Sources of error could have come from friction that may result in energy losses during the collision, The gliders may not be perfectly elastic, which means that some energy may be lost during the collision
are these errors random or systematic errors?

Sources of error could have come from small amounts of friction, and glider 2 could have not been totally at rest. These errors are systematic errors.
Are these errors random or systematic?

Given that,

Mass of a box, m = 150 kg

It is pushed at an angle of 15 degrees with the horizontal.

It is 8.1 m long.

The coefficient of kinetic friction between the box and the incline is 0.4

To find,

The work done in pushing the box.

Solution,

First let's see the net force acting on the box.

\(F_{net}=mg\sin\theta+f_k\\=mg\sin\theta+\mu_k mg\cos\theta\)

Work done is given by :

W = force × displacement

\(W=(mg\sin\theta+\mu_k mg\cos\theta)\times s\\\\=150\times 10(\sin15+8.1\times \cos15)\times 8.1\\\\=98206.24\\\\or\\\\=98.2\ kJ\)

So, the required work done is 98.2 kJ.

Answer:

50 m/s^2

Explanation:

F=ma

25 N= 0.5 kg • a

divide both sides by 0.5 kg

a=50 m/s^2

The correct answer is (2)

A car bumper bounces back after a collision is not an exampl

The velocity of the car is 5.5 m/s. Then the centripetal acceleration of the car will be 0.6 m/s².

Acceleration is a physical quantity measuring the rate of change in velocity. It has both magnitude and direction.

Centripetal acceleration is the acceleration of an  object moving through a circular path. Thus its measures the rate of change in velocity of the body moving in the curvature path.

The centripetal acceleration = V²/R.

Where R is the radius of the curvature path.

The car moves 50 m in 9 seconds. Its velocity is 50/9 = 5.5 m/s.

Thus, centripetal acceleration = (5.5 × 5.5) m/s/ 50 m = 0.6 m/s².

Therefore, the centripetal acceleration of the car moving at a speed of 9 m/s through curvature path is 0.6 m/s².

To find more on centripetal acceleration, refer here:

https://brainly.com/question/14465119

#SPJ1

The work done by the centripetal force during one revolution is 25.12 J.

Work is said to be done when ever a force moves moves a body through a certain distance.

To calculate the workdone by the centripetal force during one revolution, we use the formula below.

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

Hence, the work done is 25.12 J.

Learn more about work done here: https://brainly.com/question/25573309

#SPJ1

Answer:

The speed of the freight car decreases.

Explanation:

According to the law of conservation of momentum indicates that for colliding in an isolated system, the total momentum pre and post collision is same for the two objects this is done because the momentum that one item has lost is same for the momentum that the other received

In the given situation, the freight car travels at constant speed along a frictionless railroad line. The top floor freight car is open. Then a huge load of coal is dumped inside the car.

Therefore the speed of the freight car decreased by applying the law of conservation of momentum i

Answer:

The inner planets are less dense than the outer planets

Please brainliest my answer iam begging you for god sake

Answer:

The inner planets are less dense than the outer planets .

Explanation:

Answer: To find the total resistance of the wires, we need to use a formula that takes into account the length and cross-sectional area of the wires and the resistivity of the material they are made of. By plugging in the appropriate values for the length, cross-sectional area, and resistivity of the wires in the formula, we can find the individual resistances of the wires. Then, by using another formula for the total resistance of a parallel combination, we can find the effective resistance of the wires in parallel.

Explanation:R = ρ * (L / A)

where R is the resistance of the wire, ρ is the material's resistivity (resistance per unit length), L is the length of the wire, and A is the cross-sectional area of the wire.
according to the given data
AP= 40 cm
px=60cm

Next, we need to calculate the wire PX's length and cross-sectional area. The length is given as 60 cm, and we can assume the same diameter of 1 mm, giving a cross-sectional area of 0.785 mm^2.

Now we can calculate the resistance of each wire using the formula above:

R_AX = ρ * (80 cm / 0.785 mm^2) = 101.91 * ρ

R_PX = ρ * (60 cm / 0.785 mm^2) = 76.43 * ρ

The total resistance of the parallel combination is given by the formula:

1/R_total = 1/R_AX + 1/R_PX

Substituting the values of R_AX and R_PX, we get:

1/R_total = 1/(101.91 * ρ) + 1/(76.43 * ρ)

1/R_total = (1.55 / ρ)

R_total = ρ / 1.55

therefore, the effective resistance of the parallel combination is (ρ / 1.55) ohms

Answer:

σ = ±708 nC/m²

Q = ±177 nC

Explanation:

given data

Side of copper plate L = 50 cm

Electric field, E = 80 kN/C

solution

we get here Charge density,σ that is express as

σ = E x ε₀         ....................1

here ε₀ is Permittivity of free space that is 8.85 x 10⁻¹² C²/Nm²

so put value in eq1we get

σ = 80 x 10³ x 8.85 x 10⁻¹²

σ = 708 x 10⁻⁹ C/m²

σ = 708 nC/m²

and

now we get here total change on each faces

Q = σ  A    ...............2

Q = 708 x 10⁻⁹ x (0.50)²

Q = 177 nC

Answer:

p/2

Explanation:

Answer:

5.634004 × 10^7

Explanation:

the number 7 is for the numbers before the number 5

Answer:

Entropy is typically defined as either the level of randomness (or disorder) of a system or a measure of the energy dispersal of the molecules in the system.

Answer:

entropy

Explanation:

edge2021

The given statement about “Nuclear energy is a clean energy source with virtually no greenhouse gas emissions.” is true, because Nuclear is a zero-emission clean energy source.

Fission is the process by which atoms of uranium are separated to release energy, and this is how nuclear power plants produce electricity. Electricity is produced without the emission of hazardous pollutants often associated with the combustion of fossil fuels by using the heat released by fission to create steam that turns a turbine. The Nuclear Energy Institute (NEI) estimates that in 2020 the United States will have prevented the release of about 471 million metric tons of carbon dioxide. That's more than all other forms of clean energy put together, and it's the same as taking 100 million cars off the road. In addition to preventing acid rain, pollution, lung cancer, and cardiovascular illness, it also cleans the air by thousands of tons annually.

To learn more about nuclear energy, click here:

https://brainly.com/question/28861354

#SPJ4

In general, option c - warming it up on the stove - is often an effective method to increase the reaction rate.

Increasing the temperature of a reaction generally leads to faster reaction rates. This is because higher temperatures provide more thermal energy to the reactant particles, causing them to move faster and collide more frequently. The increased collision frequency and energy lead to more successful collisions and a higher likelihood of effective molecular interactions, which speeds up the reaction. On the other hand, options a and b - putting it in the fridge where it is cold or covering it with a blanket to make it dark - are unlikely to have a significant effect on the reaction rate. While temperature can influence reaction rates, cooling the reaction or making it dark typically reduces the kinetic energy of the particles, resulting in slower reaction rates. Option d - there is nothing you can do to change the speed of the reaction - is not accurate. The reaction rate can be influenced by various factors such as temperature, concentration, catalysts, and surface area, among others. By manipulating these factors, it is often possible to control and change the speed of a reaction. Hence option c, is correct

for more questions on reaction
https://brainly.com/question/4431224
#SPJ8

Answer:

If he's 500 kg and 1 kg = 10 N then it would be 5,000 N

Explanation:

The surface area is unimportant and they'll use it to trick you.

the frequency of the piano key is 476 Hz.

Frequency describes the number of waves that pass a fixed place in a given amount of time. In physics, frequency is the number of waves that pass a fixed point in a unit of time as well as the number of cycles or vibrations that a body in periodic motion experiences in a unit of time.

Given, When a 480 Hz. tuning fork and a piano key being struck together, four beats per second are heard.

The frequency of the tuning fork, Nf = 480 Hz

Beats heard at this frequency, x = 4 beats/second

When a 470 Hz. tuning fork and a piano key being struck together, four beats per second are heard.

The equation for the Frequency of the piano,

Np = Nf - x

Np = 480 - 4

Np = 476 Hz

When tension has increased the frequency also increased. As the number of beats decreased, the frequency of the string must be less than 480 Hz.

Therefore, the frequency of the piano key is 476 Hz.

Learn more about frequency here:

https://brainly.com/question/5102661

#SPJ1

Answer:

I would say the answer is All the above.

Explanation:

If this wasn't what you were looking for please don't hesitate to comment again! Have a nice day/night! :)

Answer:

all the above

Explanation:

The frequency of the radiation = 10GHz

The wavelength of the electromagnetic radiation, λ = 3.5 cm

λ = 3.5/100 m

λ = 0.035 m

The speed of light, c = 3 x 10⁸ m/s

Calculate the frequency (f) of the radiation using the formula:

The frequency of the radiation = 10GHz

Answer:

The magnitude of the acceleration is \(a_r = 1.50 \ m/s^2\)

The direction is  \(\theta = 32.5 6^o\) north of  east

Explanation:

From the question we are told that

   The force exerted by the wind is  \(F_{sail} = (330 ) \ N \ north\)

   The force exerted by water is  \(F_{keel} = (210 ) \ N \ east\)

      The mass of the boat(+ crew) is  \(m_b = 260 \ kg\)

Now Force is mathematically represented as

      \(F = ma\)

Now the acceleration towards the north is mathematically represented as

      \(a_n = \frac{F_{sail}}{m_b}\)

substituting values

       \(a_n = \frac{330 }{260}\)

      \(a_n = 1.269 \ m/s^2\)

Now the acceleration towards the east is mathematically represented as

       \(a_e = \frac{F_{keel}}{m_b }\)

substituting values

      \(a_e = \frac{210}{260}\)

      \(a_e =0.808 \ m/s^2\)

The resultant acceleration is  

      \(a_r = \sqrt{a_e^2 + a_n^2}\)

substituting values

     \(a_r = \sqrt{(0.808)^2 + (1.269)^2}\)

      \(a_r = 1.50 \ m/s^2\)

The direction with reference from the north is evaluated as

Apply SOHCAHTOA

        \(tan \theta = \frac{a_e}{a_n}\)

       \(\theta = tan ^{-1} [\frac{a_e}{a_n } ]\)

substituting values

     \(\theta = tan ^{-1} [\frac{0.808}{1.269 } ]\)

    \(\theta = tan ^{-1} [0.636 ]\)

   \(\theta = 32.5 6^o\)

The total heat supplied by the plant to convert the water to steam is 596.7 kcal.

Heat capacity is the quantity of heat required to raise the temperature of entire mass of a substance.

Q = Heat supplied to the water to the boiling point + Heat supplied to vaporize the water.

Q = mc₁Δθ + mc₂Δθ + mLv

where;

Substitute the given parameters and solve for the heat supplied in the process.

Q = (1)(1)(100 - 58.6) + (1)(0.48)(131.8 - 100)  + 540(1)

Q = 41.4 + 15.264 + 540

Q = 596.7 kcal

Thus, the total heat supplied by the plant to convert the water to steam is 596.7 kcal.

Learn more about heat capacity here: https://brainly.com/question/16559442

#SPJ1

Answer:

  C)  There will be no change in the balance

Explanation:

Before and after the cork is placed, the masses in each pan are the same. There will be no change in the balance.

Answer:

a)

\(u(t)=0.499ft.e^{-\frac{144.76lb/s}{2(48lb)}t}cos(\omega t)\\\\u(t)=0.499ft.e^{-1.5t}cos(\omega t)\)

b)

m = 48lb

c)

b = 144.76lb

Explanation:

The general equation of a damping oscillate motion is given by:

\(u(t)=u_oe^{-\frac{b}{2m}t}cos(\omega t-\alpha)\)    (1)

uo: initial position

m: mass of the block

b: damping coefficient

w: angular frequency

α: initial phase

a. With the information given in the statement you replace the values of the parameters in (1). But first, you calculate the constant b by using the information about the viscous resistance force:

\(|F_{vis}|=bv\\\\b=\frac{|F_{vis}|}{v}\\\\|F_{vis}|=27lbs=27*32.17ft.lb/s^2=868.59ft.lb/s^2\\\\b=\frac{868.59}{6}lb/s=144.76lb/s\)

Then, you obtain by replacing in (1):

6in = 0.499 ft

\(u(t)=0.499ft.e^{-\frac{144.76lb/s}{2(48lb)}t}cos(\omega t)\\\\u(t)=0.499ft.e^{-1.5t}cos(\omega t)\)

b.

mass, m = 48lb

c.

b = 144.76 lb/s

The claims of the healers are merely pseudoscience because we can not be able to back it empirically or reproduce the results.

In order to answer the question that is before us, we would have to look closely at the idea of science. We know that science depends on empiricism. This implies that we must be able to have verifiable and reproducible evidences for whatever proposition that is to be made in the field of science. This is a key fact that we must have in mind.

On the other hand, pseudoscience only depends on subjective views and principles that could be determined by individuals and is not independently verifiable by means of controlled experiments.

As such, the ideas of the healers are based on pseudo science because as we said, real science must be reproducible and the claims of the results independently verifiable but the results that is obtained by the healers dos not meet any of these criteria.

Learn more about pseudoscience:https://brainly.com/question/12257058

#SPJ1

Answer:

-19.09°.

Due to several approximations been applied in the detailed process, the angle given on image 2 (-18.17°) is slight minor compared to what can be obtained through direct calculations (-19.09°).

Check images below.

Note: If you want to calculate the length of the new vector, just need to apply the pythagorean theorem and taking the components of the result vector as if they were the 2 sides of a right triangle.

570k or 1050k

270k+290k= 570k

270k•290k = 1050k

The force actually being used to push the mower along the ground is 191 N.

When the physics student exerts a force of 250 N along the handle of the push mower, it's important to consider the components of this force that contribute to the actual force used to push the mower along the ground.

To determine the force used to push the mower along the ground, we need to find the horizontal component of the applied force. The angle of 40° indicates that the applied force can be broken down into two components: the horizontal component and the vertical component. The vertical component of the force is perpendicular to the direction of motion and does not contribute to pushing the mower forward.

To find the horizontal component, we can use trigonometry. The horizontal component is given by the formula:

Horizontal component = Applied force * cos(angle)

Plugging in the values, we get:

Horizontal component = 250 N * cos(40°)

Calculating this value, we find that the horizontal component of the applied force is approximately 191 N.

Therefore, the force actually being used to push the mower along the ground is 191 N. This is the component of the applied force that contributes to the forward motion of the mower, while the remaining vertical component is directed perpendicular to the ground and does not assist in pushing the mower forward.

By exerting a force of 250 N along the handle at a 40° angle, the student effectively applies 191 N of force to push the mower along the ground, ensuring efficient use of their effort while considering the environmental impact.

for more questions on force

https://brainly.com/question/30817883

#SPJ8

Answer:

Quick Check:

12-17-20

Conservation of Energy

In the use of an energy resource like coal, do you get all

the energy back in one form(100%)? (circle one)

Yes

No

Explanation:

Not sure

Answer:

b

Explanation: