Answer:
4.29s
Explanation:
Using Newton's equation:
Final velocity = initial velocity + (acceleration)(time)
From the question, we have
acceleration = 5.6m/s^2initial velocity = 0m/sfinal velocity= 24m/sPutting values,
24= 0 +(5.6)(t)
24/5.6=t
4.29s=t
How long does it take sound to travel 3525 meters (speed of sound is 330 m/s)?
You look at yourself in the mirror and notice many of your physical features: your hair color, eye color, your height, dimples, etc. How does DNA relate to the way you look the way you do?
well, you get some DNA from both of your parents, so when you hear the phrase, "You have your mother's eyes!" That means you have some of your mother's DNA that gave you her eye color. The DNA you get from your parents help determine how you look today
An object with projectile motion constantly changes direction.
TRUE
FALSE
Answer:
True
Explanation:
What does a capacitance-type fuel quantity system measure fuel in?
A capacitance-type fuel quantity system measures fuel in terms of capacitance, which is the ability of a material to store an electrical charge.
The system uses probes or sensors in the fuel tanks that create a varying electrical field around them. As fuel is added or removed from the tank, the capacitance changes and the system measures this change to determine the amount of fuel remaining in the tank.
A capacitance-type fuel quantity system measures fuel in an aircraft's fuel tank based on the change in capacitance. Here's a step-by-step explanation:
1. Capacitance is the ability of a component to store electrical energy in an electric field.
2. A capacitance-type fuel quantity system consists of a capacitor with plates submerged in the fuel tank.
3. As the fuel level changes, the dielectric constant between the plates also changes, affecting the capacitance.
4. The system measures the change in capacitance and converts it to an accurate reading of fuel quantity in the tank.
In summary, A capacitance-type fuel quantity system measures fuel based on the change in capacitance caused by the fuel level variation in the tank.
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a ball of mass is dropped. what is the formula for the impulse exerted on the ball from the instant it is dropped to an arbitrary time later?
The formula for the impulse exerted on the ball from the instant it is dropped to an arbitrary time later is:
Impulse = (Final momentum - Initial momentum)
What is impulse?Impulse is a vector quantity having both magnitude and direction, whereas momentum is a vector quantity, but the impulse is not equal to momentum. The impulse is the change in momentum.
If a ball of mass m is dropped from rest, then its initial momentum is zero.
The final momentum of the ball after falling for time t is:
Final momentum = mv
Where v is the velocity of the ball after falling for time t.
Therefore, the impulse exerted on the ball from the instant it is dropped to an arbitrary time later is:
Impulse = (mv - 0) = mv
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calculate the ratio of the drag force on a sports car driving at 100. km/h on a highway in denver at an altitude of 1.60 km to the drag force on that same car driving half that speed at sea level. the density of air is 1.10 kg/m3 at 1.60 km and 1.21 kg/m3 at sea level. type your answer here
The drag force is present everywhere around us. The drag forces appear whenever there is motion in air or water or in any other fluid. The ratio of drag force is 3.63.
What is a drag force?When objects travel through fluids they will undoubtedly experience resistive forces called the drag forces. The drag force always acts in the opposite direction to the fluid flow.
The equation of drag force is:
F = 1/2 ρν²CD A
For the passenger jet Dj = 1/2 Cρ₁Avj²
Prop driven transport Dt = 1/2 Cρ₂Avt²
Dj / Dt = ρ₁vj²/ ρ₂Avt²
(1.10 kg/m³) (1000 km/h)² / (1.21 kg/m³) (500 km/h)²
= 3.63
Thus the ratio of drag force is 3.63.
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If unbalanced forces act on an object, how will it move?
A.It will accelerate in the direction of the net force.
B.It will accelerate in the opposite direction of the net force.
Answer:
A
Explanation:
A car rolls down a ramp in a parking garage. The horizontal position of the car in meters over time is shown below. Graph of vertical position (in meters) on y axis and time (in seconds) on x axis. The initial position is 12 m at t=0 s, and the position decreases linearly to 6 m at t=8 s. Then the position is constant at 6 m until t=16 s, then decreases linearly to 0 m at t=24 s. Graph of vertical position (in meters) on y axis and time (in seconds) on x axis. The initial position is 12 m at t=0 s, and the position decreases linearly to 6 m at t=8 s. Then the position is constant at 6 m until t=16 s, then decreases linearly to 0 m at t=24 s. What is the displacement of the car between 0\text{ s}0 s0, start text, space, s, end text and 24\text{ s}24 s24, start text, space, s, end text? 6 \text mmstart text, m, end text What is the distance traveled by the car between 0\text{ s}0 s0, start text, space, s, end text and 24\text{ s}24 s24, start text, space, s, end text?
Answer:
d_total = 12 m
Explanation:
This is a kinematics problem, in the attachment we can see the problem graph, they ask us how much the distance is worth for all the time of 24 s.
The total distance is
d_total = d₁ + d₂ + d₃
as in the graph the part of d₂ is horizontal (v=0) the distance is zero d₂ = 0
the distance d₁ is
d₁ = 12 -6 = 6 m
the distance d₃
d₃ = 6 -0 = 6 m
therefore the total distance traveled is
d_total = 6 + 0 + 6
d_total = 12 m
Cosmic Connection Definition
Cosmic connections are those individuals who come into our lives to assist us develop and grow. Everything is united, so there is nothing of the sort as a possible gathering. The characters in our world are not thereby some coincidence, but the reason is the vital cosmic connection.
Cosmic connections are people who come into our lives to help us grow and develop spiritually.
What is Cosmic connections?Cosmic Connections is a philosophy exploring the interconnectedness of all living things and the universe. It encourages us to see ourselves as part of a larger cosmic family, recognizing our relationships with the Earth, the stars, and the galaxies.
This interconnection is based on the concept that everything in the universe is connected and can affect each other, and that our lives are not just the result of random chance. These special people help us to develop spiritually and can be seen as guides on our journey. They may come in the form of friends, mentors, teachers, or even strangers. Ultimately, these cosmic connections are here to help us to become the best versions of ourselves.
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T/F observations in the x-ray portion of the spectrum are routinely done from the surface of the earth.
Observations in the X-ray portion of the spectrum are routinely done from the surface of the Earth is a false statement .
The electromagnetic spectrum's infrared region is where the earth emits the most energy. When the energy from the sun reaches the surface of the Earth, 49.4% of it is infrared radiation, 42.3% of it is visible light, and 8.3% of it is ultraviolet radiation.After being received from the sun, energy is reflected back into the atmosphere ( in the form of light ). The energy radiated by the Earth is significantly weaker than the Sun because it is much cooler. As a result, it emits infrared radiation ( long wavelength )As a result, the planet emits the most energy in the infrared region of the electromagnetic spectrum is correct statement .
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A mosquito beats its wings at a rate of about 6,000 wing beats per minute. What is the frequency in Hertz of the sound wave created by the mosquito's wings? b. Assuming the sound wave moves with a velocity of 350 m/s, what is the wavelength of the sound wave generated by the beating wings?
Frequency = 6000 wing beats per minute ÷ 60
= 100 wing beats per second.
Frequency = 100 Hz
Frequency = Velocity/Wavelength
100 Hz =(350m/s)/Wavelength
Wavelength = 3.5m
Two disks are rotating about the same axis Disk A has a moment of inertia of 3.44 kg m2 and an angular velocity of 5.69 rad s Disk B is rotating with an angular velocity of 7.03 rad s The two disks are then linked together without the aid of any external torques so that they rotate as a single unit with an angular velocity of 4.23 rad s The axis of rotation for this unit is the same as that for the separate disks What is the moment of inertia of disk B
Answer:
The moment of inertia of disk B is 0.446 kilogram-square meters.
Explanation:
In this case, the moment of inertia of the disk B can be determined by means of the Principle of Conservation of Angular Momentum, whose model is:
\(I_{A}\cdot \omega_{A} + I_{B}\cdot \omega_{B} = (I_{A} + I_{B})\cdot \omega\) (1)
Where:
\(I_{A}\), \(I_{B}\) - Moments of inertia of disks A and B, in kilogram-square meters.
\(\omega_{A}\), \(\omega_{B}\) - Initial angular velocities of disks A and B, in radians per second.
\(\omega\) - Final angular velocity of the resulting system, in radians per second.
Let suppose that disk A rotates counterclockwise, whereas disk B rotates clockwise and that resulting system rotates counterclockwise. If we know that \(I_{A} = 3.44\,kg\cdot m^{2}\), \(\omega_{A} = 5.69\,\frac{rad}{s}\), \(\omega_{B} = -7.03\,\frac{rad}{s}\) and \(\omega = 4.23\,\frac{rad}{s}\), then the moment of inertia of the disk B is:
\(I_{A} \cdot (\omega_{A} - \omega) = I_{B}\cdot (\omega - \omega_{B})\)
\(I_{B} = I_{A}\cdot \left(\frac{\omega_{A}-\omega}{\omega - \omega_{B}} \right)\)
\(I_{B} = (3.44\,kg\cdot m^{2})\cdot \left(\frac{5.69\,\frac{rad}{s} - 4.23\,\frac{rad}{s} }{4.23\,\frac{rad}{s} + 7.03\,\frac{rad}{s} } \right)\)
\(I_{B} = 0.446\,kg\cdot m^{2}\)
The moment of inertia of disk B is 0.446 kilogram-square meters.
