Jamison turns around 5 times

The correct option is A. which states that in the same liquid, the pressures are equal at all points that are at the same distance below the liquid surface.

This is because the pressure is determined by the weight of the liquid column above it, which is the same for all points at the same depth. The pressure along the vertical walls of the container is not equal because the liquid is in hydrostatic equilibrium which means that the pressure is not the same at all points in the liquid, and since the walls are vertical, the pressure is the same along them. The pressure at any point not touching any immersed objects is not equal to the pressure at any other point not touching any immersed objects because the pressure is determined by the weight of the liquid column above it, which is the same for all points not touching any immersed objects. The pressure is not affected by factors such as sunlight since the pressure at any point  in the sunlight is equal to the pressure at any other point not in the sunlight.

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Elements combine to form compounds. The correct answer is A.

Elements combine with each other in chemical reactions to form compounds. A compound is a substance composed of two or more different elements chemically combined in a fixed ratio by mass. For example, water is a compound composed of hydrogen and oxygen in a fixed ratio of 2:1 by mass.

B. Molecules are formed when two or more atoms combine chemically, but these atoms can be of the same element or different elements. For example, oxygen gas (O2) is a molecule composed of two oxygen atoms.

C. Atoms are the smallest unit of matter that retains the properties of an element. Atoms do not combine to form other atoms or compounds.

D. Mixtures are composed of two or more substances physically mixed together, but the substances retain their individual properties and can be separated by physical means. Mixtures are not formed by the chemical combination of elements. Examples of mixtures include air and saltwater.

Therefore, The correct answer is option A.

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Answer:

no it's opaque

hope this helps

have a good day :)

Explanation:

Answer:

60n left

Explanation:

Do

Here in this scenario, this image is an example of Newton's first Law of Motion.

What is newton's law of motion?

The three fundamental laws of classical mechanics known as Newton's laws of motion describe how an object's motion and the forces acting on it interact. The following is a paraphrasing of these laws:

Isaac Newton first identified the three laws of motion in his 1687 book Philosophies Naturalis Principia Mathematica (Mathematical Principles of Natural Philosophy).

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Answer:

Vy = 80.5 [m/s]

Explanation:

In order to solve this problem we must use the Pythagorean theorem.

V = 90 [m/s]

The components are Vx and Vy:

Therefore:

\(v=\sqrt{v_{x}^{2} + v_{y}^{2} }\)

where:

Vy = 2*Vx ; because one is twice of the other.

\(90 = \sqrt{v_{x}^{2} +(2*v_{x})^{2} }\\ 90 =\sqrt{v_{x}^{2}+4*v_{x}^{2}} \\90 =\sqrt{5v_{x}^{2}} \\90=2.23*v_{x} \\v_{x}=40.25[m/s]\)

and the bigger vector is:

Vy = 40.25*2

Vy = 80.5 [m/s]

The spring constant is 542 N/m.

The height the ball reaches is 37.5 m.

The angular speed of the ball is calculated as follows;

ω = 2π/T

ω = (2π) / (0.13)

ω = 48.33 rad/s

The spring constant is calculated as follows;

ω = √(k/m)

ω² = k/m

ω²m = k

(48.33² x 0.232) = k

542 N/m

v = ωL

v = 48.33 x 0.56 m

v = 27.1 m/s

h = v²/2g

h = (27.1²) / (2 x 9.8)

h = 37.5 m

Thus, the spring constant is 542 N/m.

The height the ball reaches is 37.5 m.

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Answer:

F=65 N

Explanation:

Uniform Acceleration

When an object changes its velocity at the same rate, the acceleration is constant.

The relation between the initial and final speeds is:

\(v_f=v_o+a.t\)

Solving for a:

\(\displaystyle a=\frac{v_f-v_o}{t}\)

Where:

vf  = Final speed

vo = Initial speed

a   = Constant acceleration

t   = Elapsed time

The ball is kicked from rest vo=0 to vf=32.5 m/s in t=0.21 s. Computing the acceleration:

\(\displaystyle a=\frac{32.5-0}{0.21}\)

\(a=154.8\ m/s^2\)

Note: We have shown this result rounded to the nearest tenth, but we kept all the decimals in a scientific calculator for further calculations.

