The motor is lifting the 6 kg box at a constant velocity. How much work is done on the
box to lift it 2 m? (Assume no resistance from the pulley.)

Explanation:

i expected to use Stefan's law of heat exchange but the value you gave aren't conclusive.

I should say that the temperature of the star should be close to that of the sun because of the similarity in the intensity curves

Explanation:

It's displacement would be negative

displacement is a vector quantity.

'Backwards', we can assume, would be negative.

and forwards, positive. So going backwards would mean a negative displacement.

The answer is 1) The pressure at point D is 80 kPa. 2) The temperature at point D is 800 K. 3) The net work done on the gas over four cycles is zero. 4) The internal energy of the gas at point A is 100 J. 5) The total change in internal energy during four complete cycles is zero.

For more questions on the Carnot cycle, click on:

https://brainly.com/question/25819144

#SPJ8

The altitude is 34.18 m. The second answer is 325 m.

Let's utilize the kinematic equation to determine the magnitude of the acceleration on the deck.

V² = U² + 2•a•S

V is the final speed here.

Initial Velocity = U

a stands for speed.

= displacement

assigning values

56.32 = 02 + 2×a×89.4

a = 17.7275 m/s2

Part - 2

Now that we are aware that the aircraft's acceleration when it departs the deck is 4.18 m/s2 at a 39.8-degree angle

velocity in the x-axis

Vx = Ux plus ax t

Vx = 56.3 + 4.18×Cos39.8°×5.05

Vx = 56.3 + 16.2176

Vx = 72.5176 m/s

speed along the y axis

Uy + ayt = Vy

Vy = 0 + 4.18×Sin39.8°×5.05

Vy = 13.512 m/s

Part - 3

Let's now apply a kinematic equation to determine the jet's altitude.

H = Uyt+ayt2/2

assigning values

Uy = 0

H = 4.18×Sin39.8°×(5.05)2/2

H equals 34.118 meters

Part - 4

applying the same calculation from part 3 once more

Hx = Uxt plus axt2/2

To know more about kinematic equation, check out:

https://brainly.com/question/24458315

#SPJ1

Answer:

The description is outlined throughout the clarification section following, and according to the given word.

Explanation:

Answer:

which on a is the question

In the Roman soldier model for refraction, the first soldier who hits the muddy stream would slow down and turn slightly. Option B is correct.

The Roman soldier model is a simplified model used to explain the behavior of light when it passes from one medium to another. In this model, a group of Roman soldiers is marching across a field towards a muddy stream. The soldiers represent light rays, and the muddy stream represents the boundary between two media with different refractive indices.

When the first soldier hits the muddy stream, they slow down because the speed of light decreases when it passes from a medium with a lower refractive index to a medium with a higher refractive index. Additionally, the soldier turns slightly because the direction of the light ray changes as it passes through the boundary between the two media. This change in direction is called refraction, and it occurs because the speed of light changes when it passes through a medium with a different refractive index.

The amount of refraction that occurs depends on the angle at which the light ray hits the boundary between the two media and the difference in refractive indices between the two media. The Roman soldier model is a useful tool for understanding the basics of refraction, but it has limitations and cannot fully explain all aspects of the phenomenon. Option B is correct.

To know more about the Refraction, here

https://brainly.com/question/16362069

#SPJ1

Sadly, the car crashed into a tree at a speed of 5 ms*'. It took 1.2 s for the car to come to a full stop, then the force exerted on the tree would be  6666.67 N.

There are three equations of motion given by  Newton,

v = u + at

S = ut + 1/2 × a × t²

v² - u² = 2 × a × s

By using the first equation of the motion,

v = u + at

0 = 5 + 1.2a

a = 5 / 1.2

a = 4.167 m / s²

The force exerted on the tree = 1600 × 4.167

                                                  = 6666.67 N

Thus, the force exerted on the tree would be 6666.67 N.

Learn more about equations of motion from here,

brainly.com/question/5955789

#SPJ1

When the scientists draw conclusions the scientist find out whether the hypothesis was supported.

A hypothesis is a theory put up to explain a phenomenon. A hypothesis cannot be called a scientific hypothesis unless it can be tested using the scientific process.

Once your experiment is complete, you collect your measurements and analyze them to see if they support your hypothesis.

Scientists frequently discover that their hypotheses and predictions were not supported by the results of their experiments. In these circumstances, they will discuss the results of their experiment before reevaluating their initial theories and predictions in light of the fresh information. The scientific method is essentially restarted in this way. Even if they discover that their theory was correct, they could still wish to verify it once more using a different approach.

The correct option is (a).

Learn more about hypothesis here:

https://brainly.com/question/606806

#SPJ9

Answer:

Oxygen

Explanation:

The goal of photosynthesis is to convert radiant energy from a light source, which the lamp acts as this form of energy; and thus, turns that into chemical energy that is used for its 'food'. As a result of the green water plant and water present, photosynthesis converts carbon dioxide and water into oxygen, and even glucose! Without photosynthesis making the glucose, it would not be possible for cellular respiration to make ATP (or much less ATP would be produced). Both processes are important to the carbon cycle.

Answer:

the resultant wave is the algebraic sum of all the waves reaching that particular point at a given time.

Explanation:

imagine two or three waves reaching a particular particle x at the same time. The particle will vibrate those waves and give out or transmit a resultant wave which is the algebraic sum of the incoming two waves. If both the waves have the same amplitude and phase, the resultant wave will be amplified. However if the waves have the same amplitude and equal but opposite phase then the resultant wave will be a straight line

It would take approximately 546 days for the decay rate of the sample of this radioactive isotope to fall to 0.58 of its initial rate.

1. The decay rate of a radioactive isotope is proportional to the number of radioactive atoms present in the sample at any given time.

2. The decay rate can be expressed as a function of time using the formula: R(t) = R₀ * \(e^{(-\lambda t\)), where R(t) is the decay rate at time t, R₀ is the initial decay rate, λ is the decay constant, and e is the base of the natural logarithm.

3. The half-life of a radioactive isotope is the time it takes for half of the radioactive atoms in a sample to decay. In this case, the half-life is given as 210 days.

4. Using the half-life, we can find the decay constant (λ) using the formula: λ = ln(2) / T₁/₂, where ln(2) is the natural logarithm of 2 and T₁/₂ is the half-life.

5. Substituting the given half-life into the formula, we have: λ = ln(2) / 210.

6. Now, we need to find the time it takes for the decay rate to fall to 0.58 of its initial rate. Let's call this time "t".

7. Using the formula for the decay rate, we can write: 0.58 * R₀ = R₀ * e^(-λt).

8. Simplifying the equation, we get: 0.58 = \(e^{(-\lambda t\)).

9. Taking the natural logarithm of both sides, we have: ln(0.58) = -λt.

10. Substituting the value of λ from step 5, we get: ln(0.58) = -(ln(2) / 210) * t.

11. Solving for t, we have: t = (ln(0.58) * 210) / ln(2).

12. Evaluating the expression, we find: t ≈ 546.

13. Therefore, it would take approximately 546 days for the decay rate of the sample of this radioactive isotope to fall to 0.58 of its initial rate.

For more such questions on decay rate, click on:

https://brainly.com/question/27542728

#SPJ8

The statements 1,4 and 5 accurately describe the influence of distance on gravitational and electrical forces.

Newton's law of gravity states that each particle having mass in the universe attracts each other particle with a force known as the gravitational force.

Gravitational force is proportional to the product of the masses of the two bodies and inversely proportional to the square of their distance.

Decreasing the distance would increase the gravity of the planet.

The following statements accurately describe the influence of distance on gravitational and electrical forces.

1. The gravitational force has an infinite reach.

4. The gravitational force is inversely proportional to the square of the distance.

5. The electrical force is inversely proportional to the square of the distance.

Hence, options 1,4 and 5 are correct.

To learn more about Newton's law of gravity refer to the link;

brainly.com/question/13428472

#SPJ1

Answer:

S = V t - 1/2 a t^2      a here is negative due to deceleration

S = 4 * 8 - 1/2 * 64 = 0

The object just returns to its original starting point

It started out at 8 m/s which was reduced to 0 m/s after 4 sec

In 4 more seconds it was moving at -8 m/s, just the opposite of where it started

The two molecules that best complete the reactants' side of the equation\(CO_2\) + 2\(H_2O\) are \(O_2\) and CO.

The correct answer would be \(O_2\) and CO.

Based on the partial chemical equation provided, \(CO_2\) + 2\(H_2O\), we need to select two molecules that complete the reactants' side of the equation while also considering the conservation of mass. Let's evaluate the given options:

1. \(NaCl_3\): This compound, sodium trichloride, does not contain carbon (C) or oxygen (O) atoms, which are required to balance the equation. Therefore, \(NaCl_3\) is not a suitable choice.

2. \(HS_4\): This compound, hydrogen tetrasulfide, also does not contain carbon (C) or oxygen (O) atoms necessary to balance the equation. Hence, \(HS_4\) is not the correct choice.

3. \(CH_4\): This molecule, methane, consists of one carbon atom (C) and four hydrogen atoms (H). It contains carbon but lacks oxygen atoms required for balancing the equation. Thus, \(CH_4\) does not complete the reactants' side.

4. \(O_2\): Oxygen gas (diatomic oxygen) is represented by\(O_2\). It contains two oxygen atoms, which helps balance the equation since there are two oxygen atoms on the product side (2\(H_2O\)). \(O_2\) is a valid choice for completing the reactants' side.

Considering the conservation of mass, we still need a molecule that contains carbon. Among the given options, CO is the only molecule that consists of one carbon atom (C) and one oxygen atom (O). By adding CO to the reactants' side, we balance both carbon and oxygen atoms in the equation.

For more such information on: molecules

https://brainly.com/question/475709

#SPJ8

If a bird begins flying straight from the runner to the finish line at v= 17.5 km/hr, the bird would reach the finish line in 10 minutes and 37.71 seconds.

The total displacement covered by any object per unit of time is known as velocity. It depends on the magnitude as well as the direction of the moving object.

As given in the problem A runner is jogging in a straight line at a steady v, 3.5 km/hr. When the runner is L= 3.1 km from the finish line, a bird begins flying straight from the runner to the finish line at v= 17.5 km/hr (5 times as fast as the runner).

The time is taken by the bird to reach the finish line = 3.1 km /17.5 km/hour

                                                                                     =0.177 hours

                                                                                     = 10 minutes 37.71 seconds

Thus, the bird would reach the finish line in 10 minutes and 37.71 seconds.

Learn more about Velocity from here, refer to the link;

brainly.com/question/18084516

#SPJ1

Answer:

The first law states that every planet describes an elliptical path about the sun as a single focus.

The second law states that The line joining the planet to the sun sweeps out equal areas in equal time intervals.

The third law states that The squares of the period of revolution is proportional to the cubes of the mean distance between the planet and the sun

To ensure basic human dignity in relation to safe and healthy living, governments can implement various measures such as accessible healthcare, adequate housing, and sanitation and clean water.

Governments should place a high priority on ensuring that everyone has access to healthcare services, enabling them to receive the essential medical care without suffering financial difficulty. This entails providing access to necessary pharmaceuticals, cheap healthcare, and a strong healthcare system.

All citizens should have access to affordable and good housing, according to governments. Policies may include restrictions on rental costs, programs to expand the supply of affordable housing, and efforts to combat homelessness. Basic hygienic and safety criteria should be met by housing.

Governments must make sure that everyone has access to clean, safe drinking water and adequate sanitary facilities. The spread of diseases and the maintenance of sanitary living circumstances can be aided by investments in sewage systems, water treatment facilities, and public hygiene education.

Learn more on healthy living here https://brainly.com/question/27440736

#SPJ1

Answer:

so initial speed of the rock is 30.32 m/s

correct answer is b. 30.3 m/s

Explanation:

given data

h = 15.0m

v = 25m/s

weight of the rock m = 3.00N  

solution

we use here work-energy theorem that is express as here

work = change in the kinetic energy    ..............................1

so it can be written as

work = force × distance     ...................2

and

KE is express as

K.E = 0.5 × m × v²  

and it can be written as

F × d = 0.5 × m × (vf)² - (vi)²      ......................3

here

m is mass and vi and vf is initial and final velocity

F = mg = m  (-9.8)  , d = 15 m and v{f} = 25 m/s

so put value in equation 3 we get

m  (-9.8) × 15 = 0.5 × m × (25)² - (vi)²

solve it we get

(vi)² =  919

vi = 30.32 m/s

so initial speed of the rock is 30.32 m/s

Answer:

strength

Explanation:

Answer:

Potential energy

Explanation:

Since the boy is holding is, it is not moving. So, it has potential energy. Also, since it is in the air, it has gravitational potential energy.

Answer:

Explanation:

Given that:

\(mass \ m_ 1 = 11.0 \ kg\)

\(mass \ m_2 = 19.0 \ kg\)

\(mass \ of \ the \ pulley\ M = 7.90 \ kg\)

\(Radius \ of \ the \ pulley = 0.200\ m\)

1) Provided that the mass in \(m_2\) is greater than the mass we have in \(m_1\), then likewise the tension we have in \(T_2\) will be greater than the tension in \(T_1\)

Using Newton's second law to mass \(m_1\), we have:

\(m_2g - T_2 = m_2 a \\ \\ T_1 = m_1 g +m_1 a \\ \\ T_1= m_1 (g+a) --- (1)\)

By using the second law, we have:

\(m_2g - T_2 = m_2a \\ \\ T_2 = m_2 (g-a)---(2)\)

For the pulley, let's use the torque equation, so we have:

\(T_2 r -T_1 r = I \alpha \\ \\ T_2r -T_1r = \Big ( \dfrac{Mr^2}{2}\Big) \dfrac{a}{r} \\ \\ T_2 -T_1 = \dfrac{Ma}{2} ---- (3)\)

Altogether, from equation (1)(2) and (3), we have:

\(m_2(g-a) -m_1 (g+a) = \dfrac{Ma}{2} \\ \\ m_2g -m_2a -m_1g-m_1a = \dfrac{Ma}{2} \\ \\ a = \dfrac{(m_2 -m_1) g}{(m_1 + m_2 + \dfrac{M}{2})} \\ \\ a = \dfrac{(19.0 \ kg - 11.0 \ kg ) ( 9.8 \ m/s^2)}{(19.0 \ kg + 11.0 \ kg + \dfrac{7.90 \ kg }{2} )}\)

\(a = 2.31 \ m/s^2\)

Also; from equation (1), the tension in the string is:

\(T_1\) = (11.0 kg ) ( 9.8 + 2.31) m/s²

\(T_1\) = 133.21 N

\(T_1\) ≅ 133 N

From equation (2):

\(T_1\) = m_2(g-a)

\(T_1\) = (19.0 kg) ( 9.8 - 2.31) m/s²

\(T_1\) = 142.31 N

\(T_1\)  = 142 N

The depth of the ocean is 3750 m

Echoing  is a method of measuring the depth of the ocean by sending sound waves down to the ocean floor and measuring the time it takes for the sound waves to bounce back. The depth is calculated by multiplying the time taken by the speed of sound in water.

Given that;

V = 2x/t

x = distance

Then we have that

Vt = 2x

x = Vt/2

x = 1500 * 5/2

= 3750 m

Learn more about sound: https://brainly.com/question/29707602

#SPJ1

Missing parts;

A sound is sent out from the sheep and it's reflection from the floor of the ocean return 5 s over second later . Assuming that the velocity of sound in water is 1500metre per second .how deep is the ocean?​

Answer:

The term “cold-blooded” implies that these animals are in a never-ending struggle to stay warm. That really isn't correct. A cold-blooded animal can warm up their blood by being in the sun for hours.

Answer:

3kg

Explanation:

3kg is the appropriate mass

Answer:

3kg

Explanation:

just took the test

The concept of this question can be well understood by listing out the parameters given.

The purpose is to determine the spring constant.

Let us assume that the two blocks are Block A and Block B.

At point A on block A, the initial velocity on the block is zero

i.e. u = 0

We want to determine the time it requires for Block A to reach the table. The can be achieved by using the second equation of motion which can be expressed by using the formula.

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

From the above formula,

The distance (S) = 30 cm; we need to convert the unit to meter (m).

