in the Pollowing figures the horizontal surface on which this block slides is frictionless . if the two Forces acting on
each have magnitude F= 30. №
10.kg What is the magnitude
of the resulting acceleration of the block

The number of people you will stack to reach the top of the CN Tower (553 m) is 316 people

We'll begin by converting 175 cm to m. This can be obtained as illustrated below:

100 cm = 1 m

Therefore,

175 cm = (175 cm × 1 m) / 100 cm

175 cm = 1.75 m

Thus, 175 cm is equivalent to 1.75 m

The number of people needed to be stacked to get to the top of the CN tower can be o btained asfollow:

Number of people needed = Height of tower / height of a person

Number of people needed = 553 / 1.75

Number of people needed = 316 people

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Answer:

8.362m/s

Explanation:

Given data

Mass m1= 7.77kg

Velocity v1= 7.77m/s

Mass m2= 8.88kg

Velocity v2= 8.88m/s

Apply the law of conservation of momentum for inelastic collision we have

m1v1+m2v2= (m+m2)V

7.77*7.77+ 8.88*8.88= (7.77+8.88)V

60.3729+78.8544= 16.65V

139.2273= 16.65V

Divide both sides by 16.65

V= 139.2273/16.65

V= 8.362m/s

Hence the final velocity is 8.362m/s

E =+823.12N/C is the electric field at point P

Each point in space has an electric field associated with it when a charge of any kind is present. The value of E, often known as the electric field strength, electric field intensity, or just the electric field, expresses the strength and direction of the electric field. in the diagram, q1 = +6.39*10^-9 C and

q2 = +3.22*10^-9 C hence E = 823.12 N/C

A region of space surrounding andd P Include a + or - sign toindicate the direction.P910.424 m-0.636 m- electrically charged particle or object known as an electric field is one in which an electric charge would experience force. A vector quantity called an electric field can be represented by arrows pointing in the direction of or away from charges. The force per unit charge exerted on a positive test charge that is at rest at a given position is the force per unit charge that is used to define the electric field analytically.

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1. because A is more negative than B. A is -1000 V (we can imagine that A has excess 1000 electrons), in other, B which +3000 V can be assume that B need 3000 elctrons to be neutral. So, the electron will flow from A to B.

2. Electrons being negatively charged flow from the negative terminal to the positive terminal of the voltage source. So, the actual direction of current should be from negative to positive terminal. However, the conventional direction had already been established. So, the current flow is considered in the direction opposite to the direction of flow of electrons. (from topperlearning dot com)

The statement best describes the primary difference between scientific investigation and technological design is Scientific investigation involves experiments, and technological design involves products. Option D

It can be said that both scientific investigation and technolgical design require problem-solving, creativity, and rigorous methods.

However, both of them have different objectives. While Scientific investigation seeks to expand knowledge and understanding of the natural world. Research involvs hypothesis testing and different experiments;

on the other hand, Technological design, wants to create or improve products, processes, or systems to meet specific needs or solve particular problems.

It can then be defined as the application of scientific knowledge for practical purposes.

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Answer:

The driver does not do it. The acceleration must be greater than 9.0m/s² in order to beat the time of 4.5s. The acceleration must be calculated using the equation a = (d/t)², where a is the acceleration, d is the distance, and t is the time. In this case, a = (100/4.5)², which is equal to approximately 27.78m/s². Therefore, the acceleration must be greater than 27.78m/s² in order to beat the time of 4.5s.

Explanation:

Answer:

Force = 63.27 Newton

Explanation:

Given the following data;

Weight = 0.62 kN = 0.62 * 1000 = 620 N

Acceleration = 1 m/s²

To find the magnitude of the force of the elevator floor on the person;

First of all, we would determine the mass of the elevator;

Weight = mass * acceleration due to gravity

We know that acceleration due to gravity is equal to 9.8 m/s²

Substituting into the above formula, we have:

620 = mass * 9.8

Mass = 620/9.8

Mass = 63.27 kg

Next, we would determine the force by using the formula;

Force = mass * acceleration

Force = 63.27 * 1

Force = 63.27 Newton

Answer:

See below.

Explanation:

1) Build relationships with key leaders and organizations

Early on, communicate with immigrant community leaders and groups to establish contacts, learn about these communities, and express your desire to include immigrant citizens in civic and political life. Make a list of them and keep it updated. Individuals and groups, be on the lookout for opportunities to meet with them and participate in local activities. Keep in touch with them on a regular basis and attend their events and activities.

