How can you tell the direction a river flows

Answer:

True

Explanation:

Solids, Liquids, and Gases are all make up of atoms and molecules.

Answer: mass is both a property of a physical body and a measure of its resistance to acceleration when a net force is applied. An object's mass also determines the strength of its gravitational attraction to other bodies. weight is the weight of an object is the force acting on the object due to gravity. and gravity is a natural phenomenon by which all things with mass or energy—including planets, stars, galaxies, and even light—are brought toward one another.

Explanation: and that is mass weight and gravity

(1) The height reached by cat A is 2.5 m.

(2) The speed of cat A before it hits the ground is 36.4 m/s.

(3) The speed of cat B before it hits the ground is 22.39 m/s.

(4) The time spent in air by cat A than cat B is 1.43 seconds.

The time of motion of cat A is calculated as follows;

h = vt - ¹/₂gt

-23 = 7t - 4.9t²

4.9t² - 7t - 23 = 0

solve the quadratic equation using formula method;

a = 4.9, b = -7, c = - 23

t = 3.0 seconds

The time of motion of cat B is calculated as follows;

h = vt - ¹/₂gt

23 = 7t + 4.9t²

4.9t² + 7t - 23 = 0

solve the quadratic equation using formula method;

a = 4.9, b = 7, c = -23

t = 1.57 seconds

h = u²/2g

h = (7²)/(2 x 9.8)

h = 2.5 m

v = u + gt

v = 7  + 3(9.8)

v = 36.4 m/s

v = u + gt

v = 7  + 1.57(9.8)

v = 22.39 m/s

Time difference = 3 s - 1.57 s = 1.43 seconds

Thus, the height reached by cat A is 2.5 m.

The speed of cat A before it hits the ground is 36.4 m/s.

The speed of cat B before it hits the ground is 22.39 m/s.

The time spent in air by cat A than cat B is 1.43 seconds.

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Answer:

1

Explanation:

Answer:

Force of the ball against the bat

Explanation:

Newton's third law of motion states that for every action, there is an equal and opposite reaction. When a player hits a ball with a bat, the force the player exerted on the ball through the bat gave the ball a push force in the forward direction. This is an action force. Now that an action has been initiated, there must be a reaction according to Newton's third law of motion. The magnitude of the force on the ball equals the magnitude of the force on the bat. The direction of the force on the ball is opposite to the direction of the force on the ball. The ball will give the bat an equal and opposite force trying to push the bat backward by resisting the impact of the bat. This is the reaction. The ball will only move if the applied force is able to overcome the resisting force by the bat.

Where;

is the action force of the bat against the ball.

is the equal and opposite reaction force of the ball towards the ball.

The net electric flux in such gaussian surface is zero.

In a uniform electric field existing in a region of space and contains no charge, it is impossible for there to be an electric flux in such space. This is because flux generated in an electric field is a product of the charge and the permittivity of the free space.

In other words, every field line sent into a given closed surface continues through the interior and is typically directed outward somewhere on the surface if there is no provided net charge there. The net or total electric flux is zero because the negative flux barely equals the positive flux in magnitude.

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Answer:

D By looking all the way to the cosmological horizon, we can see the actual conditions that prevailed all the way back to the first instant of the Big Bang.

Explanation:

Astrophysicists are able to determine the conditions that existed in the early universe, by using instruments such as telescopes to observe and study cosmic horizons. More ideas about the early universe can be found from the thermal light present in cosmic backgrounds.

Scientists study these details that provide an insight into the conditions that existed so many years ago. They have been able to determine that the Big Bang involved so many collisions from these observations.

Answer:

I think it is the last option

Explanation:

As per the question, a pump uses a piston of 15 cm diameter that moves at 2.0 cm/s as it pushes fluid through a pipe. The speed of the fluid when it enters a portion of the pipe that is 3.0 mm in diameter is 5000cm/sec.

The volumetric flow rate refers back to the three-dimensional area occupied by using fluid flowing thru a move section according to time. it's far the ratio of the change within the volume of a flowing fluid to the alternate in time.

According to the question, the volumetric flow rate in the pump and the pipe is the same.

Q = AV

Q = Volumetric flow rate

A = Cross-sectional area

V = Velocity

Q ( pump ) = ( π * 15^2 ) / 4 * 2 = 353.43 cm^3/sec

Q ( pipe ) =  ( π * ( 3/10 )^2 ) / 4 * V = 0.071V

Q ( pump ) = Q ( pipe )

Therefore  0.071V = 353.43

Velocity (V) = 5000 cm/sec

Therefore the speed of the fluid when it enters the pipe is 5000 cm/sec.

Velocity is the directional pace of an object in movement as a demonstration of its rate of change in function as determined from a specific body of reference and as measured by way of a selected standard of time.

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Answer:

The answer in 5m/s

Explanation:

You use the formula s=d devided by t, so in other words, you devide 45 meters by 9seconds and the answer is 5m/s

Answer:

erosion

Explanation:

grows into the eirth each year. the atmosphere and how the worldchanges every year

Answer:

Many forms of energy exist, but they all fall into two basic categories:

Explanation:

Thermal energy is due to the movement, and the kinetic energy associated with this movement, of molecules that make up an object or substance.

Hoped I helped U!! ❤️

Answer:

1.) mechanical energy and 2.) potential energy

Explanation:

Sound is made up of vibrations thermal energy consists of moving molecules in air or in an object, and mechanical energy is the combination of kinetic and potential energy of a moving object.

I hope this helps!!!!

Answer:

621.83grams

Explanation:

Using the formula;

Mole = mass ÷ molar mass

Where;

Mole = mol

Mass = grams

Molar mass = g/mol

According to the information given in this question, number of moles = 3.1mol, mass of Hg = ?, Molar mass (MM) of Hg = 200.59g/lol

Hence, using mole = mass/MM

3.1 = mass / 200.59

mass = 200.59 × 3.1

Mass = 621.829

Mass = 621.83grams

Coach Carver has created a new team game for his students to play. It involves sprinting, tagging, and throwing a ball. Each team consists of 10 to 20 students. Which place is the safest to play the game

Answer:

Football Field

Explanation:

In sporting or gaming activities that involve sprinting, tagging, and throwing a ball. The safest place to play the game is "FOOTBALL FIELD"

This is because the football field is originally designed and created for footballing activities which are deemed spacious and free of danger. There is also evidence in the Olympic sporting activities.

Therefore, in this case, even though there is no option in the question, the correct answer is the Football field.

The frequency [tex]5.3 \times 10^3 \mathrm{~Hz}[/tex]  that the submarine B detects a frequency f' as described by Equation 17.19.

Given:

Submarine A velocity, [tex]v_{s}=11\;m/s[/tex]

Submarine A Frequency, [tex]F = 5.27 \times 10^{3}\;Hz[/tex]

Submarine B velocity, [tex]v_{o}=3\;m/s[/tex]

As the sign of the submarine B frequency is positive. So, The submarine B is moving away from Submarine A. Therefore, The observer from submarine B detects the frequency [tex]f^{'}[/tex]

Using the Doppler Shift formula, we can determine the frequency of the sonar signal that the crewman in submarine B heard:

[tex]\begin{gathered}f_o=f_s\left(\frac{v-v_o}{v-v_s}\right), \\f_o=5.27 \times 10^3 \mathrm{~Hz} \cdot\left(\frac{1533 \frac{\mathrm{m}}{\mathrm{s}}-3 \frac{\mathrm{m}}{\mathrm{s}}}{1533 \frac{\mathrm{m}}{\mathrm{s}}-11 \frac{\mathrm{m}}{\mathrm{s}}}\right)=5.3 \times 10^3 \mathrm{~Hz} .\end{gathered}[/tex]

Hence, the frequency of [tex]5.3 \cdot 10^3 \mathrm{~Hz}[/tex] that the submarine detects a frequency f' as described by Equation 17.19.

A frequency is the quantity of waves produced each second.

A measure of frequency is the number of times in a second that an alternating current (AC) changes from positive to negative. Direct currents do not experience this switching (DC). Hertz is used to measure frequency (Hz) The period is the length of time it takes for an AC current to start at zero, change from positive to negative, and then return to zero (i.e., the length of time it takes to complete one cycle), while the frequency is the reciprocal of the period. In contrast to low frequency, which has fewer waves per second but a longer period, high frequency refers to the number of waves per second and the length of the period.

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Answer:

Evidence

Explanation:

Answer:

B. chemical equation.

Explanation:

This explained to be a short method of representing different symbols and structures that are seen to make up a chemical reaction. It is known to have been formulated by a French chemist Jean Beguin. In a course of writing a chemical reaction, its reaction is seen to show a starting compound which is been written on the left hand side of the said equation while the product is written by the right hand side and are separated in different directions by an arrow. When this is done, charges on this equation that is balanced is also written on each side of the equation.

Answer:

The person delivered a power of 2,558 Watt

Explanation:

Work and Power

Mechanical work is the amount of energy transferred by a force. It's a scalar quantity, with SI units of joules.

Being  the force vector and  the displacement vector, the work is calculated as:

[tex]W=\vec F\cdot \vec s[/tex]

If both the force and displacement are parallel, then we can use the equivalent scalar formula:

W=F.s

Power is the amount of energy transferred per unit of time. In the SI, the unit of power is the watt, equivalent to one joule per second.

The power can be calculated as:

[tex]\displaystyle P=\frac {W}{t}[/tex]

Where W is the work and t is the time.

If the person lifts a mass of m=200 Kg, then exerts a force equal to its weight:

F = m.g = 200*9.8 = 1,960

F = 1,960 N

The work done when lifting the weight 7 times by a distance of s=2.2 m is:

W = 7*1,960*2.2=30,184

W = 30,184 J

Finally, the power delivered in t=11.8 seconds is:

[tex]\displaystyle P=\frac {30,184}{11.8}[/tex]

P = 2,558 Watt

The person delivered a power of 2,558 Watt

   The value of the acceleration of the earth toward it when it accelerates toward the earth with 9.8m/s² is a = 7.35×10-²³m/s².

   Forces are the definition of Newton's second law, which is stated under the relation:

∑ Force = mass × acceleration.

  In other words, force is the origin of motion since it generates acceleration in a system.

   In this case we must complete the statement:

"A student with mass 45 kg jumps off a high diving board. Using 6. 0×1024 kg for the mass of the earth, what is the acceleration of the earth toward her as she accelerates toward the earth with an acceleration of 9. 8 m/s2 ? assume that the net force on the earth is the force of gravity she exerts on it."

  We determine the Force of the student:

F = ma

F = 45kg * 9.8m/s².

F = 441N

  Now we go to the acceleration of the earth:

a = F/m

a = 441N / 6×10²⁴ Kg

a = 7.35×10-²³m/s².

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Answer:

the answer is dielectric

hope helps you

Explanation:

Answer:

dielectric

Explanation:

edge

Answer:

F = 16 N

Explanation:

Given that,

Mass of the ball, m = 7 kg

Speed of the ball in circular motion, v = 3 m/s

The radius of the string, r = 4 m

We need to find the centripetal force of a ball on a string in circular motion. The formula for the centripetal force is given by :

[tex]F=\dfrac{mv^2}{r}[/tex]

Putting all the values in the above formula

[tex]F=\dfrac{7\times (3)^2}{4}\\\\=15.75\ N[/tex]

or

F = 16 N

Hence, the correct option is (c).

Answer:

the sun

Explanation:

that is how the solar system works

Answer:

3. There would be no sound.

Explanation:

Sound is produced by vibrations that travel through a medium, most commonly through air.

If there is no matter to vibrate (such as in the vacuum of space) then there's no way for a sound wave to be produced.

Thus the answer is option 3. There would be no sound.

Answer:

[tex]\displaystyle \frac{x}{\sin x} = \sum^{\infty}_{n = 0} \frac{(2n + 1)!}{(-1)^nx^{2n}}[/tex]

General Formulas and Concepts:

Calculus

Differentiation

Sequences

Series

Taylor Polynomials

Power Series

Explanation:

*Note:

You could derive the Taylor Series for sin(x) using Taylor polynomials by differentiation by usually you have it memorized.

We want to obtain an infinite amount of derivatives of the given:

[tex]\displaystyle \frac{x}{\sin x}[/tex]

We know that a power series is defined as an infinite derivatives of a function. We know that the power series for sin(x) is:

[tex]\displaystyle \sin x = \sum^{\infty}_{n = 0} \frac{(-1)^nx^{2n + 1}}{(2n + 1)!}[/tex]

Divide x by the power series to obtain our derivatives:

[tex]\displaystyle \frac{x}{\sin x} = \sum^{\infty}_{n = 0} \frac{x}{\frac{(-1)^nx^{2n + 1}}{(2n + 1)!}}[/tex]

Simplify this down:

[tex]\displaystyle \frac{x}{\sin x} = \sum^{\infty}_{n = 0} \frac{(2n + 1)!}{(-1)^nx^{2n}}[/tex]

And we have our final answer.

Topic: AP Calculus BC (Calculus I + II)

Unit: Power Series

Answer:

Wouldn’t his or hers speed be 10m?

Explanation:

because 60 divided by 6 = 10

so 10m per second?

The velocity the 5 Kg shot put would have, given the data from the question is 4 m/s

Momentum is defined as the product of mass and velocity. It is expressed as

Momentum = mass × velocity

We'll begin by calculating the momentum of the 1 Kg ball. This can be obatined as follow:

Momentum = mass × velocity

Momentum = 1 × 20

Momentum = 20 Kg.m/s

Momentum = mass × velocity

20 = 5 × velocity

Divide both sides by 5

Velocity = 20 / 5

Velocity of 5 Kg = 4 m/s

Thus, the 5 Kg shot put will have a velocity of 4 m/s

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59.00 m is the calculated distance.

Distance is the sum of an object's movements, regardless of direction. Distance can be defined as the amount of space an object has covered, regardless of its starting or ending position. The International System of Units defines a meter as the distance unit. It's interesting to note that many other derived units or quantities, such as volume, area, acceleration, and speed, may be constructed using this as the basic unit and a few formulae.

V = V₀ + at = 4.30 + 3.00*5.00 = 19.30 m/s

d = V₀t + (1/2) at²

= 4.30*5.00 + (1/5.00) ² = 59.00 m

or

d = (1/2) (V₀+V) t

= (1/2) (4.30+19.30) (5.00)

= 59.00 m

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Hello!

He will miss it by ≈ 0.852 m

Begin by finding the amount of time necessary to hit the target. Use the formula t = d / s:

t = 75 / 180 = 0.4167 sec

Use the equation d = vi + 1/2at² to solve for the amount the bullet will miss the target. (vi is 0 in this instance). We are solving for the vertical component, so use a  = 9.81 m/s (gravity).

d = 0 + 1/2(9.81)(0.4167²)

d ≈ 0.852 m

This is the schematic of a circuit where there are two capacitors in parallel with each other, and in series with the battery, switch, and resistor.

A resistor is a two-terminal electrical component that produces electrical resistance in circuits. In electrical circuits, resistors can limit current flow, regulate signal levels, divide voltages, bias active components, and terminate transmission lines, among other functions. High-power resistors can be used as test loads for motor controllers, power distribution systems, and generators because they can produce many watts of heat instead of electrical energy. Only sporadically can variations in operating voltage, period of operation, or temperature affect the resistance of fixed resistors. Variable resistors can be used as humidity sensors, chemical activity sensors, force sensors, heat sensors, light sensors, volume controls, lamp dimmers, and light sensors. Resistors are frequently used in both electrical networks and technological gadgets.

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