A boat travels north at a rate of 25.0 kilometers per hour (km/hr) relative to the current of the river. The current of the river moves south at a rate of 10.0 km/hr relative to the ground. What is the rate of motion of the boat relative to the ground?

Answer:

Pam's velocity when she crosses the finish line is 10 m/s.

Explanation:

Given;

initial velocity of Pam, u = 3.3 m/s

acceleration of Pam, a = 3 m/s²

last distance covered, d = 15 m

let her final velocity = v

Apply the following kinematic equation to determine Pam's final velocity;

v² = u² + 2ad

v² = 3.3²   + 2(3)(15)

v² = 10.89   +  90

v² = 100.89

v = √100.89

v = 10 m/s

Therefore, Pam's velocity when she crosses the finish line is 10 m/s.

Negative zero error describes the situation in which the vernier caliper's jaws are just closed as well as the reading deviates in the negative direction from the true reading of 0.00 mm.

The dial, digital, layout & spring, and vernier subcategories of calipers are the main ones. External measurements are taken by all four categories. The inside, step, and depth measurements are handled by others. Four-way calipers are also referred as calipers that can measure each type of quantity.

The n-1 divide on the main scale corresponds to the width n division of the graduations on the vernier scale, which is the basis for the vernier calliper. Vernier scales typically have a division count of 10.

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The displacement of the pendulum is 0.815 m.

Mass of the pendulum, m = 25 kg

Length of the pendulum, l = 0.75 m

Distance moved by the pendulum, x = 0.25 m

Therefore, acceleration of the pendulum,

a = -(g/l) x   the negative sign implies the restoring force.

a = -(9.8/0.75) 0.25

a = -3.26 m/s²

Time period of the pendulum = 2 s

Angular frequency, ω = 2\(\pi\)/T

ω = 2 x 3.14/2

ω = 2 s⁻¹

Displacement,

x' = -(a/ω²)

x' = 3.26/4

x' = 0.815 m

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Answer:

Cells make up tissues, tissues make up organs, and organs make up organ systems. ... organisms have specialized systems that maintain the internal environment, ... the different organ systems as though they were distinct, parts of one system

Explanation:

By listening for it underwater, using SONAR.

Hope this helped!

(a) False. If a car is traveling east, its acceleration must be eastward is the wrong statement.

(b) True. If a car is slowing down, its acceleration may be positive right statement.

(c) True.  An object with constant nonzero acceleration can never stop and stay stopped is right statement.

The pace at which speed changes is known as acceleration. Acceleration typically, but not always, indicates a change in speed. Because the direction of an object's velocity is shifting even while it follows a circular course, it continues to accelerate.

The negative acceleration would suggest a slowing of the object if it is moving eastward (has positive velocity).

As a result, accelerating a moving vehicle forward is a positive acceleration, while reversing it is a negative acceleration.

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True. Steam that is produced from a boiling pool of water will initially be saturated steam.

Saturated steam is a state where the steam and liquid water coexist in equilibrium at a given temperature and pressure. When water is heated, it undergoes a phase transition from liquid to vapor. At the boiling point of water, the temperature and pressure conditions are such that the liquid water converts into steam.

During the boiling process, the heat supplied to the water causes its temperature to rise until it reaches the boiling point. At this point, further heat input does not cause a temperature increase but instead converts the liquid water into steam. The steam produced at the boiling point is known as saturated steam.

Saturated steam contains the maximum amount of moisture it can hold at a given temperature and pressure. It is in equilibrium with liquid water, and any further addition or removal of heat will result in a change in the steam's quality or condition (e.g., superheated steam or wet steam).

Therefore, initially, the steam produced from a boiling pool of water will be saturated steam.

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The amount of energy required to heat 600 g of iron from 25°C to 60°C is 8.61 kJ.

The amount of energy required to heat 600 g of iron from 25°C to 60°C can be calculated using the formula:

Q = mcΔT

where Q is the amount of energy (in joules), m is the mass of the iron (in grams), c is the specific heat of iron (in J/g°C), and ΔT is the change in temperature (in °C).

Substituting the given values, we get:

Q = (600 g)(0.41 J/g°C)(60°C - 25°C)

Q = (600 g)(0.41 J/g°C)(35°C)

Q = 8610 J or 8.61 kJ (to three significant figures)

As a result, the amount of energy necessary to heat 600 g of iron from 25°C to 60°C is 8.61 kJ.