2) Identify issues that immigrants care about

Identify problems of interest to immigrant populations through personal interactions, surveys, and meetings with local groups, and be prepared to include these themes in community talks and other public engagement initiatives. If a need is found, you can start with conversations and civic involvement in immigrant communities, since this can create channels for participation and leadership development for people who might not otherwise participate. Demonstrate how civic involvement may assist immigrants in achieving their goals and aspirations.

3) Overcome language barriers

Every participant should be prepared to participate, understood, and comprehend what others are saying as part of public engagement activities. Translation equipment and services should be provided, as well as outreach and issue background materials that are relevant for your community. The translation services should be mentioned in outreach for public engagement activities.

Ensure that documents are translated by native speakers or those who are entirely proficient in order for translations to be comprehended by readers. When conducting polls and surveys, it is preferable to ask questions in the native language of the residents. You may contact people with varied literacy levels through face-to-face, radio, and other non-written interactions.

4) Use effective media and outstretch strategies

Integrate immigrant-focused local and regional print and electronic media into your communication plan. Build ties with these media outlets, provide them access to information and local officials, send them news, announcements, and job ads, and work with them as partners to develop effective outreach to increase public participation. Inform suitable community, service, or business groups, schools, congregations, and others about a forthcoming public engagement activity. Request that the leaders of these organizations include particular solicitations for their immigrant members, as well as follow up with and assist those who are interested in attending.

Answer:

Buoyant force = g M / V * V = g d V where d is the mass / volume (density)

Fw = g * Vw * dw         buoyant force of water on block (10 N)

Fbr = g * Vw * dbr        buoyant force of brine on block

Fbr / Fw = 1.2        buoyant force of brine is 1.2 times that of water

Buoyant force of brine = 10 * 1.2 N = 12 N

Thus, the block will weight 90 - 12 = 78 N submersed in brine

Answer:

Eje x

           fr- F = m a

eje y    

           N-W =0

Explanation:

Para este ejercicio, debemos usar la segunda ley de Newton, donde se necesita fija un sistema de referencia el mas usado es un sistema horizontal y vertical para los ejes x e y  

en el adjunto puede ver el diagrama de cuerpo libre correcto,  

las fuerza son

Eje x

           fr- F = m a

eje y    

           N-W =0

la ecuacion para la fuerza de roce es

          fr = my N

In an equal circuit, all parts are associated across one another, subsequent in precisely two arrangements of electrically normal places.

The complete power in a series circuit is equivalent to the amount of power disseminated by the individual resistors.

The complete power disseminated will be equivalent to the amount of the power dispersed by every individual obstruction. Contingent upon the qualities that are known, blends of the power equation, also as Ohm's regulation, can be utilized to work out power disseminated (or some other obscure worth).

An equal circuit disseminates more power than a series circuit. For similar arrangements of resistors, the complete obstruction of the equal circuit is consistently lower than the all-out opposition in a series circuit.

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Answer:

(a) 6.67 m/s  (b) 3.33 m/s

Explanation:

if i understood your question correctly, the jogger goes 150m east before going in the opposite direction west for 50m. (see diagram)

in avg speed, we use the total distance (150m + 50m = 200m)  and total time (30s)

v = d/t =200/30 =6.67 m/s

in avg velocity, we use the total displacement  (150m - 50m = 100m) and total time (30s)

v= d/t = 100/30 = 3.33 m/s

The calculated value of speed of sound be 400 m/s.

An echo is a sound produced when sound waves are reflected off of a surface and returned to the listener. It is the sound that has been reflected, and it reaches the listener after the original sound has passed.

Given parameters:

The student's  distance to the wall is = 300 m.

The time delay between clap an echo is 1.5 seconds.

In this time, sound waves goes to the wall and hits back to the student's ear.

So, total distance covered by the sound wave: d= 2 × 300 m = 600 m.

Hence,  the speed of sound be - 600 m/1.5s = 400 m/s.

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Answer:

equator

Explanation:

in south & north pole you could have 20+ hours daylight or night, everyday!

Answer:

6.5 cm

Explanation:

Given that the edge dimension of a cube, a = 18.7 cm

Density of the cube, \(\rho_c= 653 kg/m^3\)

Volume of the cube, \(V_c= a^3= 18.7^3 cm^3=18.7^3\times 10^{-6}m^3\)

Mass of the cube. \(m_c= \rho_c \times V_c\)

\(=653\times 18.7^3\times 10^{-6}\) kg

Gravitational force action on the cube in the downward direction is

\(F_g=m_cg=653\times 18.7^3\times 10^{-6}\times g \;N \cdots(i)\)

where g is the acceleration due to gravity.

As the cube floats on the water, let the distance from the horizontal top surface of the cube to the water level is x cm.

So, the distance from the horizontal bottom surface of the cube to the water level= (18.7 - x) cm.

Volume of water replaced, \(V_w=\) volume of a portion of the

cube inside the water.

So, \(V_w= 18.7\times 18.7\times(18.7 - x) cm^3= 18.7^2\times(18.7 - x)\times 10^{-6}m^3\)

As the density of water, \(\rho_w= 1000 kg/m^3\)

So, the mass of the water displaced, \(m_w= \rho_w\times V_w\)

\(m_w=1000\times 18.7^2\times(18.7 - x)\times 10^{-6}\) kg

The buoyancy force acting on the cube in the upward direction,

\(F_b= m_w\times g\)

So, \(F_b=1000\times 18.7^2\times(18.7 - x)\times 10^{-6}\times g \; N \cdots(ii)\)

For the floating condition, the gravitational force acting on the cube in the downward direction must be equal to the buoyancy force acting on the cube in the upward direction.

So, equation equations (i) and (ii), we have

\(F_b=F_g \\\\\Rightarrow 1000\times 18.7^2\times(18.7 - x)\times 10^{-6}\times g=653\times 18.7^3\times 10^{-6}\times g \\\\\)

\(\Rightarrow 18.7-x=\frac{653\times 18.7^3\times 10^{-6}\times g}{1000\times 18.7^2\times 10^{-6}\times g} \\\\\Rightarrow 18.7-x=\frac {653\times 18.7}{1000} \\\\\)

\(\Rightarrow 18.7-x=12.2 \\\\\Rightarrow x=  18.7-12.2 \\\\\)

\(\Rightarrow x= 6.5\) cm

Hence, the distance from the horizontal top surface of the cube to the water level is 6.5 cm.

Answer:

e. the number of active motor units increases.

Explanation:

There is a direct relationship between the number of active motor units and the grip strength in a given scenario. For example, increase in the grip strength leads to increase in the number of active motor units. In the other-hand, the decrease in grip strength leads to the decrease in the number of active motor units.

The centripetal force acting on the small piece of dried cement is 0.01 N   when mass 50 g stuck to the inside wall of mixer.

Any force that alters velocity in the direction toward the center of a circular motion is referred to as a centripetal force. The centripetal force is produced by the portion of the force that is perpendicular to the velocity.

The period of the cement mixer can be calculated as:

                                T = 50 sec/rev

                                     = 2πr/v,

where r is the radius of the mixer and

v is the velocity of the piece of dried cement.

Solving for v, we get v = 2πr/T.

Substituting the given values, we get

                               v = 2π(2.5 m)/(50 sec/rev)

                                         = 0.314 m/s.

The centripetal force acting on the piece of dried cement can be calculated using the formula :

                                     F = m v² / r,

where m is the mass of the cement,

v is the velocity, and

r is the radius of the mixer.

Substituting the given values, we get

                                 F = (0.05 kg)(0.314 m/s)²/(2.5 m)

                                                      = 0.01 N.

Therefore, the centripetal force acting on the small piece of dried cement is 0.01 N.

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Answer:10 m/s

Explanation:

A 100 kg gymnast comes to a stop after tumbling. Her feet do 5,000 J of work to stop her. The girl's velocity when she began to stop is 10 m/sec.

When an item is moving, its velocity is the rate at which its direction is changing as seen from a certain point of view and as measured by a specific unit of time. Velocity is vector quantity.

Uniform motion an object is said to have uniform motion when object cover equal distance in equal interval of time within exact fixed direction. For a body in uniform motion, the magnitude of its velocity remains constant over time. Here in the question velocity is changing by using work energy theorem we have,

work done = change in kinetic energy

5000 = (.5).m.v² , where v is velocity.

5000 = (.5).100.v²

v = 10 m/sec

A 100 kg gymnast comes to a stop after tumbling. Her feet do 5,000 J of work to stop her. The girl's velocity when she began to stop is 10 m/sec.

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Answer: the radius of the circular path is approximately 1637.58 meters.

Explanation:

The centripetal force acting on the airplane is provided by the component of the gravitational force that acts towards the center of the circular path. This component is given by:

F_c = m * g * tan(banking angle)

Where:

F_c is the centripetal force

m is the mass of the airplane

g is the acceleration due to gravity

tan(banking angle) is the tangent of the banking angle

Now, the centripetal force is also given by the formula:

F_c = (m * v^2) / r

Where:

v is the speed of the airplane

r is the radius of the circular path

Equating the two expressions for F_c, we get:

(m * g * tan(banking angle)) = (m * v^2) / r

Canceling out the mass (m) on both sides of the equation, we have:

g * tan(banking angle) = v^2 / r

Solving for r, we get:

r = (v^2) / (g * tan(banking angle))

Substituting the given values:

v = 400 km/h = 400,000 m/h

g = 9.8 m/s^2

banking angle = 20°

Converting the speed to m/s:

v = 400,000 m/h * (1/3600) h/s = 111.11 m/s

Converting the banking angle to radians:

banking angle = 20° * (π/180) rad/° = 0.3491 rad

Now, substituting the values into the formula:

r = (111.11^2) / (9.8 * tan(0.3491))

r ≈ 1637.58 meters

Therefore, the radius of the circular path is approximately 1637.58 meters.

ANSWER:

1000 times

STEP-BY-STEP EXPLANATION:

Sound intensity level train = 90 dB

Sound intensity level machine = 120 dB

We can calculate the sound intensity in each case using the following formula:

We substitute each value and calculate I in each case:

Answer:

D) 60 m

Explanation:

We can use the constant acceleration equation that contains displacement, initial velocity, acceleration, and time. We want to solve for the time that the ball was in the air first.

Let's use this equation in terms of the y-direction.

The vertical displacement will be 0 meters since the ball will be on the floor. The initial vertical velocity is 10 m/s, the vertical acceleration is g = 10 m/s², and we are going to solve for time t.

Let's set the upwards direction to be positive and the downwards direction to be negative. We must use -g to be consistent with our other values.

Plug the known values into the equation.

Simplify the equation.

Factor the equation.

Solve for t by setting both factors to 0.

We get t = 0, t = 2. We must use t = 2 seconds because it is the only value for t that makes sense in the problem.

Now that we have the time that the ball was in the air, we can use the same constant acceleration equation to determine the horizontal displacement of the tennis ball. We will use this equation in terms of the x-direction:

Plug the known values into the equation.

We can eliminate the right side of the equation since anything multiplied by 0 outputs 0.

The horizontal displacement of the ball is 60 meters. Therefore, the answer is D) 60 m.

Answer:

Load

Explanation:

The load in an electric circuit is any device that converts electrical energy into another form of energy.

a) The angle θ1 which the righthand cable makes with respect to the ceiling is  sin^(-1)(692 N / 530 N).

b) The angle θ2 which the left-hand cable makes with respect to the ceiling is  sin^(-1)(692 N / 570 N).

We may utilise the tension of the right-hand cable as well as its vertical and horizontal components to determine the angle 1. θ2 = sin^(-1)(692 N / 570 N).

We may apply the ideas of trigonometry and vector addition to address this issue.

a) The tension of the right-hand wire as well as its vertical and horizontal components can be used to determine the angle 1.

T1sin(1) calculates the vertical component of the right-hand cable's tension, which is equal to the object's weight (692 N).

T1sin(θ1) = 692 N

We may rearrange the equation to find 1:

θ1 = sin^(-1)(692 N / T1)

We can find 1 by substituting the given tension value, T1 = 530 N:

θ1 = sin^(-1)(692 N / 530 N)

b) Similarly, we can use the formula to determine the angle 2 the left-hand cable's tension and its vertical and horizontal components.

The vertical component of the left-hand cable's tension is given by T2sin(θ2), and it should also be equal to the weight of the object (692 N).

T2sin(θ2) = 692 N

To find θ2, we can rearrange the equation:

θ2 = sin^(-1)(692 N / T2)

Substituting the given tension value T2 = 570 N, we can solve for θ2:

θ2 = sin^(-1)(692 N / 570 N)

Calculating these angles using the given tension values will provide the answers in degrees.

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Answer:

214.72m

Explanation:

The range (R) of a projectile can be calculated using the formula:

R = u²sin2θ/g

Where R = Horizontal range

u = initial velocity

θ = angle of initial velocity

g = acceleration due to gravity (9.8m/s²)

According to the provided information in this question, R= ?, u= 51m/s, θ = 63°, g = 9.8m/s².

Hence, R = u²sin2θ/g

R = 51² × sin 2×63/ 9.8

R = 2601 × sin 126/9.8

R = 2601 × 0.809/9.8

R = 2104.25/9.8

R = 214.72m

Answer:

Air moves from regions of high pressure to regions of low pressure.

Explanation:

When airs moves horizontally from regions of high pressure to low pressure, it creates wind. If the difference between high and low pressure is greater, then it makes the wind faster.

Best of Luck!

Answer:

C. Air moves from regions of high pressure to regions of low pressure.

Explanation:

The air from the regions of high pressure will hold onto that pressure. So, when it moves into the regions with low pressure it'll turn into wind.  

The greater the pressure, the stronger the wind and vise versa.

Hope this helps!