What's the real power of a purely resistive circuit in which the RMS voltage measures 80 volts and the RMS current measures 5 amps?
A. 85 watts
B. 120 watts
C. 240 watts
D. 400 watts
Answer:
D.400 watt
Explanation:
B/c Pave=IrmsVrmsPave=(5)(80)Pave=400 wattwhere Pave = average power
Irms=RMS current &
Vrms=RMS voltage
In your own words describe the relationship between pressure, volume and temperature when talking about a gas.
Answer:
The volume of a given gas sample is directly proportional to it's absolute temperature at constant pressure. The volume of a given amount of gas is inversely proportional to its pressure when the temperature is held constant.
Explanation:
Consider the two points A(-4, -1) and B(2, 7) in the xy-plane. Distances are given in centimeters.
The line of action of a 75 N force goes through the linear segment AB.
Determine the magnitude of the moment of the force (in N*cm) about the origin (0, 0).
Answer should be 195
Consider the two points A(-4, -1) and B(2, 7) in the xy-plane. Distances are given in centimeters. the magnitude of the moment of the 75 N force about the origin is 150 N.
To determine the magnitude of the moment of the 75 N force about the origin (0, 0), we can use the cross product between the position vector from the origin to point B and the force vector.
First, let’s find the position vectors of points A and B with respect to the origin:
Vector OA = (x₁, y₁) = (-4, -1)
Vector OB = (x₂, y₂) = (2, 7)
Next, we can calculate the cross product between the position vector OB and the force vector F:
Moment = |OB × F|
= |(x₂, y₂) × (0, 0, F)|
= |(0, 0, (x₂ * F) – (y₂ * 0))|
= |(0, 0, 2 * F)|
= 2F
Substituting the given force magnitude of 75 N:
Moment = 2F
= 2 * 75 N
= 150 N
Therefore, the magnitude of the moment of the 75 N force about the origin is 150 N. The unit for moments is N*cm, so to convert from Newtons to Newtons*cm, we multiply by 100:
Magnitude of the moment = 150 N * 100 cm
= 15,000 N*cm
= 15,000 cm
However, the answer given in the question is 195 N*cm, which does not match the calculated value. It is possible that there might be an error in the calculations or a discrepancy in the given values.
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What is the SI unit for energy?
Watt
Calorie
Joule
Newton
Answer: joule
Explanation: named after English physicist James Prescott Joule . Joule discovered the relationship between heat and mechanical work, which led to the development of the laws of thermodynamics.
Which two statements describe how ultrasound technology produces an image of a baby before it is born?
A. An image is created based on the frequency of reflected X-rays.
B. Body tissues absorb high-frequency sound waves, producing an image.
C. An image is created based on the amount of time it takes for a sound wave to return.
D. Tissues in the baby's body reflect high-frequency sound waves.
Answer:
C,D
Explanation:
an image is created based on the amont of time it takes for a sound wave to return
Tissues in the babys body reflect high-frequency sound waves
In ultrasound scanning, an image of internal organs is created based on the amount of time it takes for a sound wave to return.Thus, option C is correct.
What is ultrasound scanning?High-frequency sound waves are used in ultrasound imaging, also known as sonography, to view within the body. Real-time ultrasound imaging allows for the display of blood flowing via blood vessels as well as movement of the body's internal organs.
Contrary to X-ray imaging, ultrasonic imaging does not expose patients to ionizing radiation.A transducer (probe) is positioned either on the skin or inside a bodily orifice during an ultrasonic examination.
To allow the ultrasonic waves from the transducer to pass through the gel and into the body, a small coating of gel is placed to the skin.
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suppose that you lift an object by exerting an upward force of 12 newtons on it. if gravity exerts a force of 5 newtons downward on the object, what is the total force on the object?
There is a 7N total upward force applied on the object. Think about raising anything by exerting a 12 newton force on it. suppose gravity exerts a downward force of 5 newtons on the thing.
A force is an effect with the capacity to change the velocity of an object. An object with mass can change its speed or accelerate as a result of a force (for example, moving from a condition of rest). To describe force, a push or a pull makes intuitive sense. All objects with mass or energy are attracted to one another by gravity, which is a fundamental interaction in physics (from the Latin gravitas, "weight"). Gravity is by far the weakest of the four fundamental interactions; it is around ten times weaker.
Fnet=F-Fg
Fnet = 12 - 5
Fnet = 7N
Therefore , the net force on the object would be 7N.
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Calculate momentum- what is the momentum of the wooden ball after the collision?
Answer:
-32
Explanation:
The probe used in a medical ultrasound examination emits sound waves in air that have a wavelength of 0. 12 mm. What is the wavelength of the sound waves in the patient?a) 0. 54 mm b) 0. 12 mm c) 0. 26 mm d) 0. 027 mm
The wavelength of the sound waves in the patient is 0.54 mm.
We can find frequency v = fλ
f = 340 / 0.00012
f = 2833333.3 Hz
By using v = fλ again
Wavelength is equal to 0.54 mm.
When an object is heated it radiates energy. We have all seen and felt this phenomenon. Some radiation cannot be seen by us, but we can feel it; a wood burning stove radiates infrared light.
We can feel the heat from the stove, and a simple experiment demonstrates that the heat we feel comes from light waves. To stop the heat you only have to hold an object between your face and the stove. As objects get hotter they glow like the burner of an electric stove. As objects continue to be heated they glow brilliantly like the tungsten filament in a light bulb.
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explain why the density of a gas is much less than that of a solid or liquid
Answer:
A gas usually has much lower density than a solid or liquid. ... The molecules or atoms in a gas are much further apart than in a solid or a liquid. Gas molecules or atoms are usually flying around at very high speeds, occasionally bouncing off each other or the walls of the container the gas is in.
A copper wire of length L and diameter D dissipates energy at a rate when the current in the wire is 10 A. A second copper wire of length L has diameter 2D. What current in the second wire would dissipate energy at a rate P ? (A) 2.5 A (B) 5.0 A (C) 10 A (D) 20 A (E) 40 A
The current in the second wire would dissipate energy at a rate of 40 A.
option E.
What current will the second wire dissipate?The current the second wire will dissipate is calculated as follows;
I = V/R
where;
V is the voltage R is the resistanceThe resistance of a wire is given as;
R = ρL/A
where;
L is the length of the wireA is the area of the wirewhen the diameter is 2D and length is L, the new resistance is calculated as;
R = ρL/(2D)²
R = ρL/4D²
The resistance will reduce by a factor of 4, so the current will increase by a factor of 4.
New current = 4 x 10 A = 40 A
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The property of our eyes that makes us perceives a rotating coloured disc as white.
3 A car has a steady speed of 8 m/s.
How far does the car travel in 8 s?
a
b
How long does the car take to travel 160 m?
a. The car travel 64m in 8s.
b .It takes 20s to cover a distance of 160m
we know that speed is equal to distance travelled by an object by time taken.
s=d/t
a. it is given that the speed of the car is 8m/s and the time it takes is 8s so here the distance will be
d=s*t
= 8x8
=64m
b. here it is given that the car travels a distance of 160 m and it has a speed of 8m/s so the time taken by the car to travel 160 m will be
t=d/s
=160/8
=20s
So from the above equations it is clear that s=d/t and the distance covered is 64m in a. and 20s in b.
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if his arms are capable of exerting a force of 1500 n on the rope, what is the maximum speed he can tolerate at the lowest point of his swing? his mass is 88 kg and the vine is 5.4 m long.
The maximum speed the person can tolerate at the lowest point of his swing is 6.3 m/s.
The swinging motion can be analyzed using conservation of mechanical energy. At the highest point, all the potential energy is converted into kinetic energy, and at the lowest point, all the kinetic energy is converted back into potential energy. Therefore, we can use the equation for conservation of energy to find the maximum speed:
potential energy at highest point = kinetic energy at lowest point
mgh = (1/2)mv^2
where m is the mass of the person, g is the acceleration due to gravity, h is the maximum height the person reaches (equal to half the length of the vine), and v is the maximum speed.
Rearranging the equation gives:
v = sqrt(2gh)
Substituting the given values, we get:
v = sqrt(2 x 9.81 m/s^2 x 2.7 m) = 6.3 m/s
Therefore, the maximum speed the person can tolerate at the lowest point of his swing is 6.3 m/s.