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Answer:

√(0.7 * 9.81m/s^2 * r)

Explanation:

To determine the maximum speed at which the 800kg car can travel around the curve, the engineer needs to consider the forces acting on the car as it goes around the curve. Specifically, the engineer needs to consider the centrifugal force and the frictional force between the wheels and the road.

The centrifugal force is the force that acts on an object moving in a circular path and is directed away from the center of the circle. It is given by the equation Fc = mv^2 / r, where m is the mass of the object, v is the velocity of the object, and r is the radius of the curve.

The frictional force between the wheels and the road is given by the equation Ff = μFn, where Ff is the frictional force, μ is the coefficient of friction between the wheels and the road, and Fn is the normal force between the wheels and the road. The normal force is the force that acts perpendicular to the surface of the road and is equal in magnitude to the weight of the car (mg, where g is the acceleration due to gravity).

The maximum speed at which the car can travel around the curve occurs when the centrifugal force and the frictional force are in balance, meaning that they have the same magnitude. In this case, we can set Fc = Ff and solve for v.

Substituting the given values into the equations for Fc and Ff and setting them equal to each other, we get:

Fc = Ff

mv^2 / r = μmg

Solving for v, we find that the maximum speed at which the car can travel around the curve is:

v = √(μgr)

= √(0.7 * 9.81m/s^2 * r)

This is the maximum speed at which the car can travel around the curve without sliding or losing traction. The actual value of v will depend on the radius of the curve, which is not given in the problem.

Answer:

Potential, tell me if that's wrong, and sorry if its wrong.

Explanation:

Based on the time difference between the P-wave and S-wave arrivals on the seismogram, the approximate distance from the seismic station to the earthquake epicenter is calculated to be 70 kilometers. However, the given answer choices do not match this distance.

To calculate the distance to the earthquake epicenter using the given seismogram, we need to determine the time difference between the P-wave and S-wave arrivals. Let's assume we have the following information:

P-wave arrival time: tP

S-wave arrival time: tS

Calculate the time difference between the P-wave and S-wave arrivals:

Time Difference = tS - tP

Determine the average wave velocity for P-waves and S-waves in the specific geological region. Let's assume the velocities are:

P-wave velocity: VP

S-wave velocity: VS

Calculate the distance to the epicenter using the formula:

Distance = (Time Difference) * (P-wave velocity)

Note: Since S-waves travel slower than P-waves, we use the P-wave velocity to calculate the distance.

Let's assume the given seismogram provides the following values:

P-wave arrival time: tP = 10 seconds

S-wave arrival time: tS = 30 seconds

P-wave velocity: VP = 5 km/s

Calculate the time difference:

Time Difference = tS - tP

= 30 s - 10 s

= 20 seconds

Assume the P-wave velocity:

P-wave velocity: VP = 5 km/s

Calculate the distance to the epicenter:

Distance = (Time Difference) * (P-wave velocity)

= 20 s * 5 km/s

= 100 km

Therefore, based on the given information, the approximate distance from the seismic station to the earthquake epicenter is 100 kilometers.

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The difference in time between the sound waves being detected at the other end of the plank and the sound being heard through the air will be 0.09 sec.

A sound wave is produced when a medium begins to vibrate. When an entity vibrates, a pressure wave is formed, which causes sound.

Given data;

The speed of sound in wood,u= 3300 m/s

The speed of sound in air,v=330 m/sec

long plank of wood, L=33 m

The time period in the air was found as;

T₁ = 33 m / 330 m/sec

T₁= 0.1 sec

The time period in wood ;

T₂= 33 m / 3300 m/sec

T₂=0.01 sec

T = T₁ - T₂

T=0.1-0.01

T=0.09 sec

Hence, the difference in time between the sound waves being detected at the other end of the plank and the sound being heard through the air will be 0.09 sec.

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Answer:

I guess B

Explanation:

Because it stop by it self so that is digital

These rules are described by specific examples of the ideal gas formula, PV = nRT, the new volume of nitrogen is approximately 23.2 L.

The chemical industry needs nitrogen to function. It's utilized in the production of explosives, nylon, colors, nitric acid, and fertilizers. The Haber process carries this out.