The force needed to accelerate the soccer ball is calculated by:

F = ma

The ball has a mass of m=0.42 kg, thus:

F=0.42*154.8

F=65 N

As mentioned, this result can only be obtained by keeping full precision in the above calculations.

The back emf at 2500 rpm if the magnetic field is unchanged is 100 V for the back emf in a motor is 72 V when operating at 1800 rpm.

The back emf in a motor is proportional to the speed of the motor. Therefore, we can use the following formula to determine the back emf at 2500 rpm:

E2 = E1 × (N2 / N1)

where E1 is the back emf at 1800 rpm, N1 is the speed at which the back emf was measured, E2 is the back emf at 2500 rpm, and N2 is a new speed.

Plugging in the values we get:

E2 = 72 V × (2500 rpm / 1800 rpm)

E2 = 100 V

Therefore, the back emf at 2500 rpm of the motor would be 100 V if the magnetic field is unchanged.

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If an airplane is  is accelerating down a runway at 2.5 m/s². It's velocity changes 2.5 m/s in each second.

Acceleration is the rate at which speed and direction of velocity vary over time. A point or object going straight ahead is accelerated when it accelerates or decelerates.

Even if the speed is constant, motion on a circle accelerates because the direction is always shifting. Both effects contribute to the acceleration for all other motions.

Hence, the velocity of the airplane changes 2.5 m/s in each second  when it  is accelerating down a runway at 2.5 m/s².

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Answer:

3.03 seconds, 29.51 m/s

Explanation:

To solve this problem, we can use the kinematic equations of motion. The equation we will use is:

y = vi * t + 0.5 * a * t^2

where y is the displacement (height), vi is the initial velocity, a is the acceleration due to gravity (9.81 m/s^2), and t is the time.

At the top of the building, the displacement is 22 m (the height of the building), the initial velocity is 15 m/s (downward), and the acceleration is -9.81 m/s^2 (due to gravity, and negative because it is acting in the opposite direction to the initial velocity).

We can rearrange the equation to solve for time:

y = vi * t + 0.5 * a * t^2

22 = 15t - 0.5 * 9.81 * t^2

0.5 * 9.81 * t^2 - 15t + 22 = 0

Solving for t using the quadratic formula, we get:

t = (-(-15) ± sqrt((-15)^2 - 4 * 0.5 * 9.81 * 22)) / (2 * 0.5 * 9.81)

t = 3.03 s (rounded to two decimal places)

Therefore, it takes approximately 3.03 seconds for the ball to hit the ground.

To find the velocity of the ball when it hits the ground, we can use the equation:

v = vi + a * t

where v is the final velocity (unknown), vi is the initial velocity (15 m/s downward), a is the acceleration due to gravity (-9.81 m/s^2 downward), and t is the time (3.03 s).

Substituting the values, we get:

v = 15 - 9.81 * 3.03

v = -29.51 m/s

The negative sign indicates that the final velocity is in the opposite direction to the initial velocity (upward). However, since we were only asked for the speed (not velocity), we can take the absolute value of the answer to get:

|v| = 29.51 m/s

Therefore, the ball is going approximately 29.51 m/s when it hits the ground below.

Answer:

The fifth harmonic frequency is 2.9 KHz.

Explanation:

For a closed tube, the fifth harmonic frequency is also the second overtone. So that;

fifth harmonic frequency = \(\frac{5V}{4L}\)

where V is the velocity of the sound in air, and L is the length of the tube.

But L = 0.15 m and V = 343 m/s, then:

fifth harmonic frequency = \(\frac{5*343}{4*0.15}\)

                                     = \(\frac{1715}{0.6}\)

                                     = 2858.33 Hertz

fifth harmonic frequency = 2.9 KHz

The fifth harmonic frequency of the soda bottle is approximately 2.9 KHz.

Answer:

2828.33

Explanation:

answer for acellus

Given:

The mass of the dog is,

The potential energy is,

To Find:

The height of the hillside

Explanation:

We know, the potential energy at a height (h), is,

Here, the acceleration due to gravity is,

Substituting the values we get,

Hence, the height of the hilltop is 4.0 m.

