You are driving your 1700 kg car at 18 m/s down a hill with a 5.0∘ slope when a deer suddenly jumps out onto the roadway. You slam on your brakes, skidding to a stop.
How far do you skid before stopping if the kinetic friction force between your tires and the road is 1.5×10^4 N?Solve this problem using conservation of energy.
Express your answer to two significant figures and include the appropriate units.

Answer:

Of the inner planets, Mercury and Venus have no natural satellites; Earth has one large natural satellite, known as the Moon; and Mars has two tiny natural satellites, Phobos and Deimos.

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Earth has one large natural satellite, known as the Moon.

In fact, most satellites -- especially the bits of debris -- are too faint to be seen with the unaided eye. But depending on who's counting, several hundred can be spotted with the unaided eye.

Right now, there are nearly 6,000 satellites circling our tiny planet. About 60% of those are defunct satellites—space junk—and roughly 40% are operational. The Union of Concerned Scientists (UCS), determined that 2,666 operational satellites circled the globe in April of 2020.

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Answer:

i Think It Is D

The answer is option (a)"decreases its energy" as doubling the momentum of a neutron leads to a decrease in its energy.

The de Broglie wavelength equation is given by λ = h/p, where λ is the wavelength of a particle, h is the Planck constant, and p is the momentum of the particle. This equation shows that the wavelength of a particle is inversely proportional to its momentum.

Therefore, if the momentum of a neutron is doubled, its wavelength will be halved (option (d) in the question).

However, the energy of a neutron is proportional to the square of its momentum, i.e., E = p\(^2/2m\), where E is the energy of the neutron, and m is its mass.

Therefore, if the momentum of a neutron is doubled, its energy will be quadrupled (not listed in the options).

Thus, option (a) "decreases its energy" is the correct answer.

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Answer:

Below

Explanation:

VERTICAL velocity will be   v  sin 34

HORIZONTAL velocity will be   v cos 34  = 86 cos 34 = 71.3 m/s

Answer:

1. If you “feel the burn” while exercising, what is actually going on in your body?

= D. Lactic acid is taking the place of oxygen in the muscle.

2. Why does strenuous activity make the heart beat faster?

= C. The body requires more oxygen when exercising.

3. When lifting something heavy, which is the MOST important factor in doing it safely?

= C. your form when you are lifting.

4. Sasha does not have access to a gym or fitness equipment. Is it possible for him to develop a good fitness routine with what he has at home?

= D. Yes, there are cardio and strength training exercises he can do without equipment.

5. Aerobic exercise is good for many of the main systems of the body. Which of the following does it NOT help with?

= A. flexibility

Explanation:

how to alweays win amoung us_

Answer:

Velocity

Explanation:

Since velocity is magnitude and direction, 40mph south is velocity.

Answer:

60000 newtons

Explanation:

Force=mass × acceleration

60000

The wavelength range of photons that produce 40-keV electrons in Compton scattering is approximately 0.031 nanometers to 0.035 nanometers.

In Compton scattering, a photon collides with an electron, causing the photon to lose energy and change direction. The amount of energy lost by the photon is determined by the angle of scattering and the initial energy of the photon.

The maximum energy that can be transferred to the electron is equal to the energy of the incident photon minus the energy of the scattered photon.

To calculate the wavelength range of photons that produce 40-keV electrons in Compton scattering, we can use the equation E = hc/λ, where E is the energy of the photon, h is Planck's constant, c is the speed of light, and λ is the wavelength of the photon. Rearranging the equation, we get λ = hc/E.

For a 40-keV electron, the energy of the incident photon can be calculated by subtracting the rest mass energy of the electron from the total energy: E = 40 keV + 511 keV = 551 keV. Using the above equation, we can calculate the wavelength range to be approximately 0.031 nm to 0.035 nm.

This range falls within the X-ray region of the electromagnetic spectrum and is commonly used in medical imaging and material analysis.

