Answer:
C
Explanation:
the rest are in the respiratory system.
Answer:
C. kidney
Explanation:
respiratory system means an organ that helps you to breathe a nose,lungs,trachea are an organ to help you breathe. However, Kidney is not, this is because the kidney is in the urinary system which means to eliminate waste from the body. The urinary system also includes bladder, ureters, urethra.
Pls help me...
..............
Explanation:
The graphs show maximum gravitational potential energy for the pendulum and they correspond to positions #1 and #5.
In a plate glass factory, sheets of glass move along a conveyor belt at a speed of 15.3 cm/s. An automatic cutting tool descends at preset intervals to cut the glass to size. Since the assembly belt must keep moving at constant speed, the cutter is set to cut at an angle to compensate for the motion of the glass. The glass is 73.4 cm wide and the cutter moves from one edge to the other in 3.0 s. At what angle to the width of the sheet should the cutter be set to move?
n a plate glass factory, sheets of glass move along a conveyor belt at a speed of 15.3 cm/s. An automatic cutting tool descends at preset intervals to cut the glass to size. Since the assembly belt must keep moving at constant speed, the cutter is set to cut at an angle to compensate for the motion of the glass. The glass is 73.4 cm wide and the cutter moves from one edge to the other in 3.0 s. At what angle to the width of the sheet should the cutter be set to move
Can anyone help me please?
Answer:
four times the
Explanation:
...........
Put these components from largest to smallest
1. comet
2. star
3. galaxy
4. nebula
5. planet
6. universe
Answer:
6, 3, 2, 5, 4, 1
Explanation:
Let's describe them from smallest to largest. In fact the size order is not exact as there are exceptions.
An asteroid is a rocky body which lies in the asteroid belt between Mars and Jupiter. They are typically quite small object. The largest asteroid Ceres has been reclassified as a dwarf planet.
A moon is typically a rocky body which is in orbit around a planet. Some moons such as our Moon are quite large and are typically bigger than asteroid. Some moons can actually be smaller than some asteroids.
A planet is a nearly spherical body which is in orbit around the Sun. Planets are larger than moons.
A star is what planets orbit around. It is the source of light and heat. Our Sun is a star which is many times bigger than all of the planets.
A solar system is a star and all of its planets, asteroids, comets and other bodies. It is significantly bigger than a star.
A galaxy, such as our Milky Way Galaxy, is a collection of solar systems orbiting around a central core. Most galaxies have a supermassive black hole at their centres.
Galaxies also form clusters which are large scale structures.
The universe is everything. It contains billions of galaxies.
Which coefficients (in order) would BEST balance this chemical equation?
Answer:
1 N2 +3 H2 ---> 2NH3
Explanation:
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Calculate the mass number of an atom with 8 protons, 12 neutrons and 10 electrons
Answer: 20
Explanation: Mass number is the number of neutrons plus the number of protons. 8 + 12 gives 20.
Mass number
No of protons+No of neutrons12+820Mass number is 20
A boat produces a wave as it passes an aluminum can floating in a lake. Explain why the can merely moves up and down while waves propagate away from the disturbance caused by the boat.
Answer:
Due to waves.
Explanation:
The can merely moves up and down because the movement of the waves that propagate away from the disturbance caused by the boat. The Can has low density due to low mass and high volume which allow the can to float on the surface of water after prevent it from the drowning. The wave moves the can up and down but prevent it from going deep inside the water so we can say that the can moves due to movement of waves in water.
Make a free-body diagram of someone pushing a refrigerator that shows:
a. A net force of 100 N with the refrigerator being pushed to the right.
b. The refrigerator is balanced on the floor.
The free body diagram allows to find the results for the forces applied on the refrigerator are;
a) Free-body diagram with applied force.
b) Free-body diagram without applied force.
A free-body diagram is a diagram of the forces without the details of the body, these diagrams are important to clearly visualize the forces and the coordinate systems against which to take measurements.
In the attached we have a free-body diagrams for a refirerator, represented by the box where the forces are appreciated:
The weight that the forces exerted by the earth on the refrigerator. The Normal which is the reaction of the earth to the support of the refrigerator. The force applied by the person. The friction force which is the force between the two surfaces that opposes the movement of the refrigerator.
Newton's second law states that the net force is proportional to the mass times the acceleration of the body.
∑ F = ma
where F is the force, m the mass and the acceleration
∑ F = F - fr = 100 N
a = 100 / m
In conclusion with the free body diagram we can find the results for the forces applied on the refrigerator are;
a) Free-body diagram with applied force.
b) Free-body diagram without applied force.
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A student is constructing an investigation on static electricity. The student has three balloons and rubs two of them on a piece of wool. The student then touches each balloon to the wall to observe if static electricity would cause the balloon to stick. What is the independent variable in this investigation.
