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What is the value of the force measured by the spring balance? ​

Answer:

The answer is "\(4,500 - 225 \ V\)".

Explanation:

Using formula for calculating the Voltage:

\(M_1=12.5\\\\M_2=250\\\\V_1=4,500 \\\\\bold{\text{Formula: }}\\\\\to \bold{\frac{m_1}{m_2}=\frac{V_2}{V_1}}\\\\\to \frac{12.5}{250}=\frac{V_2}{4,500}\\\\\to 0.05=\frac{v_2}{4,500}\\\\\to 0.05\times 4,500= V_2\\\\\to V_2=225\\\\\)

Hence the range of accelerating in voltage is \(4,500 - 225 \ V\)

Answer:

no

Explanation:

ok

Answer:

(D) x = 93.8 m

Explanation:

v^2 = v0^2 + 2ax

(20 m/s)^2 = (5 m/s)^2 + 2(2 m/s^2)x

Solving for x,

x = 93.8 m

The area of Mrs. Turner's apartment is approximately 0.05304 square feet.

To find the area of Mrs. Turner's apartment, we need to convert the measurements from the scale drawing to the actual measurements in feet, using the given scale factor of 1 inch/18 feet.

Length of apartment in feet = 6.25 inches × (1 foot/18 inches) = 0.34722 feet

Width of apartment in feet = 2.75 inches × (1 foot/18 inches) = 0.15278 feet

Now, we can calculate the area of the apartment in square feet by multiplying the length and width:

Area of apartment in square feet = Length × Width = 0.34722 feet × 0.15278 feet = 0.05304 square feet

Therefore, the area of Mrs. Turner's apartment is approximately 0.05304 square feet.

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Answer:

39.04 J

Explanation:

Definition of work

\(W=fd\)

\(W=\) Work

\(f=\) force

\(d=\) displacement

In this case,

\(f=6.4\)

\(d=6.1\)

\(W=6.4*6.1\)

\(W=39.04\)

The distance deflected from its path due to the Earth's magnetic field after the 2.65 g bullet with a speed of 180 m/s perpendicular to the Earth's magnetic field has traveled 1.25km is 11.38 * \(10^{-10}\) m

F = q v B sin θ

F = m a

F = Magnetic force

q = Charge

v = Velocity

B = Magnetic field

θ = Angle between v and B

m = Mass

a = Acceleration

m = 2.65 g = 2.65 * \(10^{-3}\) kg

v = 180 m / s

B = 5 * \(10^{-5}\) T

q = 1.39 * \(10^{-8}\) C

d = 1.25 km

θ = 90°

F = q v B

s = ut + 1 / 2 at²

t = d / v

s = Vertical distance

d = Horizontal Distance

u = Initial velocity

t = Time

u = 0

a = F / m

s = 1 / 2 at²

s = 1 / 2 * ( F / m ) * ( d / v )²

s = 1 / 2 * ( q v B d² / m v² )

s = 1 / 2 * ( 1.39 * \(10^{-8}\) * 180 * 5 * \(10^{-5}\) * 1.25² / 2.65 * \(10^{-3}\) * 180 * 180 )

s = 1 / 2 * ( 10.86 * \(10^{-13}\) / 477 * \(10^{-3}\) )

s = 11.38 * \(10^{-10}\) m

Therefore, the distance deflected from its path due to the Earth's magnetic field is 11.38 * \(10^{-10}\) m

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a)The speed of the ball at the time of impact will be 8.1 m/sec.

b)The time taken by the ball impacts the surface of trampoline will be 1.1 second.

Speed is defined as the rate of change of the distance or the height attained. it is a time-based quantity. Its SI unit is m/sec.

Given data;

g( gravitational acceleration) = 9.81 m/s2

u (initial velocity of ball) = 2.5 m/s

h₁(initial height of the ball) = 3.0 m

v (speed of the ball at the time of impact ) ?

