A skydiver dives from an airplane. air resistance is measured each second following the skydiver’s jump.
Time after jump | Weight | Air Resistance
1 sec | 500 N | 200 N
2 sec | 500 N | 300 N
3 sec | 500 N | 400 N
4 sec | 500 N | 500 N
Which statement best identifies her speed at each second?
a. The skydriver has the slowest speed at 2 seconds
b. The skydriver has the fastest speed at 4 seconds
c. The skydriver has the slowest speed at 1 second
d. The skydriver has the fastest speed at # seconds

Answer:

exothermic

Explanation:

Answer:C car

Explanation:

Answer:

100

Explanation:

cause power equal to work over time

The gravity lock of the Moon to Earth is similar to the action of a giant pendulum.

The gravity lock, also known as tidal locking, occurs when the gravitational forces between two bodies cause one body to always face the other. In the case of the Moon and Earth, the Moon's rotation is synchronized with its orbit around Earth, so the same side of the Moon always faces Earth. This is similar to a giant pendulum, where the force of gravity causes the pendulum to swing back and forth, eventually coming to rest in a stable position.

To know more about gravity,

https://brainly.com/question/31321801

#SPJ11

Answer:

5s

Explanation:

initial distance: 0 m

distance: ? (we don't know)

initial velocity: 0 m/s

velocity: 30 m/s

acceleration: 6 \(m/s^{2}\)

time: ? (we are looking for)

v = v0 + at

plug the numbers in:

30 = 0 + 6(t)

= 30 = 6t

= t = 5

5s

Electron Beam Lithography (EBL) is a technique used in the microfabrication process. In EBL, an electron beam is used to create a pattern or design on a surface. The process involves directing an electron beam onto a surface that is coated with a resist material.

EBL is used for the fabrication of nanostructures and microstructures. It is an essential technique in the field of microelectronics and photonics. It is used to create complex structures that cannot be made using traditional photolithography techniques. The technique is particularly useful in the production of high-resolution images and structures.

In semiconductor industry, EBL is used to create the masks required in photolithography. EBL is a high-resolution process that allows for the creation of masks with feature sizes that are smaller than those possible with conventional photolithography. EBL is also used in the development of new materials and devices.

EBL is not commonly used in semiconductor industry due to its high cost, low throughput, and complexity. The process is slow and requires a lot of time to create patterns. It is also limited in its ability to fabricate large-area structures. Therefore, the technique is more commonly used in research and development applications rather than in industrial production.

To know more about Electron visit:
https://brainly.com/question/12001116

#SPJ11

A fighter jet travelling at Mach 3.2 would take about 1 hour and 1 minute to fly from Los Angeles to New York.

The distance between Los Angeles and New York is 3939.28 kilometers or 2446.91 miles.

A fighter jet travels at Mach 3.2, which is 3.2 times the speed of sound.

The speed of sound is 1,236 km/h or 768 mph.

To calculate the time taken to fly from Los Angeles to New York, divide the distance by the speed of sound, and then divide the result by Mach 3.2.

Distance/speed of sound

= 3939.28/1236 = 3.1822 hours

3.1822/3.2 = 0.9944 hours or

59.67 minutes or 1 hour and 1 minute (rounded up).

Therefore, a fighter jet travelling at Mach 3.2 would take about 1 hour and 1 minute to fly from Los Angeles to New York.

To know more about fighter jet visit:

https://brainly.com/question/4848708

#SPJ11

Answer:

get it done for free on www.brainly.com

Explanation:

Answer:

I will give you $0

Explanation:

I have hardly any money and I don't feel like giving you any.

You can do my work for $0

Thanks! :)

If the organ pipe is cut in half, then the new fundamental frequency is doubled.

Fundamental frequency of a closed organ pipe is 220Hz and the second overtone of this pipe has same wavelength as third harmonic of an open pipe.

The frequency of a fundamental pipe is given as: f = v/4L

L is the length of the pipe

As, L = Lo/2,  Lo is the original length of the pipe and the new frequency would be: f = (v/4)/(Lo/2)

So, f = 2 (v/4Lo)

As v/4Lo = fo,

Hence, f = 2 fo

To know more about fundamental frequency, refer

https://brainly.com/question/1967686

#SPJ4

Explanation:

Wave motion

ex...longitudinal wave.

Answer:

i got 6

Explanation:lmk if i’m wrong

Volume of the balloon occupy in the instant before it bursts is 7.39 litres and can be find out by boyle's law.

Boyle’s law:

This law gives the relationship between initial and final pressure and volumes for an ideal gas.

Initial condition

Let the volume of the balloon is V1=2.00 L

And, the initial pressure is P1=1.75 atm

Final condition

Let the volume of balloon before it bursts is V2

final pressure is P2=360 mmHg

                                =360/760 atm

                                =0.7368 atm
                           (1atm=760mmHg)

Now, according to boyle’s law

P1V1=P2V2

V2=P1V1/P2

V2=1.75*2.00/0.47368 L

V2=1.39L

To know more about Boyle's law here

https://brainly.com/question/15230440

#SPJ4

The electric flux through a circular area of radius 1.43 in the x-y plane can be determined using Gauss's law and the concept of electric field lines.

Gauss's law states that the electric flux through a closed surface is equal to the charge enclosed divided by the permittivity of free space (ε₀). In this case, we have a circular area in the x-y plane, and we want to find the electric flux through it.

To calculate the electric flux, we need to consider the electric field passing through the circular area. Since the area lies in the x-y plane, the electric field is likely perpendicular to the surface and uniform in magnitude.

If we assume the circular area contains a positive charge, the electric field lines would radiate outward from the center of the circle. The electric flux would then be proportional to the number of electric field lines passing through the circular area. The magnitude of the electric flux would depend on the total electric field passing through the area.

To determine the exact value of the electric flux, we would need more information about the charge distribution and the electric field. However, we can conclude that the electric flux through the circular area of radius 1.43 in the x-y plane would be related to the magnitude of the electric field passing through it and the total charge enclosed by the circular area.

Learn more about electric flux here:

https://brainly.com/question/33167286

#SPJ11

Answer:

Apparently, a measuring rod had been used incorrectly and the telescope was not focusing properly - changes were later made to the telescope to correct this problem.

A proton can be placed at rest in a stable force field of a magnetic field. The correct answer is a.

A proton can be placed at rest in a magnetic field, but not in an electric field. This is because a magnetic field exerts a force on charged particles that is perpendicular to the direction of motion, whereas an electric field exerts a force on charged particles that is parallel to the direction of motion.

Since a proton is a positively charged particle, it will experience a force in the opposite direction to the electric field, causing it to accelerate rather than come to a rest. A proton will experience a force perpendicular to the direction of motion in a magnetic field which is opposite to the direction of the field, this will cause the proton to move in a circular path, which can be stable, so proton can be placed at rest in a magnetic field.

To learn more about magnetic field visit: https://brainly.com/question/1691855

#SPJ4

Momentum is a product of the mass and velocity of particles in motion while impulse is the rate of change of the momentum of particles/objects when a force acts on the object.

The impulse of the collision in system A is twice the impulse of the collision in system B

Impulse is given as J = F.dt

In case of impulse 1,

it is F(1-0.5) = 4* 0.5 = 2 Ns

In case of impulse 2,

it is = 2(2.5 - 1.5) = 2Ns

We saw that, both the impulses are calculated to be 2Ns.

Therefore, both the impulses in the graph are same.

To know more about impulse, refer: https://brainly.com/question/17304001

#SPJ4

The initial speed of Car A when Car B is waiting to turn left is 15.9 m/s. After hitting, Cars A and B travel at speeds of 9.1 m/s.

The law of conservation of momentum is defined as the momentum being conserved before and after the collisions. The momentum of the entire system remains constant. Momentum is defined as the product of speed with direction and mass.

From the given,

the collision is inelastic and hence the law of conservation of momentum is, m₁u₁ + m₂u₂ = (m₁+m₂)v

m₁ (mass of Car A) = 2000 kg

m₂(mass of Car B) = 1500 Kg

The initial momentum of Car A(u₁) =?

The initial momentum of Car B(u₂) = 0 (Car B is waiting to take a left turn and hence its velocity decreases and becomes zero)

The final momentum of both cars A and B =9.1 m/s

m₁u₁ + m₂u₂ = (m₁+m₂)v

2000×X + 1500×0 = (2000+1500)×9.1

2000X = 3500×9.1

X = 15.9 m/s

Thus the initial speed of car A is 15.9 m/s or 16 m/s.

To learn more about the Law of conservation of momentum:

https://brainly.com/question/17140635

#SPJ1

Answer:

The correct option is b: A solute depresses the freezing point because the solute disrupts the crystal formation of the solvent.

Explanation:

The depression of the solvent's freezing point is caused by the addition of a solute because the presence of the molecules of the solute interferes in the arrange and close up of the molecules of the solvent to form the crystal of the solid.

The attraction of the solute molecules to the solvent molecules interfere with the formation of the solid, so the solution must be cooled to a lower temperature so it can form the solid.

Hence, the correct option is b: A solute depresses the freezing point because the solute disrupts the crystal formation of the solvent. The other options are incorrect.

I hope it helps you!              

Turn the dial either clockwise to make the unit colder or anticlockwise to make the unit warmer to set the thermostat to any temperature.

A thermostat is a part of a regulating mechanism that senses the temperature of a physical system and takes action to keep it close to a desired setpoint.

Any system or gadget that heats or cools to a setpoint temperature uses a thermostat. Examples include central heating systems for buildings, air conditioners, HVAC systems, water heaters, kitchen appliances like refrigerators and ovens, and incubators for use in science and medicine.

To know more about the thermostat, here

brainly.com/question/22598217

#SPJ4

It is difficult to compare the size of Star S and Star W due to the lack of information about their physical properties and the factors that affect star size.

There are several reasons why it is difficult to compare the size of Star S and Star W. Firstly, the physical properties of these stars are not known, such as their mass, temperature, luminosity, and radius.

Without this information, it is very difficult to accurately determine their size as the size of a star is determined by its mass and other physical properties.

Secondly, there are many factors that affect the size of a star. For example, the age of a star can affect its size - as a star ages, it expands and becomes larger.

The composition of a star can also affect its size, as stars that are made up of different elements will have different physical properties and sizes. Additionally, the distance between the observer and the star can also affect how large the star appears, making it difficult to accurately compare two stars that are at different distances from Earth.

In conclusion, it is difficult to accurately compare the size of Star S and Star W without more information about their physical properties and an understanding of the factors that affect star size.

Learn more about temperature here.

https://brainly.com/questions/7510619

#SPJ11

Answer:

minimize some of the steel and the handrails would be a lot more safer for the children

Explanation:

I would like to minimize the heat transfer from the handrails because when it is decrease, the friction will increase.

Any or all of a number of events, referred to as processes, known as heat transfer, are capable of moving energy + entropy from one place to another. Typically, convection, nonlinear thermal, etc. conduction are used to describe specific methods. It involves the slow, energy- and entropy-transfer-involved process of conduction between adjacent molecules.

A hot fluid, such as air, must move during convective; this process is typically quite quick.

Radiation is indeed the term for the electromagnetic radiation that is used to describe how energy is transferred from its emission at a heated surface to its absorption on that other surface without a medium.

The reason behind minimizing the heat transfer from the handrails is because when the heat transfer is decreased, the friction in the rails will increase, and it will be easy to hold them for support.

To know more about heat transfer:

https://brainly.com/question/13433948

#SPJ2

The change in kinetic energy for this system is - 11.69 J.

The change in the kinetic energy of the system is calculated by applying the following kinematic equation as shown below.

ΔK.E = K.Ef - K.Ei

where;

The initial kinetic energy of the logs and the frogs is calculated as follows;

K.Ei = ¹/₂ (75)(1.8²)  +   8(¹/₂)(0.3)(1.3²)

K.Ei = 123.53 J

The final kinetic energy of the system depends on the final velocity of the system. The final velocity of the system after the collision is calculated as follows;

m₁u₁ + m₂u₂ = v (m₁ + m₂)

(75 x 1.8) + (8 x 0.3)(-1.3)  = v (75  +  8 x 0.3)

135 - 3.12 = 77.4v

131.88 = 77.4v

v = 131.88 / 77.4

v = 1.7 m/s

K.Ef = ¹/₂(m₁ + m₂)v²

K.Ef = ¹/₂(75 + 0.3x8)( 1.7² )

K.Ef = 111.84 J

The change in kinetic energy = 111.84 J - 123.53 J = - 11.69 J

Learn more about change in kinetic energy here: https://brainly.com/question/1932411

#SPJ1

Given parameters:

Initial volume  = 75cm³

New volume  = 30cm³

New pressure  = 110Pa

Unknown:

Initial pressure = ?

Solution:

Condition: temperature is constant

We simply apply Boyle's law to this problem:

   " the volume of a fixed mass(mole) of a gas varies inversely as the pressure changes if the temperature is constant".

  Mathematically;

          P₁ V₁  = P₂ V₂

where P and V are pressure and volume values

          1 and 2 are the initial and final states.

Input the parameters and solve for P₁;

     P₁ x 75  = 110 x 30

   P₁ = 44Pa

The initial pressure is 44Pa

Answer:52.5

Explanation:

You pull a sled with a package on it across a snow-covered flat lawn. If you apply a force of 65.1 N to the sled, it accelerates at 1.24 m/s2. The combined mass of the package and the sled m = 52.50 kg

The given data to find Mass,

The force applied to the sled, F = 65.1 N

Acceleration of the sled, a = 1.24 m/s²

Forces are defined by both strength and direction.

Force is a vector quantity. It is a quantity that is described by Magnitude and Direction. The strength of a force is its magnitude and the direction, well it is the direction the magnitude is applied on the object.

We need to find the combined mass of the package and the sled. Let it is m. Using definition of force as follows :

F = ma

m = F/a

m = 65.1 /1.24

Mass, m = 52.5 Kg.

If you apply a force of 65.1 N to the sled, it accelerates at 1.24 m/s2. The combined mass of the package and the sled m = 52.50 kg

Hence, Option C is the correct answer.

Learn more about Force,

https://brainly.com/question/1222214

#SPJ5

The formula used to calculate the change in thermal energy is Q = mcΔT. Here, Q represents the amount of heat energy transferred.

m is the mass of the substance being heated or cooled, c is the specific heat capacity of the substance, and ΔT is the change in temperature.

This formula is useful in determining the amount of thermal energy required to raise the temperature of a substance or to calculate the amount of energy released when a substance is cooled.

It is also used in understanding the principles of thermodynamics and the behavior of various materials in different thermal environments.

learn more about thermal energy here :brainly.com/question/30819997

#SPJ11

Answer:

43.3 m/s.

Explanation:

Assuming the potential energy is due to the gravitational potential energy, we can use the conservation of energy to find the kinetic energy:

Total energy = Potential energy + Kinetic energy

Kinetic energy = Total energy - Potential energy

Kinetic energy = 300 J - 40 J = 260 J

However, we need to know the mass of the object to convert the kinetic energy to velocity. We can use the potential energy to find the mass:

Potential energy = mgh

40 J = m(9.81 m/s^2)(300 m)

m = 0.137 kg

Now we can use the kinetic energy to find the velocity:

Kinetic energy = (1/2)mv^2

260 J = (1/2)(0.137 kg)v^2

v^2 = (2*260 J) / 0.137 kg

v = 43.3 m/s (rounded to one decimal place)

Therefore, the kinetic energy is 260 J and the velocity of the object when it reaches the ground is 43.3 m/s.

Answer

a) A decrease in the two objects' mass

b) The gravitational force between two objects is inversely proportional to the square of the distance. Therefore, doubling the distance will multiply the gravitational force by 2^2 = 4, giving us a final gravitational force of 1200 x 4 = 4800 N.

c) A change in the distance between them

hope this helps ;)

Answer:

See below

Explanation:

x component =  90 cos 45 = 63.6 N

y component =  90 sin 45  = 63.6 N