How much work is done by friction as the block crosses the rough spot?.

Answer:

The direction in which this object travels might be changing.

Explanation:

Velocity is a vector quantity. In addition to the rate at which this object moves, velocity also measures the direction of the motion.

In contrast, speed is a scalar quantity. The speed of an object also measure the rate at which this object moves. However, unlike velocity, speed does not account for the direction of the motion.

Hence, even if speed is constant, velocity of this object might not be constant as long as the direction of the motion is changing.

For example, consider an object moving around a circle at a constant rate. The speed of this object will be constant since the rate of the motion is constant. However, the velocity of this object will not be constant since the object needs to keep changing its direction to stay on the track.

Explanation:

Voltage is the pressure pushing electrons through a power circuit.   Express in volts

You can always search on go ogle to give you an easier answer.

Answer:

Density= 2.78 g/cm³

Relative density=2.8

Explanation:

To calculate the density of the cube we have to use the formula ρ=mass/volume

ρ stands for density.

So now we don't have the volume of the cube and to find the volume of the cube we have to use the formula a³

3³= 9 cm³

Now plug in the values. ρ= 25 g/9 cm³

ρ= 2.78 g/cm³

To find the relative density, we have to use the formula ρsample/ρH20

The sample means the density of the substance earlier. We do not know the density of water but it is constant at 997 kg/m³.

Now we have to make the units same so you change the unit of the density of cube to kg/m³

So, 25/1000= 0.025 kg

9/100×100×100 (because cm³ which means that there should be 3 meters to change the unit and to conver cm to meter we need to divide by 100 so 9cm/100, 9cm²/100×100, 9cm³/100×100×100)

=0.000009 m³

The new density= 0.025 kg/ 0.000009 m³

= 2777.78 kg/m³

Now plug the values into the formula:

relative density= 2.777.78 kg/m³ / 997 kg/m³

=2.8

There is no unit since kg/m³ and kg/m³ cancels

At a temperature of 2900 K, the wavelength at which the intensity of blackbody radiation is at a maximum is approximately 1000 nm.

The wavelength λm at which the intensity of blackbody radiation is at a maximum can be determined using Wien's displacement law. For a blackbody at a temperature of 2900 K, the wavelength λm will be calculated in nanometers to two significant figures.

Wien's displacement law states that the wavelength at which the intensity of blackbody radiation is at a maximum is inversely proportional to the temperature of the blackbody. Mathematically, this can be expressed as λm = b/T, where λm is the wavelength at maximum intensity, T is the temperature in Kelvin, and b is Wien's displacement constant.

To calculate the value of λm for a blackbody at 2900 K, we need to substitute the temperature into the equation. The value of Wien's displacement constant is approximately 2.898 × 10⁶ nm K. Using the formula, we get λm = (2.898 × 10⁶ nm K) / (2900 K). Evaluating this expression, we find λm ≈ 1000 nm.

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When the child jumps on the disk, the system's precise energy changes, torque and constrain applied by the pivot are true. The overall active vitality diminishes.

(a) The following statements are true:

These other statements are untrue:

(b) The greatness of the precise energy of the child some time recently the collision relative to the pivot is given by |C| = mvr, where m is the mass of the child, v is the speed of the child, and r is the radius of the disk. Stopping within the values, |C| = (16 kg) × (2.8 m/s) × (2.4 m) = 107.52 kg·m²/s.

(c) Fair after the collision, the precise force of the framework of the child also disk relative to the pivot is moderated and remains the same as sometime recently the collision. In this manner, the precise force is still |C| = 107.52 kg·m²/s.

(d) On the off chance that the disk was at first at rest, its introductory precise speed is zero. After the collision, precise force is preserved. Utilizing the equation for precise force (L = Iω) and the given moment of inactivity for a uniform disk (I = 1/2MR²), able to fathom the precise speed (ω):

107.52 kg·m²/s = (1/2)(50 kg)(2.4 m)² × ω

Understanding ω gives ω ≈ 0.893 radians/s.

(e) The time taken for the disk to create one total turn (go around once) is given by T = 2π/ω. Stopping within the esteem for ω, we have T = 2π/0.893 ≈ 7.03 seconds.

(f) The statement is deficient, and without assist data, it isn't enough to decide where most of the vitality has gone. The whole vitality of the framework may alter due to different components such as contact, dissipative powers, or the transformation of vitality into other shapes.

