Ivy and Violet have measured their Buggy Car to have an average speed of 68.0 cm/s. Ms. Sterling has challenged them to release their car from a specific location such that it reaches a finish line in 4.10 seconds. How far from the finish line (in cm) should Ivy and Violet release the car?

Answer: rats and mice

Explanation: because they are small and easy and more ethical

Answer:

B. Rats and mice

Explanation:

They use rodents more as a test subject, so the answer would be B. Rats and Mice.

I hope it helps! Have a great day!

Answer:

Heat

Explanation:

Answer:

Heat conduction, also called diffusion, is the direct microscopic exchange of kinetic energy of particles through the boundary between two systems.

Explanation:

Explanation:

When there is a constant unbalanced force applied in the same direction as the motion, speed will increase and acceleration will remain constant. When there is an increasing unbalanced force applied in the same direction as the motion, speed will increase and acceleration will increase.

According to newton's 2nd law

F = ma

F ∝ a

meaning when F increases , a increases and vice versa

R₁ = 28. 535 v  and  R₂  10.125 Ω  are the resistance are wired in series with a battery.

Let  R₁  and R₂ be the  two Resistance

resistance - which resists the flow of current.

R₁ - Resistance of 1st resistor

R₂ - Resistance of 2nd resistor

V = Voltage = 12V

I = O.31A ( in series)

I  = 1.6 A ( in parallel)

when two resistance connected in series then

Rs = R₁ + R₂

V = IRs = 12 /0.31 V

R₁+R₂ = 38.700Ω   (equation1.)

When two resistance connected in parallel then the value of R is.

    [tex]R_{p} =\frac { R_{1} R_{2}}{R_{1} + R_{2} }[/tex]

V = I Rp

V=  I (R₂ R₁ /R₁ +R₂)

R₁ R₂ = 290.25 Ω  

As we know

(R₁ - R₂ ) ² = (R₁ + R₂ ) ² - 4R1R2

Using above values we get,

 (R₁ - R₂ ) ²  = (38.70) ²  - 4x 290.25

 (R₁ - R₂ ) ²   = 336.69  Ω  

R₁ - R₂ = 18.34     (equation 2 )

Using equation 1 and 2 we get

R₁+ R₂ = 38.70 52

R₁ - R₂ = 18.34

R₁ = 28.535 Ω  

Using the value of  R₁ in equation 1 we get

R₂ = 38·700 -  28.535

R₂ = 10.125 Ω  

R₁ = 28. 535 v  and  R₂  10.125 Ω  are the resistors are wired in series with a battery.

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Answer:

burns

Explanation:

Answer:

.98m

Explanation:

Answer:

4 meters............

.

.

.

.

.

Answer:

C.

Explanation:

kase anjan na yung sagot ohh

Answer: decibels

Explanation:

Answer:

Answer: B. 12 N

Explanation:

Static Equilibrium

Static equilibrium occurs when an object is at rest, i.e., neither rotating nor translating.

In the static rotational equilibrium, the total torque is zero with respect to any rotational axis.

The torque applied by a force F perpendicular to a displacement X with respect to a reference rotating point is:

T = F*X

Considering the pivot as the rotating point, there are 3 forces producing torque. Let's consider counterclockwise torques as positive, thus:

30N * 40 cm - 60 N * 30 cm + F (30 cm + 20 cm) = 0

Operating:

1200 N.cm - 1800 N.cm + F(50 cm) = 0

- 600 N.cm + F(50 cm) = 0

Solving for F:

F = 600/50

F = 12 N

Answer: B. 12 N

Answer:

This equation for acceleration can be used to calculate the acceleration of an object when its mass and the net force acting on it are known.

so it wa The equation for the acceleration can be rewritten as to calculate the nets force acting on an object when its mass and acceleration

Answer: F=ma

Explanation:

1. The phone is moving with a velocity of 20.77 m/s before racking into pieces

2. The time taken for the ball to come back to their hand is 0.82 s

3. The maximum height reached by the batarang is 49.03 m

4. The cliff is 1016.06 m high

5. The object is moving with a velocity of –8.6 m/s after 2 s

v² = u² + 2gh

v² = 0² + (2 × 9.8 × 22)

v² = 431.2

Take the square root of both side

v = √431.2

v = 20.77 m/s

We'll begin obtaining the time taken to reach the maximum height. This is illustrated below:

v = u – gt (since the ball is going against gravity)

0 = 4 – (9.8 × t)

0 = 4 – 9.8t

Collect like terms

0 – 4 = –9.8t

–4 = –9.8t

Divide both side by –9.8

t = –4 / –9.8

t = 0.41 s

Finally, we shall determine the time for the entire trip

T = 2t

T = 2 × 0.41

T = 0.82 s

v² = u² – 2gh (since the ball is going against gravity)

0² = 31² – (2 × 9.8 × h)

0 = 961 – 19.6h

Collect like terms

0 – 961 = –19.6h

–961 = –19.6h

Divide both side by –19.6

h = –961 / –19.6

h = 49.03 m

h = ½gt²

h = ½ × 9.8 × 14.4²

h = 4.9 × 207.36

h = 1016.06 m

v = u – gt (since the ball is going against gravity)

v = 11 – (9.8 × 2)

v = 11 – 19.6

v = –8.6 m/s

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Answer:

inside of our brain and the above the nose

Answer:

acceleration due to gravity is constant anywhere on the earth .its value is 9.8m/s²

The total flux of electric field created by each balloon is 1.7×10^4N/C.

Consider two balloons of diameter 0.200m each with mass 1.00g hanging apart with 0.0500m separation on the ends of string making angles of 10.0° with the vertical.

The electric flux created by each balloon is:

[tex]\phi_{e} = \frac{q}{\epsilon_{0} } = \frac{1.2 \times10^{4}C }{8.85\times10^{-12}C^{2}/N \cdot m^{2}} = 1.4 \times 10^{4} N\cdot m^{2}/C\\[/tex]

Gauss Law states that the total electric flux out of a closed surface is equal to the charge enclosed divided by the permittivity. The electric flux in an area is defined as the electric field multiplied by the area of the surface projected in a plane and perpendicular to the field.

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The value of [tex]V_{H}[/tex] is[tex](1.00\times10^{-4} V/T)B[/tex].

What is a magnetic field?

The magnetic influence on moving electric charges, electric currents, and magnetic materials is described by a magnetic field, which is a vector field. A force perpendicular to the magnetic field and its own velocity acts on a moving charge in a magnetic field. The magnetic field of a permanent magnet pulls on ferromagnetic substances like iron and attracts or repels other magnets. A magnetic field that varies with location will also exert a force on a variety of non-magnetic materials by changing the velocity of those particles' outer electrons. Electric currents, like those utilized in electromagnets, and electric fields that change in time produce magnetic fields that surround magnetized things. Since a magnetic field's position can affect both its strength and its direction.

By using the trend line option in excel, we get

[tex]\Delta V_{H} (in\mu V) = 100B[/tex]

[tex]\Delta V_{H} (V)= (\frac{100} {10^{-6} } V/T)B[/tex]

=[tex](1.00\times10^{-4} V/T)B[/tex]

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Answer:

Air slows down The fall of any object including a ball.

A limitation of modeling the effect of gravity on a falling object by using a ball dropped from different heights is: gravity varies slightly at different heights. Hence, option (C) is correct.

Gravity is a fundamental interaction in physics that causes all objects with mass or energy to attract one another. The electromagnetic force is 10³⁶ times stronger than gravity  the weak interaction is 10²⁹ times weaker than gravity, and gravity is by far the weakest of the four fundamental interactions.

As a result, it has no appreciable impact on subatomic particle level phenomena. However, at the macroscopic level, gravity is the most important interaction between things and governs the motion of planets, stars, galaxies, and even light.

As gravity is inversely proportional to the square of distance, it varies slightly at different heights. Hence, option (C) is correct.

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The vertical magnetic field required to keep the rod moving at a constant speed is  IBd=[tex](u_{k} )[/tex]mg.

When describing the distribution of the magnetic force in the area surrounding and inside of a magnetic object, we use the metaphor of a magnetic field.

The most of us are somewhat familiar with common magnetic items and are aware that there may be forces present between them. We know that magnets have two poles, and that two magnets can be attracted (opposite poles) or repellent depending on how they are oriented (similar poles). We understand that this occurs in some area that surrounds a magnet. Described by the magnetic field, this area.

Mathematics uses a vector field to represent the magnetic field. An array of several vectors drawn on a grid can be used to directly plot this vector field.

Explanation:

Given mass of rod ,m

current carrying= I  

Separation between rails =d

The kinetic friction coefficient, uk

The force of magnetic field (F) is perp. to the magnetic field.

Let required magnetic field be B.