The time taken by ball for upward journey = u / g

t₁ = u / g

t₁  = (2.5 m/s) / (9.81 m/s2) =

t₁  =0.2548 s

From second equation of motion,upward vertical distance covered by ball is;

\(\rm h_2= \frac{1}{2} gt^2\\\\ h_2=\frac{1}{2} \times 9.81 \times (0.2548)^2\\\\ h_2=0.3184\)

The total distance in the downward direction travelled;

\(\rm h_3=h_1+h_2 \\\\ h_3=3.0+0.3184 \\\\ h_3=3.3184 \ m\)

The time taken for the downward motion is;

\(\rm t_2 = (\frac{2 \times h_3 }{g} )^\frac{1}{2}\\\\ t_2 = 0.825 \ m/sec\)

The speed of the ball at the time of impact is found as;

\(\rm V=gt_2 \\\\ V= 9.81 \times 0.8225 \\\\ V= 8.07 \ m/sec\)

The total time of the flight of ball is;

\(\rm t_3 = t_1+t_2 \\\\ t_3=0.2548+0.8225 \\\\ t_3=1.0774 \ sec\)

Hence,the speed of the ball at the time of impact will be 8.1 m/sec and time taken by the ball impacts the surface of trampoline will be 1.1 second.

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If a planet has an orbital eccentricity equal to 0.70, then its orbit is

Eccentricity is a measure of how squashed an ellipse is compared to a perfect circle.

The value of eccentricity ranges from 0 to 1, where 0 represents a perfect circle and 1 represents a parabolic orbit (which is not a closed orbit).

An eccentricity of 0.70 indicates that the planet's orbit is significantly elongated and not close to a perfect circle.

Therefore, the correct answer is - A very elongated ellipse.

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The current, i, in the circuit by using ohm's law (generalized for alternating currents), v is  \(\begin{aligned}& I= \\& \quad 0.4000+0.8000 i\end{aligned}\)

What is circuit?

An electronic circuit is composed of individual electronic components, such as resistors, transistors, capacitors, inductors and diodes, connected by conductive wires or traces through which electric current can flow.

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We need to find the time it takes an electron to move in the given circuit.

The time taken for electrons to reach the starting motor from the battery is 60.65 minutes.

I = Current = 134 A

\(N_A\) = Avogadro's number = \(6.022\times 10^{23}\ \text{mol}^{-1}\)

A = Area = \(38.9\ \text{mm}^2\)

L = Length = 92.2 cm

\(\rho\) = Density of copper = \(8960\ \text{kg/m}^3\)

M = Molar mass of copper = 63.5 g/mol

\(n_v\) = Number of valence electrons of copper = 1

e = Charge of electron = \(1.6\times 10^{-19}\ \text{C}\)

Number of charge carriers per unit volume is given by

\(n=\dfrac{\rho N_An_v}{M}\\\Rightarrow n=\dfrac{8960\times 6.022\times 10^{23}\times 1}{63.5\times 10^{-3}}\\\Rightarrow n=8.497\times 10^{28}\ \text{m}^{-3}\)

Time taken is given by

\(t=\dfrac{LAne}{I}\\\Rightarrow t=\dfrac{92.2\times 10^{-2}\times 38.9\times 10^{-6}\times 8.497\times 10^{28}\times 1.6\times 10^{-19}}{134}=3638.83\ \text{s}\\\Rightarrow t=\dfrac{3638.83}{60}=60.65\ \text{minutes}\)

The time taken for electrons to reach the starting motor from the battery is 60.65 minutes.

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Time of flight = 1.6 s

Horizontal distance = 64 m

Projectile motion is the form of motion experienced by an object or particle projected into a gravitational field, such as from the surface of the Earth, and moves along a curvilinear path only under the action of gravity.

For the given case,

h = vt + ¹/₂gt²

h = height of tower

v = initial velocity

t = time of flight

55 = 50sin30t + ¹/₂9.8t²

55 = 25t + 4.9t²

4.9t² + 25t - 55 = 0

t = 1.6 s

X = vₓt

X = horizontal distance

vₓ = horizontal velocity

t = time of flight

X =  (50 x cos30) x 1.6

X =  64 m

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2.1 Substance C (melting point is -39°C and boiling point is 357°C) is solid at room temperature.

2.2 Substance D (melting point is -259.14°C and boiling point is -252.87°C)is Hydrogen.

2.3 Substances A ( melting point is -117°C and boiling point is 78°C) and F  (melting point is 0°C and boiling point is 100°C) are liquid at room temperature.

2.4 Substance D ( melting point is -259.14°C and boiling point is -252.87°C) is a gas at room temperature.

2.5 Substance B (melting point is 658°C and boiling point is 2467°C) has the strongest forces between the particles.

2.6 Substance F ( melting point is 0°C and boiling point is 100°C) is water.

Based on the given information:

2.1 The substance with a melting point of -39°C (Option C) is a solid at room temperature (25°C). It remains in a solid state at room temperature.

2.2 The substance with a boiling point of -252.87°C (Option D) is Hydrogen. Hydrogen has a low boiling point, which is below room temperature.

2.3 The substances that are liquid at room temperature (25°C) are:

The substance with a melting point of -117°C and a boiling point of 78°C (Option A)

The substance with a melting point of 0°C and a boiling point of 100°C (Option F)

These substances, which are water and another unknown substance, exist as liquids at room temperature.

2.4 The substance with a melting point of -259.14°C and a boiling point of -252.87°C (Option D) is a gas at room temperature. Its boiling point is below room temperature, indicating that it exists as a gas.

2.5 The substance with the highest melting point (658°C) and boiling point (2467°C) is option B. This substance has the strongest forces between its particles, as indicated by its high melting and boiling points.

2.6 Water is represented by option F, as it has a melting point of 0°C and a boiling point of 100°C, which are the characteristic values for water.

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Answer:i

9E13 ELECTRONS

Explanation:

First we find the number of charges in two hrs

Which is - 2x 7200=- 14400NC

So no of electrons is now q/e

-144x10^-7/-1.6*10^-19

= 9*10^13

One full weather station reports  wave passing a spot every second is equivalent to a frequency of 1 Hz. The frequency is 48=12=0.5 Hz if 4 waves pass a spot in 8 seconds.

The number of cycles that make up a time unit is the frequency. The frequency of a wave with a 30-second period is therefore 1 30 = 0.033 cycles per second, or 0.033 Hertz (Hz).

A wave's speed and wavelength vary as it crosses a border and enters a new medium, but its frequency doesn't.

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The front of the truck is designed to crumple during a collision to absorb the impact energy, slow down the collision, and protect the well-being of the passengers. This design feature helps increase the collision time, reduce the forces acting on the passengers, and minimize the risk of severe injuries.

Danica observes a collision between two vehicles. She sees a large truck driving down the road. It strikes a small car parked at the side of the road. On colliding, the truck applies a force on the stationary car, and the stationary car applies an opposite force on the truck. The front of the truck is designed to crumple in order to absorb the impact energy and slow down the collision , which protects the well-being of the passengers.

During a collision, the principle of Newton's third law of motion comes into play. According to this law, for every action, there is an equal and opposite reaction. In the case of the collision between the truck and the car, the truck exerts a force on the car, pushing it forward, while simultaneously experiencing an equal and opposite force from the car.

The purpose of designing the front of the truck to crumple is to increase the collision time and absorb the kinetic energy. When the truck collides with the stationary car, the front of the truck deforms, crumples, and absorbs a significant amount of the impact energy. This process increases the time over which the collision occurs, reducing the forces acting on the passengers and minimizing the risk of severe injuries.

By allowing the truck to crumple, the kinetic energy of the collision is transformed into other forms, such as deformation energy and heat. This energy transformation helps protect the passengers by reducing the deceleration forces acting on them. It also helps prevent the transfer of excessive forces to the car's occupants and reduces the likelihood of severe injuries.

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P equals 625000 watts The engine provides power during this period, enabling anything to be done or accomplished. political or governmental power

influencing oneself, others, and circumstances This kind of influence comes from personal qualities rather than institutional authority. Personal power is more of a mindset or attitude. Self-efficacy and collaboration skills are important to those with high personal power.

Real power is energy, and as our awareness and self-awareness expand, it grows from within. Being powerful depends on having insight. A person with true authority does not affect the world without taking the larger picture into account.

Work done by the steam engine, W=4500*10³J

Time taken to do work, t = 7.2 seconds

                P=W/t

                  =4500*10³/7.2

                  =625000watt

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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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The measure of arc CD (round to the nearest degree) is 150 degress

The following data were obtained from the question:

Length of arc = 2πr × (θ / 360)

Inputting the given parameters, we can obtain the measure of arc CD as follow:

1.31 = (2 × 3.14 × 0.5) × (θ / 360)

1.31 = (3.14 × θ) / 360

Cross multiply

3.14 × θ = 1.31 × 360

3.14 × θ = 471.6

Divide both sides by 3.14

θ = 471.6 / 3.14

θ = 150 °

Thus, we can conclude that the measure of arc CD is 150 °

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Complete question:

See attached photo

A VfL (Vertical Field LED) backlighting system is commonly used in LCD (Liquid Crystal Display) televisions.

LCD TVs rely on a backlight to illuminate the liquid crystal layer, which controls the passage of light to create the visual image. The VfL technology is a specific type of LED backlighting arrangement used in certain LCD TV models. In a VfL backlighting system, the LEDs (Light-Emitting Diodes) are positioned vertically along the edges of the LCD panel.

The light emitted by these LEDs is directed across the panel using light guides or optical films, illuminating the liquid crystal layer uniformly. One advantage of VfL backlighting is its ability to provide consistent illumination across the LCD panel, reducing any potential inconsistencies in brightness or color uniformity. The vertical orientation of the LEDs allows for more precise control over light distribution, improving overall image quality.

Additionally, VfL backlighting offers potential advantages in terms of power efficiency. By selectively dimming or turning off specific zones of LEDs, local dimming techniques can be employed to enhance contrast and black levels, resulting in improved picture quality while conserving energy. It's important to note that VfL backlighting is just one of several backlighting technologies available for LCD TVs.

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Answer:

D Constant velocity

Explanation:

if it has forces moving on it it has constant velocity

Answer:Magnetic fields from two sources add up as vectors at each point, so the strength of the field is not necessarily the sum of the strengths1. Magnetic fields are vectors, which means they have direction as well as size. Therefore, the sum of two magnetic fields is not simply the sum of their magnitudes2.

Explanation:

The moment of inertia (I) will changes and net torque (Tnet) will also change, while the angular acceleration (a) remains constant.

The formula for net torque acting on an object is given as;

T(net) = Ia

where;

The  moment of inertia of an object is given as;

I ∝ MR²

where;

So mass, M changes, the moment of inertia (I) changes and net torque will also change, while the angular acceleration remains constant.

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Answer:

67500 J

Explanation:

Q = mcΔt.................... Equation 1

Where Q = Amount of heat, m = mass of aluminum, c = specific heat capacity of aluminium, Δt = change or increase in temperature.

From the question,

Given: m = 1 kg, Δt = 75 °C

Constant: c = 900 J/kg.K

Substitute these values into equation 1

Q = 1×900×75

Q = 67500 J

Hence the heat energy required is 67500 J

Answer:

D-Enhancing memory

Explanation:

The total resistance of the circuit is 3 ohms.

The total current in the circuit is 4 A.

The power of the circuit is 48 W.

What is the total resistance of the circuit?

The total resistance of the circuit is calculated as follows;

1 / Rt = 1/R1 + 1/R2 + 1 / R3

1/Rt = 1/6 + 1/12 + 1/12

1/Rt = 0.3333

Rt = 3 ohms

The total current in the circuit is calculated as follows;

I = V / Rt

I = ( 12 ) / ( 3 )

I = 4 A

The power of the circuit is calculated as follows;

P = IV

P = ( 4 x 12 )

P = 48 W

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Answer: The rock

Explanation:

K = 8.93 ⋅ 10 9 N m 2 C 2 hope this helps.