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Answer:

Doing so for too much longer can decrease oxygen flow to the brain, causing fainting, seizures and brain damage. In the heart, a lack of oxygen can cause abnormalities of rhythm and affect the pumping action of the heart.

(1) The angular velocity at position 1 of a uniform rod rotating freely around an axis can be determined.

(2) The velocity of the center of mass at position 2.

(1) To determine the angular velocity at position 1, we need to consider the conservation of angular momentum. Since the rod is rotating freely, there are no external torques acting on it.

The initial angular momentum is zero, and at position 1, the angular momentum is given by L = Iω, where I is the moment of inertia of the rod and ω is the angular velocity. By substituting the values of mass and length of the rod into the formula for moment of inertia, we can solve for ω.

(2) To calculate the velocity of the center of mass at position 2, relative to position 1 and at an angle theta, we can use the concept of angular velocity and linear velocity. The linear velocity of the center of mass is given by v = ωr, where ω is the angular velocity and r is the distance between the center of mass and the axis of rotation. By considering the given angle theta and the length of the rod, we can determine the distance r.

Substituting the value of ω calculated in part (1) into the formula, we can find the velocity of the center of mass at position 2, relative to position 1 and at angle theta.

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\(H_2\) (hydrogen) is not a compound because it's not made of more than one element. Yes we have more than one component, but both components are of the same element H.

Something like \(CO_2\) is a compound because it's made of carbon and oxygen (specifically 1 carbon and 2 oxygen), so we have at least two different elements here.

Explanation:

Formula:

F*255.92778=K

83 F *255.92778=301.48k

therefore the answer is:

301.48K

Your ideal heart rate for vigorous intensity physical activity should be between 77% and 93% of your maximum heart rate. here option A is correct.

You should feel like you can do the activity for a longer period of time while the intensity is still low. You can educate your body to exercise for extended periods of time in this zone, which is all about increasing your endurance. Active Intensity. In general, you won't be able to speak for more than a few words without pausing to take a breath if you're engaging in vigorous-intensity activities. Running, jogging, or race walking. The American Heart Association recommends working at 70 to 85 percent of your maximal heart rate for a vigorous activity. Running is an example of a rigorous workout. at least 10 mph when cycling. carrying a large bag while moving quickly uphill.

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\({ \purple{ \tt{Here \: is \: your \: answer...}}}\)

Umm it's quiet difficult to understand. But let us note down the given values.

\({ \green{ \tt{given : - }}}\)

\({ \red{ \tt{ λ = 5000 \times {10}^{ - 10} m}}}\)

\({ \red{ \tt{ λ = 5 \times {10}^{ - 7}m}}} \)

\({ \red{ \tt{ \beta = 0.6cm = 6 \times {10}^{ - 3} m}}}\)

\({ \red{ \tt{D' = \frac{D}{2}}}}\)

\({ \red{ \tt{ \beta' = 0.003m = 3 \times {10}^{ - 3}m}}}\)

Answer:

handle, trigger, spindle

The percentage of the lost kinetic energy of the car, at the midpoint of the skid, is 50%.

In physics, work is the measurement of the energy used to move objects. When you are walking, you're using energy to move your body so the work done would be greater than zero.

According to work-energy theorem, work is equal to force times displacement (W = F · x).

A type of energy is kinetic energy, which is the energy of a moving object. If an object is at rest, its kinetic energy is zero. Kinetic energy is equal to one half of a mass times velocity squared (KE = 0.5 · m · v²).

When a car goes into a skid and comes to a gradual stop, at the midpoint of the skid the car has spend 50% its kinetic energy. This is simply because the velocity of the car at the midpoint of the skid is half the velocity of the car when the car starts going into a skid, assuming constant acceleration.

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Answer:

P waves, or Primary waves, are the first waves to arrive at a seismograph. P waves are the fastest seismic waves and can move through solid and liquids

Explanation:

Answer:There are a lot of issues with deforestation. However, for some nations around the world, logging jobs provide stable sources of income that might otherwise be unavailable. But now new research is taking a deeper look into the consequences of logging and asking, at what cost?

So I narrow it down mostly to deforestation, cost , animal population, water resources and etc

Explanation:

Answer:

The size of an object is directly proportional to the gravity

Explanation:

The size of an object has significant impact on the gravity exerted by such a body.

The more massive a body is, the larger the gravity it exerts.

The reason for this is because of the newton's law of universal gravitation.

As you go higher and higher in the stratosphere, the temperature actually increases.