The acceleration (g) due to gravity = 9.8 m/s²

∴

inputting the values into the equation above, we have;

\(\mathsf{0.3 = (0)t + \dfrac{1}{2}*(9.80)*(t^2)}\)

\(\mathsf{0.3 = \dfrac{1}{2}*(9.80)*(t^2)}\)

\(\mathsf{0.3 =4.9*(t^2)}\)

By dividing both sides by 4.9, we have:

\(\mathsf{t^2 = \dfrac{0.3}{4.9}}\)

\(\mathsf{t^2 = 0.0612}\)

\(\mathsf{t = \sqrt{0.0612}}\)

\(\mathbf{t =0.247 \ seconds}\)

However, block B comes to an instantaneous rest on point C. This is achieved by the dropping of the block on the spring. During this process, the spring is compressed and it bounces back to oscillate in that manner. The required time needed to get to this point C is half the period, this will eventually lead to the bouncing back of the block with another half of the period, thereby completing a movement of one period.

By applying the equation of the time period of a simple harmonic motion.

\(\mathbf{T = 2 \pi \sqrt{\dfrac{m}{k}}}\)

where the relation between time (t) and period (T) is:

\(\mathsf{t = \dfrac{T}{2}}\)

T = 2t

T = 2(0.247)

T = 0.494 seconds

\(\mathbf{T = 2 \pi \sqrt{\dfrac{m}{k}}}\)

By making the spring constant (k) the subject of the formula:

\(\mathbf{\dfrac{T}{2 \pi } = \sqrt{ \dfrac{m}{k}}}\)

\(\Big(\dfrac{T}{2 \pi }\Big)^2 = { \dfrac{m}{k}\)

\(\dfrac{T^2}{(2 \pi)^2 }= { \dfrac{m}{k}\)

\(\mathsf{ T^2 *k = 2 \pi^2*m} \\ \\ \mathsf{ k = \dfrac{2 \pi^2*m}{T^2}}\)

\(\mathsf{ k =\Big( \dfrac{(2 \pi)^2*(51 \times 10^{-3})}{(0.494)^2} \Big) N/m}\)

\(\mathbf{ k =8.25 \ N/m}\)

Therefore, we can conclude that the spring constant between the two 51 g blocks held at a distance 30 cm above a table as a result of instantaneous rest caused by the compression of the spring is 8.25 N/m.

Learn more about simple harmonic motion here:

https://brainly.com/question/17315536?referrer=searchResults

The distance you will travel during this inattentive period is 0.083 Km

We'll begin by listing out the given parameters from the question. This is given below:

We know that speed is defined as:

Speed = distance / time

Cross multiply

Distance = speed × time

With the above formula, the distance travelled can be obtained as follow:

Distance = speed × time

Distance travelled = 100 × 0.00083

Distance travelled = 0.083 Km

Thus, from the above calculation, we conclude that the distance travelled is 0.083 Km

Learn more about distance travelled:

https://brainly.com/question/26156790

#SPJ1

The equation  for a machine’s efficiency is = (output energy ÷ input energy) × 100%

Efficiency is the ability to achieve something or get a desired outcome without wasting resources, time, money, energy, or effort. In a broader sense, it is the capacity to carry out tasks effectively and efficiently.

It denotes the degree of performance that requires the fewest inputs to provide the greatest amount of output in more mathematical or scientific words.

Hence, mathematically, machine’s efficiency can be expressed as:

machine’s efficiency =  (output energy ÷ input energy) × 100%

Learn more about efficiency here:

https://brainly.com/question/13828557

#SPJ1

Given:

The mass of the substance is m = 100 g

The temperature change is

The heat provided to the substance is Q = 963 cal

To find the heat required by the same substance to raise the temperature of the substance by 90 degrees Celsius of mass m' = 300 g

Explanation:

First we need to find the specific heat of the substance by the formula

Substituting the values, the specific heat of the substance will be

The heat required by the same substance of mass m' to raise the temperature by 90 degrees Celsius will be

Final Answer: The heat required by the substance of mass 300 g to raise the temperature by 90 degrees Celsius is 2889 calories.

To find the distance traveled, we just have to add all the side lengths of the square, in other words, the perimeter.