Answer:b

Explanation:

Answer:

differences of opinion within rights movements

opposition to reforms in Congress

lack of public support for school desegregation policies

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Answer:

Answer: answer A, B and C are correct

Explanation:

Answer: answer A, B and C are correct

Answer:

er so ue 0.984 kg study your self brhh

Answer:

Below

Explanation:

The 7 kg block is pushing UP on the 6kg block to keep it from falling

   force = ma = 6 kg * 9.81 m/s = 58.9 N

The 6 kg block is pushing DOWN on the 7 kg block with an equal but opposite force    58.9 N

R increases, V is constant and I decrease when you increase the length of the wire in the circuit. Option D is correct.

Ohm's law claims that the voltage across a conductor is directly proportional to the current flowing through it.

When all physical parameters and temperature are constant, Ohm's law claims that the voltage across a conductor is directly proportional to the current flowing through it.

This current-voltage connection may be expressed mathematically as,

The Equation of Ohm's Law

V=IR

The resistance of the circuit is;

\(\rm R= \rho \frac{L}{A}\)

When you increase the length of the wire in the circuit, R increases, V is constant and I decrease,

Hence, option D is correct.

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Answer: Okay so I don't know much but from what I do know

Ultrasound emits sound waves into the body and what bounces back is what they can see the grey shape is what is closest. It's all micro sound waves and cannot hurt an unborn baby.

Explanation:

Not sure if this is correct but it is what I remember being told.

Hope this helps!

Answer:

Explanation:

Force = Mass * acceleration due to gravity.

Given

Mass of the paratrooper = 57kg

Acceleration due to gravity = 9.81m/s²

Required

Force pulling him down

Substitute unto formula;

F = 57 * 9.81

Force = 559.17 N

Hence the force pulling him down is 559.17N

The force pulling the paratrooper as he falls down is 558.6 N.

The given parameters;

The force pulling the paratrooper is force of gravity and the magnitude can be determined by applying Newton's second law of motion as shown below;

F = mg

F = 57 x 9.8

F = 558.6 N

Thus, the force pulling the paratrooper as he falls down is 558.6 N.

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Answer:

3.591 N

Explanation:

Applying,

F = Bvq................. Equation 1

Where F = magnitude of force on the molecule, B = Magnetic field, v = Velocity of the molecule, q = charge of the molecule.

From the question,

Given: B = 0.57 Tesla, q = 9×10⁻⁸ C, v = 7×10⁷ m/s

Substitute these values into equation 1

F = 0.57×9×10⁻⁸×7×10⁷

F = 35.91×10⁻¹

F = 3.591 N

Hence the force on the molecule is 3.591 N

Answer: False

Explanation:

Took the test.

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Rationale:

Ideal mechanical advantage is the ratio of input to output distance moved.

Answer:

  see below

Explanation:

The position graph will be a horizontal line (of constant position) located at the negative value representing the position to the left of the origin.

The velocity graph will be a horizontal line at 0, since the object is at rest.

The acceleration graph will be a horizontal line at 0, since the object's velocity is not changing.

Answer:

5

Explanation:

Answer:

\(f=4.12\times 10^{14}\ Hz\) and \(E=2.73\times 10^{-19}\ J\)

Explanation:

The wavelength of a visible light is 727.3 nm.

\(727.3\ nm=727.3 \times 10^{-9}\ m\)

The formula is as follows :

\(c=f\lambda\)

f is the frequency of the visible light

\(f=\dfrac{c}{\lambda}\\\\f=\dfrac{3\times 10^8}{727.3 \times 10^{-9}}\\\\f=4.12\times 10^{14}\ Hz\)

Energy of a photon is given by :

E = hf, h is Planck's constant

\(E=6.63\times 10^{-34}\times 4.12\times 10^{14}\\\\E=2.73\times 10^{-19}\ J\)

Red color has a frequency of \(4.12\times 10^{14}\ Hz\) and energy per photon is \(2.73\times 10^{-19}\ J\).

46)

Since air resistance is ignored, both cannonballs will fall with the same acceleration due to gravity, which is approximately 9.8 m/s^2. The horizontal velocity of cannonball A does not affect its vertical motion, so it will fall at the same rate as cannonball B.

The time it takes for an object to fall to the ground from a certain height is given by the formula t = sqrt(2h/g), where t is the time, h is the initial height, and g is the acceleration due to gravity.

