A puck slides on a frictionless table hitting a block. in which scenario does the puck exert the most force on the block?

Polar jet streams are formed because of the warm and cold air masses.

Polar front jet stream, also called polar front jet or mid-latitude jet stream stream, a belt of powerful upper level winds that sits at top the polar front.

The winds are strongest in the troposphere, which is the upper boundary of the troposphere, and move in a generally westerly direction in mid-latitudes.

The vertical wind shear which extends below the core of this jet stream is associated with horizontal temperature gradients that extend to the surface. As a consequence, this jet manifests itself as a front that marks the division between colder air over a deep layer and warmer air over a deep layer.

Polar jet streams are formed due to warm and cold air masses.

To learn more about polar jet streams refer to the link.

brainly.com/question/14494381

#SPJ1

Answer:

C

Explanation:

When a weightless spring scale is attached to two equal weights, the reading on the scale will be zero. This is because the weights on both sides are balanced, resulting in no net force acting on the scale.

The reason for this is Newton's third law of motion, which states that for every action, there is an equal and opposite reaction. In this case, when one weight exerts a downward force on the spring scale, the other weight exerts an upward force of the same magnitude on the scale.

These opposing forces cancel each other out, resulting in a net force of zero. As a result, the spring scale does not experience any deformation and the reading remains at zero.

It is important to note that this only applies when the two weights are equal. If the weights were different, there would be an imbalance in the forces, causing the spring scale to register a non-zero reading.

In summary, when a weightless spring scale is attached to two equal weights, the reading on the scale will be zero due to the balanced forces acting on it.

For more question  force

https://brainly.com/question/17927930

#SPJ8

Answer:

35/9 m/s

Explanation:

21 km = 21000 m

90 min = 90*60 s = 5400 s

21000/5400 = 35/9 m/s

If you put 300 J of heat into an engine with an efficiency of 0.35, how much work can be done? 3. How much energy must be put into an engine with an efficiency of 0.6 if 270 J of work are required? 4. An engine with an efficiency of 0.425 uses 1200 J of energy. Find the amount of energy wasted by the engine. 5. Calculate the efficiency of an engine operating between temperatures of 258 K and 600 K 6. An engine runs with its exhaust (cold) reservoir at a temperature of 200 K. To what temperature should the input (hot) temperature be set if an efficiency of 0.8 is desired? 7. Complete the following table of temperatures. Fahrenheit Celsius Kelvin 213 15 98.6 75 408

The answers to this test are:

1. What is the maximum speed when the conditions are mass = 450 kg, initial height = 30 m, and the roller coaster car is initially at rest?

24.2 m/s

2. A computational model predicts the maximum height that a roller coaster car can reach when the lowest height of its journey is at ground level, where it has a speed of 20 m/s. Given these conditions, what is the maximum height?

20.4 m

3. A computational model predicts the speed of a roller coaster car at different heights given its speed at the lowest height of its journey, which is at ground level. The speed at the lowest point is 30 m/s. What is the prediction for its speed when it is at a height of 20 m?

22.5 m/s

4. A computational model predicts the maximum potential energy a roller coaster car can have given its mass and its speed at the lowest point of its journey. Its mass is 350 kg, and it speed at a height of 0 m is 25 m/s. What is the prediction for its maximum potential energy?

109,375 J

5. What is the benefit of using simple computational models in a spreadsheet application, like the one used in this course, to predict mechanical energy and related values?

It is easy to calculate new scenarios.

The predicted speed of roller coaster at the given height is 22.5 m/s. Hence, option (d) is correct.

Given data:

The speed of roller coaster at the lowest point is, v = 30 m/s.

The height of coaster is, h = 20 m.

We need to predict the speed at the given height. So for that purpose, we can use the law of conservation of energy. As per the conservation of energy :

Total energy at height of 20 m = Total energy at bottom

PE + KE = PE' + KE'

Here,

PE and KE are the potential and kinetic energies at respective points.

So,

\(mgh + \dfrac{1}{2}mv'^{2}=0 + \dfrac{1}{2}mv'^{2}\)

At bottom, the potential energy is zero.

Solving as,

\(gh + \dfrac{1}{2}v'^{2}=\dfrac{1}{2}v^{2}\\\\(9.8 \times 20) + \dfrac{1}{2} \times v'^{2}=\dfrac{1}{2} \times 30^{2}\\\\v' = 22.5 \;\rm m/s\)

Thus, we can conclude that the predicted speed of roller coaster at the given height is 22.5 m/s. Hence, option (d) is correct.

Learn more about the conservation of energy here:

https://brainly.com/question/2137260

Answer:

A)250-240

=10+960

=970

Barium have 2 valence electrons.

Neon is a noble gas with 8 valence electrons

Carbon and silicon both have same valence electrons that is 4...

Hope it helps you to not get lost lol

Answer: silicon and carbon

Explanation:

barium has 2 valance electronsNeon has 8 valence electronsSilicon has 4 valence electronsCarbon has 4 valence electrons

The resistance of the resistor is 1.8Ω

Consider the voltage across the inductor 4 sec after the switch is closed is V(4)

The voltage across the inductor 4 sec after the switch is closed is 80%  of its maximum value, i.e., V(4)=0.8\(V_{0}\)

Consider the expression for the voltage across the RL circuit.

V(t)=\(V_{0}e-\frac{t}{T}\)

Where \(V_{0}\) is the maximum voltage, t is the time, V(t) is the voltage at time

t and T is the time constant.

Substitute the values of ,\(V_{0}\), V(t) and t in the above expression.

\($$\begin{aligned}0.8 \mathrm{~V}_0 & =\mathrm{V}_0 \times \mathrm{e}^{-\frac{4}{\tau}} \\0.8 & =\mathrm{e}^{-\frac{4}{\tau}} \\\frac{1}{0.8} & =\mathrm{e}^{\frac{4}{\tau}}\end{aligned}$$\)

Take natural log on both the sides.

\($$\ln \left(\frac{1}{0.8}\right)=\frac{4}{\tau}$$\)

Rearrange the above expression.

\($$\begin{aligned}\tau & =\frac{4}{\ln \left(\frac{1}{0.8}\right)} \\& =17.9 \mathrm{~s}\end{aligned}$$\)

Now consider the expression for time constant.

\($$\tau=\frac{\mathrm{L}}{\mathrm{R}}$$\)

Where R is the inductance and L is the resistance.

Rearrange the above expression.

R = \(\frac{L}{T}\)

Substitute the values of T and L in the above expression.

\(R=\frac{34}{17.9}\\ R=1.8\)Ω.

Therefore, the resistance of resistor is 1.8Ω

For such more questions about Resistor

https://brainly.com/question/17562635

#SPJ4

Let's call the length of the race track as "x".

To solve for "x", we can use the formula:

\(\implies\text{ Time} = \dfrac{\text{ Distance}}{\text{ Speed}}\)

Since the race ends in a tie, we know that Jan and Mary both took the same amount of time to run the race. Let's call this time "t".

\(\implies \text{ Time} = \dfrac{\text{ Distance}}{\text{ Speed}}\)

\(\implies t = \dfrac{x - 25}{7.5}\)

\(\implies\text{ Time} = \dfrac{\text{ Distance}}{\text{ Speed}}\)

\(\implies t = \dfrac{x}{8.0}\)

Since both expressions represent the same time, we can set them equal to each other and solve for "x":

\(\implies \dfrac{x - 25}{7.5} = \dfrac{x}{8.0}\)

Multiplying both sides by 60 (the least common multiple of 7.5 and 8.0) to get rid of the decimals:

\(\implies 8(x - 25) = 7.5x\)

\(\implies 8x - 200 = 7.5x\)

\(\implies 0.5x = 200\)

\(\implies x = 400\)

\(\therefore\) The length of the race track is 400 meters.

\(\blue{\overline{\qquad\qquad\qquad\qquad\qquad\qquad\qquad\qquad\qquad\qquad\qquad\qquad\qquad\qquad\qquad}}\)

Answer:

The force of gravity between two objects is given by the formula:F = G * ((m1 * m2) / r^2)Where F is the force of gravity, m1 and m2 are the masses of the two objects, r is the distance between the centers of mass of the two objects, and G is the gravitational constant.To find the force of Jupiter on Ganymede, we can plug in the values for the mass of Jupiter (m1), the mass of Ganymede (m2), the distance between the two objects (r), and the gravitational constant (G):Fjupiter on ganymede = (6.674 x 10^-11 N * (m^2 / kg^2)) * ((1.9 x 10^27 kg * 1.5 x 10^23 kg) / (1.1 x 10^9 m)^2)Fjupiter on ganymede = 4.14 x 10^17 NTo find the force of Ganymede on Jupiter, we can use the same formula and just swap the values for the mass of Jupiter and the mass of Ganymede:Fganymede on jupiter = (6.674 x 10^-11 N * (m^2 / kg^2)) * ((1.5 x 10^23 kg * 1.9 x 10^27 kg) / (1.1 x 10^9 m)^2)Fganymede on jupiter = 4.14 x 10^17 NBoth of these forces are acting in opposite directions, so we can represent them as vectors by using the notation Fjupiter on ganymede = -Fganymede on jupiter.So the force of Jupiter on Ganymede is 4.14 x 10^17 N, and the force of Ganymede on Jupiter is -4.14 x 10^17 N.

Explanation:

Answer:

C. Distance 90 feet Displacement 0 feet

One mole of an ideal gas at STP (22.4 L), we get approximately 1830 moles of air in the room.

The entropy of the air in the room can be estimated to be approximately 1.1 × 10²⁷, given the assumption made.

Learn more about STP

brainly.com/question/32333740

#SPJ11

The first statement is true; if dim V = p and if S is a linearly dependent subset of V, then S contains more than p vectors.

The second statement is false; if S spans V and if T is a subset of V that contains more vectors than S, then T is linearlyly dependent.

Explanation:

If S is linearly dependent, then there is at least one vector in S that can be written as a linear combination of the remaining vectors. If this is the case, then this vector is redundant, and it can be removed from S. This means that we can repeat the process until we have removed all the redundant vectors from S.So, let us assume that S is a linearly dependent subset of V such that dim V = p, then we have the following:dim (span S) < dim Vp. So S contains more than p vectors.

The  second statement is false; if S spans V and if T is a subset of V that contains more vectors than S, then T is linearly dependent.

Explanation:Let us assume that S spans V and if T is a subset of V that contains more vectors than S, then T must have a vector not in S. We can add this vector to S to get a set that contains all the vectors in T. The resulting set is linearly dependent because it contains more vectors than S, which is known to span V.

Learn more about vector space at https://brainly.com/question/30531953

#SPJ11

The number of customer complaints received each day is a discrete variable. This is because it is a count of a specific number of complaints and cannot be measured as a fraction or percentage. the measures of central tendency, variance, or regression models.

The number of complaints can only take on specific whole numbers, and there is no possibility of a "fractional" or "in-between" value. For example, if a business receives 5 customer complaints in a day, it cannot receive 5.5 or 5.25 complaints - it is simply 5. Therefore, the number of complaints is considered to be a discrete variable. It is important to identify whether a variable is discrete or continuous as it can impact how the data is analyzed and interpreted. Discrete variables are typically analyzed using counts, percentages, or statistical tests such as chi-square tests or Poisson regression, whereas continuous variables are analyzed using measures of central tendency, variance, or regression models.

learn more about tendency here.

https://brainly.com/question/31681323

#SPJ11

In the  tetherball game, struck ball whirls around a pole. The vertical component of the tension balances the weight and the horizontal component of tension provides the centripetal force that points toward the center of the circle.

There are two forces acting on a tether ball as it is rotating in uniform circular motion. The force of tension acts along the rope while the weight acts in downward.

The ball will move in a circular motion due to centripetal force and the tether which keeps the ball linked to the pole pulling to the center. For centripetal force, the tether can be an actual object, like a chain, or it may be a force, like gravity that acts like a tether.

To know more about centripetal force, refer

https://brainly.com/question/898360

#SPJ4

You have already plotted the graph.

Solving unsolved one

#d

One result is anamolous

That's

This is because

1. The three types of crystal structures are cubic, hexagonal, and tetragonal, 2.  A needle may float on clean water due to surface tension, and 3. Two applications of surface tension are Insect locomotion and capillary action.

1. Three types of crystal structures with two examples each are:

Cubic: NaCl (rock salt), diamond

Hexagonal: graphite, quartz

Tetragonal: zircon, tin dioxide

2. A needle may float on clean water due to surface tension. However, when detergent is added to the water, the surface tension is reduced, and the needle sinks due to the increased weight of the needle.

3. Two applications of surface tension are:

Insect locomotion: Insects such as water striders are able to walk on water due to the high surface tension of water. The insects use their weight and hydrophobic legs to create small depressions in the water surface, which increases the surface tension and allows them to stay afloat.

Capillary action: Capillary action is the ability of a liquid to flow in narrow spaces against the force of gravity. This phenomenon is due to the surface tension of the liquid, which causes it to rise in narrow tubes or porous materials. Capillary action is used in many applications, such as in wicking materials for candles, in paper chromatography for separating mixtures, and in plants for transporting water and nutrients from the roots to the leaves.

Therefore, NaCl, diamond, graphite, quartz, zircon, and tin dioxide are a few examples of the three main types of crystal structures: cubic, hexagonal, and tetragonal. Applications where liquids must flow in constrained places against the pull of gravity, such insect locomotion and capillary action, depend on surface tension. Surface tension allows a needle to float on water, but when detergent is added, it lowers surface tension and makes the needle heavier, which makes it sink.

To learn more about  Archimedes' Principle  click:

brainly.com/question/787619

#SPJ1

To calculate the magnetic acceleration of an alpha particle with a mass of 6.6 × 10−27 kg and a charge of 3.2 x 10^-19 C, the magnetic of acceleration that the alpha particle will experience is a = 4.85 x 10^7 * (B)

we need to use the equation for magnetic acceleration, which is given by:

a = (q/m) * (B)

where q is the charge of the particle, m is its mass, and B is the magnetic field strength.

Substituting the given values, we get:

a = (3.2 x 10^-19 C) / (6.6 × 10−27 kg) * (B)

Simplifying, we get:

a = 4.85 x 10^7 * (B)

Therefore, the magnetic acceleration of the alpha particle will depend on the strength of the magnetic field it is subjected to. The greater the strength of the magnetic field, the greater the magnetic acceleration experienced by the particle.

To know more about magnetic acceleration: https://brainly.com/question/460763

#SPJ11

Answer:

D. Registered dietitian

Answer:

D

Explanation:

The answer is Matter contains internal energy, Heat is energy flow due to the change in temperature

Answer:

Yes, the practice of lining waterways with concrete should continue.

Explanation:

From the calculation and the momentum of the body, the velocity is 62 m/s

The term momentum refers to the product of mass and velocity. Now recall that the rate of change of momentum is equal to the impressed force.

Hence;

7440 kg-m/s = 120 kg * v

v= 7440 kg-m/s/120 kg

v =  62 m/s

Learn more about momentum:https://brainly.com/question/24030570

#SPJ1

The normal result of the trade wind blowing from South America to Indonesia and Australia warm water produces rainy weather in Indonesia and Australia. Option D

We know that the trade winds are the winds that tend to originate at the north east or the south eastern parts of the hemisphere and tend to be blowing across the seas towards the equator. Thus we can see that the focus of the trade winds is the equator and they emanate from north or south.

One of the effects of the trade winds is that they make the wind warmer and that would make to the emergence of a warmer weather and this would spread to the other parts of the word as we can see from map studies.

The effects of the trade winds  blowing from South America would tend  to be much more felt around the areas of  Indonesia and Australia and this is very important to weather changes around those areas.

Learn more about trade winds:https://brainly.com/question/13432679

#SPJ1

Answer:

The bulb consumes electrical energy at the rate of 500 Watts

1 Watt = 1 Joule/sec  where the joule is the unit of energy

Electric energy is often expressed in kw-hrs

This means that 1 kilowatt of power is used for 1 hour

1 kw-hr = 1000 joules/sec * 3600 sec = 3.6E6 joules of energy

Answer:

The thermal efficiency, \(\eta _{reheat}\), of the Rankine cycle with reheat is 36.81%

Explanation:

p₁ = 8 MPa = 80 Bars

T₁ = 450°C = 723.15 K

From steam tables, we have;

v₁ = 0.0381970 m³/kg

h₁ = 3273.23 kJ/kg

s₁ = 6.5577 kJ/(kg·K) = s₂

The p₂ = 0.8 MPa

T₂ = Saturation temperature at 0.8 MPa = 170.414°C = 443.564 K

h₂ = 2768.30 kJ/kg

\(T_{2'}\) = 400°C = 673.15 K

\(h_{2'}\) = at 400°C and 0.8 MPa = 3480.6 kJ/kg

p₃ = 10 kPa = 0.1 Bar

T₃ = Saturation temperature at 10 kPa = 45.805 °C = 318.955 K

h₃ = 2583.89 kJ/kg

h₄ = \(h_{3f}\) = 191.812 kJ/kg

The thermal efficiency, \(\eta _{reheat}\), of a Rankine cycle with reheat is given as follows;

\(\eta _{reheat} = \dfrac{\left (h_{1}-h_{2} \right )+\left (h_{2'}-h_{3} \right )-W_{p}}{h_{1}-\left (h_{4}+W_{p} \right )+\left (h_{2'}-h_{2} \right )}\)

Therefore, we have;

\(\eta _{reheat} = \dfrac{(3273.23 -2768.30 ) + (3480.6 -2583.89 ) - 8.04)}{(3273.23 -(191.812 + 8.04) + (3480.6 -2768.30 ) } = 0.3681\)

Which in percentage is 36.81%.

Answer:purple

Explanation:

bc it’s cool

Answer:

3 a is the ans i think so ....

Answer:

2m/s

Explanation:

speed = distance÷time

speed =90÷45=2m/s