Flashing red and yellow lights control some intersections.

Answer:

3 rad/s

Explanation:

The relative angular velocity is the relative tangential velocity divided by the distance.

ω = (va − vb) / r

ω = (10 sin 30° m/s − -20 cos 60° m/s) / (5 m)

ω = (5 m/s + 10 m/s) / (5 m)

ω = 3 rad/s

The total number of charges moved to power up the light for 20 min is 3.75 x 10¹⁹

The voltage of the battery = 1.50 V
The power supplied by the battery = 0.45 W

The flashlight will glow for 20 min

The total number of charges moved during the flashing of the flashlight can be found using the formula,

              I = P/V
where I is the current

          P is the power

          V is the voltage supplied

We also know that,

            I = Q/t

Let us substitute this equation, with the above equation, and we get

           Q = Pt/V

Now, let us substitute the known values in the above equation, we get

           Q = 0.45 x 20 / 1.50

              = 9 / 1.50

              = 6 C

Then, the number of charges is

            n = Q/e

where e is the charge of an electron

            n = 6 / 1.6 x 10⁻¹⁹

               = 3.75 x 10¹⁹

Therefore, the number of charges moved is 3.75 x 10¹⁹

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The net force on a crate sliding at an unchanging speed when pushed with a steady force of 75 n is zero.

The total of all forces exerted on an object is known as the net force. A mass can accelerate due to net force. A body is subject to another force whether it is at rest or in motion. When there are a lot of forces acting on a system, the term "net force" is employed.

The total force acting on an object is its net force. Newton's second law, which states that F = ma, where F represents the net force, can be used to compute the net force. The object's mass is given by m. Acceleration is a.

The vector sum of all forces acting on an object is known as the net force. As a result of the fact that a force is a vector and that two forces with identical magnitudes and opposing directions cancel each other out, the net force is the sum of all the forces, or put another way, the net force is the sum of all the forces.

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ANSWER:

Distance = 9 km

Displacement = 9 km east

STEP-BY-STEP EXPLANATION:

When we speak of distance we refer to the length between any two points in space, while displacement refers to the distance from an initial position to a final position regardless of the path.

In this case, being in the same direction, the displacement and distance are the same (in magnitude).

Therefore:

Explanation:

If you dropped particles of different shapes from a boat into still water, they would fall straight down due to the force of gravity. The speed at which they fall would depend on their mass and the shape of the particles could affect how they move through the water, but ultimately they would all sink to the bottom of the water body. If the particles are buoyant, they may float instead of sinking.

Answer:

They will crash with the force of 6,000N

Explanation:

Force is equal to mass time acceleration. When we multiply 200 kg, the mass, and 30 m/s2, the acceleration, the answer is 6,000.

Relativistic quantum mechanics and nonrelativistic quantum mechanics are two different approaches to describing the behavior of particles at the quantum level. The main difference between the two is the consideration of special relativity in relativistic quantum mechanics, whereas nonrelativistic quantum mechanics only accounts for classical mechanics.

Nonrelativistic quantum mechanics applies to particles moving at relatively low speeds and is based on the Schrödinger equation, which describes the wave function of a particle. This approach does not consider the effects of time dilation or length contraction that arise in special relativity.

Relativistic quantum mechanics, on the other hand, takes into account the effects of special relativity, which is important when considering high-speed particles. This approach uses the Dirac equation, which describes the behavior of particles with spin. It also considers the fact that particles can be created and destroyed, which is not accounted for in nonrelativistic quantum mechanics.

Relativistic quantum mechanics is a more complete theory that takes into account the effects of special relativity, while nonrelativistic quantum mechanics is a simpler theory that is useful for describing the behavior of particles at low speeds.
The main difference between relativistic and nonrelativistic quantum mechanics lies in the incorporation of Einstein's special theory of relativity. Nonrelativistic quantum mechanics, often represented by Schrödinger's equation, works well for describing particles at low velocities compared to the speed of light. However, it does not account for relativistic effects that become significant at high velocities.

Relativistic quantum mechanics, on the other hand, takes into account the effects of special relativity. This is typically represented by the Klein-Gordon equation for scalar particles and the Dirac equation for particles with spin-½, like electrons. These equations accurately describe particle behavior at high velocities and incorporate the speed of light as a fundamental limit in the equations.

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Answer:2.5m

Explanation:

Approximately 0.26724 kilojoules (kJ) of nonconservative work was done on the boy.

To calculate the nonconservative work done on the boy, we can use the work-energy principle, which states that the net work done on an object is equal to its change in kinetic energy.

The initial kinetic energy (KE_i) of the boy is given by:

KE_i = 0.5 * m * v_i^2

where m is the mass of the boy and v_i is the initial speed.

Given:

Mass of the boy, m = 66.8 kg

Initial speed, v_i = 1.60 m/s

KE_i = 0.5 * 66.8 kg * (1.60 m/s)^2

The final kinetic energy (KE_f) of the boy is given by:

KE_f = 0.5 * m * v_f^2

where v_f is the final speed.

Given:

Final speed, v_f = 8.51 m/s

KE_f = 0.5 * 66.8 kg * (8.51 m/s)^2

The change in kinetic energy (ΔKE) is given by:

ΔKE = KE_f - KE_i

ΔKE = (0.5 * 66.8 kg * (8.51 m/s)^2) - (0.5 * 66.8 kg * (1.60 m/s)^2)

The nonconservative work (W_nc) done on the boy is equal to the change in kinetic energy:

W_nc = ΔKE

Now, to convert the result to kilojoules (kJ), we divide by 1000:

W_nc = ΔKE / 1000

Calculating the value:

W_nc = (0.5 * 66.8 kg * (8.51 m/s)^2) - (0.5 * 66.8 kg * (1.60 m/s)^2) / 1000

W_nc ≈ 267.24 J / 1000

W_nc ≈ 0.26724 kJ

Therefore, approximately 0.26724 kilojoules (kJ) of nonconservative work was done on the boy.

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An ideal Carnot engine has an efficiency of 83.0% and performs 4500 J of work every cycle. The energy that is discharged to the lower temperature reservoir every cycles 920J.

The efficiency of an ideal Carnot engine is given by:
efficiency = 1 - (T_cold/T_hot) where T_cold is the temperature of the lower temperature reservoir and T_hot is the temperature of the higher temperature reservoir. From the given efficiency of 83%, we can write:
0.83 = 1 - (T_cold/T_hot). Rearranging this equation, we get:
T_cold/T_hot = 0.17. The ratio of the temperatures is 0.17.Let the energy discharged to the lower temperature reservoir every cycle be Q_cold. The work done by the engine every cycle is 4500 J.
According to the first law of thermodynamics:
Q_hot - Q_cold = 4500 J where Q_hot is the energy absorbed from the higher temperature reservoir every cycle. Using the equation for the ratio of temperatures, we can write:
Q_cold/Q_hot = 0.17.
Rearranging this equation, we get:
Q_cold = 0.17 Q_hot
Substituting this into the first law equation, we get:
Q_hot - 0.17Q_hot = 4500 J.
Simplifying this equation, we get:
0.83Q_hot = 4500 JQ_hot = 4500 J/0.83 = 5421.69 J.
Therefore, the energy discharged to the lower temperature reservoir every cycle is:Q_cold = 0.17Q_hot = 0.17(5421.69 J) ≈ 920 J.

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Answer:

this ans is 42.85

Explanation:

i dont not explain but i hipe you get it

Answer:

135N will cause a 45 kg object to accelerate at a rate of 3.0 m/s2

Explanation:

Force = mass * acceleration

Force = 45 kg * 3 m/s2

Force = 135N

Force=F

Apply Newton's second law

\(\\ \tt\longmapsto F=ma\)

\(\\ \tt\longmapsto F=45(3)\)

\(\\ \tt\longmapsto F=135N\)

Answer:

G.) The number atoms of that element in the molecule

Explanation:

F is incorrect because the coefficient represents the amount of one type of molecule, not the subscript

G is correct because subscripts represent how many atoms of that element are present in that single molecule

H is incorrect because energy is not represented in this simple type of equation

J is incorrect because it doesn't even make sense

Angle between \(\vec{A}\) and \(\vec{B}\) is 150° .

Now read the question .

The resultant of both vectors is perpendicular to \(\vec{B}\)

Look at the attachment

Angle between resultant and vector A be \(\theta\)

Let's use maths

\(\\ \sf\longmapsto \theta+90°=150°\)

\(\\ \sf\longmapsto \theta=150-90\)

\(\\ \sf\longmapsto \theta=60°\)

Answer:

Hope it will help you a lot.

Answer:

\(m_h=0.2\)

Explanation:

Using the heat formula and concept of calorimetry to answer this problem.

\(\boxed{\left\begin{array}{ccc}\text{\underline{Formula for Heat:}}\\\\Q=mc\Delta T\end{array}\right}\)

\(\boxed{\left\begin{array}{ccc}\text{\underline{Calorimetry (Energy Conservation):}}\\Q_{gain}+Q_{lose}=0\end{array}\right}\)

Given:

\(T_{0_{h}}=100 \textdegree C\\T_{0_{c}}=0 \textdegree C\\T_{f}=40 \textdegree C\\m_c=300 \ g \rightarrow 0.3 \ kg\\c_w=4200 \ \frac{J}{kg\textdegree C}\)

Find:

\(m_h= \ ?? \ kg\)

(1) - Identify what is gaining heat and what is losing heat and form an equation

The cold water is gaining heat from the added hot water, which means the hot water is losing heat.

\(Q_{gain}=m_cc_w(T_f-T_{0_{c}})\\\\Q_{lose}=m_hc_w(T_f-T_{0_{h}})\\\\\therefore \boxed{m_cc_w(T_f-T_{0_{c}})+m_hc_w(T_f-T_{0_{h}})=0}\)

(2) - Plug the known values into the equation and solve for the unknown "m_h"

\(m_cc_w(T_f-T_{0_{c}})+m_hc_w(T_f-T_{0_{h}})=0\\\\\Longrightarrow (0.3)(4200)(40-0)+m_h(4200)(40-100)=0\\\\\Longrightarrow (0.3)(40)-m_h(60)=0\\\\\Longrightarrow m_h(60)=(0.3)(40)\\\\\therefore \boxed{\boxed{m_h=0.2 \ kg}}\)

Thus, the mass of the hot water is found.

Answer:

5000°A

Explanation:

If it is right answer so please mark me as brainleist anwer as ur wish

Answer:

heat

Explanation:

Answer:

F = 2.8 =16N

Explanation:

At the basement level, the water pressure is 104.1 kPa.

The mass flow rate, Av, through a pipe of cross-sectional area A and fluid density is constant, according to the continuity equation. Therefore:

ρ1A1v1 = ρ2A2v2

where the two distinct places in the pipe are indicated by the subscripts 1 and 2. Upon solving for v2, we obtain:

v2 = (ρ1A1v1) / (ρ2A2)

We can determine the cross-sectional areas since we are aware of the internal diameters of the pipe at both points:

A2 = (1.5 cm)2 / 4 = 1.7671 cm2, while A1 = (0.8 cm)2 / 4 = 0.5027 cm2.

We also know that water has a density of around 1000 kg/m3, or 1 g/cm3. The diameter and speed in the query are converted to SI units as follows:

v1 = 0.85 m/s h = 7.0 m

All these values are entered into the v2 equation, and the result is:

v2 = (1 g/cm^3 * 0.5027 v2 = 0.122 m/s (1 g/cm3 * 1.7671 cm2) / (1 g/cm2 * 0.85 m/s)

The speed in the basement is thus 0.122 m/s.

b. The pressure, velocity, and height of a fluid moving through a pipe are related by the Bernoulli equation. The equation may be expressed as follows, assuming that friction does not result in energy loss:

P1 plus (1/2)v1 plus gh1 equals P2 plus (1/2)v2 plus gh2.

where g is the acceleration caused by gravity, v is speed, h is height, and P is pressure. Upon solving for P2, we obtain:

P2 = P1 + (1/2)ρv1^2 - (1/2)ρv2^2 - ρgh

Inputting the values we are familiar with yields:

h = 7.0 m, P1 = 174 kPa, v1 = 0.85 m/s, and v2 = 0.122 m/s

We had determined that water has a density of 1 g/cm3. When all the units are converted to SI units, we obtain: P2 = 174 kPa + (1/2) 1000 kg/m3 times 0.85 m/s divided by 1/2 equals 0.122 m/s.2 - 1000 kg/m3 x 9.81 m/s x m/s x m

P2 = 104.1 kPa

As a result, the basement level's water pressure is 104.1 kPa.

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The acceleration of the tanker aircraft will remain the same, since the thrust of the engine is kept constant.

option C is the correct answer.

Thrust is the power or force that is required to make a vehicle or aircraft move in a particular direction.

According to Newton's second law of motion, the force applied on an object is directly proportional to the product of mass and acceleration of the object.

Mathematically, Newton's second law of motion is given as;

F = ma

where;

a = F/m

When the thrust of the engine is kept constant, then the force applied by the engine is constant.

a = F1/m = F2/m

F1 = F2, since the thrust of the engine kept constant.

Hence, the acceleration of the tanker aircraft will be constant.

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Answer:

The change in time for the first quarter is  seconds.  = 2.07

The change in time for the second quarter is  seconds.

=1.09

The change in time for the third quarter is  seconds.

=0.95

The change in time for the fourth quarter is  seconds.=0.81

Explanation:

Hope this helped.

Time required by the light to get to the earth from the moon is 0.00101 seconds.

Average distance between moon and the sun is 3.84 x 10^5 m.

As we know that, light is an electromagnet wave, it does not requires a medium to travel, so it will travel with the speed of 3.8 x 10^8 m/s.

Hereby, it is known to us that,  

Speed = Distance/Time.

Time required by the light to travel from moon to the earth can be find by using,

Time = Distance/Speed

Time = 3.84x10^5/3.8x10^8

Time = 1.01 x 10^-3

Time = 0.00101 seconds.

As the speed of light taken was already in unit of Meter per second. So, the answer will be in seconds.

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After time 2t, the wheel with constant angular acceleration will have turned through an angle of 100 rad (Option D).

Let's analyze the problem step by step. The given information states that the wheel starts from rest and undergoes a constant angular acceleration. We need to find the angle it will have turned after time 2t.

The formula to calculate the angle turned by a rotating object with constant angular acceleration is given by θ = ω₀t + (1/2)αt², where θ is the angle turned, ω₀ is the initial angular velocity, α is the angular acceleration, and t is the time.

In this case, the wheel starts from rest, so the initial angular velocity ω₀ is 0. The angle turned after time t is given as 25 rad, which means θ = 25 rad, and we need to find the angle turned after time 2t.

Plugging the given values into the formula, we have 25 rad = (1/2)αt². Solving for α, we find α = (50 rad) / t².

Now, we can use this value of α to find the angle turned after time 2t. Plugging α and t into the formula, we get θ = (1/2)(50 rad / t²)(2t)² = 100 rad.

Therefore, after time 2t, the wheel with constant angular acceleration will have turned through an angle of 100 rad (Option D).

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Peak wavelength of the object is 6.49 µm.

Peak wavelength is the wavelength at which the line is brightest.

Temperature of the object = 172°c

Temperature in kelvin = 172 + 273 = 445 K

λmax = 2.89 * \(10^{-3}\) / T

λmax =2.89 * \(10^{-3}\) / 445

λmax = 6.49 *   \(10^{-6}\) m

λmax = 6.49 µm

The peak wavelength of the radiation emitted by the object at temperature 172°c is 6.49 µm.

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a) The number of turns in the solenoid is approximately 206.

To determine the number of turns in the solenoid, we can use the formula for the magnetic field inside a solenoid, which is given by B = μ₀nI, where B is the magnetic field, μ₀ is the permeability of free space, n is the number of turns per unit length, and I is the current.

Rearranging the formula, we have n = B / (μ₀I). Substituting the given values of B = 9.00 T and I = 75.0 A, and using the value of μ₀, we can calculate the number of turns per unit length. Multiplying it by the length of the solenoid (0.500 m) gives us the total number of turns in the solenoid, which is approximately 206.

A solenoid is a coil of wire wound in a helical shape. When a current flows through the coils, it creates a magnetic field along the axis of the solenoid. The strength of the magnetic field depends on factors such as the number of turns per unit length and the current flowing through the solenoid.

In this case, we are given the magnetic field and current, and we use the formula for the magnetic field inside a solenoid to calculate the number of turns. The higher the number of turns, the stronger the magnetic field generated by the solenoid.

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Answer:

Explanation:

A galvanometer which is used for the measurement of a very small current can be converted to a voltmeter when it is connected to a high resistance or a multiplier is a series. The purpose of this is to reduce the amount of current that goes through the galvanometer so as prevent full scale deflection.

Answer: the answer is b “The warmer a region of the atmosphere is, the more infared radiation it emits”

Explanation:

Answer:

a

Explanation:

i got it right

looking at the graph,

1) Displacement includes direction

Displacement from 8s to 16s = 15 - 6 = 9

Displacement fbetween 16s and 24s = 0 - 15 = - 15

Displacemet between 8s and 24s = 9 - 15

Displacemet between 8s and 24s = - 6m

2)

Distance does not include direction

from 8s to 16s,

distance travelled = 15 - 6 = 9 m

From 16s to 24s,

distance travelled = 15 - 0 = 15

Total distance between 8s and 24s = 9 + 15

Total distance between 8s and 24s = 24 m