Stars begin life as a cloud of gas and dust. The birth of a star begins when a disturbance , such as the shock wave from a supernova, triggers the cloud of gas and dust to collapse inward. Would you expect the temperature at the center of the protostar to increase or decrease with time? Explain your reasoning.

Answer:

-400km/hr

Explanation:

Velocity=displacement/time

=400/1

=400Km/hr

=-400km/hr (because west direction)

Answer:

The coin was at rest until the card was removed, so it tended to remain in the same location. Once the card was gone, the unbalanced force of gravity caused the coin to fall.

I hope this helped!+*♡

Two football players are running towards each other in a straight line (exact opposite directions). Player A is running at 3.3 m/s and has a mass of 105 kg. Player B is 126 kg.

The players collide and their net momentum after the collision is 0 Ns. How fast was Player B running before they collided? The law of conservation of momentum states that in a closed system, the total momentum remains constant. Therefore, the total momentum of both players before collision equals the total momentum of both players after collision. This means: mA * VA + mB * VB = (mA + mB) * V, where VA and VB are the initial velocities of A and B, respectively, and V is their final velocity after the collision (which is 0).

So, we can rearrange the above equation to solve for VB. VB = (mA * VA) / mB Here, mA = 105 kg and VA = 3.3 m/s, and mB = 126 kg. Substituting the values, we get: VB = (105 * 3.3) / 126= 2.75 m/s Therefore, Player B was running at 2.75 m/s before they collided.

To know more about running visit:

https://brainly.com/question/32671047

#SPJ11

The arrow that indicates the direction of centripetal force on the object represented by the dot is the arrow that points towards the center of the circle.

Centripetal force is the force that keeps an object moving in a circular path. It always acts towards the center of the circle, which is why the arrow pointing towards the center of the circle represents the direction of centripetal force. In the diagram below, the object represented by the dot is moving in a circular path, and the arrow pointing towards the center of the circle represents the direction of centripetal force:

```
     ^
     |
<-----O----->
     |
     v
```

In conclusion, the arrow that indicates the direction of centripetal force on the object represented by the dot is the arrow that points towards the center of the circle.

Learn more about centripetal force at:

https://brainly.com/question/14021112

#SPJ11

Answer:

C

Explanation:

The arrow labeled C, pointing towards the middle of the circle

The required force to push the box straight up at a constant speed is zero.

The net force on the box is calculated by applying Newton's second law of motion as follows;

∑F = 0

F - Ff = ma

(at constant speed, acceleration is zero)

\(F- F_f = ma\\\\F - 0 = 0\\\\F = 0\)

Thus, the required force to push the box straight up at a constant speed is zero.

Learn more about net force here: https://brainly.com/question/14408327

The diameter of Venus can be calculated using the angular size at inferior conjunction and its orbital parameters. With an angular size of 55" and a distance of 0.3 AU from Earth, the physical size of Venus can be determined.

The angular size of an object is the angle it subtends at the observer's location. In this case, the maximum angular size of Venus is given as 55" (arcseconds) during inferior conjunction. Inferior conjunction occurs when Venus is positioned between Earth and the Sun, and its distance from Earth is 0.3 AU (astronomical units). Venus is also stated to be 0.7 AU from the Sun.

To calculate the physical size of Venus, we can use the small-angle formula, which relates the angular size, distance, and physical size of an object. The formula is given by:

Angular size (in radians) = Physical size / Distance

Since the angular size is usually measured in arcseconds, it needs to be converted to radians. One radian is equal to 206,265 arcseconds.

Converting the given angular size of 55" to radians:

Angular size (in radians) = 55" / 206,265 ≈ 0.000266 radians

Using the small-angle formula, we can rearrange it to solve for the physical size:

Physical size = Distance × Angular size

Substituting the values, where the distance is 0.3 AU:

Physical size = 0.3 AU × 0.000266 radians ≈ 0.00008 AU

Finally, to convert the physical size from astronomical units to kilometers, we can use the conversion factor of 1 AU = 149.6 million kilometers:

Physical size = 0.00008 AU × 149.6 million kilometers/AU ≈ 12,000 kilometers

Therefore, the diameter (physical size) of Venus is estimated to be approximately 12,000 kilometers.

Learn more about here:

https://brainly.com/question/32968193

#SPJ11

Answer:

By ADDING the forces

Explanation:

The time of flight is obtained as 25.9 seconds

The time of flight is the time taken to move the object that have been projected along the parabolic path. In this case, we have a cannonball that have been fired  from level ground with a velocity of 240.0 m/s at an angle of 32 degrees.

We know that from the question

T = 2usinθ/g

T = time of flight

u = initial velocity

θ = angle of projection

g = acceleration

T = 2 * 240.0 m/s * sin 32 degrees/9.8 m/s^2

T = 25.9 seconds

Learn more about time of flight:https://brainly.com/question/21537210

#SPJ1

J. J. Thomson used a cathode-ray tube to calculate the charge-to-mass ratio of the electron. The deflection of cathode rays towards the positively charged surface and emission of green light at the far end of the tube confirmed that they are negatively charged particles.

In 1897, J.J Thomson performed a cathode ray tube experiment to determine the charge-to-mass ratio of electrons.

Due to high voltage, a beam of particles was allowed to flow from the negatively charged end to the positively charged end of the tube.

One end of the tube was painted with phosphorous. When electrons struck the wall a green spark was observed which confirmed the presence of negatively charged particles i.e. electrons.

To put it simply, cathode rays came from the cathode tube and deflected towards a positively charged plate showing that they are negatively charged particles.

If you need to learn more about cathode rays click here

https://brainly.com/question/25879572

#SPJ4

The battery can drive current through the wire of resistance 16 Ω for about a day, or 24 hours.

We will try and arrive at this answer, by first applying Ohm's Law for getting the current passing and then relating it with the charge passing to arrive at the working time.

We know that current is the rate of flow of charge through a conductor.

So,

I = Q/t

Q = I*t     ---> (1)

From the famous Ohm's Law,

V = I*R

where V,I, and R are voltage, current, and resistance respectively.

Here, for a wire of resistance 16Ω with a 1.2V battery,

Current passing through the wire = 1.2/16

                                                        = 0.075A

Now, we have to modify the information in the question, as the charge is not derived with mA.hr units, but with coulomb units.

1C = 1A/1s

    = 1000 mA * (1/3600)hr  

    = 10/36 mA.hr

So, 1 mA.hr = 3.6C

For the battery with the rating 1800 mA, the charge in coulombs would be = 1800*3.6 = 6480C

Thus, the time in seconds for the battery to drive current:

Time = Q/I

Time(s) = 6480/0.075

            =  86,400s

            = 24hrs

Thus, the battery can drive current through the wire for about a day, or 24hrs.

For more on electricity,

brainly.com/question/12372387

Answer:59.3

Explanation:

The force due to gravity or weight is 582 N. The mass of a student  is 59.39 Kg.

A force is an effect that can alter an object's motion according to physics. An object with mass can change its velocity, or accelerate, as a result of a force. An obvious way to describe force is as a push or a pull. A force is a vector quantity since it has both magnitude and direction.

Force = mass.acceleration

582 = m*9.8

m = 59.39 Kg.

The force due to gravity or weight is 582 N. The mass of a student  is 59.39 Kg.

To learn more about force refer to the link:

brainly.com/question/13191643

#SPJ2

To determine the number of half-lives that have elapsed, we need to compare the ratio of 14C to 14N atoms found in the hip bone fragment.

The ratio of 1 14C atom for every 31 14N atoms suggests that the hip bone fragment contains a smaller amount of 14C compared to the expected ratio found in a living organism. Since 14C undergoes radioactive decay with a half-life of approximately 5730 years, we can calculate the number of half-lives that have elapsed by observing how many times the ratio needs to double to reach the expected ratio.

In this case, if the expected ratio is 1:1, then the observed ratio of 1:31 would require five doublings to reach 1:1. Therefore, approximately five half-lives have elapsed since the death of the organism from which the hip bone fragment originated.

learn more about fragment click here;

brainly.com/question/10596402

#SPJ11

Answer:

The answer is elastic

Explanation:

hope this helps!

Answer: Proteins are large molecules composed of  one or more chains of amino acids.

Answer: We need protein to help the body repair cells and make new ones.

Answer: We should choose which proteins to eat by shifting the balance of carbs and proteins.

