Force = mass X acceleration. Acceleration due to gravity is 9.8 m/s/s regardless of height or mass. This means a single object will hit the ground with the same force regardless of the height it is dropped from. If this is true, I normally drop a pumpkin from different heights during this unit. why does dropping the pumpkin stay together when dropped from one meter but break apart when dropped from a height of 5 meters?

Answer:

Explanation:

From the given information:

From the rotational axis, the distance of the force of gravity is:

d_g = 25+5.0 cm

d_g = 30.0 cm

d_g = 30.0 × 10⁻² m

However, the relative distance of FB  cos 75.9° from the axis is computed as:

d_B = 5.0 cm

d_B = 5.0 × 10⁻² m

The net torque rotational equilibrium = zero (0)

i.e.

\(\tau_g -\tau_B = 0 \\ \\ F_gd_g -F_gcos 75.9^0 d_B = 0 \\ \\ F_B = \dfrac{F_g d_g}{F_g cos 65.6} \\ \\ F_B = \dfrac{(3.2)(9.8)(30*10^{-2})}{(5.0*10^{-2} * cos 75.9)} \\ \\ \mathbf{F_B = 772.4 N}\)

= 772.4 N

Thus, the force exerted = 1772.4 N

Answer:

the answer is a....,.......

Answer:

C

Explanation:

gravity is a pulling force according to Newton

The equivalent ratio in higher terms to eliminate decimals from the ratio 3.04 to 6 is 76 to 150.

To eliminate decimals from the ratio 3.04 to 6, we can multiply both terms of the ratio by a common factor that will result in whole numbers.

First, let's convert 3.04 to a fraction:

3.04 = 3 + 0.04 = 3 + 4/100 = 3 + 1/25 = 75/25 + 4/100 = 76/25

Now, the ratio 3.04 to 6 can be written as:

3.04/6 = 76/25 / 6

To eliminate the decimal, we can multiply both the numerator and denominator by 25:

(76/25) * 25 / (6 * 25) = 76 / 150

Therefore, the equivalent ratio in higher terms to eliminate decimals from the ratio 3.04 to 6 is 76 to 150.

By multiplying both terms by 25, we effectively scale up the ratio to eliminate the decimal and create whole numbers. This allows us to express the ratio in higher terms without decimals. The final ratio 76 to 150 represents the same relationship as the original ratio 3.04 to 6, but in whole number form.

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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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Answer: Newton's second law of motion

Explanation:

(a) The direction of wave propagation is along the negative z-axis.

(b) The wavelength (λ) is π m, the frequency (f) is approximately 1.59 × \(10^{7}\) Hz, and the wave impedance (Er) is approximately 0.1667 sin (\(10^{8}\) + 2z) ohms.

(c) The magnetic field (H) is (50 sin (\(10^{8}\) + 2z)) / (3 × \(10^{8}\)) ay A/m.

If the direction of wave propagation is specified as along the negative z-axis, we can conclude that the wave is traveling in the opposite direction to the positive z-axis. In the given expression: E = 50 sin(10^8 + 2z) ay V/m

Since the wave is traveling along the negative z-axis, it means that as z increases (in the positive direction), the wave is propagating in the opposite direction.

Hence, the direction of wave propagation for the given wave is along the negative z-axis.

To find the wavelength (λ), frequency (f), and wave impedance (Er), we can relate the electric field (E) and magnetic field (H) components using the wave equation in a nonmagnetic medium:

E = c * H,

where c is the speed of light in the medium, which can be approximated as 3 × \(10^{8}\) m/s in free space.

(a) Direction of wave propagation: Along the positive z-axis.

(b) Calculating λ, f, and Er:

Since the electric field (E) is given as E = 50 sin (\(10^{8}\) + 2z) ay V/m, we can see that the angular frequency (ω) is \(10^{8}\) rad/s and the wave number (k) is 2.

The relationship between wave parameters is given by: c = λ * f, where c is the speed of light.

Using the relation c = ω/k, we can solve for λ and f:

λ = 2π/k = 2π/2 = π m (meters)

f = ω/2π = \(10^{8}\)/2π ≈ 1.59 × \(10^{7}\) Hz (Hertz)

To find the wave impedance (Er), we can use the equation Er = E/H:

Er = E/c = (50 sin (\(10^{8}\) + 2z)) / (3 × \(10^{8}\)) ≈ 0.1667 sin (\(10^{8}\) + 2z) ohms.