The stratosphere is a layer of Earth's atmosphere that lies above the troposphere and below the mesosphere. It starts at about 10 to 13 kilometers (6 to 8 miles) above the Earth's surface and extends up to approximately 50 kilometers (31 miles).

The stratosphere contains the ozone layer, which absorbs the sun's ultraviolet radiation and converts it into heat. The higher you go in the stratosphere, the more ozone there is, and the more heat is generated.

Therefore, the temperature increases as you go higher in the stratosphere. This is in contrast to the troposphere, the layer of the atmosphere closest to the Earth's surface, where the temperature decreases as you go higher.

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Answer:

i hope it helped U

stay safe stay happy

Answer:

b

Explanation:

I did this question earlier

Answer:

Explanation:

when a tree is shaken it's fruits and leaves fall down due to the gravitational force exerted by earth.

All fruits and leaves do not fall when tree is shaken, mostly only those fruits and leaves are fallen that are ripped.

It's because their tissues has become weak

Answer:

c. Y

Explanation:

Newton's third law of motion states that action and reaction are equal and opposite. Hence for every action, there is an equal and opposite reaction.

Considering the system of forces shown in the image, W and Y are  opposite forces. When the driver slams on the brakes, he will be pushed forward towards the windscreen. The force Y exerted by the seat belt keeps him on the drivers seat by moving him backwards towards the seat.

It looks like you're given

\(x(t) = -11\,\mathrm m + \left(1\dfrac{\rm m}{\rm s}\right) t - \left(5\dfrac{\rm m}{\mathrm s^3}\right) t^3\)

\(y(t) = 19\,\mathrm m + \left(3\dfrac{\rm m}{\rm s}\right) t - \left(9\dfrac{\rm m}{\mathrm s^2}\right) t^2\)

The particle's position vector at time \(t\) is given by

\(\vec r(t) = x(t)\,\vec\imath + y(t)\,\vec\jmath\)

Differentiate \(\vec r\) twice to recover the velocity and acceleration vectors.

\(\vec a(t) = \dfrac{d\vec v(t)}{dt} = \dfrac{d^2\vec r}{dt^2} = x''(t)\,\vec\imath + y''(t)\,\vec\jmath \\\\ \implies \vec v(t) = \left(1\dfrac{\rm m}{\rm s} - \left(15\dfrac{\rm m}{\mathrm s^3}\right) t^2\right)\,\vec\imath + \left(3\dfrac{\rm m}{\rm s} - \left(18\dfrac{\rm m}{\mathrm s^2}\right) t\right) \,\vec\jmath \\\\ \implies \vec a(t) = -\left(30\dfrac{\rm m}{\mathrm s^3}\right)t \, \vec\imath - \left(18\dfrac{\rm m}{\mathrm s^2}\right) \,\vec\jmath\)

At \(t=1.4\,\rm s\), the particle has acceleration

\(\vec a(1.4\,\mathrm s) = \left(-42\,\vec\imath - 18\,\vec\jmath) \dfrac{\rm m}{\mathrm s^2}\)

with magnitude

\(\|\vec a(1.4\,\mathrm s)\| = \sqrt{\left(-42\dfrac{\rm m}{\mathrm s^2}\right)^2 + \left(-18\dfrac{\rm m}{\mathrm s^2}\right)^2} \approx 45.695\dfrac{\rm m}{\mathrm s^2}\)

and making an angle \(\theta\) relative to the positive \(x\)-axis such that

\(\tan(\theta) = \dfrac{-18}{-42} = \dfrac37\)

Since both components of the acceleration vector have negative sign, the acceleration points into the third quadrant, so that we add a multiple of 180° after taking the inverse tangent of both sides, namely

\(\theta = \tan^{-1}\left(\dfrac37\right) - 180^\circ \approx -156.801^\circ\)

Now, (a) the magnitude of the net force acting on the particle is, by Newton's second law,

\(F = (0.41\,\mathrm{kg})\|\vec a(1.4\,\mathrm s)\| \approx \boxed{18.735\,\mathrm N}\)

and (b) makes the same angle as the acceleration vector, \(\theta \approx \boxed{-156.801^\circ}\).