Answer:
Explanation:
As given, the student has three balloons and rubs two of them on a piece of wool. The rubbing of balloon on wool is the independent variable as it was done on two and not on the third as control.
The figure below shows the apparatus used to measure the specific heat capacity of a metal. The electric heater is switched on and supplies 17 000 of thermal energy (heat) to the block of metal. The temperature of the metal rises from 16 °C to 38 °C. The mass of the block of metal is 850 g. No energy is lost from the metal. Calculate the specific heat capacity of the metal.
Answer:
0.909 J/gºC.
Explanation:
From the question given above, the following data were obtained:
Heat (Q) = 17000 J
Initial temperature (T₁) = 16 °C
Final temperature (T₂) = 38 °C
Mass (M) = 850 g
Specific heat capacity (C) =?
Next, we shall determine the change in the temperature of the metal. This can be obtained as follow:
Initial temperature (T₁) = 16 °C
Final temperature (T₂) = 38 °C
Change in temperature (ΔT)
ΔT = T₂ – T₁
ΔT = 38 – 16
ΔT = 22 °C
Finally, we shall determine the specific heat capacity of the metal. This can be obtained as follow:
Heat (Q) = 17000 J
Change in temperature (ΔT) = 22 °C
Mass (M) = 850 g
Specific heat capacity (C) =?
Q = MCΔT
17000 = 850 × C × 22
17000 = 18700 × C
Divide both side by 18700
C = 17000 / 18700
C = 0.909 J/gºC
Therefore, the specific heat capacity of the metal is 0.909 J/gºC.
Which calculates the intensity of an electric field at a point where a 0.50 C charge experiences a force of 20. N?
Answer: [tex]40\ N/C[/tex]
Explanation:
Given
Magnitude of charge is [tex]q=0.5\ C[/tex]
Force experienced is [tex]F=20\ N[/tex]
Electric field intensity is the electrostatic force per unit charge
[tex]\therefore E=\dfrac{F}{q}\\\\\Rightarrow E=\dfrac{20}{0.50}\\\\\Rightarrow E=40\ N/C[/tex]
Thus, the electric field intensity is [tex]40\ N/C[/tex]
16. A student uses 110 N of force to push a box
across a flat room for 7.2 m. Calculate the
amount of work that the student does. Round
your answer to two decimals and show the
correct units of measure.
Answer:
792J
Explanation:
Use the formula Force × Distance
With 110 newtons being the force and 7.2 meters being the distance
Which gives 792 and work us measured in joules therefore its joules
Work done is the dot product of force and displacement. The work done on the box to push across the surface for 7.2 m by applying a force of 110 N is 792 J.
What is force?Force is an external agent acting on a body tp change it from the state of motion or rest. Force is a vector quantity thus, it is characterized by a magnitude and direction.
When force acting on a body results in displacement of the body, it is said to be work done on the body. The work done on the body is the product of force and displacement.
W = F d.
Given the force acting on the box = 110 N
displacement d = 7.2 m
Work done w = 110 N × 7.2 m
= 792 J.
Therefore, the work done on the box is 792 J.
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How to find resultant of all vectors?
Answer:
To draw the resultant vector, join the tail of the first vector with the second vector's head and put the arrowhead. To determine the magnitude, measure the length of resultant R, and to find out the direction, measure the angle of the resultant with the x-axis.
The diagram shows the electric field near conducting sphere a which of the following statements is correct
I need help?? Plz help me
Answer:
12. b
13. a
Explanation:
i’ll give brainliest!! please help and answer correctly! plsss answer quick
Answer:
i dont think anything will happen so maybe A: the wall is larger than you.
Explanation:
All objects on earth experience a force of gravity that pulls objects "downward" towards the center of the earth. The force of gravity acting on a person is 1000 N down and the force of air resistance is 215 N up. Find the net force.
Answer:
The net force is 785 N
Explanation:
The net force = Force in one direction - force in the opposite direction
Here the Downward force due to gravity = 1000N
and the Upward force of air = 215 N
The net force = Downward force due to gravity -Upward force of air
Substituting the given values, we get -
The net force = 1000 -215 = 785 N
Hence, the net force is 785 N
Answer:
I am in 8th grade, and I am learning this, and it is kinda hard, but I appreciate all these people helping people answer thee hard science problems
how does energy apply to newton’s laws?
Answer:
the acceleration of an object is directly pro to the net force acting on it and indirectingly proportional to its mass
Who knows the answers to this’s problems
Answer:1. High Intensity Interval Training
HIIT stands for High Intensity Interval Training. HIIT is essentially a type of exercise, be it cardio or resistance training. HIIT. alternates between periods of high intensity, and low intensity (or recovery
2. flexibility and muscular strength
3. true
4. d
5. c
Explanation:
a volleyball player has spiked the ball. At the instant the ball leaves her hand, it is 2.6 m above the ground and has an initial vertical velocity of -20 m/s. How long will it take the ball to strike the ground if the opposing team doesn't block it?
