external auditory canal, which is part of the outer ear, is filled with ambient air.  The ossicles, which are bones that amplify sound waves, are located in the middle ear; therefore the second medium is solid. The last medium is liquid because the inner ear is loaded with fluids like endolymph and perilymph that vibrate when sound waves pass through them.

The middle ear amplifies sound after being directed toward it by the outer ear, which is in charge of catching it.  Amplified sound waves are sent from the middle ear to the inner ear, where hair cells detect the sound waves and transmit the data to the brain.

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Answer:

the answer to your question will be D

Explanation:

5 N* 3S =3.25

It would do two possible things: It would push the spacecraft forward and it would also tilt it forward. That then simply means that the spacecraft can rotate and has the possibility to accelerate with the propellers push. The forces here is the push of the propellers. Another factor here is also the torque needed to be able to move the spacecraft.

A propeller mounted on the front of a spacecraft in deep space would not be able to do anything.

What is a propeller?

A propeller is a device with rotating blades that produces thrust by pushing against a fluid such as air or water. Propellers are designed to convert rotational energy into thrust by pushing against a fluid such as air or water. As the propeller blades rotate, they create a pressure difference between the front and back surfaces of the blades, generating a force that propels the device forward.

As there is no medium such as air or water for it to push against  propeller mounted on the front of a spacecraft in deep space would not be able to produce any thrust. In order for a propeller to produce thrust, it needs a fluid medium to push against. This is why propellers are used in air and water, but not in space where there is a vacuum. In space, spacecraft use other propulsion systems such as rockets or ion thrusters to generate thrust.

Therefore, a propeller mounted on the front of a spacecraft in deep space would not be able to produce any thrust.

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Answer: The added heat or thermal energy leads to the molecular bonds breaking which leads to a change of state of solid to a liquid, then eventually gas. Solids melt when they absorb enough thermal energy.

Answer: 3

Explanation: i think

Explanation:

gas vibrate and moves freely at high speeds, liquid vibrate, move about, and slide past each other. solid vibrate (jiggle) but generally do not move from place to place

hope it helps you

The distance above the ground the rock  should be dropped such that it hits the ground at 2t after it is released from rest is 4h.

The height of fall of the rock is calculated by applying the following kinematic equation as shown below.

h = vt + ¹/₂gt²

where;

h = 0 + ¹/₂gt²

h = ¹/₂gt²

2h = gt²

g = 2h / t²

h₁ / t₁² = h₂ / t₂²

The distance above the ground the rock  should be dropped such that it hits the ground at 2t after it is released from rest is calculated as;

h₂ = ( h₁ / t₁² )(t₂²)

h₂ = ( h/t²)(2t)²

h₂ = ( h/t²)(4t²)

h₂ = 4h

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Answer:

Therefore, the work done on the 45.6 kg rock that you lift 0.85 m is approximately 380.75 Joules.

Explanation:

The work done on an object is given by the formula:

work = force x distance x cos(theta)

where force is the applied force on the object, distance is the distance the object is moved, and theta is the angle between the force and the direction of motion. In this case, we can assume that the angle between the force and the direction of motion is zero degrees, since you are lifting the rock straight up.

The force required to lift the rock is equal to its weight, which is given by:

force = mass x gravity

where mass is the mass of the rock and gravity is the acceleration due to gravity, which is approximately 9.81 m/s^2 on the surface of the Earth.

Substituting the given values, we get:

force = 45.6 kg x 9.81 m/s^2 = 447.936 N

Now we can calculate the work done:

work = force x distance x cos(theta) = 447.936 N x 0.85 m x cos(0) = 380.7464 J

Therefore, the work done on the 45.6 kg rock that you lift 0.85 m is approximately 380.75 Joules.

Answer:

Explanation:

The new volume can be found by using the formula for Boyle's law which is

\(P_1V_1 = P_2V_2\)

Since we are finding the new volume

\(V_2 = \frac{P_1V_1}{P_2} \\\)

From the question we have

\(V_2 = \frac{35000 \times 80}{92000} = \frac{2800000}{92000} = \frac{700}{23} \\ = 30.434782...\)

We have the final answer as

Hope this helps you

Answer:

Bananas are curved because they grow towards the sun

Explanation:

Bananas are curved so they can retrieve sunlight. Bananas go through a process called 'negative geotropism'. What it means is that bananas grow away from the ground, instead of growing towards it, hence the 'negative' geotropism.