At this moment, its velocity vector is

\(\vec v(1.4\,\mathrm s) = \left(-28.4\vec\imath - 22.2\,\vec\jmath\right) \dfrac{\rm m}{\rm s}\)

which (c) makes an angle \(\theta\) such that

\(\tan(\theta) = \dfrac{-22.2}{-28.4} = \dfrac{111}{142}\)

This vector also points in the third quadrant, so

\(\theta = \tan^{-1}\left(\dfrac{111}{142}\right) -180^\circ \approx \boxed{-142.986^\circ}\)

We will either die cause with no gravity then we cant breathe or we may die due to the fact were in space or maybe be frozen due to the fact we will be 500k feet up air

The final speed of object A will be twice the final speed of object B since both objects have the same acceleration, but object A accelerates for a longer duration.

Since objects A and B start at rest and accelerate at the same rate, the end speed is simply proportional to acceleration duration.

Let B accelerate for "t" units. Object A accelerates for "2t" units.

The final speed of an item can be calculated using the equations of motion: v = u + at, where "v" is the final velocity, "u" is the initial velocity (zero in this case), "a" is the acceleration, and "t" is the acceleration time.

A and B have identical accelerations. Thus, object A's final velocity, vA, is 2at = (0) + a(2t).

Object B's final velocity, vB, is (0) + a(t) = at.

The final speed of item A (2at) is twice that of object B (at). Thus, A's final speed is twice B's.

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Answer:

160 m

Explanation:

For computing the distance first we have to determine the acceleration which is shown below:

v = u + at

where,

v = 0 = initial velocity

u = 40 = uniformly to a speed

t = 8 = time

So, the a is

= 40 ÷ 8

= 5 m/s

Now we have to use the distance formula i.e

d = ut + 1 ÷ 2 at^2

= 1 ÷2 × 5 × 8^2

= 160 m

Basically we have to applied the above formulas so that the distance could come

Answer:

By pointing one's right thumb along the direction of the current, the direction of the magnetic field can by found by curving one's fingers around the wire. The strength of the magnetic field depends on the current I in the wire and r, the distance from the wire.

The comparison between the distance traveled by the bullet compared with the distance traveled by the rifle at the same time shows that the bullet travels faster than the rifle due to greater acceleration.

Newtown's third law of motion states that for every action there is a reaction having equal magnitude but opposite direction.

In the case of bullet and rifle, both experience the same amount of force that is equal in magnitude but opposite in direction.

In physics, mass and acceleration have an indirect relation with each other i.e a = F/m. More mass means less acceleration and vice versa.

A rifle has a smaller amount of acceleration than a bullet. It is because the mass of the rifle is greater than the bullet therefore it covers less distance a s compare to a bullet having less mass and greater acceleration and thus travels faster.

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The correct order of increasing impedance is:

C. PZT, gel, skin, matching layer

Impedance is a measure of the opposition to the flow of sound waves in a medium. It depends on the density and speed of sound in the material. In the given options, the order of increasing impedance can be determined by considering the properties of the materials involved.

PZT (lead zirconate titanate) has a higher impedance than gel, skin, and the matching layer. PZT is a piezoelectric material commonly used in ultrasound transducers and has a higher density and speed of sound, leading to higher impedance.

Gel has a lower impedance compared to PZT but higher impedance than skin and the matching layer. Gel is used as a coupling medium between the transducer and the skin to enhance acoustic coupling and minimize impedance mismatch.

Skin has a lower impedance than both gel and the matching layer. It is the outermost layer and acts as an interface between the transducer and the biological tissue.

The matching layer has the lowest impedance among the given options. It is designed to match the impedance of the PZT to the impedance of the tissue being imaged, facilitating efficient sound transmission.

Therefore, the correct order is C.

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109.539 yards far has the rocket traveled horizontally (since it was launched) at this point in time.

In arithmetic, the slope or gradient of a line is quite a number that describes each path and the steepness of the road. The slope is frequently denoted through the letter m; there is no clear answer to the question of why the letter m is used for slope, however its earliest use in English appears in O'Brien (1844)who wrote the equation of an instant line as "y = MX + b" and it could also be discovered in Todhunter (1888) who wrote it as "y = MX + c".

This generalization of the idea of the slope allows very complicated buildings to be planned and built that pass nicely past static systems which might be either horizontals or verticals but can change in time, flow in curves, and alternate depending on the rate of alternate different factors. Thereby, the simple concept of the slope will become one of the fundamental basis of the current world in phrases of each era and the built surroundings. The slope of a line within the aircraft containing the x and y axes is normally represented via the letter m and is defined because the change inside the y coordinate is divided through the corresponding exchange within the x coordinate, between distinct factors on the road.

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