The atmosphere is the principal single source of nitrogen. An odorless, colorless, harmless gas, which makes up 78% of it, is present in it. Although nitrogen is present in the atmosphere, plants cannot utilize it.

The problem can be solved using Boyle's law, which states that the pressure and volume of a gas are inversely proportional at constant temperature. Mathematically, Boyle's law can be expressed as:

P1V1 = P2V2

where P1 and V1 are the initial pressure and volume, respectively, and P2 and V2 are the final pressure and volume, respectively.

We are given that the initial volume, V1, is 22.5 L, the initial pressure, P1, is 748 mmHg, and the final pressure, P2, is 725 mmHg. We can use Boyle's law to find the final volume, V2:

P1V1 = P2V2

748 mmHg x 22.5 L = 725 mmHg x V2

V2 = (748 mmHg x 22.5 L) / 725 mmHg

V2 ≈ 23.2 L

Therefore, the new volume is approximately 23.2 L.

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Answer:

B.

Hope this helps

When a snowball turns into a puddle of water, we know that (the snow ball gains energy and changes from a solid to liquid).

This is correct due to the fact that particles of the snowball are gaining speed and so it is heating up, when the solid's temperature reaches the melting point, it will become a liquid.

Therefore, D is the correct answer.

Thermal insulation reduces unwanted heat loss and also reduces unwanted heat gain.

Insulation creates a barrier between the hot and the cold object by reducing heat transfer by either reflecting light radiation.

Insulating materials are bad conductors of electricity and heat. So, insulating reduces the heat loss via conduction.

Thermal energy is prevented to increase the temperature of building in summers and decrease in winters. The thermal energy transfer plays vital role in insulating a building.

Thus Thermal insulation reduces unwanted heat loss and also reduces unwanted heat gain.

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The beams 2 and 4 reflect, while the beams 3 and 5 refractively bend. The coefficient of reflection of a substance rises steadily from top to bottom.

A beam seems to be a part of the structure that defies loads mainly applied horizontally to its axis (an element designed to carry primarily axial load would be a strut or column). Its primary method of displacement is bending. Reaction pressures are produced at the beam's bearing locations as a consequence of the loads placed on it.

In order to transmit the burden to a vertical load carrying part of the building, beams are used to carry the weight of the building's levels, ceilings, and rooftops.

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The displacement of Curiosity is 2.334 m

The given parameter:

maximum speed of Curiosity, v = 0.14 km/hr

time of motion of Curiosity = 60 s

To find:

The displacement of Curiosity is calculated as follows;

The displacement of Curiosity = speed x time

The displacement of Curiosity = 0.0389 m/s x 60 s

The displacement of Curiosity = 2.334 m

Thus, the displacement of Curiosity is 2.334 m

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A 5,560 kg lander (weight does not include fuel) must travel to the surface of the moon and back, requiring a delta-v (change in speed) of 18.7 kilometers per second. If the specific impulse (exhaust velocity, ve) of the rocket is 4.13 kilometers per second, approximately 4,683 kg of fuel will be necessary for the lander to travel to the surface of the moon and back.

According to the Rocket Equation, the amount of fuel necessary can be calculated using the formula:

m_fuel = m0 × (1 - e^(-Δv / ve)),

where:

m_fuel is the mass of the fuel required,

m0 is the initial total mass of the lander (including fuel),

Δv is the change in velocity (delta-v) required for the mission,

ve is the exhaust velocity (specific impulse) of the rocket.

In this case, we have:

m0 = 5,560 kg,

Δv = 18.7 km/s,

ve = 4.13 km/s.

Substituting the given values into the equation, we can calculate the mass of the fuel required:

m_fuel = 5,560 kg × (1 - e^(-18.7 km/s / 4.13 km/s)).

Using a calculator or a mathematical software, we find:

m_fuel ≈ 4,683 kg.

Therefore, approximately 4,683 kg of fuel will be necessary for the lander to travel to the surface of the moon and back, considering the given values for the initial mass, delta-v, and specific impulse.

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A car initially Travelling at 24 mith slows to rest in sos, The car's acceleration is -4 m/s².

