Brian slows from 129 m/s to 105 m/s in 4.50 seconds.

What is Bryant average speed?

What distance to Brian travel?

When a bike hits a crack and you go forward, the law of motion that explains this phenomenon is Newton's first law of motion, also known as the law of inertia.

Newton's first law states that an object at rest will remain at rest, and an object in motion will continue moving with a constant velocity in a straight line unless acted upon by an external force. In other words, an object will maintain its state of motion (or rest) unless an external force is applied to it.

In the case of the bike hitting a crack, the bike and the rider are in motion before encountering the crack. As the bike wheel hits the crack, it experiences an abrupt change in the surface it's traveling on, resulting in a sudden deceleration or jolt. However, due to inertia, the rider's body tends to resist changes in motion.

As a result, the rider's body tends to continue moving forward with the same velocity as before, while the bike undergoes a deceleration or momentarily comes to a stop. This difference in motion between the rider's body and the bike causes the rider to be propelled forward relative to the bike.

The forward movement of the rider is a consequence of the inertia of their body. The rider's body wants to maintain its forward velocity, even if the bike decelerates or stops momentarily due to the impact with the crack. This can lead to the rider being thrown forward or off balance, depending on the severity of the impact and the rider's ability to maintain control.

Therefore, the phenomenon of the bike hitting a crack and the rider moving forward can be explained by Newton's first law of motion, highlighting the tendency of objects to maintain their state of motion unless acted upon by an external force.

To know more about law of inertia, please click on:

https://brainly.com/question/1830739

#SPJ11

Answer:

Solution: When an ebonite rod is rubbed with fur, fur loses electrons and ebonite rod gains electrons. fur becomes positively charged and rod becomes negatively charged.

Explanation:

HOP3 IT HELP^_^

THANKS^_^

Insulating the cable with rubber having a thermal conductivity of 0.15 W/m degree increases the heat flow from the cable to 63.80 W per meter length compared to a non-insulated cable in an atmosphere with a temperature difference of 50 degrees Celsius. The correct option is C.

To determine how the heat flow from the cable is affected by insulation, we need to calculate the heat transfer rate for both the insulated and non-insulated cases. The heat transfer rate can be determined using the formula:

Q = (T2 - T1) / (R_total)

Where:

Q is the heat transfer rate per unit length (W/m),

T2 is the surface temperature of the cable (75 degrees Celsius),

T1 is the ambient temperature (25 degrees Celsius),

R_total is the total thermal resistance.

For the non-insulated case:

R_total = R_convection

For the insulated case:

R_total = R_convection + R_insulation

Let's calculate the heat transfer rate for both cases:

Non-insulated case:

R_convection = 1 / (h * A)

A = 2 * π * r * L (surface area of the cable)

Q_non-insulated = (T₂ - T₁) / (R_convection)

Insulated case:

R_insulation = d / (k * A)

Q_insulated = (T₂ - T₁) / (R_convection + R_insulation)

Given the information:

h = 12.5 W/m² degree

k = 0.15 W/m degree

d = 10 mm = 0.01 m

T₂ = 75 degrees Celsius

T₁ = 25 degrees Celsius

By comparing the heat transfer rates for the non-insulated and insulated cases, we can determine the effect of insulation on the heat flow from the cable.

Therefore, by Calculating the values and comparing the heat transfer rates, we find that the correct option is c) 63.80 W per meter length.

To learn more about modes of heat transfer click:

https://brainly.com/question/13143471

#SPJ4

Explanation:

Here,

Mass=16,500kg.

speed=14 m/s.

we know that,

\(\tt{ p=m×v }\) ⠀

where,

p=momentum

m=mass

v=velocity

according to the question,

\(\tt{ momentum =mass×velocity }\) ⠀

\(\tt{ 16500×14 }\) ⠀

\(\tt{ 231000~kg.m/s }\) ⠀

so,

velocity of the car is 231000kg.m/s

Answer:

stress tension tensile strength

Explanation:

The maximum stress which a material can withstand when it is pulled apart is its: stress tension tensile strength.

20 - 5 = 15

total displacement = 15 meters

Answer:

A net force greater than 0 is the answer

Explanation:

trust

Answer:

b c

Explanation:

Given,

We need to find,

Using Newton's first law of motion .

➵ 25.1 = Mass × 3.4

➵ 25.1 ÷ 3.4 = Mass

➵ Mass = 7.38 kg

The thermometer measures the starting temperature as,

The temperature required for the boiling the water is

(a). The temperature requires to boil is,

Answer:

Explanation:

time= distance/speed

20km/ 15km/h

= 1 1/3 hours (4/3 in mixed fraction)

Answer:

Your human reflexes would pull your arm away extremely fast, and you'd be left in pain, this is your nervous system at work. In the long term, you'd be very cautious about stoves

Explanation:

Hope this helps!

If the two steel cylindrical rods, A and B, have the same length (l) and the diameter of rod A (da) is twice the diameter of rod B (db), and they are subjected to the same normal stress, then the stress acting on rod A will be twice the stress acting on rod B.

The stress experienced by a cylindrical rod is given by the formula stress = force/area. In this case, since both rods have the same length (l) and are made of the same material, the force applied to each rod will be the same.

However, the area of rod A (π(da/2)^2) is four times the area of rod B (π(db/2)^2) because the diameter of rod A is twice the diameter of rod B. Therefore, when the same force is applied, the stress acting on rod A will be four times the stress acting on rod B.

In conclusion, if the two steel cylindrical rods have the same length and the diameter of rod A is twice the diameter of rod B, and they are subjected to the same normal stress, the stress on rod A will be twice the stress on rod B.

To learn more about normal stress click here: brainly.com/question/30115203

#SPJ11

Gravity at a distance of r=11re is about 1/121 times (or about 0.00826 times) weaker than the strength of Earth's gravity at its surface, where re is the radius of the Earth.

The strength of gravity is inversely proportional to the square of the distance between two objects. Therefore, at a distance of 11 times the radius of the Earth (r=11re), the strength of gravity will be (1/11)² = 1/121 times (or about 0.00826 times) weaker than the strength of gravity at the Earth's surface (r=re).

This means that an object at that distance would experience only about 0.00826 times the gravitational force that it would experience at the Earth's surface.

This is why the force of gravity is weaker on the Moon, which is farther away from the Earth than the Earth's surface, and why spacecraft traveling to other planets need to use rockets or other means to escape Earth's gravity and travel to their destination.

To know more about Earth's gravity click on below link:

https://brainly.com/question/12054584#

#SPJ11

Answer:

the gravitational force

Answer:

82

Explanation:

According to law of reflection, the angle of incidence = angle of reflection

Answer:

The angle of incidence will be equal to the reflection.

Explanation:

The law of reflection states that when a ray of light reflects off a surface, the angle of incidence is equal to the angle of reflection.

So 82 would be the answer.

The extension of the spring when the ball is allowed to hang straight down, motionless is 0.0032 m.

The given parameters;

The radius of the circular path when spring is stretched is calculated as;

R = l₁ + x

R = 0.201 + 0.0176

R = 0.2186 m

The spring constant is calculated as follows;

\(F = ma\\\\Kx = \frac{mv^2}{R} \\\\K = \frac{mv^2}{Rx} \\\\K = \frac{(3.41)^2 m}{0.2186 \times 0.0176} \\\\K = 3,022.4 m \ N/m\)

The extension of the spring when the ball is allowed to hang straight down, motionless;

\(F = mg\\\\Kx=mg\\\\x = \frac{mg}{K} \\\\x = \frac{9.8 m}{3022.4 m} \\\\x = 0.0032 \ m\)

Thus, the extension of the spring when the ball is allowed to hang straight down, motionless is 0.0032 m.

Learn more here:https://brainly.com/question/15589287

NASA's Europa Clipper will conduct detailed reconnaissance of Jupiter's moon Europa and investigate whether the icy moon could have conditions suitable for life.

The magnetometer investigation aims to confirm that Europa's ocean exists, measure its depth and salinity, and measure the moon's ice shell thickness. It will also study Europa's ionized atmosphere and how it interacts with Jupiter's ionized atmosphere. On February 10, 2021, it was announced that the mission would use a 5.5-year trajectory to the Jovian system, with gravity-assist maneuvers involving Mars (February 2025) and Earth (December 2026). Europa Clipper's main science goal is to determine whether there are places below Europa's surface that could support life. Jupiter's moon Europa shows strong evidence for an ocean of liquid water beneath its icy crust.

To learn more about Europa clipper click here

brainly.com/question/3789149

#SPJ4

The cell cycle advances from G1 phase to S phase when the cyclin–CDK complex phosphorylates RB.

The management of eukaryotic cell proliferation depends on the precise transition from G1 phase to S phase of the cell cycle, and its dysregulation encourages oncogenesis. Growth-dependent cyclin-dependent kinase (CDK) activity encourages DNA replication and starts the transition from G1 to S phase during G1 phase.

By causing alterations in transcription across the entire genome, CDK activation sets off a positive feedback loop that drives up CDK activity even more, committing the cell to division. G1-S transcripts produce proteins that control subsequent cell cycle processes. The intricate molecular mechanisms that regulate the temporal order of transcriptional activation and inactivation, identify distinctive functional subgroups of genes, and link cell cycle-dependent transcription are just now starting to come into focus as a result of recent research.

Learn more about cyclin-cdk Visit : brainly.com/question/13252929

#SPJ4

The (326-2) Type IGS cable is an excellent choice for high-voltage applications where flexibility and reliability are key factors. It is particularly well-suited for use in power transmission and distribution applications where it can help to improve system efficiency and reduce maintenance costs.

The (326-2) Type IGS cable is a factory assembly of one or more conductors, each individually insulated and enclosed in a loose fit nonmetallic flexible conduit. This type of cable is specifically designed as an integrated gas spacer cable and is rated for use up to 35,000 volts.

The nonmetallic conduit used in the IGS cable provides a high degree of flexibility and allows for ease of installation, particularly in challenging environments. Additionally, the integrated gas spacer technology provides enhanced electrical performance by minimizing electrical stress, reducing the risk of corona discharge, and improving the overall reliability of the cable.

To learn more about Voltage :

https://brainly.com/question/1176850

#SPJ11

A. Oatmeal is a great source of soluble fiber. Soluble fiber is a type of fiber that dissolves in water and forms a gel-like substance in the digestive tract. This gel helps slow down digestion, which can help regulate blood sugar levels, lower cholesterol, and promote a feeling of fullness.

Other good sources of soluble fiber include beans, lentils, peas, barley, fruits such as apples and oranges, and vegetables such as carrots and Brussels sprouts. It is recommended to consume at least 25 grams of fiber per day, with at least 10-15 grams coming from soluble fiber.
A good source of soluble fiber is a type of fiber that dissolves in water and forms a gel-like substance in the digestive tract. This gel helps slow down digestion, which can help regulate blood sugar levels, lower cholesterol, and promote a feeling of fullness. According to the American Heart Association, soluble fiber is beneficial for heart health as it binds to cholesterol in the digestive tract and removes it from the body. It is recommended to consume at least 25 grams of fiber per day, with at least 10-15 grams coming from soluble fiber. Some other good sources of soluble fiber include beans, lentils, peas, barley, fruits such as apples and oranges, and vegetables such as carrots and Brussels sprouts. Consuming foods high in soluble fiber can help improve digestion, promote feelings of fullness, and help maintain a healthy weight. Therefore, including soluble fiber in the diet is crucial.
Source: American Heart Association (https://www.heart.org/en/healthy-living/healthy-eating/eat-smart/nutrition-basics/fiber)

To know more about Soluble fiber visit:
https://brainly.com/question/31179196
#SPJ11

The average power required by a 1000 kg speedboat to go from rest to 20.0 m/s in 5.00 s is 60000 Watts.

The average power required to accelerate an object is equal to the force required to overcome resistance multiplied by the velocity gained. In this case, the drag force fd opposes the acceleration of the speedboat, and so the net force on the boat is equal to the difference between the force applied to the boat and the drag force:

Fnet = Fapplied - fd = ma - fd

where m is the mass of the boat (1000 kg) and a is the acceleration. The acceleration can be calculated from the velocity gained and the time taken:

a = (vf - vi) / t = (20 m/s - 0 m/s) / 5.00 s = 4 m/s^2

So, the net force is:

Fnet = ma - fd = 1000 kg * 4 m/s^2 - 500 N = 3000 N

The power required to overcome the drag force and accelerate the speedboat is equal to the net force multiplied by the velocity gained:

P = Fnet * v = 3000 N * 20 m/s = 60000 Watts

Therefore, the average power required is 60000 Watts.

To know more about average power please refer:

https://brainly.com/question/17008088

#SPJ4

Unit vectors in three-dimensional space have certain properties that are useful in many applications, such as physics, engineering, and computer graphics. These properties include linear independence, orthogonality, and relationships between dot and cross products.

In three-dimensional space, unit vectors are vectors with a magnitude of 1. Therefore, the following statements are true:

1. Any two distinct unit vectors are linearly independent.

2. The cross product of any two distinct unit vectors is also a unit vector that is orthogonal to both.

3. The sum of any two unit vectors may or may not be a unit vector, depending on the angle between them.

4. The dot product of any two unit vectors is equal to the cosine of the angle between them.

In summary, unit vectors in three-dimensional space have certain properties that are useful in many applications, such as physics, engineering, and computer graphics. These properties include linear independence, orthogonality, and relationships between dot and cross products. Understanding these properties can help in solving problems involving vectors and three-dimensional geometry.

For more information on Unit vectors visit:

brainly.com/question/28028700

#SPJ11

The ocean conveyor belt is a global system of deep and surface ocean currents that circulate water around the world. It is driven by differences in water density, temperatures, and salinity.

Salinity is the measure of the amount of dissolved salts in a given volume of water. It is typically expressed as parts per thousand (ppt) or parts per million (ppm). Salinity can be found in most bodies of water, including oceans, rivers, and lakes. Salinity levels can vary greatly depending on the source of the water, the amount of rainfall, and other factors. In general, the higher the salinity, the more difficult it is for organisms to survive in the water. High salinity levels can also affect the taste and smell of the water, and can be an indicator of water pollution. Salinity can also be an important factor for many human activities, such as agriculture, industry, and navigation.

The ocean conveyor belt has a huge effect on coastal climates by transporting heat from the tropics to higher latitudes, where it is released into the atmosphere. This helps warm coastal climates, resulting in milder winters and cooler summers. It also helps to reduce the effects of extreme weather events such as droughts and floods, by moderating temperatures and redistributing moisture.

To learn more about salinity
https://brainly.com/question/30628264
#SPJ1

Answer:

$8640

Explanation:

kwh = P×t...................... Equation 1

Where P = power in watts, t = time in hours.

From the question,

Given: P = 100 Watts, t = 720 hours

Substitute these values into equation 1

Therefore,

The total kilowatt hour used by the patio light = 100×720

= 72000 kwh.

From the question,

If,  1 kwh ⇒ $0.12,

Then, 72000 kwh ⇒ $(0.12×72000)

= $8640

Hence, the patio light cost kevin $8640

Answer:

this is just and example of how to solve it

Explanation:

need brainliest

The velocity of the ball is 1 m/s which starts with a speed of 2.0 m/s and slows at a constant rate of 0.5 m/s².

According to the data given:

Speed of the ball: 2.0 m/s

Acceleration: 0.50 m/s²

Time is 2.0 s

The ball starts rolling up the hill with a speed of 2m/s (u=2 m/s²) and it decelerates at a constant rate of 0.5 m/s² (a = -0.5 m/s², minus because it decelerates).

The equation for calculating velocity is:

v = u + a x t,  t represents time here

So, ball's velocity after 2 seconds is:

v = 2m/s + (-0.5m/s² x 2s)

v = 2m/s + (-1m/s)

v = 1m/s

Learn more about acceleration:

brainly.com/question/28743430

#SPJ4

Answer:

25

Explanation:

I just did this

Answer:

I think it's how far out the water goes from the beach before the tsunami because before tsunami usually the water goes back way behind the tide before tsunami and that tells them everything they need I think