Climbing a tree would
A. decrease your potential energy
B. increase your kinetic energy
C. increase your potential energy

Answer:

\(V_1=2mL\)

Explanation:

Hello,

In this case, considering this as a dilution problem, the first step here is to consider that the moles of tetrodotoxin remains the same and just the volumes and concentrations are modified from the initial stock (1) and the required dilution (2):

\(V_1M_1=V_2M_2\)

Whereas V is referred to volume and M to molar concentration, in this case in mM. In such a way, solving the V1 as the volume of the 3-mM solution we obtain:

\(V_1=\frac{V_2M_2}{M_1} \\\\V_1=\frac{6mL*1mM}{3mM} \\\\V_1=2mL\)

It means you need 2 mL of the 3-mM solution.

Best regards.

Answer:

It bends.

Explanation:

Water is denser than water. This causes light that is passing from air to water to appear to bend towards the normal line near the water's surface.

Displacement of the airplane (s) = 2000 m

Initial velocity of the airplane (u) = 0 m/s (Starts from rest)

Final velocity of the airplane = 56.4 m/s

Equation used to solve the problem:

\( \boxed{ \bf{ {v}^{2} = {u}^{2} + 2as}}\)

By substituting values in the equation, we get:

\( \rm \longrightarrow {56.4}^{2} = {0}^{2} + 2 \times a \times 2000 \\ \\ \rm \longrightarrow 3180.96 = 0 + 4000a \\ \\ \rm \longrightarrow 4000a = 3180.96 \\ \\ \rm \longrightarrow \dfrac{4000a}{4000} = \dfrac{3180.96}{4000} \\ \\ \rm \longrightarrow a = 0.80 \: m {s}^{ - 2} \)

\( \therefore \) Minimum uniform acceleration necessary for the plane to take flight (a) = 0.80 m/s²

a. The Inverse Square Law states that the intensity or strength of a physical quantity decreases with the square of the distance from its source.

b. The values of E and r in the given circuit are: E = 4V (e.m.f. of the cell) and r = ∞

a. In the context of electrostatics, the Inverse Square Law describes the relationship between the electric field strength and the distance from a charged particle.

b. For the first scenario (V = 4V and I = 1A), we have:

4V = 1A * R1,

R1 = 4Ω.

For the second scenario (V = 2V and I = 2.5A), we have:

2V = 2.5A * R2,

R2 = 0.8Ω.

Total resistance in the circuit (when ammeter reads zero current) is given by:

= R1 + R2 + r.

Since the ammeter reads zero current, we have:

E = I * R_total,

4V = 0A * R_total,

R_total = ∞ (infinity).

Therefore, we can conclude that the internal resistance r of the cell is infinite (or very high compared to the resistances in the circuit).

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Answer:

U1 = 56.67 kJ/kg

T1 = 2.46°C

U2 = 83.80 kJ/kg

T2 = 21.55°C

Given that;

m = 10kg           }  from property table Vf = 0.0007772       Uf = 54.92

p1 = 320 kPa    }                                      Vg = 0.063604         Ufg = 176.61

now our specific volume V1 = v/m = 0.014 / 10 = 0.0014

V1 = Vf + x(Vg -Vf)

we substitute

0.0014 = 0.0007772 + x( 0.063604 - 0.0007772)

0.0006228 = 0.0628268x

x = 0.0006228 / 0.0628268

x =  0.0099129

U1 = Uf + x(Ufg)

we substitute

u1= 54.92 + 0.0099129 ( 176.61 )

u1= 56.67 kJ/kg

t1 = tset = 2.46°C

The process is with a constant volume addition

P2 = 600 kPa

V2 = V1 = 0.0014 m^3/kg

from property table

Vf = 0.0008199           Uf = 81.02

Vg = 0.034295            Ufg = 160.81

V2 = Vf + x2 (Vg - Vf)

we substitute

0.0014 = 0.0008199 + x2 ( 0.034295 - 0.0008199 )

0.0005801 = 0.0334751x2

x2 = 0.0005801 / 0.0334751

x2 = 0.017329

U2 = Uf + x2(Ufg)

U2 = 81.02 + 0.017329( 160.81 )

U2 = 83.80 kJ/kg

T2 = Tset = 21.55°C

Answer:

450m

Explanation:

\(s = ut + \frac{1}{2} a {t}^{2} \\ s = 0 + t + \frac{1}{2} a {t}^{2} \\ \frac{1}{2 } \times 9 \times {10}^{2} = 450m\)

The equation that expresses the post-collision velocity as a function of the pre-collision velocity and the masses of the moving and the stationary objects is: v_f = ((m1-m2)/(m1+m2))v_i

where v_f is the final velocity, v_i is the initial velocity, m1 is the mass of the moving object, and m2 is the mass of the stationary object.

Claim: This equation is known as the conservation of momentum equation and is based on the principle that the total momentum of a system is conserved during a collision, assuming no external forces act on the system.

