One way to control avalanches is to send explosive charges to key areas on mountain slopes to trigger small avalanches before larger ones can build up. Norway, for instance, uses solar- powered launchers that fire pre-timed charges. Your launcher fires charges at an angle of 70 degrees from the horizontal and a speed of 200 m/s. If you fire a charge and it travels a horizontal distance of 300 m away from you, how high up the slope will it strike?.

Answer:

1. 360/6=60 Kilometers per hour

2. 120/3=40 Kilometers per hour

Rate of change is used to mathematically describe the percentage change in value over a defined period of time

A spherical balloon is inflated with gas at a rate of 700 cubic centimeters per minute. the radius of the balloon will be  changing at a rate of 0.035 cm/min at the instant the radius is 40 centimeters

given

Radius = 40 cm

dv / dt = 700

to find

Rate by which radius of balloon is changing = ?

volume of sphere = 4/3 π [tex]r^{3}[/tex]

dv/dt = 4/3 *  π [tex]r^{3}[/tex] dr/dt

dv/dt = 4/3 * 3 * π [tex]r^{2}[/tex] dr/dt

dv/dt = 4/3 * 3 * (3.14) * ([tex]40^{2}[/tex])  dr/dt

dv/dt = 20096 dr/ dt

700 = 20096 dr/dt

dr/dt = 700 / 20096

        = 0.035 cm/min

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Answer:

what do u need for this question

The velocity of a diver just before hitting the water is -10.1 m/s, where the minus sign indicates that her motion is directly downward. -5.06 m is her displacement during the last 1.20 s of the dive.

Velocity is the directional speed of a moving item as an indication of its rate of change in position as seen from a specific frame of reference and measured by a specific time standard (e.g., 60 km/h northbound). The idea of velocity is crucial in kinematics, the part of classical mechanics that explains the motion of bodies.

A physical vector quantity called velocity requires both magnitude and direction to be defined. Speed is a coherent derived unit that expresses the scalar absolute value (magnitude) of velocity. Its quantity is expressed in SI units (metric system) of metres per second (m/s or ms1). For example, "5 meters per second" is a scalar while "5 meters per second east" is a vector.

We are given that

v = -10.1 m/s

t = 1.20 s

[tex]v_0[/tex] = ?

a = g = - 9.80 m/s²

as we know upward movement is positive and downward movement is negative, we can find [tex]v_0[/tex] with this formula

⇒ v = [tex]v_0[/tex] + at

⇒ -10.1 = [tex]v_0[/tex]  + (- 9.80 )(1.20)

⇒ -10.1 = [tex]v_0[/tex]  - 11.76

⇒  [tex]v_0[/tex] = 1.66 m/s

As we have found velocity, now we can find displacement with this formula

⇒ [tex]\lambda[/tex] =  [tex]v_0[/tex] t + [tex]\frac{1}{2} at^2[/tex]

⇒ [tex]\lambda[/tex] = (1.66 m/s)(1.20 s) + [tex]\frac{1}{2}[/tex](- 9.80 m/s²)(1.20 s)²

⇒ [tex]\lambda[/tex] = 1.992 m - 7.056 m

⇒ [tex]\lambda[/tex] = -5.064 m

      = -5.06 m

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Answer: (b) 4 mi

Explanation:

    We will convert both options to a singular unit.

4 km ≈ 2.49 miles

    Now, we can more easily compare them.

4 miles ? 2.49 miles

4 miles > 2.49 miles

                  b, 4 mi is larger

Ez = kqz / (z^2+a^2)^3/2 is the answer.

The expression of the electric field is,

E=kq / r^2

Here, r is the distance and its value is [tex]\sqrt{z^2 + a^2}[/tex]

Substitute the value of r in the above expression.

