A car is pushed and travels 12 m. The same car is then pushed and it travels 15m. What
could have happened? Select 2 answers.
The mass was decreased
The force was increased
The force was decreased
The mass was increased

Answer:

(b) a real refrigerator

The magnitude of the electric flux through the sheet is 4.05 N m² C⁻¹ (Option E).

The electric flux through a surface is given by the product of the electric field strength and the area of the surface projected perpendicular to the electric field.

In this case, the electric field strength is 18 N C⁻¹, and the area of the sheet projected perpendicular to the electric field is 0.450 m²

(since the normal to the sheet makes an angle of 60° with the electric field). Multiplying these values gives the electric flux:

Electric flux = Electric field strength × Area

Electric flux = 18 N C⁻¹ × 0.450 m²

Electric flux = 8.1 N m² C⁻¹

In summary, the magnitude of the electric flux through the sheet is 4.05 N m² C⁻¹. This value is obtained by multiplying the given electric field strength by the projected area of the sheet perpendicular to the electric field.

The angle of 60° is taken into account to determine the effective area for calculating the flux.(Option E).

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Each of the five friends needs to pay £12 to cover the cost of their own meals and contribute towards the birthday person's meal. Using mean allows us to distribute the cost equally among the friends, ensuring a fair division of expenses for the meal.

To determine how much each of the five friends needs to pay, we can use the concept of averages (mean) and divide the total cost by the number of people paying.

In this scenario, the total cost of the meal for 6 people is £12 per person. Since the other 5 friends have decided to pay for the birthday person's meal, they will collectively cover the cost of their own meals plus the birthday person's meal.

To calculate the total cost covered by the five friends, we can subtract the cost of one person's meal (since the birthday person's meal is being paid by the group) from the total cost. The cost of one person's meal is £12.

Total cost covered by the five friends = Total cost - Cost of one person's meal

= (£12 x 6) - £12

= £72 - £12

= £60

Now, to find out how much each of the five friends needs to pay, we divide the total cost covered by the five friends (£60) by the number of friends (5).

Amount each friend needs to pay = Total cost covered by the five friends / Number of friends

= £60 / 5

= £12

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Answer:

F = -319.2 N

Explanation:

Given that,

The mass of a bicyclist, m = 70 kg

Mass of the bicycle = 9.8 kg

The speed of a bicycle, v = 16 m/s

We need to find the magnitude of the braking force of the bicycle come to rest in 4.0 m.

The braking force is given by :

\(F=ma\\\\=\dfrac{m(v-u)}{t}\\\\=\dfrac{(70+9.8)(0-16)}{4}\\\\=-319.2\ N\)

So, the required force is 319.2 N.

Answer:

it is either constant or zero

Explanation:

Answer:

10N to the left side towards you

Explanation:

The net force is the resultant force that acts on a body.

Force is a push or pull on a body.    

 Push to left side  = 25N

 Pull to the right  = 15N

Net force  = Push to left side   -  Pull to the right  = 25N  - 15N

 Net force  = 10N to the left side towards you

The net force is therefore 10N to the left side towards you

Location F is significant because it demonstrates that there are winters inside the southern hemisphere but that Antarctica has long, dark days and nights.when the winter season in the Hemisphere is in effect

Seasons are a result of the tilt of the Earth's axis; winter occurs when one hemisphere is pointed toward the sun.The beginning of winter is marked by various cultural definitions, some of which base their dates on the weather.In the Southern Quarter, it's indeed summer when it is winter inside the Northern Hemisphere, and conversely.

As a result, the first day of spring, summer, autumn, and winter in temperate regions of the northern hemisphere is March 1.In the temperate zone of the southern hemisphere, spring officially starts on 1 September, winter on 1 December, and fall on 1 March.

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When a rectangular loop of wire has area A it is placed perpendicular to a uniform magnetic field B and spun around one of its sides at frequency f the maximum induced emf is  2πBAf

A magnetic field could be understood as an area around a magnet, magnetic material, or an electric charge in which magnetic force is exerted.

The maximum induced emf is 2πBAf when a rectangular wire loop of area A is spun around one of its sides at frequency f, perpendicular to a uniform magnetic field B.

therefore the correct answer is option C

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Your question seems incomplete, the complete question is as follows

A rectangular loop of wire has area A. It is placed perpendicular to a uniform magnetic field B and then spun around one of its sides at frequency f. The maximum induced emf is:

A. BAf

B. 4πBAf

C. 2πBAf

D. 2BAf

Answer:

Explanation:

Using Hook's law

                 \(F=-kx\)

Answer:

25.1

Explanation:

Answer:4m/s2

Explanation:

It is because if we take the equation of force

F=ma so

a=F/m

Put the values

a=400/100

a=4

Unit of the accelaration is m/s2. So

a=4m/s2

The answer is 4 m/s²

The mass is 100 kg

The force is 400N

The acceleration can be calculated as follows

a= force/mass

= 400/100

= 4 m/s²

Hence the object will move quickly at 4 m/s²

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Answer:

Iodine

Explanation:

fluorine is the most reactive

Answer:

Explanation:

overgeneralization or applying a single solution to a variety of problems without considering their unique characteristics. This is a common issue in math and other problem-solving situations where individuals may rely too heavily on past successful solutions without adjusting for the specific details of each new problem.

Answer:

what you need help on exactly?

Explanation:

Answer:

604.8

Explanation

I multiplied density and volume

Option A) 3.9 km is the correct answer. the magnitude of Rhea's displacement vector is approximately 3.92 km.

In order to find out the magnitude of Rhea's displacement vector, we have to add up all of the displacement vectors.

Then we can use the Pythagorean theorem to calculate the magnitude of the resultant vector.

Since Rhea is first driving north for 2.4 km and then west for 3.1 km, we can represent her displacement vectors as follows: Δx = 0 km and Δy = 2.4 km for the first vector, and Δx = -3.1 km and Δy = 0 km for the second vector.

We can then add these vectors together by adding their components: Δx = 0 km + (-3.1 km) = -3.1 km and Δy = 2.4 km + 0 km = 2.4 km.

This gives us a resultant vector of -3.1 km east and 2.4 km north.

Using the Pythagorean theorem, we can find the magnitude of this vector: \(\sqrt{(\(-3.1 km)^{2} + (2.4 km)^{2} ) } = \sqrt{(9.61 + 5.76) km^{2} } = \sqrt{15.37 km^{2} } \approx 3.92 km.\)

Therefore, the magnitude of Rhea's displacement vector is approximately 3.92 km.

Therefore, option A) 3.9 km is the correct answer.

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Answer:

False.

Explanation:

In physics, acceleration can be defined as the rate of change of the velocity of an object with respect to time.

This simply means that, acceleration is given by the subtraction of final speed from the initial speed all over time.

Hence, if we subtract the final speed from the initial speed and divide that by the time, we can calculate an object’s acceleration.

Mathematically, acceleration is given by the equation;

\(Acceleration (a) = \frac{initial speed - final speed}{time}\)

\(a = \frac{v - u}{t}\)

Where,

a is acceleration measured in \(ms^{-2}\)

v and u is initial and final speed respectively, measured in \(ms^{-1}\)

t is time measured in seconds.

Additionally, acceleration is a vector quantity because it has both magnitude and direction.

Hence, uniform acceleration means the velocity of the body is increasing at a constant rate. For example, an object or body that is experiencing a free fall in a uniform gravitational field is said to be in uniform acceleration.

The magnitude and direction of B at the center C of the square is

2µNIo/πL on every corner of square.

Given that four long straight parallel wires, located at the corners of a square carry equal currents perpendicular to the page.

Side of a square = L

current in square wire = Io

Here C is located at the center then distance from any corner point to center C be r. Here r acts as the hypotenuse such that r = L/√2

We know that electric field (B) = NI/2πr and is same at every point on square. Ba = Bb = Bc = Bd

B = µNIo/2π(L/√2)

B = √2µNIo/2πL

Bnet = 4 x Bcos45 = 4 x √2µNIo/2πL x 1/√2

Bnet = 2µNIo/πL

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The time that the projectile is in the air before landing is 7..92 s if the projectile is launched from the ground with a velocity of 63.6 m/s, directed at an angle of 37.7 degrees.

T = 2 u sin θ / g

T = Total time of flight

u = Initial velocity

θ = Angle of projection

g = Acceleration due to gravity

u = 63.6 m / s

θ = 37.7°

g = 9.8 m / s²

T = ( 2 * 63.6 * sin 37.7° ) / 9.8

T = 77.6 / 9.8

T = 7.92 s

A projectile motion is the motion of a particle launched with some force in air at an angle with the horizontal. The object being launched is called as projectile.

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The object will be moving faster if the acceleration and velocity are pointing in the same direction. The object will also slow down if the acceleration is pointing in the reverse direction as the velocity.