What is collision?

Collision refers to the event in which two or more objects come into contact with each other, often resulting in a change in the velocity, direction, or shape of the objects involved. Collisions can occur between particles, atoms, molecules, and larger objects, and can be either elastic or inelastic, depending on whether or not kinetic energy is conserved during the collision.

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Complete question is: The equation that expresses the post-collision velocity as a function of the pre-collision velocity and the masses of the moving and the stationary objects is: v_f = ((m1-m2)/(m1+m2))v_i

Answer:

His trip took 5.78 seconds

Explanation:

23.7m divided by 4.1m/s = 5.78048780488

Answer:

The speed of the ball is 7.36 m/s

Explanation:

Constant Acceleration Motion

It happens when the velocity of an object changes by an equal amount in every equal period of time.

Being a the constant acceleration, vo the initial speed, vf the final speed, and t the time, the following relation applies:

\(v_f=v_o+at\)

Since the situation corresponds to a vertical motion, the acceleration is g=9.8 m/s^2.

The ball is thrown downward at vo=0.5 m/s. Its speed at t=0.7 seconds is

\(v_f=0.5+9.8\cdot 0.7\)

\(v_f=7.36\ m/s\)

The speed of the ball is 7.36 m/s

Note: There is no use of the height it was released from

When an object is thrown at an angle from the horizontal, the path followed by the body is called the projectile motion. The duration in seconds that the object is above the height of 14 m is 4.698 s.

Speed is the time rate at which velocity is changing.

Vertical speed component is

V₀y = 52sin 30°= 26 m/s

Given is the height h=14m

Using second equation of motion,

S=ut+ 1/2 at²

Substituting the values, we get

14 = 26t - 4.9t²

4.9t² - 26t +14 =0  

Solving the quadratic equation, we get the time as

taking the positive sign, t =4.698 s

taking the negative sign , t = 0.6082 s

Thus, the duration in seconds that the object is above the height of 14 m is 4.698s.

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Answer:

The distance between Jupiter and the Sun is 5.2 AU.

The answer would be A: 5.2 Au away from the sun (AU is the unit that is the same length as the distance between Earth and the Sun)

The mass of skater affects the magnitude of the kinetic and potential energy.

Kinetic energy can be said to be the energy which an object posseses due to motion while potential energy can be said to be the energy stored in an object deu to the position of the object relative to other objects.

The kinetic energy of the skaterboard is based on the mass and velocity of the board. The speed of the board changes while the mass remains the same. Thus, we can say the kinetic energy changes.

The potential energy of the skaterboard is based on the mass of the board, height, and acceleration due to gravity. As the skaterboard moves, the Kinetic energy is converted to potential energy

Answer:

A

Explanation:

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Answer:

A. Stars that have reached the end of their lifetimes because their nuclear fuel

Explanation:

plato

Answer:

=0.5×3.2×1.44

=2.304J

Answer:

the answer is 3.3 %

Explanation:

Answer:

Friction between two objects causes a transfer of electrons from one object to the other.

Explanation:

To calculate the torque required to create an angular acceleration, we can use the formula:

Torque = Moment of Inertia × Angular Acceleration

The moment of inertia of a disk can be calculated using the formula:

Moment of Inertia = (1/2) × Mass × Radius^2

Given:

Mass = 15,000 kg

Radius = 6.14 m

Angular Acceleration = 0.0500 rad/s^2

First, calculate the moment of inertia:

Moment of Inertia = (1/2) × Mass × Radius^2

Moment of Inertia = (1/2) × 15,000 kg × (6.14 m)^2

Next, calculate the torque:

Torque = Moment of Inertia × Angular Acceleration

Torque = Moment of Inertia × 0.0500 rad/s^2

Now, let's plug in the values and calculate:

Moment of Inertia = (1/2) × 15,000 kg × (6.14 m)^2

Moment of Inertia ≈ 283,594.13 kg·m^2

Torque = 283,594.13 kg·m^2 × 0.0500 rad/s^2

Torque ≈ 14,179.71 N·m

Rounding to three significant figures, the torque required to create an angular acceleration of 0.0500 rad/s^2 is approximately 14,180 N·m.

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Answer:

ya it is , affected!okay I think this

Answer:

A. Gamma rays have higher energy than microwaves because gamma rays have shorter wavelengths.

Explanation:

Electromagnetic waves are waves produced by the interaction between both magnetic and electric fields. These waves have some properties that make them to be arranged in a definite form producing an electromagnetic spectrum.

The spectrum has a general property of which as the wavelength of the waves increases, the frequency decreases. And vice versa.

Thus, the energy of the waves increases as the frequency increases.

Gamma rays have higher frequency, but shorter wavelength. While microwaves has lower frequency, but higher wavelength.