For cannonball B, which is dropped from a height of 20 meters, the time it takes to reach the ground is:

t = sqrt(2h/g) = sqrt(2*20/9.8) = 2.02 seconds

For cannonball A, which is fired horizontally with a velocity of 5 m/s, the time it takes to reach the ground is also 2.02 seconds, since the vertical motion is the same as cannonball B.

Therefore, both cannonballs will hit the ground at the same time.

47)

The recoil speed of the cannon can be calculated using the principle of conservation of momentum, which states that the total momentum of a system remains constant if no external forces act on it.

Before firing, the total momentum of the system is zero, since the cannon and cannonball A are at rest. After firing, the cannonball A has a momentum of 5 kg * 5 m/s = 25 kg m/s to the right, so the cannon must have an equal and opposite momentum to the left in order to conserve momentum.

The mass of the cannon is 500 kg, so its momentum after firing will be:

p = -25 kg m/s

The velocity of the cannon can be found using the equation:

p = mv

where p is the momentum, m is the mass, and v is the velocity. Solving for v, we get:

v = p/m = (-25 kg m/s) / (500 kg) = -0.05 m/s

Since the momentum of the cannon is negative, the recoil velocity is also negative, indicating that the cannon will move to the left after firing. The magnitude of the recoil velocity is 0.05 m/s, or approximately 0.18 km/h.

Answer:8+3n

Explanation:

Answer:

Is C

Explanation:

To determine which fridge is more cost-effective, we need to calculate the total cost over the 5-year period for each option.For SuperCool Fridge:Total energy used = 780 W × 24 hours/day × 365 days/year × 5 years / 1000 = 341,640 kWh

Total cost of electricity = 341,640 kWh × $0.134/kWh = $45,817.76

Total cost of fridge over 5 years = $650 + $45,817.76 = $46,467.76For Ice Cold Fridge:Total energy used = 675 W × 24 hours/day × 365 days/year × 5 years / 1000 = 296,100 kWh

Total cost of electricity = 296,100 kWh × $0.134/kWh = $39,704.40

Total cost of fridge over 5 years = $700 + $39,704.40 = $40,404.40Therefore, the Ice Cold Fridge is the more cost-effective option over 5 years, even though it has a lower power rating.

Drehex Corporation may need to make trade-offs between cost and time to complete the project, considering the hourly rates and time estimates of their team members.

Corporation may have to make several trade-offs to complete the project based on the cost and time estimates provided. Here are some possible trade-offs they may need to consider:

Ultimately, the trade-offs Drehex Corporation makes will depend on their specific project goals, budget, timeline, and the importance they place on factors such as cost-effectiveness, timeliness, expertise, and quality. Balancing these trade-offs effectively is crucial for successful project completion.

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Answer:

Sample Response: Oracio is the most cost-effective choice because he would cost the least to complete the project. However, he would also take the longest amount of time. Camilla could complete the job the fastest, but she costs more than Oracio. Drehex Corporation will have to decide if it is more important to save money or complete the work quickly to meet the deadline.

Explanation:

Answer:

6.746 ft/s^2

Explanation:

v(t)=50

v(0)=27

t=5/3600 = 1/720 hours

v(t)-v(0)= a(t-0)

50-27= a(1/720)

a= 23*720= 16560 mi/h^2

16560mi/h^2 * 5280/3600^2 (ft/s^2) =6.746 ft/s^2

The acceleration required to increase the speed of a car from 27 mi/h to 50 mi/h in 5 seconds is 6.75 ft/s².

Acceleration is given by:

\( a =  \frac{\Delta v}{\Delta t} = \frac{v_{f} - v_{i}}{t_{f} - t_{i}} \)

Where:

\( v_{f} \): is the final speed of the car = 50 mi/h

\( v_{i}\): is the initial speed of the car = 27 mi/h

\( \Delta t\): is the change in time = 5 seconds

The constant acceleration required is:

\( a = \frac{v_{f} - v_{i}}{\Delta t} \)

\( a = \frac{50 \frac{mi}{h}*\frac{1 h}{3600 s}*\frac{5280 ft}{1 mi} - 27 \frac{mi}{h}*\frac{1 h}{3600 s}*\frac{5280 ft}{1 mi}}{5 s} \)

\( a = 6.75 ft/s^{2} \)  

Therefore, the constant acceleration required is 6.75 ft/s².

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