(c) The magnetic field (H) can be calculated using the relationship H = E/c:

H = (E/c) = (50 sin (\(10^{8}\) + 2z)) / (3 × \(10^{8}\)) ay A/m.

The direction of wave propagation is along the negative z-axis. (b) The wavelength (λ) is π m, the frequency (f) is approximately 1.59 × \(10^{7}\) Hz, and the wave impedance (Er) is approximately 0.1667 sin (\(10^{8}\) + 2z) ohms. The magnetic field (H) is (50 sin (\(10^{8}\) + 2z)) / (3 × \(10^{8}\)) ay A/m.

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The charge on the segment ds is  \(dQ=\frac{Q}{\pi a}ds=\frac{Q}{\pi a}ad\theta= \frac{Q}{\pi} d\theta\)

As Q is uniformly distributed over semicircel so,charge density

\(\lambda=\frac{Q}{s}=\frac{Q}{\pi r}\)

so in ds region charge: \(dQ=\frac{Q}{\pi a}ds=\frac{Q}{\pi a}ad\theta= \frac{Q}{\pi} d\theta\)

In physics, a uniformly distributed charge refers to a charge distribution where the charge density is constant throughout the given volume or surface. In other words, the amount of charge per unit volume or unit area is the same everywhere within the region.

Uniformly distributed charge is an important concept in electrostatics, which is the study of the behavior of electric charges at rest. The electric field produced by a uniformly charged object has a particularly simple form, and this makes it easier to calculate the electric field at any point outside the charged object using Gauss's Law.

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the complete question is:

What is the charge on a segment ds?

Express your answer in terms of some, all, or none of the variables Q, a, θ, dθ, and the constant π.

Answer:

Vy = 4.43 m/s

Explanation:

given data

velocity = 9 m/sec

angle horizontal = 29.5 degrees

solution

we get here ball initial vertical velocity will be here

Vy = v sinθ       ...........................1

put here value and we get

Vy = 9 × sin(29.5 )  

Vy = 4.43 m/s

Answer:

5.67 m/s

Explanation:

The speed of a wave can be calculated as the distance traveled by the wave divided by the time taken:

Speed = Distance/Time

In this case, the distance traveled by the wave is the length of the pool, which is 17 m. The time taken by the wave to travel this distance is 3 seconds.

So, the speed of the wave can be calculated as:

Speed = 17 m/3 s

Speed = 5.67 m/s

Therefore, the speed of the water wave in the 17 m long pool is 5.67 m/s.

The upward component of that force is 1039.23 N.

The parallel component of that force is  600N.

The definition of force in physics is: The push or pull on a massed object changes its velocity.

An external force is an agent that has the power to alter the resting or moving condition of a body.

The magnitude of force = 1200 Newtons.

Angle with respect to the ocean = 60°.

The upward component of that force is  = F sin60° = 1200×sin60° N = 1039.23 N.

The parallel component of that force is  = F cos60° = 1200× cos60° N = 600N.

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Answer:  1)Scientists seek to acquire: scientific hypothesis

2)A scale measures the weight of a light object: 0.240 lbs

3)What does the process of scientific inquiry: It starts with a problem to solve or a question to answer

4)A mouse in a maze scurries 41 cm south: 76 cm southwest

5)When might an object's average velocity be equal to its average speed in two dimensions:

If the object moves in a straight line in one direction represented as positive, then the magnitude of average velocity will be equal to the average speed.

6)Using the velocity versus time graph, calculate the acceleration of Object A: 3 m/s^2

7)What is the range of a bullet fired horizontally at a height of 1.5m: 66.4m

8)What two vertical forces act on a falling leaf: weight, friction

9)What is equal and opposite to the applied force: spring force

10)Using the free-body diagram, calculate the net force: 12N, right

11)How does the force of impact during a collision change: it increases

12)The threads of a screw used to fasten two pieces of wood: by increasing the normal force exerted by the wood on the screw thread

13)A 60 kg skier with an initial velocity of 12 m/s coasts up a hill: 2.5m

14)A 1,500 kg car’s speed changes from 30 m/s to 15 m/s: -506,250 (negative 506,250| NOT POSITIVE)

15)What is true about weather: The weather depends on so many conditions that it is not possible to account for them all in any model.

16)A student records the mass of objects A, B, C, and D:  A

17)Newton’s cradle is a contraption where metal balls: friction force

18)In a closed system, an object with a mass of 10 kg: 12kgm/s

19)Given the data, what is the kinetic energy of the: 3J

20)A wedge is a simple machine that is essentially two: A length of 12 in. and a thickness of 2 in.

21)Object A and Object B are at equal distances on opposite: 3/4

22)A geosynchronous satellite has an orbital period of 24: 35,900 km

23)Calculate the eccentricity for the planet if the: 0.0167

24)A planet travels in its orbit close to apogee : the same amount of time

25)If astronomers discovered a new planet and found its: 22.3 AU

Explanation:

Hope this helps you guys!!! <3 (this is for 'A Semester Exam')

Answer:

Explanation:

What the heck is a p.d.? I'm going to assume it is voltage potential as measured on opposite ends of each transformer winding with infinite load resistance.

1) False

A step up transformer could convert 120 vac to 150 vac

2) 100 V

Change in voltage is proportional to change in winding counts.

3)

The induced voltage occurs in the secondary coil

4)

Kind of a trick question because a car battery is a direct current source and cannot be used in a transformer to change voltage to drive a power device. If one were to use an inverter to create an alternating current with the same peak voltage and run that through a transformer with turns ratio 12.6 primary : 200 secondary or roughly 1:16, then the possibility exists.

5)

Again, a trick question as a battery is a direct current source.

If one did connect a battery to a transformer, then during the inrush phase after initial connection, the secondary side of the transformer would see a voltage of

9.0(45/54) = 7.5 V

After a few milliseconds the secondary side would show 0V

Answer:

The less energy a wave has, the smaller the amplitude

Explanation:

Hope this helps!!!

Answer:

B: When they want to copy the signal easily

People prefer a digital signal to an analog signal for storing information.Because they want to copy the signal easily. Option B is correct.

A digital signal is one in which data is represented as a series of discrete numbers.

To reduce the influence of noise in communication, a digital signal is utilized. When compared to analog signals, digital signals convey more information per unit time.

The digital signal has a higher quality throughout long distance transmission. The use of bandwidth is reduced when digital signals are sent.

The two reasons the digital signal is a more reliable way to copy sound recordings than the analog signal are;

A. The digital signal uses a limited number of values.

B. The digital signal is less affected by noise.

People prefer a digital signal to an analog signal for storing information.Because they want to copy the signal easily.

Hence,option B is correct.

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The decision of the country's highest court may then be appealing to that Supreme Court of both the U. S., but only in cases where the issue involves federal law.

In particular, followers of hip-hop, surfing, and post - punk culture will find their clothing appealing. Every person who appreciates streetwear will discover the ideal item thanks to Supreme's wide range of clothing.

Rebellious and distinctive brand image! Despite giving a venture - capital group a 50% ownership in the company, Supreme has been able to keep its skater roots and fan base. To top it all off, the Supremes' emblem is distinctive, outstanding, and simple to recognize.

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The power required to lift the water to the surface at a rate of 0.23 m³/s and at a height of 23m deep is 52.9 kW.

Power is obtained from the ratio of work and time and the power is measured in watts (W). P = W/t where W is the work done by the system and t is the time taken to do work.

From the given,

rate of electric pump = 0.23 m³/s

depth of the well = 23m

density of water = 1000 kg/m³

work done=?

work done (w)= m×g×h, where m is the mass of water, g is the acceleration due to gravity and is equal to 10 m/s², and h is the height.

Density = mass/volume

mass = density ×volume

        = 10³ × 0.23

Work done= 0.23×10³×10×23

                   = 52.9 ×10³ W

work done on the pump is 52.9 KJ

Power = work done / time (time = 1sec)

           = 52.9 × 10³ J/ 1 sec

          = 52.9 kW

Hence, the power to lift the water to the surface is 52.9 kW.

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Answer:

zero

Explanation:

no distance has moved while holding the sheet...so no distance means no workdone..no workdone means no power...

The cannonball experiences a 997.4 W average power transfer from the force of gravity.

The cannonball drops from rest the same distance that it did when it was simply dropped (refer to diagram below). Yet, the projectile's horizontal motion is unaffected by the gravity present.

The cannonball's gravitational potential energy, which is determined by the following formula, is equal to its potential energy when it is at rest on the tower.

PE = mgh

PE = (18.0 kg)(9.81 m/s²)(height of tower)

When the cannonball strikes the ground, it has the following kinetic energy:

KE = (1/2)mv²

The following factors determine the cannonball's kinetic energy at impact:

v = gt

v = (9.81 m/s²)(1.15 s) = 11.27 m/s

Substituting m = 18.0 kg and v = 11.27 m/s, we get:

KE = (1/2)(18.0 kg)(11.27 m/s)² = 1146.56 J

As a result, the typical power transmission is:

P = W/t = 1146.56 J / 1.15 s = 997.4 W

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Answer:

Effective resistance of two equal resistors in series is twice that of a single resistor and in essence will reduce the amount of current flowing in the circuit.

Explanation:

When two resistors are connected in series, their effective resistance is the sum of their individual resistances. For example, given two resistors of resistance values R₁ and R₂, their effective resistance, Rₓ is given by;

Rₓ = R₁ + R₂            --------------(1)

If these resistors have equal resistance values, say R, then equation 1 becomes;

Rₓ = R + R

Rₓ = 2R

This means that their effective resistance is twice of their individual resistances. In other words, when two equal resistors are in series, their effective resistance is twice the resistance of each single one of those resistors.

Now, according to Ohm's law, voltage(V) is the product of current (I) and resistance (R). i.e

V = IR

I = \(\frac{V}{R}\)

We can deduce that current increases as resistance decreases and vice-versa.

So, if the two equal resistors described above are connected in series, the amount of current flowing will be reduced compared to having just a single resistor.

Answer:

A)quadruples

Explanation:

The force between the two charges is directly proportional to the product of the charges and inversely proportional to the square of the distance between them. Hence, if distance between charges is halved (charges remaining kept constant), the force between the two charges is quadrupled

1. Charges qB and qC have different signs.

2. The ratio qC/qB is 9/4.

3. The sign of charge qA must be the same as that of either qB or qC lesser magnitude.

Electric force is the attracting or repulsive interaction between any two charged things. Similar to any force, Newton's laws of motion describe how it affects the target body and how it does so.

1. As net force on qA is zero, charges qB and qC have different signs.

2. The ratio qC/qB is = (3d)²/(2d)² = 9/4.

3. As the net force on qA is zero,  the sign of charge qA must be the same as that of either qB or qC lesser magnitude.

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Answer:

i beleave cuz of the Earth is spherical

Explanation:

Answer:

t = 25.5 min

Explanation:

To know how many minutes does Richard save, you first calculate the time that Richard takes with both velocities v1 = 65mph and v2 = 80mph.

\(t_1=\frac{x}{v_1}=\frac{150mi}{65mph}=2.30h\\\\t_2=\frac{x}{v_2}=\frac{150mi}{80mph}=1.875h\)

Next, you calculate the difference between both times t1 and t2:

\(\Delta t=t_1-t_2=2.30h-1.875h=0.425h\)

This is the time that Richard saves when he drives with a speed of 80mph. Finally, you convert the result to minutes:

\(0.425h*\frac{60min}{1h}=25.5min=25\ min\ \ 30 s\)

hence, Richard saves 25.5 min (25 min and 30 s) when he drives with a speed of 80mph

Answer:

Given that battery V = 12.0 V

Resistance R = 2.0 ohms

a ) current in the battery is I = V /R

                                                = 12.0 V / 2.0

                                                = 6.0 A

b ) charge transported in the circuit is   q = i * t  

                                                                = 6.0 A * 10 s

                                                                 = 60 C

c ) Work done on the charge by the electric field is 0 ( there is no internal resistance )

d ) work done through the resistor is w = P * t

                                                            = ( V)^2 / R * t

                                                            = ( 12.0 V )^2 / 2 *10s

                                                             = 720J

e ) Total work done is equal to work done through the resistor

                       W_total = 720 J

f ) there is no internal resistance hence  E = 0

Answer:

velocity is the speed of something in a particular direction while time is what is measured in hours , minutes and seconds

Answer:

\(\phi=628.3\)

Explanation:

From the question we are told that

Radius \(r=10.0 cm\)

Magnetic field\(B=2T\)

Generally the equation for area of circular path is mathematically given by

 \(Area=\pi r^2\)

 \(A=\pi 10^2\)

 \(A=314.15m^2\)

Generally the equation for Magnetic flux is mathematically given by

 \(\phi=BA\)

 \(\phi=2*314.15\)

 \(\phi=628.3\)

Answer: The scenario violates the second law of thermodynamics.

Explanation: The second law states that heat cannot be converted into work without some loss of usable energy, and that the amount of usable energy in a closed system will always decrease over time. Therefore, the machine described in the scenario cannot exist because it would violate the second law by converting all of the heat into electricity without any loss of usable energy.