Answer:

Because they grow towards the sun and the sun is what makes things grow like water to  Beneath each flower petal, a row of tiny banana fruits start to grow. Once they're much bigger in size, the fruit goes through a process called negative geotropism. Which basically means instead of continuously grow towards the ground, they start to turn towards the sun, in order to retrieve light.

Explanation:

Thrust force of the rocket is, T = 2.264 MN

Thus, the force required to move the rocket through the air is 2.264MN. This force is generated because of Newton's third law of motion.

Thrust is the force which moves the rocket through the air, and through space. Thrust is generated by the application of Newton's third law of motion; "For every action there is an equal and opposite re-action. "

The formula for calculating, thrust force of the rocket is T= vdm/dt

Where, T is the thrust of the rocket

v is th relative speed = 8km/s (given in question)

dm/dt is the mass flow rate = 283kg/s (given in question)

Substituting the values,

T = 8km/s × 1000m/1km × 283kg/s

= 2.264 (10^6N=2.264MN)

Therefore, main answer is that

Thrust force is, T = 2.264 MN

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The answers to the momentum questions with given velocity and mass attached as an image are as follows:

Momentum is the tendency of a body to maintain its inertial motion. It is the product of a body's mass and velocity, or the vector sum of the products of its masses and velocities.

Momentum = mass × velocity

According to the questions asked in the attached image, a tractor-trailer truck has a velocity of 35m/s. The momentum at different masses can be calculated as follows:

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Answer:

-0.39 (rounded to the nearest hundredth)

Explanation:

The exact answer is -0.388888889

Answer:

3.7

Explanation:

You are gonna want to start with -5/15 and get -1/3

now we have -1/3 times 2/3

-1/3  x  2/3  -   1/2  x  1/3

              -.17 = -1/2 x  1/3

-.2=-1/3 x 2/3

Answer:

The phases occur because the Sun lights different parts of the Moon as the Moon revolves around the Earth. That means the reason we see different phases of the Moon here on Earth is that we only see the parts of the Moon that are being lit up by the Sun.

Answer:

0

Explanation:

he just don't run you'll get a zero

The speed of the bearing before collision was 5.9 m/s, under the condition that the lump of clay is a uniform cylinder of mass 29.0 kg and radius 19.0 cm .

The speed of the ball bearing before collision can be calculated using conservation of momentum and energy. The initial momentum of the ball bearing is equal to its mass times its velocity, while the final momentum is equal to the sum of the momenta of the ball bearing and clay cylinder after collision.

The initial kinetic energy of the ball bearing is equal to (1/2) times its mass times its velocity squared, while the final kinetic energy is equal to (1/2) times the sum of the masses of the ball bearing and clay cylinder times their common velocity squared.

Using these equations, we can find that the speed of the ball bearing before collision is approximately 5.9 m/s.

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The pressure at position y to be 10.0, which is the air pressure when the piston is at position y.

If the original pressure in the cylinder was 1.0, and the piston is pulled out from position x to position y without changing the temperature of the enclosed air, the air pressure at position y will be increased. This is due to the change in volume of the cylinder as the piston is pulled out. As the volume increases, the number of air molecules inside the cylinder also increases, which causes an increase in the air pressure.

To calculate the air pressure when the piston is at position y, we can use the gas law known as Boyles' Law, which states that the pressure and volume of a gas are inversely proportional. Therefore, if the volume increases, the pressure will decrease, and if the volume decreases, the pressure will increase.

Where P₁ is the initial pressure, V₁ is the initial volume, P₂ is the final pressure, and V₂ is the final volume.

By substituting the given values, we have:

Where V is the change in volume due to the movement of the piston.

Solving for P₂:

As we know, the original pressure is 1.0, and if we multiply it by 10, we will get the final pressure at position y to be 10.0, which is the air pressure when the piston is at position y.

This question is not written in a proper manner. The corrections are:

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Answer:

See below ↓

Explanation:

We know that the energy of a wave is directly proportional to the amplitude of a the wave. That means it directly varies, so when one increases/decreases, the other does the same.

Therefore, when the amplitude of a wave is doubled, the energy of the wave is also doubled.

Similarly, in the case of the frequency of the wave, it is also directly proportional to the energy of the wave.

⇒ E ∝ ν