Velocity is the pace and direction about an object's movement, while speed is the tracking at which a object is travelling along a path. To put it another way, velocity is a vector, whereas speed is a scalar value.

Simply said, velocity is the rate of movement in a specific direction. such as the velocity of a car driving north on even a highway or the pace at which a rocket takes off. Since the velocity vector is scalar, its absolute value magnitude will always equal the motion's speed.

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Answer:

deep space ✔️✔️✔️✔️✔️✔️✔️✔️✔️✔️✔️✔️✔️✔️✔️✔️✔️✔️✔️✔️✔️

Answer:

Explanation:

Let B= bead

Q = rod

the electric field at the glass bead pocation is

(Gauss theorem)

E = Q / (2 π d L εo)

the force is

F = q E = q Q / (2 π d L εo)

then

Q = 2 π d L εo F / q

Q = 2*3.14*4x10^-2*10^-1*8.85x10^-12*910x10^-4 / 5x10^-9 = 2.87x10^-8 C = 40.5 nC

Answer:

Correct Answer: B. Beaker A will be 72 °C and beaker B will be 28 °C.

This one is actually right!

Answer:

Static electricity : is a familiar electric phenomenon in which charged particles are transferred from one body to another

Ohm's law : states that the voltage or potential difference between two points is directly proportional to the current or electricity passing through the resistance

The kilogram is an SI base unit that makes up part of the unit of energy, therefore the correct answer is option D

A unit of measurement is a specified magnitude of a quantity that is established and used as a standard for measuring other quantities of the same kind. It is determined by convention or regulation.

The base SI units are meter, kilogram, second, kelvin, ampere, candela, and mole

The unit of energy is Joules which is equivalent in mks unit as Kg m²s⁻²

Thus, The kilogram is an SI base unit that makes up part of the unit of energy, therefore the correct answer is option D

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Answer:

Explanation: hii... PFA The image with the steps for the above question. I hope it’s helpful, thanks!

If a 15kg object is moving with a velocity of 10m/s, the object have kinetic energy of 750 Joule.

According to the definition of kinetic energy in physics, it is the amount of work that an item may accomplish while in motion. As a scalar quantity, kinetic energy can only be fully defined by its magnitude.

Given that:

Mass of the object: m = 15 kg.

Magnitude of velocity of the object: v = 10 m/s.

So, kinetic energy of the object be = 1/2 × mass × velocity²

= 1/2 × 15 × 10 × 10 Joule

= 750 Joule.

Hence, the object have kinetic energy of 750 Joule.

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The symbol used for a magnetic pole is option Ana d B:  "m" and "M" , which are used to indicate North and South magnetic poles.

In physics, a magnetic pole is a point on a magnet where the magnetic field is most concentrated. The north pole of a magnet is the pole that points towards the Earth's geographic north pole, while the south pole of a magnet is the pole that points towards the Earth's geographic south pole.

Therefore, These poles are labeled "N" (for north) and "S" (for south) respectively, but it's also common to use the symbols "m" and "M" to indicate magnetic poles.

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Answer:

5156.37 ft

Explanation:

Given data:

weight ( W ) = 243,000 Ib

Motion of shuttle ; from 189 mi/hr to 101 mi/hr

dv/dt = -0.0002 V^2

I/v * dv/dt = -0.0002 ds

Convert mi/hr to ft/s ( 1 mi/hr = 1.467 ft/s)

189 mi/hr = 277.263 ft/s

101 mi/hr = 148.167 ft/s

After Integrating

In ( 148.167 / 277.263 ) = -0.0002 ( S1 - S2 )

S1 - S2 = -0.627 / -0.0002

S1 - S2 = 3135 ft/s

Now from 101 mi/hr to 35 mi/hr

dv/dt = ( - 0.0002 V^2 + 3.5 )

ds =  V*dv / ( -0.0002 v^2 - 3.5 )

given :  35 mi/hr = 51.345 ft/s

             101 mi/hr = 148.167 ft/s

Integrate

S3 - S2 = - In( 0.0002 v^2 + 3.5 ) / 0.0002 * 2 ]

            = 1644.75 ft/s

S4 - S3 = 376.62 ft/s

attached below is the remaining part of the solution

Total distance travelled = 3135 + 1644.75 + 376.62 = 5156.37 ft

The reflective surface of a concave mirror is curved inward and away from the light source. Concave mirrors focus light inward to a single focal point.

picture B correctly shows the path of the reflected light ray given an object inside the focal point.

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