1. A ball is thrown downward with an initial speed of 20 m/s on Earth.
a. What is the acceleration of the ball?

The mathematical relationship between m₁ and m₂ is that m₁ is twice the value of m₂.

Length of the femur, L = 0.9 m

Mass of the femur, M = 10 kg

Centre of gravity = L/3

m₁ + m₂ = M

T₁ + T₂ = Mg

m₁g + m₂g = Mg

T₁ + T₂ = m₁g + m₂g

T₁(L/3) = T₂(2L/3)

m₁g(L/3) = 2m₂mg(L/3)

Therefore,

m₁ = 2m₂

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Answer:

Earth's surface is broken into large pieces that are slowly shifting. ... This movement creates many of Earth's landforms, such as mountains, rift valleys, and volcanoes. According to the theory of plate tectonics, 250 million years ago all of Earth's landmasses were clustered into one supercontinent, known as Pangea.

or

Presently the plates are moving towards each other and will eventually merge into one landmass once again. Presently Africa I moving towards Europe and Asia and will merge with that landmass, closing the Mediterranean Sea. When plates move towards each other extensive fold mountain ranges will form; a modern day example is the Himalayan mountain range. This type of movement will impact ocean currents as we know it and bring about a dramatic change in the climate. Disruption of currents and the closure of some water ways and oceans will lead to the extinction of some species. Leaving only those who are able to adapt to the new climatic conditions.

Explanation:

you can choose either one

Answer:

Based on what I have learned this year and past knowledge, I think they will move in a combination of two. The tectonic plates move around the planet but move very slowly, only a few centimeters per year, which plays a big part in the picture. If you look at California, It's splitting! But who is to say that the continents will not cluster to another land as it spreads out. There's also not enough space on earth for every piece of land. But when they do end up clustered together, mountains will be formed, and if they spread out, faults will be created. So I think in 250 million years we will have another supercontinent like Pangea. I also believe that there will be many new geographical changes, including volcanoes, more mountains, and deeper oceans. This will also cause new Invasive species and the destruction of man-made buildings.

Explanation:

palto users

Answer:  a stretch of 2

Explanation: because it 2 (x) - 3

Electric field lines are a powerful tool to understand and visualize electric fields. They help to represent the direction and magnitude of the electric field at various points around a charged object.

The following statements are true about electric field lines:

A. Electric field lines cannot cross: This is because at the point where two field lines cross, there would be two directions for the electric field, which is impossible. Hence, the lines do not cross, and this is one of the fundamental characteristics of electric field lines.

B. Lines of electric field only originate from positive charges: Electric field lines originate from positive charges and terminate at negative charges. This is because positive charges repel positive charges and attract negative charges. Therefore, the electric field lines originating from a positive charge terminate at a negative charge.

C. Field lines point in the direction of the force the electric field creates on an electron: Electric field lines point in the direction of the force that would be experienced by a positive charge placed at any point in the field. Electrons, being negatively charged, would experience a force in the opposite direction to the electric field.

D. The strength of the electric field is greater in regions where the field lines are closer together: The density of field lines indicates the strength of the electric field. The closer the lines are, the stronger the field at that point.

E. In an electric-field-line drawing with many point charges, the number of field lines originating or terminating on each charge is proportional to the charge. That is, bigger charges have proportionally more field lines: The number of field lines originating or terminating on each charge is directly proportional to the magnitude of the charge.

F. The true strength of an electric field at any point can be determined from an electric field representation: The strength of the electric field at a point can be determined by the density of electric field lines at that point. However, the actual strength of the field would require quantitative measurements using instruments such as a voltmeter or an electrometer.

In conclusion, electric field lines are an essential tool in understanding the behavior of electric fields. They provide a visual representation of the electric field, its direction, and its strength at various points in space.

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Answer:

False

Explanation:

As technology advances and new evidence is found which either contradicts or supports accepted scientific principles, the principles are susceptible to change.

There are 90 phones of volume, 10-7 W/m2 of sound intensity, and 0.0314 watts of source power.

A straightforward frequency analysis compares the values of the fields you provide and generates a report listing each value for those fields along with the frequency at which each value occurs.

The rate at which a sound power wave repeats itself, also known as frequency or pitch, is measured in cycles per second. Bullfrog calls and cricket chirps have lower frequencies than drum beats and whistles, respectively.

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Answer:

25m/s

Steps:

First, The equation v= u + a * t shows us what we need to find, (the finale velocity).