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A device that is capable of moving atoms and molecules with a laser beam is called an optical tweezer. The correct option is B)

This technology was first introduced by Arthur Ashkin in 1986 and has since revolutionized the field of physics and biology. Optical tweezers use the force of light to trap and manipulate small particles, such as individual atoms and molecules. The laser beam creates a gradient of light intensity, which generates a force that can move and hold particles in place.

This technique has a wide range of applications, including the study of cell mechanics, protein folding, and the assembly of nanostructures. Optical tweezers have also been used in the development of micro-machines, sensors, and other advanced technologies. This device is not to be confused with an atom smasher, which is used to accelerate subatomic particles to high speeds, or a laser scalpel, which is used for precise surgical procedures.

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Answer:

At the instant shown in the diagram, the car's centripetal acceleration is directed is discussed below in detail.

Explanation:

The direction of the centripetal acceleration is in a circular movement is forever towards the middle of the roundabout pathway. In the picture displayed, the East direction is approaching the center. So, the course of the car's centripetal acceleration is (H) toward the east.

Answer:

4 m

Explanation:

\(v = f \times  λ\)

speed of sound wave (according to question)

= 1 × 1000 = 1000m/s

wavelength is represented by λ

therefore to find the wavelength, divide the speed by the frequency of the second wave given by the question

λ of another wave = 1000 ÷ 250 = 4 m

Speed of sound equals wavelength and frequency. The wavelength of the sound wave if the frequency is 250hz is 4 meters.  

Sound requires a medium to propagate in the form of vibration. It is the pattern of disturbance caused by the movement of energy particles propagating through the medium.

Sound waves can travel in the form of transverse and longitudinal waves. When the sound source continues to vibrate in the medium, the vibrations are propagated in the form of sound waves.

The sound waves travel at different speeds in different mediums. the speed of sound waves remains constant in the same medium. The speed of sound waves is directly proportional to wavelength and frequency.

Wavelength(λ) measures the distance between two crests/ two troughs in a wave and its SI unit is a meter. The frequency (f) of a wave is the number of waves that pass in a certain time and its unit is hertz(Hz). The SI unit of the speed sound wave is m/s.

From the givens,

wavelength(λ) = 1 meter.

frequency (f) = 1000hz.

Speed of wave(v) = wavelength × frequency

                              = 1 × 1000

                           v   = 1000 m/s.

speed of wave = 1000 m/s.

frequency = 250hz

wavelength(λ) = speed / frequency

                        = 1000 / 250

                        = 4 meters.

Hence, the wavelength(λ) of a 250 hz sound wave is 4 meters.

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Answer:

=2 000 000 Litres

Explanation:

Density=mass/volume

1000kg/m^3=0.50×Volume

Volume=2000m^3

apparently I searched it up and

1m^3=1000 litres.

Answer:

I assume its c. Since its talking about testing.

Explanation:

Answer:

The answer is test of durability

Explanation:

Answer:

P V = N R T        describes an ideal gas

T2 / T1 = P2 V2 / (P1 * V1) = 4

T1 = 273 + 10 = 283        initial absolute temperature of gas

Let's first resolve the two forces into their components as shown in the diagram below: The larger force (617 N) makes an angle of 46° with the horizontal axis.

Therefore, the horizontal component will be given by:

H = 617 cos 46°H = 617 × 0.69H = 425.73 N

The vertical component will be given by:V = 617 sin 46°V = 617 × 0.73V = 450.66 NOn the other hand, the smaller force (411 N) makes an angle of (90° - 46°) = 44° with the horizontal axis. Therefore, the horizontal component will be given by:H = 411 cos 44°H = 411 × 0.72H

= 296.52 N

The vertical component will be given by:V = 411 sin 44°V = 411 × 0.67V = 274.47 N The resultant horizontal component, R will be given by:R = 425.73 + 296.52R = 722.25 N The resultant vertical component, R will be given by:R = 450.66 + 274.47R = 725.13 N The magnitude of the resultant, R will be given by:R² = (722.25)² + (725.13)²R = √(522198.06)R = 722.82 N The angle that R makes with the larger force (617 N) will be given by:θ = tan⁻¹(725.13/722.25)θ = 45.23° Therefore, the magnitude of the resultant is 722.82 N and it makes an angle of 45.23° with the larger force.

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We want to see if the Trust SSC can archive a higher maximum speed.

Remember the second Newton's law:

Force = mass*acceleration.

And acceleration is the rate of change of the velocity.

Assuming the mass of the Trust SSC does not change, increasing the force would mean that we increase the acceleration, and thus, larger velocities can be reached.

Now there are some problems.

How we do increase the force?.

It is hard to ve precise, mostly because we don't really know how the system works, we just got some given random data that we can't use without context.

Another thing we need to remember, this velocity is measured in only one mile. So because we have a fixed distance to measure it, we only can get larger velocities by increasing the acceleration.

And to increase the acceleration we can increase the force, as discussed, or, decrease the mass.

How to decrease the mass? Using lighter materials.

Now let's see an example on how decreasing the mass would affect the acceleration.

Then an aproximate force is given by:

F = 10,700kg*20.8 m/s^2 = 222,560 N

Now, if we decrease the mass a little bit, for example to 10,000kg, and we do not change the force, the new acceleration will be given by:

10,000kg*a = 222,560 N

a = (222,560 N)/(10,000kg) = 22.3 m/s^2

So decreasing the mass a little, increases the acceleration, which would make a larger maximum velocity.

Concluding, there are two ways of increasing the maximum velocity:

Increasing the force.

Decreasing the mass of the car.

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It took jet 1.6 seconds to accelerate from 100 m/s to 150 m/s over the distance of 200m.

Acceleration is defined as the rate of change of velocity (v) with respect to time. Mathematically, the instantaneous measurement of acceleration is given by-

a = dv/dt

Given is a jet moving at 100 m/s such that it accelerated to a speed of 150 m/s over the distance of 200m. From this, we can write -

Initial velocity [u] = 100 m/s

Final velocity [v] = 150 m/s

Distance covered [d] = 200m

Using the third equation of motion -

v² - u² = 2aS

150 x 150 - 100 x 100 = 2 x a x 200

250 x 50 = 400a

a = (250 x 50)/400

a = 31.25 m/s²

Using first law of motion -

v = u + at

150 = 100 + 31.25t

t = 50/31.25

t = 1.6 seconds

Therefore, it took jet 1.6 seconds to accelerate from 100 m/s to 150 m/s over the distance of 200m.

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1.  The de Broglie wavelength of a hydrogen atom traveling at 445 m/s is 8.93 picometers.

2. A. The energy of a photon of red light from a helium-neon laser is 3.14 x 10^-19 J

B. The energy of a photon of microwave oven radiation is 1.63 x 10^-24 J.

C. The energy of a photon of nitrogen laser radiation is 1.86 x 10^-18 J.

To calculate the de Broglie wavelength (λ), we can use the formula:

λ = h / p

where h is Planck's constant (6.626 x 10^-34 J.s) and p is the momentum of the particle.

For a hydrogen atom with mass m = 1.67 x 10^-27 kg traveling at a speed of v = 445 m/s, we can calculate its momentum as:

p = m * v = 1.67 x 10^-27 kg * 445 m/s = 7.42 x 10^-25 kg.m/s

Substituting this into the formula, we get:

λ = h / p = 6.626 x 10^-34 J.s / 7.42 x 10^-25 kg.m/s = 8.93 pm

Therefore, the de Broglie wavelength of a hydrogen atom traveling at 445 m/s is 8.93 picometers.

For the second part of the question, the energy (E) of a photon of electromagnetic radiation can be calculated using the formula:

E = hc / λ

where h is  Planck's constant (6.626 x 10^-34 J.s), c is the speed of light (2.998 x 10^8 m/s), and λ is the wavelength of the radiation.

a. For a wavelength of 632.8 nm:

E1 = hc / λ = 6.626 x 10^-34 J.s * 2.998 x 10^8 m/s / (632.8 x 10^-9 m) = 3.14 x 10^-19 J

Therefore, the energy of a photon of red light from a helium-neon laser is 3.14 x 10^-19 J.

b. For a wavelength of 12.24 cm:

E2 = hc / λ = 6.626 x 10^-34 J.s * 2.998 x 10^8 m/s / (12.24 x 10^-2 m) = 1.63 x 10^-24 J

Therefore, the energy of a photon of microwave oven radiation is 1.63 x 10^-24 J.

c. For a wavelength of 337.1 nm:

E3 = hc / λ = 6.626 x 10^-34 J.s * 2.998 x 10^8 m/s / (337.1 x 10^-9 m) = 1.86 x 10^-18 J

Therefore, the energy of a photon of nitrogen laser radiation is 1.86 x 10^-18 J.

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"A notch is a distortion in a voltage waveform where the voltage quickly drops toward zero and then returns to the correct value."

In general, the primary overcurrent device is not considered to safeguard transformer secondary wires. Transformers with two windings are all isolation transformers.

A voltage waveform distortion known as notching is brought on by intense current bursts of very short duration. These distortions generally show up graphically as a notch in the waveform's time domain representation.

When current commutates from one phase to another during normal operation of power electronic devices, a sort of periodic waveform distortion called voltage notching is created. The most significant instance of voltage notching occurs in three-phase converters. The transition of the current from one phase to another causes the notches.

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The standard volume of hydrogen peroxide used with permanent hair color is typically 20 volume (6%).

The standard volume of hydrogen peroxide used with permanent hair color is typically 20 volume (6%). It is important to note that different hair color brands or formulations may offer different volumes of hydrogen peroxide options, so it is always advisable to refer to the specific instructions and recommendations provided by the hair color manufacturer.

The percentage value, in this case, 6%, indicates the weight of hydrogen peroxide present in the formulation. In a 20 volume hydrogen peroxide solution, 6% of the total weight is hydrogen peroxide, while the remaining 94% consists of other components, such as water, stabilizers, and conditioners.

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The dead frequencies are as follows:

Dead Frequencies = 4.37 Hz, 13.1 Hz, 21.9 Hz, 30.7 Hz, 39.4 Hz, 48.2 Hz, 57.0 Hz, 65.7 Hz, 74.5 Hz, 83.2 Hz, 92.0 Hz, 100.8 Hz, 109.6 Hz.

To find the dead frequencies, the difference in the path length from each loudspeaker to the point on the opposite sideline needs to be calculated. This will help to find if the waves will interfere destructively or constructively.

The two loudspeakers are mounted on the upper left and right corners of the box, which is 12.0 yards wide, and the point on the opposite sideline is 35.0 yards away from the sidelines.

Using the Pythagorean Theorem, the distance from each speaker to the point on the opposite sideline can be calculated.

The result is as follows:

d1² = (35.0 + 20.0)² + 12.0²

d1² = 2017.6

d1 = 44.9 m (d2 is the same as d1 because the setup is symmetric).

Now, the difference in the path length is calculated as follows:

Δd = d2 - d1

Δd = 0 Hz

Because the path length difference is an integral multiple of the wavelength λ. The frequencies for which there is destructive interference can be found by using the formula:

v = fλ

λ = v / f

λ = 343 m/s / 35 m

λ = 9.8 m

Now, the difference in the path length can be calculated using:

Δd = mλ, where m is an integer Δd = 9.8 m, 19.6 m, 29.4 m, 39.2 m, and 49.0 m.

The frequencies for which there is destructive interference are:

Dead Frequencies = (m/2) (343/39.2), where m is an odd integer from 1 to 25.

Dead Frequencies = (1/2) (343/39.2)

Dead Frequencies = 4.37 Hz

Dead Frequencies = (3/2) (343/39.2)

Dead Frequencies = 13.1 Hz

Dead Frequencies = (5/2) (343/39.2)

Dead Frequencies = 21.9 Hz

Dead Frequencies = (7/2) (343/39.2)

Dead Frequencies = 30.7 Hz

Dead Frequencies = (9/2) (343/39.2)

Dead Frequencies = 39.4 Hz

Dead Frequencies = (11/2) (343/39.2)

Dead Frequencies = 48.2 Hz

Dead Frequencies = (13/2) (343/39.2)

Dead Frequencies = 57.0 Hz

Dead Frequencies = (15/2) (343/39.2)

Dead Frequencies = 65.7 Hz

Dead Frequencies = (17/2) (343/39.2)

Dead Frequencies = 74.5 Hz

Dead Frequencies = (19/2) (343/39.2)

Dead Frequencies = 83.2 Hz

Dead Frequencies = (21/2) (343/39.2)

Dead Frequencies = 92.0 Hz

Dead Frequencies = (23/2) (343/39.2)

Dead Frequencies = 100.8 Hz

Dead Frequencies = (25/2) (343/39.2)

Dead Frequencies = 109.6 Hz

Therefore, the dead frequencies are as follows:

Dead Frequencies = 4.37 Hz, 13.1 Hz, 21.9 Hz, 30.7 Hz, 39.4 Hz, 48.2 Hz, 57.0 Hz, 65.7 Hz, 74.5 Hz, 83.2 Hz, 92.0 Hz, 100.8 Hz, 109.6 Hz.

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Answer:

v = 10m/s.

Explanation:

100 = 1/2×2×v^2

100 = 1×v^2

v^2 = √100

v=10 m/s

Answer:

Correct Answer: Option B

Explanation:

Explanation

P1/T1 = P2/T2

80/(273+47) = P1/(273+27) = 75Nm-2

Answer: 75.0 Nm^-2

Explanation:

P1/T1 = P2/T2 80/(273+47) = P1/(273+27) = 75Nm-2

The final velocity of the cannon camera is 22m/s

This question informs us that David will depart on a voyage at his maximum speed. Consequently, the speed is 80 km/h. So we have to convert. At a 2 m/s rate, listen. We must multiply our number of 80 by the quantity of meters in a club in order to convert it to units. His final velocity therefore equals 22.2

a= v/ t = 56m/sec square dec acceleration = 80km/h converting into final velocity m /s sec its 22.2m/s

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Two boys of masses 45kg and 60kg sit facing one another on light frictionless trolleys holding the ends of a strong taut cord between them. The lighter boy tugs the cord and acquires a velocity of 2m/s. The initial velocity of the other boy is -1.5m/s. Their motion when they collide will either both come to a stop or move together at the same velocity.

The initial velocity of the other boy can be found using the principle of conservation of momentum.

Momentum before the tug = Momentum after the tug

(45kg)(0) + (60kg)(0) = (45kg)(2m/s) + (60kg)(v)

0 = 90kg*m/s + 60kg*v

60kg*v = -90kg*m/s

v = -90kg*m/s / 60kg

v = -1.5m/s

The initial velocity of the other boy is -1.5m/s.

When the two boys collide, their motion will be affected by the principle of conservation of momentum. The total momentum before the collision will equal the total momentum after the collision. Since the two boys have equal and opposite momenta before the collision, their total momentum is zero. After the collision, their total momentum will still be zero, meaning that they will either both come to a stop or move together at the same velocity. The exact outcome will depend on the specifics of the collision, such as whether it is elastic or inelastic.

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Answer:

A. Be behind the package

Answer:

I say that the answer is D all of the above hope this helps ‍♂️

Based on the given sentences, let's sort them into the correct categories: radio waves, visible light waves, or both.

Radio waves:

- They're used to learn about dust and gas clouds.

Visible light waves:

- They have colors.

- They're used to find the temperature of stars.

Both radio waves and visible light waves:

- They can travel in a vacuum.

- They have energy.

- They're invisible.

Sorted table:

| Radio Waves          | Visible Light Waves  | Both                 |

|----------------------|----------------------|----------------------|

| They're used to learn about dust and gas clouds. | They have colors.     | They can travel in a vacuum. |

| -                      | They're used to find the temperature of stars. | They have energy.         |

| -                      | -                       | They're invisible.           |

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Answer:

Light wave is an EM wave that can only be seen by humans New questions in Physics Engineers at the Space Centre must determine the net force needed for a rockets engine to achieve an acceleration of 70 m/s2.

Explanation: