Explain how to identify a starting position on a line.

Answer:

Explanation: y’all taking the same test as me hahahahah I got the answers but I can’t attach the picture here so hit me up on snap daniela_0789

The total energy at each point in the path of the skier is constant as the

skier travels down the slope.

Reasons:

1) Given that the total mechanical energy, M.E. is constant, we have;

M.E. = Kinetic Energy, K.E. + Potential Energy, P.E. = Constant

M.E. = K.E. + P.E.

At the start, we have;

P.E. = 25,000 J

K.E. = 0 J

Therefore;

M.E. = 25,000 J + 0 J = 25,000 J

At point 1A, we have, K.E = 10,000 J

P.E. = M.E. - K.E.

Therefore;

P.E. = 25,000 - 10,000 = 15,000

The potential energy at point 1A, P.E. = 15,000 J

At point 1B, we have; PE = 6000 J

K.E. = M.E. - P.E.

Therefore;

K.E. = 25,000 J - 6,000 J = 19,000 J

At 1B, K.E. = 19,000 J

At point 1C, we have; K.E. = 25,000 J

Therefore;

P.E. = 25,000 J - 25,000 J = 0 J

At 1C P.E. = 0 J

2) The Law of Conservation of Energy states that the energy in a closed

system is constant.

The energy transformation follows the Law of Conservation of energy

given that the total mechanical energy is constant at all points along the

path.

3) The energy of a system is not conserved when a external force is

applied.

If the skier experiences friction, the force of friction does work to reduce

the speed of the skier, thereby reducing the kinetic energy at a point

downslope, where the potential energy has already been reduced,

resulting in an reduction in the mechanical energy of the system.

Therefore, if the skier experiences friction, the total energy of the system is

not conserved, as energy will be consumed in the work done by friction

which is converted to heat and sound energies.

Learn more about the Law of Conservation of Energy here:

https://brainly.com/question/2950237

Mass is always the same. The magnitude of weight on the surface of Jupiter is 2605.3 N

Weight can simply be defined as a gravitational pull on an object in space. It is the product of mass and acceleration due to gravity.

Given that;

g = 9.8 m/s^2 on Earth's surface

g = 26.0 m/s^2 on Jupiter's surface

mass of the Earth is 6 x 1024 kg

mass of Jupiter is 1.9 x 1027 kg

radius of Earth is 6.4 x 106 m

radius of Jupiter is 7 x 107 m

If you weigh 982 N on Earth, your mass can be calculated by using weight formula. That is,

W = mg

982 = 9.8m

m = 982/9.8

m = 100.2 Kg

The mass is always constant. Your weight on the surface of Jupiter can be calculated in the same way where g = 26.0 m/s^2 on Jupiter's surface

W = mg

W = 100.2 × 26

W = 2605.3 N

Therefore, your weight will be 2605.3 N on the surface of Jupiter.

Learn more about Weight here: https://brainly.com/question/229459

#SPJ1

The resistance indicated by the platinum thermometer at 200°C is 1.648 times the reference resistance Ro at 0°C.

For more questions on thermometer

https://brainly.com/question/29503787

#SPJ8

Answer:

its the top 3 can confirm on plato

Explanation:

Answer:

plato

Explanation:

Answer:

The value is  \(\rho_s = 4.026 *10^{-6} \ C/m^2\)

Explanation:

From the question we are told that

   The radius of the inner conductor  is  \(r_1 = 1 \ mm = 0.001 \ m\)

    The radius of the outer conductor is  \(r_2 = 3 \ mm = 0.003 \ m\)

    The potential at the outer conductor is  \(V = 1.5 kV = 1.5 *10^{3} \ V\)

Generally the capacitance per length of the capacitor like set up of the two conductors is

      \(C= \frac{2 * \pi * \epsilon_o }{ ln [\frac{r_2}{r_1} ]}\)

Here \(\epsilon_o\) is the permitivity of free space with value  \(\epsilon_o = 8.85*10^{-12} C/(V \cdot m)\)

=>   \(C= \frac{2 * 3.142 * 8.85*10^{-12} }{ ln [\frac{0.003}{0.001} ]}\)

=>   \(C= 50.6 *10^{-12} \ F/m\)

Generally given that the potential  of the outer conductor with respect to the inner conductor is positive it then mean that the outer conductor is positively charge

Generally the line  charge density of the outer  conductor is mathematically represented as

      \(\rho_l = C * V\)

=>   \(\rho_d = 50.6*10^{-12} * 1.5*10^{3}\)

=>   \(\rho_d = 7.59*10^{-8} \ C/m\)

Generally the surface charge density is mathematically represented as

        \(\rho_s = \frac{\rho_l }{2 \pi * r_2 }\)    here \(2 \pi r = (circumference \ of \ outer \ conductor )\)

=>    \(\rho_s = \frac{7.59 *10^{-8} }{2* 3.142 * 0.003 }\)

=>    \(\rho_s = 4.026 *10^{-6} \ C/m^2\)

Answer:

2.94 s

Explanation:

v = u + at

where:

v = final velocity = 9 m/s

u = initial velocity = 0 m/s (rest)

a = acceleration

t = time taken to reach final velocity

We can rearrange the equation to solve for time:

t = (v - u) / a

Substituting the given values, we get:

t = (9 m/s - 0 m/s) / a

Now, we need to find the acceleration. We can use another kinematic equation:

s = ut + (1/2)at^2

where:

s = displacement = 1500 m

u = initial velocity = 0 m/s

a = acceleration

t = time taken to cover the displacement

We can rearrange the equation to solve for acceleration:

a = 2(s - ut) / t^2

Substituting the given values, we get:

a = 2(1500 m - 0 m) / (1500 m / 9 m/s)^2

Simplifying, we get:

a = 3.06 m/s^2

Now, we can substitute this value of acceleration in the earlier equation to find the time taken:

t = (9 m/s - 0 m/s) / 3.06 m/s^2

Simplifying, we get:

t = 2.94 s

The velocity, measured in the Earth reference frame, of an inertial reference frame in which the cat's kinetic energy does not change is equal to the velocity of the skier before the collision. The velocity of the skier before the collision is 15 m/s.

According to the law of conservation of momentum, the total momentum before the collision must be equal to the total momentum after the collision. This can be expressed as m1*v1 + m2*v2 = (m1 + m2)*vf, where m1 and m2 are the masses of the skier and the cat respectively, v1 is the velocity of the skier, and vf is the velocity of the skier and the cat after the collision.

The kinetic energy converted to internal energy in the Earth reference frame can be determined by applying the law of conservation of momentum.

The amount of kinetic energy converted to internal energy can be calculated as follows:

m1*v1 = (m1 + m2)*vf

vf = (m1*v1)/(m1 + m2)

KE = (1/2)*m2*v2²

KE converted = KE initial - KE final

KE converted = (1/2)*m2*v2² - (1/2)*m2*((m1*v1)/(m1 + m2))²

KE converted = (1/2)*m2*v2² - (1/2)*m2*((60*15)/(60 + 5))²

KE converted = (1/2)*5*3.8² - (1/2)*5*(15²/65)

KE converted = 28.8 - 22.15

KE converted = 6.65 J

The velocity, measured in the Earth reference frame, of an inertial reference frame in which the cat's kinetic energy does not change is equal to the velocity of the skier before the collision.

For more questions related to kinetic energy

https://brainly.com/question/8101588

#SPJ1

Answer:

d. R

Explanation:

There are 4 main types of blood – A, B, AB and O.

Blood is the most important component of our life. It is a fluid connective tissue which consists of plasma, blood cells and platelets. It circulates throughout the body and delivers oxygen. Among the given options R is not a blood type. The correct option is D.

It was Karl Landsteiner who discovered the ABO blood group system. There are 4 main blood groups,  they are A, B, AB and O. Your blood group is determined by the genes you inherit from your parents. Each blood group may be either RhD positive or RhD negative.

Blood group A has antigens on the red blood cells with anti-B antibodies in the plasma. Blood group B has B antigens with anti-A antibodies in the plasma. The blood group O has no antigens but both antibodies are present whereas AB has no antibodies.

Group O is the universal donor and AB is universal recepient.

Thus the correct option is D.

To know more about Blood group, visit;

https://brainly.com/question/29067356

#SPJ2

Answer:

is there any choice? in this question?

Hi there!

A)
Since the ball's velocity is initially only in the HORIZONTAL direction, there is NO vertical component of its velocity. Therefore, we can treat this like a free-fall scenario. (Dropped from rest).

We can rearrange the following kinematic equation to make solving for the time taken for the balls to hit the ground easier.

\(d_y = v_yt + \frac{1}{2}at^2\)

dy = vertical displacement (height of table, 0.85 m)

vy = initial vertical velocity (0 m/s, only horizontal)
a = acceleration (due to gravity in this situation, 9.8 m/s²)

t = time (? sec)
Simplify and rearrange the variables for 't'.

\(d_y = 0(t) + \frac{1}{2}at^2\\\\d_y = \frac{1}{2}at^2\\\\t^2 = \frac{2d_y}{a}\\\\t = \sqrt{\frac{2d_y}{a}}}\)

Plug in the given values.

\(t = \sqrt{\frac{2(0.85)}{9.8}} = \boxed{0.4165 s}\)

B)

Now, remember that the ball's acceleration in the vertical direction due to gravity does NOT impact its horizontal velocity. Its vertical and horizontal velocities are COMPLETELY independent. Thus, we can simply use the time solved for above and each ball's respective velocities in the following kinematic equation:
\(d_x = v_xt\)

dₓ= horizontal displacement (? m)

vₓ = horizontal component of velocity (3.5 and 5.3 m/s for A and B respectively)

t = time (0.4165 s)

Solve for the distance traveled by each ball:
Ball A:
\(d_x = 3.5 * 0.4165 = \boxed{1.458 m}\)

Ball B:
\(d_x = 5.3* 0.4165 = \boxed{2.207 m}\)

Answer: ok

Explanation: “In primary succession, newly exposed or newly formed rock is colonized by living things for the first time. In secondary succession, an area that was previously occupied by living things is disturbed, then re-colonized following the disturbance.”-Khanacademy

I think basically, it is saying that you need primary succession in order to colonize and then you have secondary succession which re-colonizeses the area. It could be like a natural disaster, but secondary succession will rebuild back the ecosystem and may even bring good alterations in some scenarios.

I just took the test.

I put True.

I got it right.

The approximate heat transfer through 1.65 cm of air with a temperature difference of 23.0 °C is approximately 24.4 J/s.

To approximate the heat transfer through the air layer in the double-paned window, we can assume that the glass layers have a negligible impact on the heat flow. The heat transfer can be calculated using Fourier's Law of Heat Conduction, which states that the heat flow (Q) is proportional to the temperature difference (ΔT) and inversely proportional to the thickness (L) and thermal conductivity (k) of the material.

First, we need to calculate the effective thermal conductivity of the air layer due to its thickness and the thermal conductivity ratio between air and glass. Let's denote the thermal conductivity of air as k_air and the thermal conductivity of glass as k_glass. Since glass has a thermal conductivity roughly 36 times greater than air, we have k_glass = 36 * k_air.

Next, we calculate the effective thermal conductivity of the air layer as:

k_eff = (k_air * L_air) / (L_air + k_glass)

Substituting the given values, we have:

k_eff = (k_air * 0.0165 m) / (0.0165 m + 0.005 m) = 0.01309 * k_air

Now, we can calculate the heat flow per second through the air layer using the formula:

Q = (k_eff * A * ΔT) / L_air

Substituting the given values, we get:

Q = (0.01309 * k_air * 0.760 m^2 * 23.0 K) / 0.0165 m = 24.4 J/s

Therefore, the approximate heat transfer through 1.65 cm of air with a temperature difference of 23.0 °C is approximately 24.4 J/s.

For more questions on temperature, click on:

https://brainly.com/question/27944554

#SPJ8

Answer: while electric fields aren’t visible or tangible, they are mensurable.

Explanation: you might want to attach the experiment notes to your question***

Answer: 13 miles.

Explanation:

Answer:

Explanation: We need to find the resultant vector S that is the sum of the two vectors:

Next step is fairly easy, we just need to solve simultaneous equations, which will give us components of C D vectors, then finding the direction of vector sum would be the last step

Similarly for D same thing as above is done, as shown next:

Now the direction simply is:

Answer:

\(F_g=461lb_f\)

Explanation:

First calculate the mass of the asteroid. To do so, you need to find the volume and know the density of iron.

If r = d/2 = 645ft, then:

\(V = \frac{4}{3} \pi r^3\)

\(V = \frac{4}{3} \pi r^3\\V = 1.124\times10^{9}ft^3\delta_{iron}=m/V=491lb/ft^3m=V\times\delta=5.519\times10^{11}lb\)

In order to find force, use Newton's universal law of gravitation:

\(F_g=G\frac{m_1m_2}{d^2}\)

Where,

G= the gravitational constant:

\(G= 1.068846 \times10^{-9} ft^3 lb^{-1} s^{-2}\)

\(F_g=461lb_f\)

The maximum angle that the magazine rack can be tilted without falling over depends on its centre of gravity, base width, and the surface it is resting on.

To determine the maximum angle, you can use the formula:

tan(angle) = (centre of gravity height) / (base width/2)

Plugging in the values given, we get:

tan(angle) = 16cm / (5cm/2) = 16cm / 2.5cm = 6.4

The inverse tangent function (tan^-1) can be used to find the angle in degrees:

angle = tan^-1(6.4) = 72.9 degrees

So the maximum angle that the magazine rack can be tilted without falling over is about 73 degrees.

Learn more about Center of Gravity here: https://brainly.com/question/20662235

The magnitude of magnitude force on the proton is 2.4 x 10⁻¹² N.

The magnitude of magnitude force on the proton is calculated as follows;

F = qvB sinθ

where;

Substitute the given parameters and solve for the magnetic force.

F = (1.6 x 10⁻¹⁹) x (3 x 10⁶) x (5) X(sin90)

F = 2.4 x 10⁻¹² N

Thus, the magnitude of magnitude force on the proton is 2.4 x 10⁻¹² N.

Learn more about magnetic force here: https://brainly.com/question/13277365

The diagram that shows the greatest magnitude net torque with a zero net force is the diagram in second option.

option B is the correct answer.

The net torque is the sum of the individual torques. The torque itself is obtained from the product of applied force and the perpendicular distance of the force.

In rotational equilibrium, there is no net torque on the object. There may be individual torques, but they add up to zero and cancel each other out.

Mathematically, the formula for torque is given as;

τ = Fr

where;

The torque applied to an object increases with increase in the perpendicular distance.

To obtain a zero net force, sum of all the opposite forces applied to an object must be equal to zero.

The forces must be equal in magnitude but opposite in direction, and the diagram that meets this specification is the last graph.

Learn more about net torque here: https://brainly.com/question/15262027

#SPJ1

When\(P = 0, Q\)must be in the range between \(4.3 kN and 12.9 kN\) to prevent either cable from becoming slack.

We may examine the forces operating on the beam to find the range of values for Q. The sum of the vertical forces must be zero when \(P = 0,\)which indicates that the beam is in equilibrium. Our result is the equation:

\(Q + 7.5 - 3 - 4 = 0\)

When Q is solved for, we obtain \(Q = 0.5 kN to 12.9 kN.\) To prevent either wire from going slack, we must also ensure that both cables are under positive stress. We can accomplish this by searching for the extreme values of Q in each cable's tensions.

\(Q = 0.5 kN\)results in a positive 7.5 kN tension in cable AB. However, cable DE's tension is negative\((-2.5 kN)\), indicating that cable DE is under tension. is loose.

\(Q = 12.9 kN\) results in a positive \(3.4 kN\) tension in cable DE. Cable AB, however, has negative tension \((-5.4 kN),\) indicating that it is slack.

The range of Q values that satisfy the requirement that neither cable sags when \(P = 0 is 4.3 kN to 12.9 kN.\)

learn more about cables here:

https://brainly.com/question/14300574

#SPJ4

Answer:

Explanation:

I frequency = 278 Hz

An electric iron is marked 120 volts and 500 Watts. The units consumed by it in using it for 24 hours can be calculated using the formula:Power (in watts) = Voltage (in volts) x Current (in amperes)P = V x I

For such more question on Voltage

https://brainly.com/question/14883923

#SPJ8

Answer: So, the time it takes for the speed of the car to change from 0 m/s to 28 m/s at its maximum acceleration, is 1.4 seconds.

It is an exercise in rectilinear uniformly varied motion (MRUV).

As it is asking us to calculate the time, we apply the following formula:

t = (Vf - Vo)/a

Where

It tells us that the car has a maximum acceleration of 20 m/s^2, with speeds from 0 m/s to 28 m/s.

Since the car starts from rest, it has an initial velocity of zero.

We clear the formula t = (Vf - Vo)/t , of the initial velocity and we are left:

Where

We substitute and solve:

t = (28 m/s)/(20 m/s²)

t = 1.4 seseconds

So, the time it takes for the speed of the car to change from 0 m/s to 28 m/s at its maximum acceleration, is 1.4 seconds.

The observation that electromagnetic radiation with energy above a certain value can eject electrons out of a metal is a piece of evidence that they have particle-like properties.

The observation that electromagnetic radiation with energy above a certain value can eject electrons out of a metal is a piece of evidence that they have particle-like properties.

This observation that electromagnetic radiation behaves like particles is known as the photoelectric effect.

It provides evidence that electromagnetic radiation exhibits particle-like properties. When EMR with sufficient energy (above a certain threshold) interacts with a metal surface, it can cause the ejection of electrons from the metal.

This behavior indicates that EMR behaves as discrete packets of energy called photons, which transfer their energy to the electrons and cause their release. The photoelectric effect supports the particle nature of EMR and is a fundamental concept in the field of quantum mechanics.

More on electromagnetic radiation can be found here: https://brainly.com/question/29646884

#SPJ1

The magnetic field is oriented in the xy plane at an angle of 75 degrees from the +x axis, the angle between the magnetic field and the normal to the loop is 75 degrees, so the net torque on the loop is 0.203 Nm.

The net torque on a current-carrying loop in a magnetic field is given by the equation: Torque = (B × I × A × sin(theta))

where torque is the net torque on the loop, B is the magnitude of the magnetic field, I is the current in the wire, A is the area of the loop, and theta is the angle between the magnetic field and the normal to the loop.

In this case, the radius of the loop is 15 cm = 0.15 m, so the area of the loop is A = pi × r² = pi × (0.15 m)² = 0.07 m²

The current in the wire is 2.7 amps, and the magnitude of the magnetic field is 0.12 Tesla.

If the magnetic field is oriented parallel to the +x axis, the angle between the magnetic field and the normal to the loop is 0 degrees, so the net torque on the loop is: Torque = (0.12 Tesla × 2.7 amps × 0.07 m² × sin(0)) = 0 Nm

If the magnetic field is oriented to the +z axis, the angle between the magnetic field and the normal to the loop is 90 degrees, so the net torque on the loop is: Torque = (0.12 Tesla × 2.7 amps × 0.07 m² × sin(90)) = 0.252 Nm

If the magnetic field is oriented in the xy plane at an angle of 75 degrees from the +x axis, the angle between the magnetic field and the normal to the loop is 75 degrees, so the net torque on the loop is: Torque = (0.12 Tesla × 2.7 amps × 0.07 m² × sin(75)) = 0.203 Nm

Learn more about the torque at

https://brainly.com/question/18850713?referrer=searchResults

#SPJ4

The final temperature of the gas is 782 Kelvin, or 509 degrees Celsius.

According to the ideal gas law, the pressure, volume, and temperature of an ideal gas are related by the equation:

PV = nRT

where;

If the initial kinetic energy of the molecules in an ideal gas at 20 degrees Celsius doubles, this means that the average kinetic energy of the gas molecules has doubled.

According to the kinetic theory of gases, the average kinetic energy of a gas is proportional to its temperature. Therefore, if the initial kinetic energy doubles, the temperature must also double.

We can express this mathematically using the equation for the average kinetic energy of a gas molecule:

KE = (3/2) kT

where;

If the initial kinetic energy doubles, we can write:

2KE = (3/2) kT'

where;

Solving for T', we get:

T' = (4/3) (2KE/k)

Substituting the initial temperature of 20 degrees Celsius (293 K) for T and simplifying, we get:

T' = (4/3) (2)(3/2)(293 K) = 782 K

Learn more about kinetic energy of gas here: https://brainly.com/question/11067389

#SPJ1

The size of the angle θ of a point object moving from point A to point B along a circular path is 2πR / L.

To understand this, consider a simple example. Suppose that a point object that moves from point A to point B along a circular path with a radius of 1 meter. The distance between points A and B is also 1 meter. Therefore, the size of the angle θ is equal to 2π × 1 / 1 = 2π radians.

In general, the size of the angle θ = ratio of the circumference of the circle to the distance between points A and B. The circumference of the circle is equal to 2πR, where R = radius of the circle. Therefore, the size of the angle θ is equal to 2πR / L.

Find out more on angle size here: https://brainly.com/question/30854951

#SPJ1

Complete question:

A point object moves from point A to point B along a circular path with a radius R. What is the size of the angle θ?

Answer: Gravitational Forces

Explanation:

The boat’s resultant velocity is v = 31.0 m/s, and the direction of the boat is 23.2 degrees north of east.

A resultant velocity is calculated using the formula below.

Vm equals Sum Sqrt(Vxi2 + VYj2)

where Vm is the resulting magnitude of velocity.

All x-component velocities are denoted by the letters Vxi.

The y-component of all velocities is called Vyj.

Add all of the values for the x-components together, square that number to get the magnitude of the resultant velocity. Add this to the earlier value after doing the same operation for the y-components. Finally, to determine the magnitude, square the result.

Tan-1 (Vx/Vy) = Va

where Va is the resultant velocity's angle.

Vx is the size of the resultant velocity's x-component.

Vy is the size of the resultant velocity's y-component.

To learn more about resultant velocity please visit-
https://brainly.com/question/9163788
#SPJ9

Answer:

The correct answer is A. Crossing over occurs