Calculate the distance moved by a runner who runs with a speed of 5 km/h
and for a period of 0.5 hours.

Answers

Answer 1

Answer:

well at the rate he goes he would be at 2.5km


Related Questions

A meter stick is balanced at the 50-cm mark to create a fulcrum. What mass is required to create a torque of 2.1 N/m 30 cm from the fulcrum?

Answers

Answer:

Explanation:

Torque is measured in N•m not N/m. N/m is units of a distributed load.

I will ASSUME you mean to say 2.1 N•m

m(9.8)(0.30) = 2.1

m = 0.714285714...

m = 0.71 kg

11. Examine the table provided. Which of the objects is producing
the greatest force? *
Object
Mass
Acceleration
Soccer Ball
0.45 kg
5 m/s2
Tennis Ball
0.055 kg
100 m/s2
Marble
0.015 kg
1000 m/s2
Ping Pong Ball
0.020 kg
10 m/s2
a. Soccer Ball
b. Tennis Ball
c. Marble
d. Ping-Pong Ball

Answers

Answer:

b is the answer tennis ball

If the voltage across a circuit element of constant resistance is doubled, how is the current through the circuit element affected

Answers

Answer:

The current through the circuit element will also be doubled.

Explanation:

The relationship between voltage and current of a circuit element is given by Ohm's Law. According to Ohm's Law:

Voltage = (Resistance)(Current)

If the resistance of the element is kept constant, the relation between Voltage and Current through that element becomes as follows:

Voltage = (Constant)(Current)

Voltage α Current

Thus, the voltage is directly proportional to the current for constant value of the resistance.

Therefore, when the voltage across a circuit element of constant resistance is doubled, the current through the circuit element will also be doubled.

a current of a 6 flows through a light bulb for 12 s, how many coulombs of charge pass through the light bulb during this time

Answers

A current of a 6 flows through a light bulb for 12 s. The total charge that passes through the light bulb during the given time is 72 coulombs.

To calculate the total charge that passes through the light bulb, we need to use the formula Q = I * t, where Q represents the charge in coulombs, I represents the current in amperes, and t represents the time in seconds.

Step 1: Identify the known values:

Current (I) = 6 amperes

Time (t) = 12 seconds

Step 2: Calculate the charge using the formula:

Q = I * t

Step 3: Substitute the known values into the formula:

Q = 6 amperes * 12 seconds

Q = 72 coulombs

Therefore, the total charge that passes through the light bulb during the given time is 72 coulombs.

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Imagine you are holding a box in your hand, the force required for you to hold the box with mass 4.54kg and you want to accelerate the box 2m/s2. Move the box in your hand a) upward vertically, b) downward vertically, and c) horizontally. Calculate the magnitudes of forces in the x and y direction.

Answers

Answer:

(a) Fₓ = 0 N

\(F_y\) = 9.08 N

(b)

(a) Fₓ = 0 N

\(F_y\) = 9.08 N

(c) \(F_y\) = 0 N

Fₓ = 9.08 N

Explanation:

The magnitude of the force will remain the same in each case, which is given as follows:

F = ma (Newton's Second Law)

where,

F = force = ?

m = mass = 4.54 kg

a = acceleration = 2 m/s²

Therefore,

F = (4.54 kg)(2 m/s²)

F = 9.08 N

Now, we come to each scenario:

(a)

Since the motion is in the vertical direction. Therefore the magnitude of the force in x-direction will be zero:

Fₓ = 0 N

For upward direction the force will be positive:

\(F_y\) = 9.08 N

(b)

Since the motion is in the vertical direction. Therefore the magnitude of the force in x-direction will be zero:

Fₓ = 0 N

For upward direction the force will be negative:

\(F_y\) = - 9.08 N

(c)

Since the motion is in the horizontal direction. Therefore the magnitude of the force in y-direction will be zero:

\(F_y\) = 0 N

Fₓ = 9.08 N

how much work must be done by the brakes to bring the bike rider to the stop? how far does the bicycle travel if it takes 3.5 seconds to come to rest? what is the magnitude of The breaking Force?

how much work must be done by the brakes to bring the bike rider to the stop? how far does the bicycle
how much work must be done by the brakes to bring the bike rider to the stop? how far does the bicycle

Answers

Answer:

a) The workdone to bring the rider and bicycle to a stop = -4900J

b) △x = 21 m

c) Magnitude of the braki

Explanation:

The total mass of the rider and the bicycle, m = 60 kg + 7.8 kg

m = 67.8 kg

Speed, v = 12 m/s

The initial kinetic energy of the rider and the bicycle is:

KE = 0.5 mv²

KE = 0.5 x 67.8 x 12²

KE = 4881.6 J

KE = 4900 J (to 2 significant figures)

Since both of them are brought to a stop, the final kinetic energy = 0 J

The workdone to bring the rider and bicycle to a stop = Final Kinetic Energy - Initial Kinetic Energy

The workdone to bring the rider and bicycle to a stop = 0 - 4900

The workdone to bring the rider and bicycle to a stop = -4900J

b) The acceleration is calculated as:

\(\begin{gathered} a=\frac{v-u}{t} \\ \\ a=\frac{0-12}{3.5} \\ \\ a=-3.43\text{ m/s}^2 \end{gathered}\)

Calculate the distance using the equation of motion

\(\begin{gathered} v^2=u^2+2aS \\ \\ 0^2=12^2+2(-3.43)S \\ \\ 2(3.43)S=144 \\ \\ 6.86S=144 \\ \\ S=\frac{144}{6.86} \\ \\ S=21\text{ m} \\ \end{gathered}\)

The bicycle travels a distance of 21 m

△x = 21 m

c) The magnitude of the braking force:

\(\begin{gathered} F=\frac{|W|}{d} \\ \\ F=\frac{4900}{21} \\ \\ F=230\text{ N \lparen to 2 significant figures\rparen} \end{gathered}\)

define paralax error pls​

Answers

Answer:

Parallax is a displacement or difference in the apparent position of an object viewed along two different lines of sight, and is measured by the angle or semi-angle of inclination between those two lines.

Altering __________ will be sure to result in an alteration of the speed of the sound wave. Select all that apply.a- the wavelength of the waveb- the period of the wavec- the frequency of the waved- the properties of the mediume- the intensity of the wavef- the amplitude of the wave

Answers

ANSWER:

d- the properties of the medium

STEP-BY-STEP EXPLANATION:

The speed of a wave depends on the properties of the medium through which the wave is moving. A realization in the properties of the medium will result in a change in the speed at which the wave moves through that medium.

Therefore, the only correct option is:

d- the properties of the medium

The efficiency of combine double pulley is 60% How much load is lifted usin SON effort I​

Answers

The load lifted by the double pulley with the given efficiency and applied effort is determined as 30 N.

What is the amount of load lifted?

The amount of load lifted by the pulley is calculated by applying the formula for efficiency of a machine as follows;

E = L / E   x  100%

where;

L is the load overcome or output workE is the effort applied or the input work

The amount of load lifted by the pulley is calculated as;

60 = L / 50   x 100%

60 = 100L / 50

100L = 50 x 60

100 L = 3000

L = 3000 / 100

L = 30 N

Thus, the amount of load lifted by the pulley is 30 N.

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The complete question is below:

the efficiency of combine double pulley is 60%. how much load is lifted using 50n effort​?

what is the most effortless walking speed for a person with 90cm long legs if the length of each step is 90cm​

Answers

Answer:

75 cm/second.

Explanation:

Formula:

Walking speed = stride length / time per step

Walking speed = 90cm/time per step

                         = 90cm/1.2 seconds (a common estimate time per step)

                         = 75cm/second.

A parallel-plate capacitor is constructed of two horizontal 12.0-cm-diameter circular plates. A 1.0 g plastic bead, with a charge of -6.0 nC, is suspended between the two plates by the force of the electric field between them.

Required:
a. Which plate, the upper or the lower, is positively charged?
b. What is the charges on positvie plate?

Answers

Answer:

Please find the answer in the explanation

Explanation:

Given that A 1.0 g plastic bead, with a charge of -6.0 nC, is suspended between the two plates by the force of the electric field between them.

Since it is suspended, it must have been repelled by the bottom negative plate and trying to be attracted to the top plate.

We can therefore conclude that the upper plate, is positively charged

B.) The charge on the positive plate of parallel-plate capacitor is constructed of two horizontal 12.0-cm-diameter circular plates must be less than 6.0 nC

A uniform electric field is directed upward and has a magnitude of 24 N/C. A charge of -6 C is placed in this
field.


The direction of the force on the charge placed in the electric field is upward.
True or False

Answers

The statement" The direction of the force on the charge placed in the electric field is upward" is false because the direction of the force on a negative charge (-6 C) placed in an upward-directed uniform electric field of magnitude 24 N/C would be downward.

The direction of the force on a charged particle placed in an electric field is determined by the charge of the particle and the direction of the electric field. In this case, a charge of -6 C is placed in an electric field directed upward with a magnitude of 24 N/C.

The force on a charged particle in an electric field can be calculated using the formula:

F = q * E

Where F is the force, q is the charge of the particle, and E is the electric field.

Since the charge q in this case is negative (-6 C) and the electric field E is directed upward, we can substitute the values into the formula:

F = (-6 C) * (24 N/C)

F = -144 N

The negative sign in the force value indicates that the force is in the opposite direction to the electric field. Therefore, the force on the charge placed in the electric field is downward, not upward.

The force on a negative charge is always opposite to the direction of the electric field. This is because negative charges experience an attractive force towards positive charges, and electric fields are directed from positive charges to negative charges.

Therefore, the statement "The direction of the force on the charge placed in the electric field is upward." is false.

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A particular car can go from rest to 90 km/h in 10 s. What is its acceleration? (Report your answer in km/h*s)

Answers

Answer: 9 km/h

Explanation:i’m pretty sure

Answer:

Well, it depends on the type of car but a regular car like a toyota 4x4 only goes at 5k/h if the car starts when complete rest

What kind of force is the force of gravity?

Answers

Answer:

Its a Universal Force

Explanation:

Conservative force, i.e work done in close circle is zero

On your vacation, you take a plane from Atlanta to San Francisco (3400 km). The flight takes 4.0 hours. The first ten minutes and the last ten minutes are spent speeding up and slowing down respectively. Therefore, you reach your top speed 10 minutes into the flight. What was your average speed on this flight?

Answers

Answer:  S =  850 km/h = 235.11 m/s

Explanation:

average speed  = total distance : total time elapsed

           distance = 3400 km

           total time = 4 hours

average speed = D : T =  3400 km : 4 h = 850 km/h

[ 850 km /h = 850 000 m : 3600 s = 236.11 m/s ]

a ball is thrown at 200ms-2 and its mass is 0.05 kg what force is necessary to change its direction

Answers

It takes 10N to throw it with that acceleration, but ANY force will change its direction.

If the diameter of the pie is ten inches, the approximate arc length of one slice of pie is select one.

Answers

The arc length of one slice of pie is either 5.24 inches for 6 slices or 3.93 inches for 8 slices.

The arc length of one slice of pie can be found by dividing the circumference of the pie by the number of slices it is cut into.

The circumference of the pie can be found using the formula

C = πd

Where d is the diameter of the pie.

Substituting d = 10 inches,

we get:

C = π × 10 inches ≈ 31.42 inches

If we assume that the pie is cut into n equal slices, then the arc length of one slice is approximately:

Arc length ≈ C/n

If we want an approximate value for the arc length, we can use a value of n that is easy to work with,

such as n = 6 for 6 slices or n = 8 for 8 slices.

For n = 6, the arc length of one slice is approximately:

Arc length ≈ 31.42 inches / 6 ≈ 5.24 inches

For n = 8, the arc length of one slice is approximately:

Arc length ≈ 31.42 inches / 8 ≈ 3.93 inches

Therefore, the approximate arc length of one slice of pie is either 5.24 inches for 6 slices or 3.93 inches for 8 slices.

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in a typical cop movie we see the hero pulling a gun firing that gun straight up into the air and shouting

Answers

It is not recommended to fire a gun straight up into the air.

When a bullet is fired into the air, it will eventually come down and can pose a danger to people and property below. The bullet can still be lethal when it reaches the ground, especially if it lands on a hard surface or hits someone directly.

Additionally, firing a gun in a residential area can be illegal and can result in legal consequences. In general, guns should only be fired in designated shooting ranges or in self-defense situations where there is an immediate threat to life. It is important to handle firearms responsibly and follow all safety guidelines to prevent accidents and injuries.

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5 postulates of neil bohr atomic model​

Answers

Answer:

What is Bohr’s Model of an Atom?

The Bohr model of the atom was proposed by Neil Bohr in 1915. It came into existence with the modification of Rutherford’s model of an atom. Rutherford’s model introduced the nuclear model of an atom, in which he explained that a nucleus (positively charged) is surrounded by negatively charged electrons.

If the instantaneous voltage at a given moment in the circuit RL is V=VmaxSIN(150), then the instantaneous current at the...... same instant I=Imaxsin​

Answers

The instantaneous current at the same moment in the RL circuit can be expressed as I = Imaxsin(150), where Imax represents the maximum current.

1. Given that the instantaneous voltage at a specific moment in the RL circuit is V = Vmaxsin(150).

2. We can express the current at the same moment using Ohm's Law, which states that V = IR, where V is voltage, I is current, and R is resistance.

3. In an RL circuit, the resistance is represented by the symbol R, and it is typically associated with the resistance of the wire or any resistors in the circuit.

4. However, the given equation does not explicitly mention resistance.

5. Since we are considering an RL circuit, it suggests the presence of inductance (L) along with resistance (R).

6. In an RL circuit, the voltage across the inductor (VL) can be expressed as VL = L(di/dt), where L is the inductance and di/dt represents the rate of change of current.

7. At any given instant, the total voltage across the circuit (V) can be expressed as the sum of the voltage across the resistor (VR) and the voltage across the inductor (VL).

8. Therefore, V = VR + VL.

9. Since the given equation represents the instantaneous voltage (V), we can deduce that V = VR.

10. By comparing V = VR with Ohm's Law (V = IR), we can conclude that I = Imaxsin(150), where Imax represents the maximum current.

The specific values of Vmax, Imax, and the phase angle have not been provided in the question, so we are working with the general expression.

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Each circled letter in
the circuit diagram represents a meter that is used to
measure a quantity in the circuit. Which meters show the amount of charge
passing a point each second?
A. A and C
B. A and B
C. B and D
D. C and D

Answers

The meters in the circuit that shows the amount of charge passing a point each second are A and C ( A )

In the circuit, the meter A and C are connected in series to a resistor and the meters B and D are connected parallel to a resistor. Ammeters should be connected in series and voltmeters should be connected in parallel because the resistance in ammeter is zero and the resistance in a voltmeter is infinite.

Ammeter is used to measure the current flowing through a circuit. It can also be said as amount of charge passing through the circuit. Voltmeter is used to measure the voltage across two points in a circuit.

Therefore, the meters in the circuit that shows the amount of charge passing a point each second are A and C ( A )

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3. A boulder drops in the water and creates a wave with a period of 2 s/cycle and a wavelength of
.75 m/cycle. How fast is the wave moving?

Answers

Answer:

The wave moves with a velocity of 37.5 m/s

Explanation:

We know that the speed of a wave is given by:

V = f*λ

Where f is the frequency (the inverse of the period)

Then:

f = 1/T

And we know that T = 2 s/cycle

f = 1/(2 s/cycle) = (1/2) cycle/s

And λ is the wavelength, we know that:

λ = 75m/cycle.

Then the speed of the wave is:

v = ( (1/2) cycle/s)*(75m/cycle) = (75/2) m/s = 37.5 m/s

EXPLAIN HOW MAGNETIC MATERIALS ARE SEPARATED FROM COAL

Answers

A procedure known as magnetic separation can be used to extract magnetic elements from coal.

This method makes use of the magnetic characteristics of some materials to distinguish them from non-magnetic materials like coal. A description of how magnetic separation can be used to remove magnetic components from coal is given below:

Putting a magnetic field around the coal and magnetic material mixture is the first step in the magnetization process. This can be achieved by creating an electromagnetic field or by putting the mixture close to a powerful magnet.

Magnetism: Magnetic materials, such as iron atoms or magnetite that are frequently found in coal, will be drawn to the magnetic field and become magnetized. They line up their magnetic moments with the magnetic field's direction.

Separation: The magnetic coal components can be physically separated from the non-magnetic coal once they have been magnetized. To create this separation, there are numerous techniques:

Magnetic Drum Separator: Using this technique, the mixture is run through a spinning, magnetized drum. The non-magnetic coal can now go along the conveyor belt without being interfered with by the magnetic materials, which adhere to the surface of the drum and are removed from the coal. Magnetic Pulley Separator: This method involves mounting a magnetic pulley at the discharge end of a conveyor belt that is transporting the mixture. The magnetic pulley draws in and gathers the magnetic elements as the belt moves, sending them to a different location for collecting.Magnetic fluid separation includes floating the mixture in a liquid medium and using a magnetic field to draw and separate the magnetic particles. By using filtration or decantation, the magnetic materials can be separated from one another.

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what is photons as in physics ​

Answers

Answer:

The photon,s a type of elementary particle. It is the quantum of the electromagnetic field including electromagnetic radiation such as light and radio waves, and the force carrier for the electromagnetic force.

Explanation:

In which situation is chemical energy being converted to another form of energy?

Answers

Answer:

A burning candle. (chemical energy into energy of heat and light, i.e. thermal and wave)

Explanation:

Given the following data, determine how long it will take your space ship
to travel from Earth to Mars in years.
Distance from Earth to Sun: 150,000,000 km
Distance from Mars to Sun: 230,000,000 km
Maximum Speed of ship: 3,050 km/hr
365 days/year
24 hours/day

Answers

It will take our ship 3 year to  travel from Earth to Mars if the speed is 3,050 km/hr.

What is speed?

The distance travelled per unit of time is most commonly known as speed. It describes how quickly an object moves. The magnitude of the velocity vector is represented by speed, which is a scalar quantity. It's aimless. A faster moving object has a higher speed. It is moving slower if it has a lower speed. It has no speed if it is not moving at all.

The following formula is used to calculate the constant velocity of an object moving in a straight line:

S = d / t

Distance from Earth to Mars = Distance from Mars to Sun - Distance from Earth to Sun

Distance from Earth to Mars = 230,000,000 km - 150,000,000 km

= 2.3 × 10⁸ - 1.5 × 10⁸

=  (2.3-1.5) × 10⁸

= 0.8 × 10⁸

= 8 × 10⁷ km

Time =  Distance ÷ Speed

Given speed = 3,050 km/hr

Distance = 8 × 10⁷ km

Putting the values,

Time =  80,000,000 ÷ 3,050

Time = 26229.51

24 hours a day, so

26229.51/24

= 1092.9

365 days a year, so

1092.9/365

= 2.99 ≈ 3 years

Thus, It will take our ship 3 year to  travel from Earth to Mars if the speed is 3,050 km/hr.

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Water flows through a valve with inlet and outlet velocities of 3 m/s. If the loss coefficient of the valve is 2.0, and the specific weight of water is 9800 N/m3, the pressure drop across the valve is most nearly:

Answers

Answer:

The value is \(\delta P = 9000 \ Pa\)

Explanation:

From the question we are told that

    The inlet and outlet velocity is \(v = 3 \ m/s\)

     The  loss coefficient is  \(k = 2\)

      Th specific weight of water  is  \(w = 9800 \ N/m^3\)

Generally the pressure drop across the valve is mathematically represented as

       \(\delta P = \frac{1}{2} * k * \rho * v^2\)

Here  \(\rho\) is the density which is mathematically represented as

      \(\rho = \frac{w}{g}\)

=>    \(\rho = \frac{9800}{9.8}\)

=>   \(\rho = 1000 \ kg/m^3\)

So

    \(\delta P = \frac{1}{2} * 2* 1000 * 3^2\)

    \(\delta P = 9000 \ Pa\)

A bat emits a sound with a frequency of 134 kHz in a cave where the temperature is 28°C. Assume that air behaves like an ideal monatomic gas and use the fact that the speed of sound in air at 20.0°C is 343 m/s to determine the wavelength of the sound emitted by the bat.

Answers

The wavelength of the sound is 2.6 x 10⁻³ m.

What is the wavelength of the sound?

The wavelength of the sound or distance travelled by the sound wave is calculated by applying the following formula.

v = fλ

λ = v / f

where;

v is the speed of the sound wave = 343 m/sf is the frequency of the sound wave = 134 kHzλ is the wavelength of the sound wave = ?

The wavelength of the sound is calculated as follows;

λ = v / f

λ = ( 343 m/s ) / ( 134,000 Hz )

λ = 2.6 x 10⁻³ m

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The current in a lightning bolt is 2.6 x 105
A.
How much charge passes through a cross-
sectional area of the lightning bolt in 4.1 s?
Answer in units of C.

Answers

Answer:

The right solution is "\(10.66\times 10^5 \ C\)". A further explanation is given below.

Explanation:

The given values are:

Current,

I = \(2.6\times 10^5\)

Time,

t = 4.1 s

As we know,

⇒ \(Q=I\times t\)

On substituting the given values, we get

⇒     \(=2.6\times 10^5\times 4.1\)

⇒     \(=1,066,000 \ C\)

⇒     \(=10.66\times 10^5 \ C\)

Use the following information to answer questions 2-4. Two people are playing a game of
tug-of-war with the rope attached to a mass of 25 kg at the center. The person pulling to
the left pulls with a force of 20 N. The person pulling to the right pulls with a force of 10 N.
2. Which direction will the 25 kg mass move?
a. Left
b. Right
C. It will not move
How do you know?

What will the velocity of the mass be after 1 second?

What will the velocity of the mass be after 2 seconds?

Answers

The direction in which the 25 kg mass will move is to the Left. The correct option is A.

This is because the force pulling to the left is greater than that to the right.

The velocity of the mass after 1 second will be 0.4 m/s

The velocity of the mass after 2 seconds will be 0.8 m/s

What is the net force on the mass of 25 kg?

The net force o the mass of 25 kg is given below:

Net force = 20 N - 10 N

Net force = 10 N

The velocity of the mass is given by the formula below:

Velocity = net force * time / mass

velocity after 1 second = 10 * 1 / 25

velocity after 1 second = 0.4 m/s

velocity after 2 seconds = 10 * 2 / 25

velocity after 2 seconds = 0.8 m/s

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