Second, we substitute the values given:

v= 9m/s + 4m/s2 * 4s

Last, We calculate the values:

Multiply 4m/s2 * 4s = 16m/s  

Add 9m/s + 16m/s

Answer:  25m/s

Hope this helps :)

Answer:

The energy an object has because it is moving

Explanation:

It has been a while since I have talked about kinetic energy so I can't give you an explanation why that answer is right but it is.

Explanation:

where I is the current, L is the length of the wire, and B is the magnetic field.

If we point our right-hand thumb in the direction of the current (to the right), and our fingers in the direction of the magnetic field (away from us), then our palm will point in the direction of the force.

Answer:

290 N of horizontal force

Explanation:

To calculate the Net force of an object you find the sum of each force.

225 N + 165 N = 290 N

Since the reference direction is horizontal, that's how i got 290 N of horizontal force.

I hope you found this helpful...

The net force on the canoe is equal to 390N when both forces act in the same direction.

The net force can be defined as the vector sum of all the forces acting on a particle. The net force is a single force indicating same the effect of the original forces on the motion of the particle. The net force is equal to the same acceleration as all actual forces together.

The net force will become the resultant force. The net force has the same effect on the rotational motion as all actual forces together.

If the two acting forces on the canoe are acting in the same direction then the net force il be equal to the sum of these two forces.

Given, the one horizontal force on the canoe, F₁ = 225N

The other horizontal force on the canoe, F₂ = 165 N

The net force on the canoe, F = F₁ + F₂ = 225 + 165 = 390 N

Therefore,  the net horizontal force on the canoe is equal to 390 N.

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The atomic number of an atom when the number of neutrons in the nucleus of that atom increases, it remains the same.

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The amount of work done by the gas is proportional to the pressure and the change in volume, as well as the efficiency of the process. If the pressure and volume are known, the work done by the gas can be calculated by multiplying these values by the efficiency of the process.

The amount of work done by a gas when it expands is proportional to the change in volume, pressure, and temperature. According to the first law of thermodynamics, the energy of a closed system is conserved, so the work done by the expanding gas is equal to the energy transferred from the gas to the environment in the form of work. Therefore, the work done by the gas is equal to the change in energy of the system. Assume that the process is 10% efficient. Then, only 10% of the energy available to the system is converted into work. This means that the remaining 90% of the energy is lost to the environment in the form of heat. As a result, the amount of work done by the gas expanding into the atmosphere is given by the formula

W = E x η, where W is the work done by the gas, E is the energy available to the system, and η is the efficiency of the process. The energy available to the system is determined by the difference between the internal energy of the gas before and after the expansion. The internal energy of a gas is determined by its temperature, pressure, and volume.

Assuming that the temperature and pressure are constant, the change in internal energy is proportional to the change in volume. Therefore, the energy available to the system is equal to the product of the pressure and the change in volume: E = P x ΔV, where P is the pressure of the gas and ΔV is the change in volume during the expansion. Substituting this equation into the formula for work, we get W = P x ΔV x η.

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The speed of the puck is 3.67 m/s.

To find the speed of the puck, we can use the concept of centripetal force. The tension in the string provides the necessary centripetal force to keep the puck moving in a circle. At the same time, the tension in the string also supports the weight of the suspended mass.

Using Newton's second law, we can write two equations of motion: one for the puck and one for the suspended mass. For the puck, the net force acting on it is the tension in the string, which is equal to the centripetal force required to keep it moving in a circle. Thus, we can write:

= m1 * v^2 / R

where T is the tension in the string, v is the speed of the puck, and R is the radius of the circle.

For the suspended mass, the net force acting on it is its weight minus the tension in the string, which must be zero since the mass is in equilibrium. Thus, we can write:

T = m2 * g

where g is the acceleration due to gravity.

Combining these two equations, we can solve for the speed of the puck:

v = sqrt(T * R / m1) = sqrt(m2 * g * R / m1)

Substituting the given values, we get:

v = sqrt(1.0 kg * 9.81 m/s^2 * 0.9 m / 0.21 kg) = 3.67 m/s

Therefore, the speed of the puck is 3.67 m/s.

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Answer:

make a pineapple schematic

Explanation:

Un proyectil se define como cualquier objeto que traza una trayectoria parabólica. Los parámetros importantes en el movimiento de proyectiles son; Tiempo de vuelo, rango y altura máxima.

a) 1 segundo

b) 1,25 m

c) 10 m

Deje que el tiempo de vuelo sea T

T = 2usinθ / g

u = velocidad inicial

g = aceleración debida a la gravedad

θ = ángulo

T = 2 * 10 m / s * sin (30) / 10

T = 1 segundo

Sea la altura máxima H

H = u ^ 2 sin ^ 2 θ / 2g

H = (10) ^ 2 (sin30) ^ 2/2 * 10

Alto = 1,25 m

Sea el rango R

R = u ^ 2sin 2θ / g

R = (10) ^ 2 sin 2 (30) / 10

R = 8.66 m

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a) El tiempo que tarda el proyectil en llegar al piso es:

\(t_{vuelo}=1\: s\)  

b) La máxima altura alcanzada por el proyectil es:

\(y_{max}=1.25\: m\)  

c) La máxima distancia alcanzada por el proyectil es:

\(x_{max}=8.66\: m\)

a)

Para calcular el tiempo que le toma al proyectil llegar al piso, se puede usar la siguiente ecuación de tiro parabólico.

\(y=y_{i}+v_{iy}t-0.5gt^{2}\) (1)

Donde:

Recordemos que la componente de la velocidad incial (v(i)=10 m/s) en el eje y esta dada por:

\(v_{iy}=v_{i}sin(30)\)

\(v_{iy}=10sin(30)\)

Sabemos que y(i) = 0 y ademas haciendo que y = 0, sabremos el tiempo total de vuelo. De la ecuación (1):

\(0=0+10sin(30)t-0.5(10)t^{2}\)

Despejando t.

\(10sin(30)=0.5(10)t\)

\(t=\frac{10sin(30)}{5}\)  

El tiempo de vuelo sera:

\(t_{vuelo}=1\: s\)  

b)

Para calcular la máxima altura, usamos la siguiente ecuación.

\(v_{fy}^{2}=v_{iy}^{2}-2gy\)

Si hacemos que veocidad final en y v(fy) sea 0, encontraremos la máxima altura.

\(0=v_{iy}^{2}-2gy_{max}\)

\(0=(v_{i}sin(30))^{2}-2gy_{max}\)

Despejamos y(max):

\(y_{max}=\frac{(v_{i}sin(30))^{2}}{2g}\)

\(y_{max}=\frac{(10sin(30))^{2}}{2(10)}\)  

La máxima altura alcanzada por el proyectil será:

\(y_{max}=1.25\: m\)  

c)

Sabemo que la velocidad del proyectil en la dirección x es constante, por lo tanto, la ecuacion cinemática será:

\(x=vt\)

La máxima distancia se determina con el tiempo de vuelo:

\(x_{max}=v_{ix}t_{vuelo}\)

La componente de la velocidad en la direccion x es:

\(v_{ix}=v_{i}cos(30)\)

Por lo tanto, el máximo desplazamiento será:

\(x_{max}=10cos(30)*1\)

\(x_{max}=8.66\: m\)

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Answer:

"A turbine takes the kinetic energy of a moving fluid, air in this case, and converts it to a rotary motion. As wind moves past the blades of a wind turbine, it moves or rotates the blades. These blades turn a generator."

Gravity force, friction force and buoyant force are the types of forces given below.

A) The force which prevents a glass bottle from slipping out of your hand- friction force

B) The force which makes it difficult to climb a steep mountain- gravity

C) The force which gives you weight- gravity

D) The force which makes it difficult for you to push down a float in water- buoyant force

E) The force which causes a parachutist to fall when he jumps out of a helicopter- gravity

F) The force which slows down an airplane moving in air- friction force

G) The force which makes a compass turns​- gravity

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Answer:

it would float

Explanation:

theres no gfravity= floating melon

Answer:

It would float if there was no gravity.

Explanation:

A time when when I used a defense mechanism is when I was coming back from night class and was really tressed and tired.  i heard footsteps following me, since i was scared, i turned and behave like a marshal artist and my leg hit the person.

How you could have managed the stressful situation differently is to stay calm and see if the person was still just coming back also from class. Changed my movement or direction to see if the person will go the other way from me.

Since I am interacting with a patient who appears to be stressed. I can be able to help the patient relax by singing them a smoothing song or telling them a soul lifting stories.

Therefore, A time when when I used a defense mechanism is when I was coming back from night class and was really tressed and tired.  i heard footsteps following me, since i was scared, i turned and behave like a marshal artist and my leg hit the person.

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The coefficient of kinetic friction is determined as 0.75.

The coefficient of kinetic friction is calculated by applying the newton's second law of motion.

Fsinθ - Ff = ma

where;

W = mg

where;

m = W/g

m = 325/9.8

m = 33.2 kg

425 sin(35.2)   -  Ff = 33.2a

425 sin(35.2)   -  μW = 33.2a

at constant velocity, a = 0

425 sin(35.2)   -  μW= 0

μW = 244.98

μ = 244.98/W

μ = 244.98/325

μ = 0.75

Thus, the coefficient of kinetic friction is 0.75.

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For the following are four electrical components:

a. For components A and B, both of which obey Ohm's law, the current-voltage characteristics would be a straight line passing through the origin. The slope of the line for component B would be steeper than that of component A, indicating higher resistance.

b. The shape of the characteristic for component C, the filament lamp, can be explained by its construction. A filament lamp consists of a filament made of a resistive material, typically tungsten, which heats up and emits light when an electric current passes through it.

c. The component chosen for D, which does not obey Ohm's law, could be a diode. A diode is a two-terminal electronic component that allows the current to flow in only one direction.

For the following are four electrical components:

a. Sketches of current-voltage characteristics:

For components A and B, both of which obey Ohm's law, the current-voltage characteristics would be a straight line passing through the origin. The slope of the line for component B would be steeper than that of component A, indicating higher resistance.

  Current (I)

     ^

     |          B

     |         /

     |        /

     |       /

     |      /

     |     /

     |    /

     |   /

     |  /

     | /

     |/

     +------------------> Voltage (V)

     Current (I)

     ^

     |          A

     |         /

     |        /

     |       /

     |      /

     |     /

     |    /

     |   /

     |  /

     | /

     |/

     +------------------> Voltage (V)

For component C, a filament lamp, the current-voltage characteristic would be a curve that is not linear. It would exhibit a non-linear increase in current with increasing voltage. At lower voltages, the lamp would have low resistance, but as the voltage increases, the resistance of the filament also increases due to the phenomenon of thermal self-regulation. This leads to a slower increase in current at higher voltages.

For component D, a component that does not obey Ohm's law, the current-voltage characteristic could be any non-linear curve depending on the specific component chosen. Examples of components that do not obey Ohm's law include diodes and transistors.

b. The shape of the characteristic for component C, the filament lamp, can be explained by its construction. A filament lamp consists of a filament made of a resistive material, typically tungsten, which heats up and emits light when an electric current passes through it. As the voltage across the filament increases, the temperature of the filament increases as well, causing its resistance to increase. This increase in resistance results in a slower increase in current with increasing voltage, leading to the characteristic non-linear curve observed.

c. The component chosen for D, which does not obey Ohm's law, could be a diode. A diode is a two-terminal electronic component that allows the current to flow in only one direction. It exhibits a non-linear current-voltage characteristic where it conducts current only when the voltage is above a certain threshold, known as the forward voltage. Below this threshold, the diode has a high resistance and blocks current flow in the reverse direction. The characteristic curve of a diode would show negligible current flow until the forward voltage is reached, after which it exhibits a rapid increase in current with a relatively constant voltage.

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Answer:

10 s

Explanation:

u  =  0 m/s

v  =  20 m/s                          

a  =  2 m/s²                          

t   =  ?                                

                                  a  =  \(\frac{v - u}{t}\)  

                                  2  = (20 - 0)/ t

                                  t   =  10 s

Answer:

D

Explanation:

15m/ s

i hope this helps

Answer:

10m/s²

Explanation:

Given parameters:

Initial velocity  = 0m/s

Final velocity  = 100m/s

Time taken  = 10s

Unknown:

Acceleration  = ?

Solution:

Acceleration is the rate of change of velocity with time.

  A = \(\frac{v - u}{t}\)

v = final velocity

u = initial velocity

t = time taken

 So, insert the parameters and solve;

  A = \(\frac{100 - 0}{10}\)   = 10m/s²

The silver would be coolest since it has the lowest heat capacity.

Heat capacity, also known as thermal capacity, is the amount of heat energy required to raise the temperature of a substance by a certain amount. It is expressed as the amount of heat energy per unit temperature change, and is usually measured in joules per kelvin (J/K) or calories per degree Celsius (cal/°C).

Heat capacity is a key property of materials that provides important information about their thermal behavior and is critical for many areas of science and technology.

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Answer:

A force that resists the relative motion or tendency to such motion of two bodies in contact. uniform motion: Motion at a constant velocity (with zero acceleration). Note that an object in motion will not change its velocity unless an unbalanced force acts upon it.

Explanation:

A force that resists the relative motion or tendency to such motion of two bodies in contact. uniform motion: Motion at a constant velocity (with zero acceleration). Note that an object in motion will not change its velocity unless an unbalanced force acts upon it.