a school bus moves at 2.3 m/s as it pulls away from a bus stop. what speed of the bus 20s later, after it's speed has increased by 5.425 m/s. express your answer in meters per second.​

Answer:

a) 0.01s

b) 100Hz

Explanation:

Period is defined as the time taken by a wave to complete 1 oscillation.

Since the object completes 2500 cycles in 25secs, we can write

2500cycles = 25secs

1 cycle = x

Cross multiply

2500x = 25

x = 25/2500

x = 0.01secs

Hence the period of its rotation is 0.01secs

b)  is the reciprocal of the period

Frequency = 1/Period

Frequency = 1/0.01

Frequency = 100Hertz

Hence the frequency of rotation is 100Hz

Answer:

Given: V = 220V, Pmin = 360W, Pmax = 840W

For minimum heating case:

We know that

Pmin = VI

360 = 220 X I

I = 1.63 amp

R = V/I

R = 220/1.63

R = 134.96ohms

For maximum heating case:

We know that

Pmax = VI

840 = 220 X I

I = 3.81 amp

R = V/I

R = 220/3.81

R = 57.74 ohms

Answer:

To make carrying the loads easier

Answer:

It's convenient and easy to rove a traveller's bag when it has wheels. You could easily drag the bag without hesitation instead of lifting it or pushing it heavily.

Answer:

Answer:

What languages do i sqeak?

English, Korean and Filipino

Uhh why are you asking it?

The flux is 0.0118 Wb. The flux through the annular region is 2.26×\(10^{-6\)

(a) The magnetic field at the center of the solenoid is given by the formula B = μ₀nI, where μ₀ is the permeability of free space, n is the number of turns per unit length, and I is the current. Thus, the magnetic field at the center of the solenoid is:

B = μ₀nI = (4π×\(10^{-7\) T·m/A)(300/0.3 m)(12.0 A) = 1.51 T

The flux through the disk-shaped area can be calculated as Φ = BA, where A is the area of the disk. The area of the disk is A = π\(R^2\) = π(0.050 \(m)^2\)= 0.00785 \(m^2\). Thus, the flux is:

Φ = BA = (1.51 T)(0.00785 \(m^2\)) = 0.0118 Wb

(b) The flux through the annular region can be calculated as the difference in flux between two concentric circles, one with radius b and the other with radius a. The magnetic field at a point on the axis of the solenoid a distance z from the center is given by the formula B = μ₀nIz/(2R), where R is the radius of the solenoid. Thus, the magnetic field at the inner and outer radii of the annular region are:

B_a = μ₀nIa/(2R) = \((4π×10^{-7} T·m/A)(300/0.3 m)(12.0 A)(0.004 m)/(2×0.0125 m) = 2.40×10^{-3 }T\)

B_b = μ₀nIb/(2R) = \((4π×10^{-7} T·m/A)(300/0.3 m)(12.0 A)(0.008 m)/(2×0.0125 m) = 4.79×10^{-3} T\)

The flux through the annular region is then:

Φ = π(\(b^2 - a^2\))B = π(0.0008 m^2 - 0.00016 \(m^2\))(4.79×\(10^{-3\)T - 2.40×\(10^{-3\) T) = 2.26×\(10^{-6\)Wb.

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The partial pressure and percentage of sea-level oxygen at the top of a lab can be calculated using the concept of Dalton's Law of Partial Pressures. First, let's understand what partial pressure means. In a mixture of gases, each gas exerts a pressure that is proportional to its concentration.

The partial pressure of a gas is the pressure it would exert if it occupied the entire volume alone. To calculate the partial pressure of oxygen at the top of a lab, we need to know the percentage of oxygen in the air at sea level. The percentage of oxygen at sea level is approximately 21%. Now, to calculate the partial pressure at the top of the lab, we need to know the total atmospheric pressure at that height.  

Partial Pressure of Oxygen = Percentage of Oxygen * Total Atmospheric Pressur The  partial pressure of oxygen at the top of the lab would be 0.21 * P. Please note that the exact value of the total atmospheric pressure at the top of the lab is needed to provide a specific answer. Additionally, this is a simplified explanation of the concept, and there may be other factors to consider in a more detailed analysis.

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Answer:

The overall charge on the wall is zero.

Explanation:

Because the atoms making the wall are neutral i.e. number of positive charges are equal to number of negative charges.

The slope of the force-versus-acceleration graph represents the mass of the system according to Newton's second law of motion. In an ideal experimental setup, the measured slope should match the actual mass of the object being tested.

The physical quantity represented by the slope of the force-versus-acceleration graph is mass. According to Newton's second law of motion, force is equal to mass multiplied by acceleration (F = ma). Therefore, the slope of the graph gives us the mass of the object being measured. In terms of the experimental setup, the slope of the force-versus-acceleration graph should match the mass of the object being tested. If the experiment is conducted accurately and the force and acceleration measurements are precise, the slope of the graph should correspond to the actual mass of the object. However, it's important to note that experimental uncertainties, measurement errors, and external factors can introduce discrepancies between the expected slope and the actual measured slope. Careful calibration and control of experimental conditions are necessary to ensure accurate results.

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Answer: Weak nuclear forces are involved when certain types of atoms break down. Strong nuclear forces are responsible for holding atoms' nucleus together.

Answer:

3 meters

Explanation:

add up dum boi

The specific heat of the substance will be 0.129 J/g°C.

The amount of heat required to increase a substance's temperature by one degree Celsius is known as specific heat capacity.

Similarly, heat capacity is the relationship between the amount of energy delivered to a substance and the increase in temperature that results.

The given data in the problem is;

Q is the amount of energy necessary to raise the temperature = 3,000.0 j

M is the mass=  0.465 kg.

Δt is the time it takes to raise the temperature.=50°c

s stands for specific heat capacity=?

Mathematically specific heat capacity is given by;

\(\rm Q= MC \triangle t \\\\ C = \frac{Q}{M\triangle t} \\\\ C = \frac{3000}{0.465 \triangle 50} \\\\ C =129.0 J/Kg^0C \\\\ C= 0.129 J/g^0C\)

Hence the specific heat of the substance will be 0.129 J/g°C.

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The amount of work done in this situation is 606 kJ when a system gains 782 kj of heat, resulting in a change in internal energy of the system equal to 176 kj

When a system gains 782 kJ of heat and undergoes a change in internal energy of 176 kJ, the work done can be calculated as follows: W = Q - ΔU

Equation for work done, Where W = Work done, Q = Heat energy ΔU = Change in internal energy of the system

Therefore, Substitute the given values in the above equation. W = 782 kJ - 176 kJW = 606 kJ

Therefore, the amount of work done is 606 kJ.

In 100 words, when a system gains heat, its internal energy changes, which causes a change in the amount of work done. The equation for the work done is W = Q - ΔU. Where W is the work done, Q is the heat energy, and ΔU is the change in internal energy of the system.

In the given problem, a system gains 782 kJ of heat, resulting in a change in internal energy of 176 kJ. Using the formula, W = Q - ΔU, we can calculate the work done to be 606 kJ. Therefore, the amount of work done in this situation is 606 kJ.

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Answer:

"correlated positively*  one doesn't know any move than that

The weight of the block so that a force of 7.1 n can push both the block and the weight together with a constant velocity is (7.1μ - w) N.

To find out the weight w of the block when a weight w is placed on the block and 7.1 N is required to push them both at a constant velocity, the following solution should be used:

We know that, In the given problem statement, the force required to push both blocks is equal to 7.1 N.

So, Net Force = 7.1 N

Let the weight of the block is W N.

Net Force = (W + w) μ

Where μ is the coefficient of friction.

Therefore,

7.1 = (W+w)μ

W = (7.1μ - w) N

Weight of the block = (7.1μ - w) N

Weight of the block = (7.1μ - w) N (Approx)

Therefore, the weight w of the block when a weight w is placed on the block and (7.1μ - w) N is required to push them both at constant velocity is 0.7244 N.

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Answer:

Red

Orange

Yellow

Green

Blue

Indigo

Violet

shortest wavelength: violet (380 nanometers)

¯\(°_o)/¯

Answer:

Red    Orange    Yellow    Green   Blue   Indigo    Violet

violet has the shortest wavelength

happy to help :)

Answer:

F_A =5.625*10^1^6N

Explanation:

From the question we are told that

50,000 years ago,

A giant 4.5 107-kg meteor

180-m-deep hole

20,000 m/s

Generally for this problem the energy change is given as

\triangle E=\frac{1}{2} mv^2 +mgd△E=

2

1

mv

2

+mgd

Having the potential and kinetic energy in place

Mathematically solving for Average forceF_AF

A

\triangle E=F_a*d△E=F

a

∗d

F_A =\frac{1/2* 4.5*10^7(20,000)^2-kg+4.5*10^7*9.81*160}{160}F

A

=

160

1/2∗4.5∗10

7

(20,000)

2

−kg+4.5∗10

7

∗9.81∗160

Therefore Average force F_AF

A

is given by

F_A =5.625*10^1^6N

Weight and mass are not directly proportional to each other. Weight and mass are two different physical quantities. The given statement is false

Mass refers to the amount of matter an object contains, while weight is the force exerted on an object due to gravity. The relationship between weight and mass is given by the equation F = mg, where F represents weight, m represents mass, and g represents the acceleration due to gravity.

This equation shows that weight is proportional to mass but also depends on the acceleration due to gravity. Therefore, weight and mass are indirectly proportional to each other, as the weight of an object changes with the strength of gravity but the mass remains constant.

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Answer:

1) 50 km/h

2)80/9 m/s

Explanation:

Speed = Distance / time

Answer:

A motion map can represent the position, velocity, and acceleration of an object at various clock readings. ... The corresponding motion map has the points spaced farther apart (because the car would go a further distance in each second), and the velocity vectors (arrows) are longer, because the car is moving faster.

Explanation:

Answer:

that one i know only pe not that sorry again

(1) The wavelength of the wave is 1.57 m.

(2) The velocity of the wave is 30 m/s .

(3) The frequency of the wave is 19.10 Hz and the time period of the    wave is 0.052 s.

Note: The given equation seems to be incomplete. Most probably the equation was y=25sin(120t-4x). And the standard system of units (i.e. kg, m, s) is used.

Wavelength: The distance between the consecutive crest or trough of a wave is called the wavelength of a wave.

The equation of a plane wave oscillating in the y direction and traveling in the x direction is given by the equation,

y=A sin(ωt-kx)

where y is the displacement along the y direction, A is the amplitude of the wave, ω is the angular frequency, t is the time, x is the displacement along the x direction, and k is the wave constant.

The given equation is,

y=25sin(120t-4x)

Comparing this equation with the above equation, following values are obtained.

k= 4 m^(-1)

ω =120 rad/s

A=25

The wavelength λ is given by the formula,

λ=2π/k

Here k = 4 m^(-1), so

λ=2π/4

λ=1.57 m.

Velocity: The velocity of a wave is the product of the frequency and the wavelength.

The velocity v is given by the formula,

v=ω*λ/2π

Here ω=120 rad/s and λ=1.57 m, so

v=120*1.57/2π

v=30 m/s

Frequency: The number of oscillations completed in one second is called the frequency of a wave.

The formula of the frequency is,

f=v/λ

Here v=30 m/s and λ=1.57 m, so

f=30/1.57

f=19.10 Hz

Time period: The time taken to complete one cycle of oscillation is called the time period of oscillation.

The formula to calculate the time period T is,

T=2π/ω

Here ω=120 rad/s, so

T=2π/120

T=0.052 s.

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Answer:

Who are the people for you then I can help you format the essay

Explanation:

It will take 8.9 seconds before Lilly coasts to a stop.

A measure of the degree of friction between two surfaces is the coefficient of friction. A coefficient of friction is determined by calculating the resistance to motion at the intersection of two surfaces made of the same or different materials.

In the question we are given,

Mass, m = 45 kg

initial speed, u = 7 m/s

final speed, v = 0

coefficient of friction, μ = 0.08

Now, friction force can be calculated by

F = Normal force × μ

F = mg×μ

F = 45×9.8×0.08

F = 35.2 N

since the net force is the frictional force we can calculate the deceleration,

F = ma

35.2 = 45a

a = 35.2/45 = 0.78 m/s²

by applying equation of motion,

v = u + at

0 = 7 - 0.78t

7 = 0.78t

t = 8.9 s

It will take 8.9 seconds before Lilly coasts to a stop.

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The complete question is;

Lilly, whos mass is 45.0 kg, is ice skating with a constant speed of 7.00 m/s when she hits a rough patch of ice with a coefficient of friction of 0.0800. How long will it take before Lilly coasts to a stop?

Answer:

Acceleration would be \(1.96\) times the initial value.

Explanation:

The vehicle is in a centripetal motion as it rounds the circular curve. Acceleration of the vehicle during the motion would be:

\(\displaystyle a = \frac{v^{2}}{r}\),

Where:

In this question, \(r\) stays the same since the vehicle is rounding the same curve. Acceleration of the vehicle would be proportional to the square of velocity.

The new velocity of the vehicle is \((70 / 50)\) times the original one. Hence, the new acceleration would be \((70 / 50)^{2} = 1.96\) times the original value.

Answer:

7.35 seconds

Explanation:

The computation of the time passed prior to the ball reached to the highest point is as follows;

As we know that the acceleration because of gravity on earth is 9.8 m/s

As the ball is thrown directly in an upward direction with a speed of 72 m/s

So, the time passed prior to the ball reached to the highest point is

= 72 ÷ 9.8

= 7.35 seconds

Hence, the above represents the answer