Answer: Low protein foods are not proteins such as,dried fruits, peas,beans,and corn.

At a temperature of approximately 396.23 K, the change in entropy for the reaction is equal to the change in entropy for the surroundings.

The temperature at which the change in entropy for the reaction is equal to the change in entropy for the surroundings, you can use the following relation,

ΔStotal = ΔSsystem + ΔSsurroundings

Since ΔSsystem = ΔSsurroundings, the total entropy change (ΔStotal) will be zero. For a spontaneous process, ΔStotal should be greater than or equal to zero. In this case, we have the following relation:

ΔG = ΔH - TΔS = 0

You are given the values of ΔH (ΔH°rxn = -126 kJ) and ΔS (ΔS°rxn = 318 J/K). Convert ΔH°rxn to J to match the units:

ΔH°rxn = -126,000 J

Now, we can use the equation ΔG = ΔH - TΔS = 0:

0 = -126,000 J - T(318 J/K)

Rearrange the equation to solve for the temperature T:

T = -(-126,000 J) / (318 J/K) = 126,000 J / 318 J/K ≈ 396.23 K

So, at a temperature of approximately 396.23 K, the change in entropy for the reaction is equal to the change in entropy for the surroundings.

Learn more about "entropy": https://brainly.com/question/6364271

#SPJ11

Answer:

The ans is Radiation

Mark as brainliest !!

The potential energy of the person mass 95 Kg sitting on top of a slid 3 m high is 2795.85 J

The following data were obtained from the question:

The potential energy of the person can be obtained as follow:

PE = mgh

Inputting the given parameters, we have:

= 95 × 9.81 × 3

= 2795.85 J

Thus, the  potential energy of the person is 2795.85 J

Learn more about potential energy:

https://brainly.com/question/22274239

#SPJ1

Answer:

Burrowing animals can cause weathering. By digging for food or making space to live in the animal may break apart rock. The growing roots of a tree can also break apart rock.

Answer:

15.34 i think

Explanation:

Ball's Vertical travel can be represented as series of decreasing bounces. Ball has traveled a distance of 10 feet when it first touches the floor, 25 feet when it touches the floor second time, 41.25 feet when it touches floor third time. Total distance travelled by ball will be 50 feet

a) After each bounce it's height is decreasing, so it's graph will be series of decreasing lines

b) i) First time it travels 10 feet when it touches the floor

ii) Second time it has travelled 10 + 2(7.5) = 25 feet

iii) Third time it will travel distance of 10 + 2(7.5) + 2(5.625) = 41.25

c) Total distance traveled by the ball can be represented as distance traveled on the first bounce and sum of distance traveled on all bounces

For continuous bounces, we can use the formula of sum of geometric series S = a(1 - r^n) / (1 - r)

S is sum of series, a is initial distance travelled, n is no of bounces

As we know ball bounces till infinity

We can write S = a / (1 - r)

Putting values we get

S = 50 feet

To learn more about geometric series:

https://brainly.com/question/30482947

#SPJ4

Answer:

The atomic number of phosphorus is 15.

Explanation:

It’s found after Si(Silicon) and before S(sulphur)

The electric force between the droplets, and the horizontal acceleration this force produce on the droplets are: 5.84*10^-7 N and 0.32 m/s² respectively

In physics the electric force is the force that attracts or repels two charges (q) separated at a distance called (r), this is expressed in the international system of units in Newton.

To solve this exercise the electric force formulas and the procedures we will use are:

Where:

Given Info:

Applying the electric force formula we have:

F = (k * q1 * q2)/r²

F = [(9 *10^9 N*m²/C² * (2.9*10^-11 C) * (2.9*10^-11 C)]/ (3.6*10^-3 m)²

F = 7.569*10^-12 N*m² /1.296*10^-5 m²

F = 5.84*10^-7 N

Applying the force formula and clearing the acceleration, we get:

a= F/m

a= 5.84*10^-7 N/ 1.8*10^-6 kg

a= 0.32 m/s²

Learn more about electric force at: brainly.com/question/25923373

#SPJ4

Wavelength of argon laser light is 514 nm.

The distance between the central and 1st order principal maxima can be used to find the distance between adjacent grooves on the diffraction grating.