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Instead of lifting the box straight up, suppose you push it up a 1. 0- m -high ramp that makes a 30 ∘ degree angle with the horizontal, as shown in (Figure 1). Being clever, you choose a ramp with no friction. How much force is required to push the box straight up the slope at a constant speed?.
The required force to push the box straight up at a constant speed is zero.
Net force on the box at constant speedThe net force on the box is calculated by applying Newton's second law of motion as follows;
∑F = 0
F - Ff = ma
(at constant speed, acceleration is zero)
\(F- F_f = ma\\\\F - 0 = 0\\\\F = 0\)
Thus, the required force to push the box straight up at a constant speed is zero.
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Sound waves cause air to oscillate. What do light waves oscillate?
The titanium shell of an SR-71 airplane would expand when flying at a speed exceeding 3 times the speed of sound. If the skin of the plane is 400 degrees C and the linear coefficient of expansion for titanium is 5x10 -6 /C when flying at 3 times the speed of sound, how much would a 10-meter long (originally at 0C) rod portion (1-dimension) of the airplane expand?
Answer:
The 10-meter long rod of an SR-71 airplane expands 0.02 meters (2 centimeters) when plane flies at 3 times the speed of sound.
Explanation:
From Physics we get that expansion of the rod portion is found by this formula:
\(\Delta l = \alpha\cdot l_{o}\cdot (T_{f}-T_{o})\) (Eq. 1)
Where:
\(\Delta l\) - Expansion of the rod portion, measured in meters.
\(\alpha\) - Linear coefficient of expansion for titanium, measured in \(\frac{1}{^{\circ}C}\).
\(l_{o}\) - Initial length of the rod portion, measured in meters.
\(T_{o}\) - Initial temperature of the rod portion, measured in Celsius.
\(T_{f}\) - Final temperature of the rod portion, measured in Celsius.
If we know that \(\alpha = 5\times 10^{-6}\,\frac{1}{^{\circ}C}\), \(l_{o} = 10\,m\), \(T_{o} = 0\,^{\circ}C\) and \(T_{f} = 400\,^{\circ}C\), the expansion experimented by the rod portion is:
\(\Delta l = \left(5\times 10^{-6}\,\frac{1}{^{\circ}C} \right)\cdot (10\,m)\cdot (400\,^{\circ}C-0\,^{\circ}C)\)
\(\Delta l = 0.02\,m\)
The 10-meter long rod of an SR-71 airplane expands 0.02 meters (2 centimeters) when plane flies at 3 times the speed of sound.
Calculate the normal force and force applied of a box that has a mass of
50kg and that is moving rightward with an acceleration of 7.2m/s^2
Heya!!
For calculate force, lets applicate second law of Newton:
\(\boxed{F=ma}\)
Δ Being Δ
F = Force = ?
m = Mass = 50 kg
a = Aceleration = 7,2 m/s²
⇒ Let's replace according the formula:
\(\boxed{F= 50\ kg * 7,2 m/s^{2}}\)
⇒ Resolving
\(\boxed{ F = 360\ N}\)
Result:
The force is 360 Netwons.
Good Luck!!
Answer the following as true/false and briefly explain why:
a)A wide beam of parallel light enters water at an angle, the beam broadens.
b)A light ray traveling in air be totally reflected when it strikes a smooth water surface if the incident angle is chosen correctly.
c)A person’s legs look longer when standing in waist-deep water.
d)When a light ray enters a different medium, its frequency changes.
The statement "a wide beam of parallel light enters water at an angle, the beam broadens" is true.
The statement "A light ray traveling in air be totally reflected when it strikes a smooth water surface if the incident angle is chosen correctly." is true.
The statement "A person’s legs look longer when standing in waist-deep water" is true.
The statement "When a light ray enters a different medium, its frequency changes" is false.
a) True. When a beam of parallel light enters the water at an angle, the light rays bend due to the change in speed. This bending is called refraction, and it causes the beam to change direction and spread out, thus broadening the beam.
b) True. When a light ray traveling in air strikes a smooth water surface, it can be totally reflected back into the air if the angle of incidence is greater than a certain critical angle. This phenomenon is called total internal reflection.
c) True. When a person stands in waist-deep water, the light rays from their legs bend due to the refraction at the air-water interface. This makes the legs appear to be longer than they actually are, as the brain interprets the light rays as if they are coming from a more distant point.
d) False. When a light ray enters a different medium, its frequency remains constant, while its speed and wavelength change due to the change in the medium's refractive index. This is described by Snell's law of refraction.
Statements A, B, and C are true while D is false.
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