E=kq /  [tex]\sqrt{z^2 + a^2}[/tex]^2

The expression of the electric field along the z-direction is given by,

dEz=dEcos[tex]\int\limits {dEcosθ} \,[/tex]

Here, the value of the cosine function is z /  [tex]\sqrt{z^2 + a^2}[/tex]

On integrating the above expression and substituting the value

[tex]\int\limits{dEz} \,[/tex] =[tex]\int\limits{dEcosθ}[/tex]

Ez = Ecosθ

Ez = kq /  [tex]\sqrt{z^2 + a^2}[/tex]^2 *  z /  [tex]\sqrt{z^2 + a^2}[/tex]

Ez = kqz / (z^2+a^2)^3/2

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Although part of your question is missing the question is Consider a uniformly charged ring in the XY plane, centered at the origin. The ring has a radius a and positive charge q distributed evenly along its circumference. What is the magnitude of the electric field along the positive z-axis due to the ring? Use k in your answer, where k=1/4πε

The mass of baking soda required that will have a volume of 30 mL is  66 g.

The mass of a substance can be determined if the volume and the density of the substance are known.

The mass of a substance is related to the density and the volume of the substance by the following equation:

mass = density * volume

Considering the data provided about the baking soda:

volume of baking soda required = 30.0 mL

density of baking soda = 2.20 g/mL

Hence, mass of baking soda will be;

mass of baking soda = 2.20 g/mL * 30.0 mL

mass of baking soda = 66 g

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To produce a total potential of more than 0.10 V, the cells must be connected in series such that every cell experiences the same current.

If the positive terminal of the first cell is connected to the negative terminal of the second cell and the positive terminal of the third cell, the cells are said to be connected in series. Every cell experiences the same current.

When one battery’s positive terminal is attached to the next one’s negative terminal, a group of batteries is said to be connected in series. The total algebraic sum of all the cells that is connected in series creates the totally battery’s overall emf.

Cells are connected from end to end to form a total series, allowing the same current to pass through each cell.

In a parallel connection the total potential difference remains the same and then this can be calculated as

Vtot = V

here V can be seen as the potential of each cell.

When in a series connection, the total potential difference of the capacitors cannot be counted as same unless their exact capacitances are same.

So, the potential differences of the capacitors can add up in total as

Vtot = V1 + V2 + V3 + and so on...

Here the total potential is seen as higher than the total individual capacitors.

So as to produce a total potential of more than 0.1 V, the cell must be connected in series.

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Complete Question

Electric eels and electric fish generate large potential differences that are used to stun enemies and prey. These potentials are produced by cells that each can generate 0.10 V. We can reasonably model such cells as charged capacitors.

How should these cells be connected (in series or parallel) to produce a total potential of more than 0.10 V?

Explanation:

The object displacement over the 9 seconds interval will be 0 m. Displacement can be define as the shift in the position of an object with respect to the reference frame.

An object's location changes if it moves with regard to a reference frame, like when a passenger moves to the back of an airplane or a lecturer moves to the right with respect to a whiteboard. Displacement is the term used to explain this shift in position.

The distance an item travels from its starting point until it reaches a certain velocity can be calculated using the formulas t = (v vi)/g and y = gt2/2 + vit. The equation for the object's velocity at a particular distance from the starting point is the outcome of this.

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A small pebble is dropped from the top of a very high cliff, the pebble will be moving with a speed of 50 m/s.

vi=0

vf=?

a= 10m/[tex]s^{2}[/tex]

s= 125m

By newton's third law of motion,

2as = [tex]v_{f} ^{2}[/tex] - [tex]v_{i} ^{2}[/tex]

[tex]v_{f} ^{2}[/tex] = 2x 10 x 125

[tex]v_{f}[/tex] = [tex]\sqrt{2500}[/tex] = 50m/s

These are the three equations:

v = u + at.

S = ut + 1/2a[tex]t^{2}[/tex];

[tex]v^{2}[/tex] = [tex]u^{2}[/tex]+ 2as.

The fundamental equation of motion in classical mechanics is Newton’s second law, which states that the force F acting on a body is equal to the mass m of the body multiplied by the acceleration an of its center of mass, or F = ma.

Motion can be divided into three categories depending on its type, as follows: linear movement and Rotational Motion in oscillations.

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Answer: a point from which the weight of a body or system may be considered to act. In uniform gravity it is the same as the center of mass.

Explanation:

look it up

Answer: no

Explanation:

momentary rest = object is NOT in motion at that instant of time

In the moment that the object is at rest, the velocity is 0 meaning that there is no acceleration.

The wires will be arranged in order of increasing resistance.

The resistance of a wire is given by

[tex]R=\frac{pL}{A}[/tex]

where

p is the resistivity of the material

L is the length of the wire

A is the cross-sectional area of the wire

The only quantity that varies in this problem is the thickness, which corresponds to the value of A for each of the many wires, all of which are constructed of the same material and have the same length (same L).

Since the resistance R is inversely correlated with the cross-sectional area A, we can infer from the formula that the smaller the value of A, the higher the value of R. Accordingly, if we arrange the wires in decreasing order of thickness, we are actually doing so in increasing order of resistance.

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The direction of the current flowing in the wire is inside the plane when viewed from above.

The direction of a magnetic field in a current carrying conductor can be found out by using Right Hand Thumb Rule.

According to this rule. if we suppose a straight wire is carrying current, not if we align the thumb of our right hand in the direction of the flowing current, then the direction of the magnetic field is same as that of the the curling fingers.

In our question, if we apply this rule then we can find, if we align our fingers in the same manner as that of the magnetic field, then the direction of our pointing thumb will be inside. The direction of thumb pointing will be same as that of the current.

So, we can say that by Right Hand Thumb Rule, the direction of the flowing current is Inside when viewed from top.

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If the distance between the two charges is doubled, the attraction or repulsion becomes weaker, when the distance between the two charges is halved, the force is increased four times.

An object with mass feels a push or pull, which modifies its velocity. An agent with the ability to change a body's resting or moving condition is known as an external force.

As stated, the distance between them that is divided in half is equal to r/2.

Let [tex]F_{\prime}[/tex]  be the force when the distance is cut in half between the charges.

It is possible to express the force between the two charged particles as

where, q1 and q2 are the charges, r  is the distance,  is k constant of proportionality(Coulomb's constant), F is the force between the charges.

Calculation of the force at a halving of the distance between the charges

The force is reduced by half when the distance is:

[tex]F=\frac{k q_1 q_2}{r^2}[/tex]

[tex]F \prime=\frac{k q_1 q_2}{\left(\frac{r}{2}\right)^2}[/tex]

[tex]F /=\frac{4 k q_1 q_2}{r^2}[/tex]

[tex]F_{\prime}[/tex] = 4F

As a result, when the space between the two charges is cut in half, the force is multiplied by four.

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Answer:

21.872

Explanation:

Answer:

length

Explanation:

If the falling time of an object is doubled, it will then that means that the length is doubled

Answer:

It is 3

Explanation:

the reason its 3 is the wire is electrical and it heats up like a phone screen after using it for too long and its kinetic energy to thermal because the energy in the wires stop when they are broken because there is no way the energy can jump the wires

Answer:

Ernest Rutherford (later Lord Rutherford)

By ideal gas approximation, the total number of moles of Ne is 3 moles.

We need to know about the ideal gas theory to solve this problem. The ideal gas is assumed that there is no interaction between particles in a gas. It can be determined by the equation

P . V = n . R . T

where P is pressure, V is volume, n is the number of moles gas, R is the ideal gas constant (8.31 J/mol.K) and T is temperature.

From the question above, we know that

STP condition (P = 1.01 x 10⁵ Pa, T = 273 K)

n = 3 moles

The ideal gas depends on the number of moles. Hence, the total number of moles of Ne will be the same as CO₂ (3moles).

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The distance travelled by the car in the first 20 seconds of the motion is 130 m.

The area under the speed-time graph is the distance the particle travels.

The distance traveled by the car in the first 20 seconds is calculated as follows;

From the speed - time graph, at 20 seconds, the speed of the car is 13 m/s.

Distance = area of the graph = area of triangle formed from time, 0 s to 20 seconds.

Distance = ¹/₂bh

where;

Substitute the given parameters and solve for the distance traveled by the car.

Distance = ¹/₂bh

Distance = ¹/₂(20)(13)

Distance = 130 m

Thus, the distance travelled by the car in the first 20 seconds of the motion is 130 m.

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The missing graph is in the image attached.

Displacement is the movement of unfavorable emotions from one thing or person to another.

As a kind of self-preservation, displacement is the act of shifting one's unfavorable emotions from one thing or person to another.

According to the notion, releasing stress or worry on a non-threatening target helps a person deal with negative emotions like fear or rage.

For instance, if a person feels angry because their boss yells at them, they might project those feelings onto someone or something else, such a member of their family or a piece of furniture.

For fear of losing their work, the person could feel unable to face their manager. As a result, they might vent their rage on a less dangerous person like their partner or housemate.

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Erwin Schrödinger developed the equation that allowed the energy of the electron to be described quantum mechanically.

Schrödinger's equation is,

Hamiltonian operator * Wave function = Energy * Wave function

It is partial differential equation which describes the wave function of a quantum - mechanical system. It is the most important part of quantum wave mechanics.

At first, Louis de Broglie stated that all particles could be treated as matter waves. Then Erwin Schrödinger specifically introduced a model of an atom, in which electrons are treated as matter waves.

Therefore, Erwin Schrödinger developed the equation that allowed the energy of the electron to be described quantum mechanically.

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Both the solar system and interstellar space are very large. 150 million kilometers are equivalent to one astronomical unit. Instead of having to count everything in millions or billions of kilometers, it is much simpler to count the distances if they are in counts of Astronomic Units.

Why do astronomers use light years or astronomical units to describe distances in space instead of miles or meters?

Both the solar system and interstellar space are very large. 150 million kilometers are equivalent to one astronomical unit. Instead of having to count everything in millions or billions of kilometers, it is much simpler to count the distances if they are in counts of Astronomic Units.

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In the given experiment, the length of the wire, the type of wire utilized, and the thermal conductivity of the wire are the independent variables.

In the mentioned experiment, three kinds of variables are used, that is, the independent variable, the dependent variable, and the controlled variable. Of these the independent variables are the one that does not get modified, however, can be modified by the scientist, while the dependent variables are the one that modifies when the independent variables modify, and the controlled variables are the ones that are maintained the same throughout.  

In the given experiment, the length of the wire, the type of wire utilized, and the thermal conductivity of the wire are the independent variables.

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The two cars (red and green) are 2280 m apart

Speed is the distance travelled per unit. Mathematically, it can be expressed as:

Speed = distance / time

With above formula, we can determine the distance by the red car. Details below

The following data were obtained from the question:

The distance traveled by the red car in 2 mins ( i.e 120 s) can be obtained as followed:

Speed = distance / time

Cross multiply

Distance = speed × time

Distance = 19 × 120

Distance = 2280 m

Thus, the red and green cars are 2280 m apart

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Answer: Caffeine can change your response pattern; that jlot of wonderful energy people love can send your brain and body panicking which in tow starts up your flight or fight response.

B. Signals from sensory neurons reach motor neurons through interneurons in the brain and spinal cord that connect sensory neurons and motor neurons.

Sensory neurons are the nerve cells that work based on the sensory input from outside stimulus.

Motor neurons are special type of neurons or never cells that are found within the spinal cord and the brain.

The sensory neurons carry afferent impulse to the central interneuron, which connects with the motor neuron.

The motor neuron carries efferent impulses to the effector, and cause the response observed.

Thus, signals from sensory neurons reach motor neurons through interneurons in the brain and spinal cord that connect sensory neurons and motor neurons.

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