Answer:

Yes, the answer is A

Explanation:

The electron number cannot be used instead because electrons can be removed from or added to an atom (option C)

The element of an atom is determined by its proton count, while the electron count can exhibit variability. Take, for instance, a sodium atom, which encompasses 11 protons and 11 electrons. However, it has the capacity to relinquish one electron, transforming into a sodium ion housing only 10 electrons.

This occurs due to the relatively loose binding of electrons to the nucleus, enabling their removal through the influence of an electric field or alternative mechanisms.

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a) The kinetic energy of the spring is 0.2 J

b) Speed of the dart  is 2.8 m/s

Let us recall that work is said to be done when the force that is applied moves a distance in the direction of the force. Now we know that if we compress a spring, then the spring would have a potential energy called the elastic potential energy.

Let us now answer the questions;

a) Given the fact that energy is neither created nor destroyed but is converted from one form to the other, the kinetic energy of the dart is  0.2 J. This is from the law of the conservation of energy as we all know it.

b) Recall that;

KE = 1/2mv^2

KE = kinetic energy

m = mass of the object

v = speed of the object

v = √2KE/m

v =  √2 * 0.2/0.05

v = 2.8 m/s

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Answer:

Distance, S = 440 meters.

Explanation:

Given the following data;

Initial velocity, u = 17m/s

Time, t = 20 seconds

Final velocity, v = 27m/s

To find the distance;

First of all, we would determine the acceleration of the truck.

Acceleration = (v-u)/t

Substituting the given values into the equation, we have;

Acceleration = (27 - 17)/20

Acceleration = 10/20

Acceleration = 0.5m/s²

Now, we would use the second equation of motion to find the distance traveled.

S = ut + ½at²

S = 17*20 + ½*0.5*20²

S = 340 + 0.25*400

S = 340 + 100

S = 440m

The equations of motion can be used to obtain the distance covered as 440 m.

We have to use of the equations that are used for uniformly accelerated motion in solving the problem. The chosen equation must be;

v^2 = u^2 + 2as and v = u + at

v = final velocity

u = initial velocity

a = acceleration

s = distance

To obtain the acceleration;

27 = 17 + 20(a)

27 - 17 = 20a

a = 0.5 ms-2

Now, to obtain the distance;

v^2 = u^2 + 2as

v^2 - u^2/as = s

s = (27)^2 - (17)^2/2(0.5)

s = 440 m

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Answer:

change in kinetic energy of the trolley is 53.91 J.

Explanation:

mass of the trolley, m = 5.0 kg

initial velocity of the trolley, u = 1.0 m/s

external force on the trolley, F = 25 N

time of force action, t = 0.75 s

The final velocity of the trolley at the end of 0.75 s is calculated as follows;

\(F = \frac{m(v-u)}{t} \\\\25 = \frac{5(v-1)}{0.75}\\\\5(v-1) = 18.75\\\\v-1 = \frac{18.75}{5} \\\\v-1 = 3.75\\\\v = 4.75 \ m/s \ in \ the \ direction \ of \ the \ applied \ force\)

The change in kinetic energy of the trolley is calculated as;

Δ K.E = ¹/₂m(v² - u²)

Δ K.E = ¹/₂ x 5(4.75² - 1²)

Δ K.E = 53.91 J.

Therefore, change in kinetic energy of the trolley is 53.91 J.

The average speed of the whole journey is 54 mph.

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The question is incomplete; However, the height from which the stone is thrown is most likely to be what's required of the question

Answer:

See Explanation

Explanation:

Given

\(Initial\ Speed, u = 12.0m/s\)

\(Time, t = 1.54\ s\)

Required

Determine the height

This question will be answered using the following equation of motion;

\(S = ut + \frac{1}{2}gt^2\)

Take g as 9.8

This gives:

\(S = 12 * 1.54 + \frac{1}{2} * 9.8 * 1.54^2\)

\(S = 12 * 1.54 + \frac{1}{2} * 9.8 * 2.3716\)

\(S = 18.48 + 11.62084\)

\(S = 30.10084\)

\(S = 30.1\ m\) (Approximated)

Hence; Height = 30.1m

Answer:

3

Explanation:

Potential Energy:

The potential energy of an object is the energy due to its position.

Mathematically,

The potential energy depends on three factors,

1. Mass

2. Gravity

3. Height

The potential energy is directly proportional to the mass, gravity, and height of the object.

The options speed and size are straight-away wrong.

Assuming that here location doesn't mean height.

The correct answer would be gravity

In an expression, a graph, or perhaps a table of values, the steady rate of change can indeed be observed. The slope of an equation can be thought of as the constant rate of change.

The rate of variation is considered to be constant if the ratio pf output to input remains unchanged at any given point along function. Constant change rate is also known as slope. Linear functions will have a consistent rate of change.

When anything moves at a fixed, steady pace or at an average speed, it is said to be moving at a constant rate, also known as a uniform rate. For instance, 3 hours pass while driving. In the first hour, it travels 30 miles, in the second hour, 45 miles, and in the third hour, 75 miles.

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Answer:45 m/s north

Explanation: