A positively charged insulating rod is brought close to an object that is suspended by a string. If the object is repelled away from the rod we can conclude:

Answer:

yes

Explanation:

banked curve :

is a road that looks like the top part of a race track

its looks elevated

often seen in bicycle race track (velodrome)

Banking the curve can help keep cars from skidding. When the curve is banked, the centripetal force can be supplied by the horizontal component of the normal force.

sfuca

Answer:

frequency = 0.5 /s

speed = 2m/s

Explanation:

frequency = 1/period = 1/2 = 0.5 /s

speed = frequency × wavelength

= 0.5 × 4 = 2m/s

7.26 x 10-5 rad/sec

The angle of one rotation is 2π. The time required for this rotation is 24 hours to calculate the angular speed of the Earth as it rotates completely around its own axis. Average Angular Velocity Wav is the average rate of change of angular displacement.

On converting the hours into seconds we get,

Time = 24 hr x 60 min/hr x 60 sec/min = 86400 sec

The angular speed is given by the formula, ω = θ /t.

after substituting the value given in the equation we get,

ω = 2π / 86400 Seconds

ω = 0.0000726 radians/sec = 7.26 x 10-5 rad/sec

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360 degrees per 24 hours

It is possible to distinguish between these types of radiation by the use of an electrostatic field.

A radioactive source is a source that emits radiation such as alpha, beta and gamma radiation. We can be able to distinguish between these types of radiation by the use of an electrostatic field.

The gamma rays is undeflated by the field, the alpha ray is deflated to the negative part of the field while the beta rays is deflated by the positive part of the field.

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Answer:

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It moved from 3 cm to 6 cm with constant speed of 3 cm/s.This statement correctly describes the motion of the object.

An object is said to be in motion , when its position changes with respect to its surroundings area and time.

Object's moves from 3 cm to 10 cm with a constant speed of 2 cm/s

let us check

time = 7 sec

distance = 10 - 3 = 7 seconds

speed = distance / time = 7/7 = 1 m/s

incorrect option

Object's moves from 0 cm to 6 cm with an average speed of 1 cm/s.

distance = 6 cm

time = 7.5 sec

speed = 6/7.5 = 0.8 m/s

incorrect option

Object's moves from 0 cm to 10 cm at an average speed of 2 cm/s.

distance = 10 cm

time = 9 sec

speed = 10 / 9 = 1.11 m/s

incorrect option

Object's moves from 3 cm to 6 cm at a constant speed of 3 cm/s.

distance = 6-3 = 3 cm

time = 7.5 - 6.5 = 1 sec

speed = 3 /1 = 3 m/s

correct option D. object moved from 3 cm to 6 cm with a constant speed of 3 cm/s.

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Answer:

To show that magnets repel, you must place the strong and weak magnets to another magnet with their poles being both south or both north facing eachother.

To show they attract, place opposite poles near eachother.

Answer:

Speed of wave = 2.5 m/s

Explanation:

Given:

Time taken by wave = 6 second

Height (Distance) of wave = 15 meter

Find:

Speed of wave

Computation:

⇒ Speed = Distance / Time taken

⇒ Speed of wave = Height (Distance) of wave / Time taken by wave

⇒ Speed of wave = 15 / 6

Speed of wave = 2.5 m/s

220-dc motor powered by a 5.3 ohm armature whose resistance is running at its operating speed the series resistance would be necessary to keep the initial current under 20 A

Distance travelled in a unit of time is referred to as speed. It is the rate of movement of an object. Speed is a scalar quantity and the velocity vector's magnitude. There is no clear direction to it. An object is travelling more quickly if its speed is higher. Slower motion is indicated by a lower speed. In simple words, we define speed or velocity as the distance travelled in a specific amount of time. If an automobile is driving faster if its speed is higher. A slow vehicle has less speed, as we say. if an object moves quickly.

Req = R + r = 2 + r

Req = V/I2 + 2 + r = 220/30 60 + 30 r = 220 30 r = 160 r = 5.3 ohm

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Answer:

i think the answer is #3. :)

The one-dimensional diffusion equation or Fick's second law is the name of this equation. For the geographically and temporally variable concentration, it is solvable.

A diffusion explanation is what?

The movement of molecules along a concentration gradient is known as diffusion. It is a significant process that all living things go through. Diffusion facilitates the flow of materials into and out of cells.

Which definition of diffusion is the best?

Diffusion is the movement of molecules from a region where they are more concentrated to one where they are less concentrated. Therefore, "Movement of molecules from a region of their greater concentration to a region of their lower concentration" is the right response.

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The mass equivalent, in kg, of an energy of 2,800,000 J released at a speed of 3.0 x 10^8 m/s is approximately 0.0 kg. This result is not physically meaningful and may indicate an error in the calculation or the given values.

The mass-energy equivalence is given by Einstein's famous equation:

E = mc^2

where E is the energy, m is the mass, and c is the speed of light.

We can rearrange this equation to solve for m:

m = E / c^2

Substituting the given values, we have:

m = 2,800,000 J / (3.0 x 10^8 m/s)^2

m = 2,800,000 J / 9.0 x 10^16 m^2/s^2

m = 3.111 x 10^-8 kg

Rounding this to the nearest tenth, we get:

m ≈ 0.0 kg

Mass equivalent refers to the concept in physics that mass and energy are equivalent and interchangeable, as expressed in Albert Einstein's famous equation E=mc². This equation shows that the energy (E) of an object is equal to its mass (m) times the speed of light squared (c²). In other words, energy and mass are two forms of the same thing, and a certain amount of energy can be converted into an equivalent amount of mass, and vice versa. This concept is important in many areas of physics, including nuclear physics and particle physics.

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Answer:

Initial speed of stone = 12.25 m/s

Explanation:

Given:

Change in distance = 0.15 m

Force applied = 28 N

Find:

Initial speed of stone

Computation:

Using conservation of energy

(1/2)fs² = (1/2)(mv²)

fs² = (mv²)

(28)(0.15)² = (0.028)(v²)

v² = (28)(0.15)²/(0.028)

v = 12.25

Initial speed of stone = 12.25 m/s

Answer: drying paint

Explanation:

From the options that are given in the question, we should note that car manufacturers use radiation for drying paint.

The radiation is vital as it keeps the car cool and also helps in the reduction if heat in the vehicle. The other options such as sealing windows, cleaning tires and lubricating engines aren't true as radiation isn't used for that purpose by the car manufacturers.

Answer:

drying paint

Explanation:

The correct answer is $243

Explanation:

The hole in the fence is 3 meters, this means it is necessary to buy wood that covers this distance. Now, each meter is equal to 100 centimeters, this means 3 meters is equivalent to 300 centimeters ( 100 cm in each meter x 3). Besides this, it is known each plank covers 20cm and costs $16.20. In this context, the next step is to find how many planks are needed. The process is shown below:

300 cm (total width) ÷ 20 cm (width of 1 plank) = 15 planks

This means 15 planks are needed. Finally, fin the total cost

15 planks x $16.20 (cost of 1 plan) = $243

The pressure exerted by light on a mirror located at the same distance from the source, assuming normal incidence and total reflection is very small, approximately 10^-5 pascals.

When light is incident on a surface, it exerts a radiation pressure that is equal to the power of the light divided by the speed of light. This pressure is very small for everyday objects, but it can be significant for objects with very low mass, such as mirrors. In the case of a mirror that is perpendicular to the incident light, all of the light is reflected back in the opposite direction. This means that the total force on the mirror is twice the radiation pressure, but since the pressure is so small, the force is also very small. Therefore, the pressure exerted by light on a mirror located at the same distance from the source, assuming normal incidence and total reflection is approximately 10^-5 pascals.

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To use all the energy from consuming a small order of french fries, the person would need to climb the 11.0 m stairway approximately 17.0 times.

The energy content of the small order of french fries is given as 241.0 Cal. We can convert this value to joules since the unit of energy in the metric system is the joule (J). 1 calorie (Cal) is equal to 4.184 joules (J). To use all the energy from consuming a small order of french fries, the person would need to climb the 11.0 m stairway approximately 57 times.

Energy content of the small order of french fries:

241.0 Cal × 4.184 J/Cal = 1007.144 J

Work done to climb the stairway:

(55.0 kg) × (11.0 m) × (9.8 m/s²) = 59294 J

Number of climbs needed to use all the energy:

1007.144 J ÷ 59294 J ≈ 17.0

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Answer:

Ionic and covalent bonding produce compounds, while hydrogen bonding and Van der Waals forces join separate molecules together.

Ur welcome:)

Answer:

C) lonic and covalent bonding produce compounds, while hydrogen bonding and Van der Waals forces join separate molecules together.

Explanation:

The percentage uncertainty in the momentum of the electron is approximately 6.18%.

To calculate the percentage uncertainty in the momentum of an electron, we can use the uncertainty principle, which states that the product of the uncertainties in position (Δx) and momentum (Δp) must be greater than or equal to the reduced Planck's constant (h-bar, ħ), which is h divided by 2π:

Δx Δp ≥ ħ/2π

Given that the position uncertainty (Δx) is 0.1 nm (1 nm = 1 × 10⁻⁹ m) and the electron momentum (p) is 1.7 × 10⁻²³ kg·m/s, and using the value of Planck's constant (h = 6.62 × 10⁻³⁴ J·s), we can calculate the uncertainty in momentum (Δp) and then find the percentage uncertainty.

First, let's convert the position uncertainty to meters:

Δx = 0.1 nm = 0.1 × 10⁹ m

Now, rearranging the uncertainty principle equation to solve for Δp:

Δp ≥ ħ / (2πΔx)

Substituting the known values:

Δp ≥ (6.62 × 10⁻³⁴ J·s) / (2π × 0.1 × 10⁻⁹ m)

Δp ≥ 1.05 × 10⁻²⁴ kg·m/s

The uncertainty in momentum (Δp) is at least 1.05 × 10⁻²⁴ kg·m/s.

To calculate the percentage uncertainty, we can use the formula:

Percentage uncertainty = (Δp / p) × 100

Substituting the values:

Percentage uncertainty = (1.05 × 10⁻³⁴ kg·m/s) / (1.7 × 10⁻²³ kg·m/s) × 100

Percentage uncertainty ≈ 6.18%

Therefore, the percentage uncertainty in the momentum of the electron is approximately 6.18%.

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Answer:

here's an explanation but not the answer

please kindly send No or Yes understand.

Explanation:

A 10-N force is applied to push a block across a friction free surface for a displacement of 5.0 m to the right.

See Answer

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A 10-N frictional force slows a moving block to a stop after a displacement of 5.0 m to the right.

Answer:

also tripled, factor of 3

Explanation:

equation of momentum is p = m * v , where p=momentum, m=mass, and v=velocity

if m is unchanged

p1 = m1 *v1

p2 = m2 *v2

m1 = m2 and v2 = 3*v1

p2 = m1 * 3v1 = 3*p1, tripled momentum

Acceleration = (force) / (mass)

Acceleration = (6.81 x 10⁻³ N) / (252 kg)

Acceleration = 2.70 x 10⁻⁵ m/s²

Time = (change in v) / (acceleration)

Time = (262 m/s) / (2.70 x 10⁻⁵ m/s²)

Time = 9,703,704 seconds

That's  2,695.5 hours , or  112.3 mean solar Earth days .

Considering the coordinates of the radars as well as the direction of the object in order to determine the object's position in terms of distance and angle. Sincе thе radars arе situatеd at (0,0) and thе sеcond radar is on thе еast sidе of thе first onе, wе can assumе that thе first radar is locatеd on thе x-pivot and thе sеcond radar is locatеd on thе positivе y-hub.

Lеt's say thе objеct is dеtеctеd at coordinatеs (x, y). The objесt's y-coordinativity will be negative and its x-coordinativity positive as it approaches the southern direction in the first quadrant.

We can use the distancе formula to determine the object's diameter from its origin (0, 0):

Distancée = (x + y) 2 The angle can be calculated with trigonometry. The angle can be summarized as:

= arctan(y/x) ii) We must consider the circles of overlap for each radar in order to calculate the overlap from the radar signal intersection in the first quadrant.

Due to the fact that both radars have distinctive overlap and divide the covered area into circles, the overlapped area will be the intersection of these circles.

Thе ovеrlapping arеa can bе calculatеd by finding thе arеa of thе intеrsеction of two circlеs. The formula for the area of the intersection of two circles can be complex and depends on the specific radii and dimensions that exist between the circles' centers.

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Answer:

Thus, ocean currents regulate global climate, helping to counteract the uneven distribution of solar radiation reaching Earth's surface. Without currents in the ocean, regional temperatures would be more extreme—super hot at the equator and frigid toward the poles—and much less of Earth's land would be habitable.

Answer:

85.8 m/s

Explanation:

We know that the length of the circular path, L the plane travels is

L = rθ where r = radius of path and θ = angle covered

Now,its speed , v = dL/dt = drθ/dt = rdθ/dt + θdr/dt

where dθ/dt = ω = angular speed = v'/r where v' = maximum speed of plane and r = radius of circular path

Now, from θ = θ₀ + ωt where θ₀ = 0 rad, ω = angular speed  and t = time,

θ = θ₀ + ωt = 0 + ωt = ωt

So, v = rdθ/dt + θdr/dt

v = rω + ωtdr/dt

v = (r + tdr/dt)ω

v = (r + tdr/dt)v'/r

v = v' + tv'/r(dr/dt)

v = v'[1 + t(dr/dt)/r]

Given that v' = 110 m/s, t = 33.0s, r = 120 m and dr/dt = rate at which line is shortened = -0.80 m/s (negative since it is decreasing)

So, v = 110 m/s[1 + 33.0 s(-0.80 m/s)/120 m]

v = 110 m/s[1 + 11.0 s(-0.80 m/s)/40 m]

v = 110 m/s[1 + 11.0 s(-0.02/s)]

v = 110 m/s[1 - 0.22]

v = 110 m/s(0.78)

v = 85.8 m/s

The wavelength of microwave radiation is 187.5×10⁸ Hz, and a single photon of electromagnetic radiation has an energy of 6.62 1034 (187.5

×10⁸)

The number of waves that pass through a specific spot in a unit of time is known as the frequency of a wave. It may be expressed as,

Here, the wave's wavelength () and speed (c) are both given.

The wavelength of microwave radiation is around 1.6 cm, or 0.016 m. Since the average speed of light is 3×10⁸ m/s. Hence, its regular occurrence,

f =  3×10⁸ The number of waves that pass through a specific spot in a unit of time is known as the frequency of a wave. It may be expressed as,

f = 187.5×10⁸

Now the energy of the photon is given as,

E = hf

E = 6.62 × 10 raise to -34 (187.5 ×10⁸)

Hence, the frequency of the wavelength of microwave radiation is  Hz f = 187.5×10⁸ and the energy of a single photon of this radiation is E = 6.62 × 10 raise to -34 (187.5 ×10⁸) J.

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Answer:

HEAR WE CAN SAY THAT VEGITERIAN INVOKE THE SECOND LOW OF THERMODYNAMICS

Explanation:

According to the second law, entropy always rises in closed systems. Let's use the growing of a leaf as an example. The sun emits low-entropy radiation that the leaf absorbs and then emits higher-entropy radiation into its surroundings. The leaf is encouraged to reduce its own entropy in order to sustain the overall process's required increase in entropy as a result of this significant entropy increase. Using this illustration, we can draw the conclusion that living things adhere to the second law of thermodynamics.

second law of thermodynamics

A process that exchanges or transfers heat can result in a certain amount of useful work, according to the second law of thermodynamics.

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Positive interference occurs when the crests of two waves cross. The picture on above shows what happens.

As the waves pass through one another, their crests combine to form a wave with a greater amplitude. When two troughs come into contact, the same thing may happen. Constructive interference happens where the lines—which represent the peaks—cross one another. In other words, when two waves are in phase, constructive interference happens. Destructive interference results when two waves are completely out of phase (a peak is situated in the center of two waves). Wave interference occurs when two waves collide while traveling through the same medium.

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