Now balancing forces in y-direction,

       N=mg

And. in x-direction,

       F=f

      IBd= [tex]u_{k}[/tex]N

      IBd=[tex](u_{k} )[/tex]mg

B=[tex]\frac{u_{k} mg}{Id}[/tex]

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The final speed of the ball when it accelerate uniformly at a rate of 3.52 m/s² for 23.3 m is 12.81 m/s.

Speed can be defined as the ratio of distance to time.

The S.I unit of speed is m/s.

To calculate the final speed of the ball, we use the formula below.

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

Hence, the final speed of the ball is 12.81 m/s.

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Answer:b

Explanation:

b

Answer:

Radiation

Explanation:

bc Radiation transfers heat through electromagnetic waves.

Answer:

false

Explanation:

The acceleration of a car that starts from rest and accelerates to a speed of 30 m/s in 20 seconds is 1.5 m/s².

Acceleration is defined as the change in velocity of a body or an object with time.

Mathematically;

The acceleration of the car is calculated using the equation of motion as follows:

v = u + a * t

where;

v is the final velocity

u is the initial velocity

t is the time taken

a is the acceleration

From the dat provided: v = 30 m/s, t = 20 s, u = O m/s

a = v - u/t

a = 30 - 0/20

a = 1.5 m/s²

Therefore, the acceleration of the car that starts from rest and accelerates to a speed of 30 m/s in 20 seconds, is 1.5 m/s².

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A person who unintentionally grabs the terminals of a 14-kV power supply while holding body resistance between his palms.

(A) What is the current flowing through the person's body if the power supply's internal resistance is?

(b) Where does his body's power go when it is dispersed?

(c) If the power supply's internal resistance is to be increased in order to make it safer, what internal resistance should it have for the maximum current in the aforementioned scenario to be 1.00 mA or less?

employing ohm's law

a) The equation V = IR, where V is the voltage in volts, I is the current in amperes, and R is the resistance in ohms

R = V / I = 1.50 V/ ( 2.05 /1000) A = 731.71 ohms

b) E = IR + Ir = (731.71 0.0036) Power = IV = v = = = 0.1107 W

Ohm's regulation states that the cutting-edge through a conductor between two factors is without delay proportional to the voltage across the two factors. Introducing the steady of proportionality, the resistance, one arrives at the usual mathematical equation that describes this relationship:

The regulation became named after the German physicist Georg Ohm, who, in a treatise posted in 1827, described measurements of applied voltage and current thru easy electrical circuits containing various lengths of wire.

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Answer:

[tex]{ \rm{A .B = |A| |B| \sin( \theta) }} \\ { \rm{A.B = 5 \times 7 \times \sin(45) }} \\ { \rm{A.B = 35 \times \frac{1}{ \sqrt{2} } }} \\ \\ { \rm{A.B = \frac{35}{ \sqrt{2} } }}[/tex]

rationalise the denominator;

[tex]{ \rm{A.B = \frac{35}{ \sqrt{2} } \times \frac{ \sqrt{2} }{ \sqrt{2} } }} \\ \\ { \rm{A.B = \frac{35 \sqrt{2} }{2} }}[/tex]

Here the sound intensity in the bar is 4.73×10⁹ W/m².

The power carried by sound waves per unit area in a direction perpendicular to that region is known as sound intensity or acoustic intensity. The watt per square meter (W/m²) is the SI unit of intensity, which also covers sound intensity. One use for this technology is to measure the amount of sound energy present in the air near a listener.

According to the question:

The sound intensity in the bar, I = 1/2 ρω²s²v

I = 1/2 (8.92×10³)(2π×500)²(4.63×10⁻³)²(5010)

I = 4.73×10⁹ W/m².

Hence, the sound intensity in the bar is 4.73×10⁹ W/m².

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Answer:

can you put it in a sentence

A copper wire that is 1 mm thick and 30 cm long is connected to a 1 v battery. (the resistivity of copper is 1.69 x 10-8 ω⋅m). The power is 154.82 W.

As we know the formula of Power:

P = V²/R ......(i)

Where,

P = power dissipated, V = voltage R = resistance

Now,

R = Lρ/A .....(ii)

Where,

L = length of the wire, A = cross-sectional area,  ρ = resistivity of the wire.

From eq (i) and eq(ii),

P = V²/(Lρ/A)

P = AV²/Lρ........ (iiI)

Here,

A = πd²/4, Where d = 1 mm

A = (3.14×0.001²/4) = 7.85×10⁻⁷ m²

Putting the value of A and the given values from the question in equation (iii).

P = (7.85×10⁻⁷×1²)/(0.3×1.69 x 10⁻⁸)

P = 154.82 W

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