Using this distance and the number of grooves per centimeter, the distance between adjacent grooves can be found.

From this, the wavelength of the laser light can be calculated using the equation d sin θ = mλ, where d is the distance between adjacent grooves, θ is the angle of diffraction, m is the order of the maximum, and λ is the wavelength. Solving for λ gives a value of 514 nm for the wavelength of the argon laser light.

For more such questions on Wavelength, click on:

https://brainly.com/question/10728818

#SPJ11

The action which is best Alex to change her budget to work toward long-term financial goal is Set aside less for discretionary spending and create a budget item for savings. Thus, option second is correct.

A budget is a calculating plan, typically financial but not necessarily, for a specific time frame, typically one year or one month.

The options 3 and 4 are plainly incorrect since they raise expenditures, while Alex needs to reduce costs and boost savings. Option 1 is also inaccurate because fixed expenses are those that are required for a person's life to operate normally, such as food, housing costs, taxes, etc.

Therefore, it is recommended that Alex's discretionary unusual spending, such as leisure costs or pointless purchases, be reduced. Hence, option 2nd is correct.

Learn more about Budget here:

https://brainly.com/question/15683430

#SPJ1

Your question was incomplete, probably the complete question was.....

In a  scalloped hammerhead shark swims at a steady speed of 1.5m/s with its 90cm-cm-wide head perpendicular to the earth's 53 µT magnetic field. The magnitude of the induced emf between the two sides of the shark's head is zero.

To calculate the magnitude of the induced electromotive force (emf) between the two sides of the shark's head, we can use Faraday's law of electromagnetic induction. Faraday's law states that the emf induced in a conductor is equal to the rate of change of magnetic flux through the conductor.

Given:

Speed of the shark: 1.5 m/s

Width of the shark's head: 90 cm = 0.9 m

Earth's magnetic field strength: 53 µT = 53 × 10^(-6) T

First, let's calculate the rate of change of magnetic flux through the shark's head. The magnetic flux (Φ) is given by the formula:

Φ = B * A * cos(theta)

Where:

B is the magnetic field strength

A is the area perpendicular to the magnetic field

theta is the angle between the magnetic field and the normal to the area (in this case, it is 90 degrees since the head is perpendicular to the magnetic field)

A = 0.9 m * 1.5 m/s (since the area is the product of the width and the speed)

A = 1.35 m^2

Now, let's calculate the rate of change of magnetic flux (dΦ/dt) using the speed of the shark:

dΦ/dt = d(B * A * cos(theta))/dt

= B * d(A * cos(theta))/dt

= B * A * d(cos(theta))/dt

The derivative of cos(theta) with respect to time is 0 since the angle is constant.

Therefore, dΦ/dt = 0

Since the rate of change of magnetic flux is zero, the induced emf is also zero.

Hence, the magnitude of the induced emf between the two sides of the shark's head is zero.

To learn more about magnetic field visit: https://brainly.com/question/7645789

#SPJ11

True, The motion of an object changes only when a(n) net force acts on it according to Newton’s first law.

Newton's first law of motion, also known as the law of inertia, states that an object at rest will remain at rest, and an object in motion will remain in motion with a constant velocity, unless acted upon by a net external force.

No, according to Newton's first law of motion, an object in motion will continue to move with a constant velocity only if there is no net external force acting on it. Any change in motion requires the application of a net force.

Learn more about "Newton’s first law." here:

https://brainly.com/question/29775827

#SPJ1

An ideal battery is a source of fixed EMF and voltage. An ideal battery is a theoretical construct that is used to understand how batteries work. It is a model that assumes that a battery has no internal resistance and that its voltage does not change with time.

In this idealized scenario, a battery is a source of fixed electromotive force (EMF) and voltage. The EMF is a measure of the battery's ability to produce electrical energy, while the voltage is the measure of the potential difference between the two terminals of the battery. In an ideal battery, the voltage is constant and does not depend on the amount of current that is drawn from it. This means that an ideal battery can deliver a constant amount of energy over an extended period of time.

While an ideal battery is not a real device, it is a useful tool for understanding the behavior of real batteries. In real batteries, there is always some internal resistance that causes the voltage to drop as current is drawn from the battery. This means that the actual voltage of a battery depends on the amount of current that is being drawn from it. Moreover, the voltage of a real battery decreases over time as the battery discharges. Nevertheless, the concept of an ideal battery is helpful in understanding the principles of battery operation and in designing practical battery systems that can deliver reliable and consistent performance.

To learn more about EMF refer:

https://brainly.com/question/14263861

#SPJ11

The scenario described involves an insulating sphere with a uniform volume charge distribution, carrying a charge q. The electric field passing through each of the three concentric Gaussian surfaces will be constant, and the net flux through each surface will also be the same.

There are three concentric Gaussian surfaces surrounding the sphere.

Gaussian surfaces are hypothetical surfaces used to analyze electric fields and charge distributions.

Considering the concentric Gaussian surfaces, the electric field due to a uniformly charged sphere is proportional to the charge enclosed by each Gaussian surface. In this case, since the charge distribution is uniform, the charge enclosed by each Gaussian surface will be proportional to the volume enclosed by that surface.

Since the sphere carries a uniformly distributed charge, the electric field at any point inside the sphere is zero. This means that the charge enclosed by each Gaussian surface will be the same, and hence, the electric field through each Gaussian surface will also be the same.

Therefore, the electric field passing through each of the concentric Gaussian surfaces will be constant, and the net flux through each surface will also be the same.

In summary, for the scenario described, the electric field passing through each of the three concentric Gaussian surfaces will be constant, and the net flux through each surface will also be the same.

Learn more about Gaussian surfaces

https://brainly.com/question/33224901

#SPJ11

The correct option is (b). When the primary winding of a 220/110-V transformer is connected to a supply of 300 V, the reluctance of the core is smaller than that with the rated voltage supply. The core reluctance is a major component in determining the impedance in a transformer.

When the primary winding of a 220/110-V transformer is connected to a supply of 300 V, the reluctance of the core is smaller than that with the rated voltage supply. The core reluctance is a major component in determining the impedance in a transformer. A transformer is a device that operates on the principle of electromagnetic induction and is used to transfer electrical energy from one circuit to another. A transformer's operation is based on the interaction of two coils of wire, one with a varying current and the other with an induced voltage. The transformer has a primary winding that is connected to the input voltage source and a secondary winding that is connected to the output voltage load. The magnetic flux generated by the primary winding passes through the transformer's core, which is made up of laminations of magnetic material. The core provides a low reluctance path for the magnetic flux, which increases the magnetic flux density and, as a result, the transformer's efficiency.

In a transformer, the primary winding's magnetic flux creates a magnetic field in the core. This magnetic field produces a voltage in the secondary winding. The transformer's impedance is determined by the primary and secondary winding turns ratio and the core reluctance. The transformer's core reluctance is determined by the length of the core's magnetic path, the cross-sectional area of the core, and the magnetic permeability of the core material.The transformer's core reluctance is a major component in determining the impedance in a transformer. The reluctance is inversely proportional to the cross-sectional area of the core and directly proportional to the length of the magnetic path. Therefore, when the primary winding of a 220/110-V transformer is connected to a supply of 300 V, the reluctance of the core is smaller than that with the rated voltage supply.

To know more about transformer visit:

https://brainly.com/question/15200241

#SPJ11

The changes in the center of the pressure of a wing affect the aircraft's stability and control.

The center of pressure (CP) is a spot on a plane wing where the sum total of aerodynamic forces (lift, drag, and inertia) acts on the wing. The lift force of an airplane is generated by its wings, which are located at different points. The CP is the spot on the wing where the total lift force is said to be acting. This point will change as a result of changes in the airspeed, angle of attack, and lift coefficient of the wing.

When there is a change in the center of pressure of a wing, it will affect the stability and control of the aircraft. As the center of pressure shifts backward, the wing produces less lift force, and as the center of pressure shifts forward, the wing produces more lift force. If the center of pressure moves too far back, it may lead to an unstable aircraft, making it difficult to control the aircraft. If the center of pressure moves too far forward, the aircraft will become uncontrollable due to high drag and high lift. Therefore, the aircraft designers must have an in-depth understanding of the aircraft's center of pressure and the importance of the center of pressure for flight stability and control.

To learn more about center of the pressure

https://brainly.com/question/31565985

#SPJ11