To determine the car's acceleration, we can use the equation of motion:

v² = u² + 2as

where:

v = final velocity (0 m/s, since the car comes to rest)

u = initial velocity (24 m/s)

a = acceleration (unknown)

s = displacement (unknown)

Rearranging the equation, we have:

a = (v² - u²) / (2s)

Since v = 0 and u = 24 m/s, the equation becomes:

a = (0 - 24²) / (2s)

To find the value of s, we need to use the equation of motion:

s = ut + (1/2)at²

Given that t = 5 seconds, we have:

s = 24(5) + (1/2)(-4)(5²)

s = 120 - 50

s = 70 meters

Now we can substitute the values into the initial equation to calculate the acceleration:

a = (0 - 24²) / (2 * 70)

a = -576 / 140

a ≈ -4 m/s²

Therefore, the car's acceleration is approximately -4 m/s², indicating that it decelerates at a rate of 4 m/s². The negative sign indicates that the acceleration is in the opposite direction of the initial velocity.

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A football workout involves two linemen who are pushing on the coach and the sled. The sled and the coach's combined mass is 300 kg, while the coefficient of friction between the sled and the grass is .800. The sled accelerates at a rate of .580 m/s/s. We need to determine the force applied to the sled by the linemen.

The total force acting on the sled is:Force = Mass × AccelerationF = 300 kg × .580 m/s/s = 174 NSince the sled and the grass's coefficient of friction are known, we can determine the force applied to the sled by the linemen using the following equation:

Frictional Force = Coefficient of Friction × Normal Force

The normal force is equal to the weight of the sled and the coach. Thus,Normal Force = Mass × GravityN = 300 kg × 9.81 m/s/s = 2943 NFrictional Force = .800 × 2943 N = 2354.4 NThe force applied to the sled by the linemen is the difference between the total force acting on the sled and the frictional force.

Force Applied by Linemen = Total Force − Frictional ForceF = 174 N − 2354.4 N = −2180.4 NThe linemen are exerting a force of −2180.4 N on the sled in the opposite direction to the sled's movement. This is because the frictional force is greater than the total force acting on the sled.

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Answer:

a 15.6voltz

i Hope this helps

The part of electromagnetic spectrum lying between the ultraviolet region and the gamma ray region is x-rays.

The smallest known wavelengths and greatest frequency are found in gamma rays. They are the most piercing waves because they have high energy and can travel great lengths through air. X-rays have shorter wavelengths than UV radiation, but longer wavelengths than gamma radiation, making them more energetic.

The electromagnetic energy known as ultraviolet has a frequency of 30 PHz to 750 THz and a wavelength of 10 nm to 400 nm. These particles have wavelengths that are both shorter than visible light and longer than X-rays.

Thus, the x-ray area of the electromagnetic spectrum is located between the ultraviolet and gamma ray regions.

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Answer:

\( \huge{ \boxed{44 \: \: \text{inches}}}\)

Explanation:

To find the perimeter of the rectangle, we must first find the width of the rectangle given it's length and area then use it to find the perimeter of the rectangle.

Let the width be represented by w

Area of a rectangle = length × width

From the question.

Area = 105 sq. in

length = 7 in

\(105 = 7 \times w \\ 105 = 7w \: \: \: \: \: \: \\ \\ \frac{105}{7} = \frac{7w}{7} \\ w = 15\)

width = 15 in

Perimeter of a rectangle(p) = 2l + 2w

l is the length of the rectangle

w is the width of the rectangle

\(p = 2(7) + 2(15) \\ p = 14 + 30 \\ \\ p = 44\)

We have the final answer as

Explanation:

is this the full question?

Answer:

1258.46

Explanation:

Acellus

Answer:

C voltage

Explanation:

Voltage is the change in electric potential so basically current flows from high potential to low potential due to voltage.

This golfer is demonstrating Kinetic energy.

Kinetic energy is the force that an object has as a result of its movement. If we want to speed up an object, we must apply force to it. Using force demands us to put in the effort. After work is completed, energy is transferred toward the entity, and the object moves at a new consistent speed.

Kinetic energy describes the energy of movements, which can be seen as an entity or subatomic particle moving. Kinetic energy exists in every moving vehicle and particle. Kinetic energy is demonstrated by a woman walking, a crumb falling from a table and a charged atom in an electric field.

Kinetic energy is the energy held by a moving object. As we've seen, kinetic increases as mass and/or speed increase, and KE remains constant unless an object accelerates or decelerates. Kinetic energy is classified into two types: translational energy is converted into kinetic and angular momentum energy.

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