Answer: 29.48 s
Explanation:
Given
The initial height of the ball is [tex]h=2.6\ m[/tex]
The ball leaves with an initial velocity of [tex]u=-20\ m/s[/tex]
Using the equation of motion
[tex]h=ut+\dfrac{1}{2}at^2\\\text{Insert the values}\\\\2.6=20\cdot t+\dfrac{1}{2}\times 9.8\times t^2\\\\\Rightarrow 9.8t^2+20t-5.2\\\\\Rightarrow t=\dfrac{-20\pm \sqrt{20^2-4\times 9.8\times (-5.2)}}{2\times 9.8}\\\\\Rightarrow t=\dfrac{-20\pm 603.84}{19.8}\\\\\Rightarrow t=29.48\ s\quad [\text{Neglecting negative t}][/tex]
Therefore, it take 29.48 s for ball to reach the ground.
Can someone help me please??
Which is not true about the role of gravity in the formation of planets?
A. Dust and gas particles that were attracted to each other began to rotate into a protoplanetary disk.
B. Gravity between planetesimals caused them to join together into conglomerate clumps.
C. Our solar system is the only place in the universe where gravity played a key part in the formation of planets.
D. Gravity of larger objects in orbit around the sun attracted, and cleared the orbital path of, smaller planetesimals, gas, and dust.
24. ____
Choose the most accurate description of the dimensions of our solar system:
a. The planets are approximately the same size as each other, and orbit at evenly-spaced distances from the sun.
b. Rocky planets are small, dense, and orbit relatively close to the sun, compared to the Jovian planets, which are large, less dense, and orbiting far from the sun.
c. Rocky planets alternate with gas giants as they orbit at even intervals from the sun
d. Gas planets are small, orbiting relatively close to the sun, while large, dense rocky Giants
orbit the sun at great and varying distances.
25. ____ A new object was discovered in the Kuiper Belt. At 6 billion km from the sun, it could be the newest dwarf planet. How many AU is it from the sun? Use 150,000,000 km as Earth’s orbital distance.
a. 90AU b. 9AU c. 400AU d. 40AU
1. Our solar system is the only place in the universe where gravity played a key part in the formation of planets.
2. Rocky planets are small, dense, and orbit relatively close to the sun, compared to the Jovian planets, which are large, less dense, and orbiting far from the sun.
3. _______
a vibrating source with a frequency of 20.0Hz produces water waves that have a wavelength of 3.0 cm. Calculate the speed of the waves 
Answer:
60m/s
Explanation:
v=frequency ×wave length
v signifies the speed
The speed of a wave is the product of its frequency and wavelength. Hence the speed of the wave with a frequency of 20 Hz and 30 cm wavelength is 0.6 m/s.
What frequency?Frequency of a wave is the number of wave cycles produced at unit time. Thus it has the unit of s⁻¹ which is equivalent hertz Hz.
Wavelength of a wave is the distance it travels in a wave cycle or for a transverse wave the distance between two consecutive crests or troughs is called wavelength.
The relation between frequency v, wavelength [tex]\lambda[/tex] and speed of a wave c is written as below:
[tex]c = v \lambda[/tex]
By this expression it is clear that the speed of increases with frequecy and wavelength.
The frequency of the given vibrational source is 20 Hz and the wavelength is 3 cm or 0.03 m. Hence, the speed of the wave is calculates as follows:
c = 20 Hz × 0.3 m
= 0.6 m/s.
Therefore, the speed of the wave is 0.6 m/s.
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Complex matching suggests that individuals who have formed a relationship may differ predominantly in the area of __________.
Answer:
physical attractiveness
Explanation:
A circular loop of flexible iron wire has an initial circumference of 165.0 cm, but its circumference is decreasing at a constant rate of 12.0 cm>s due to a tangential pull on the wire. The loop is in a constant, uniform magnetic field oriented perpendicular to the plane of the loop and with magnitude 0.500 T. (a) Find the emf induced in the
Answer:
emf = - 0.622 V
Explanation:
The electromotive force is given by Faraday's law
emf = [tex]- \frac{d \phi }{dt}[/tex]
Ф = B. A
bold indicates vectors
Ф = B A cos θ
in this case it is indicated that the magnetic field is constant and the angle between the magnetic field and the normal to the area is parallel, so the cos 0 = 1
we substitute
emf = [tex]- B \ \frac{dA}{dt}[/tex]
the area of the circle is
A = pi r²
[tex]\frac{dA}{dt} = \pi 2r \ \frac{dr}{dt}[/tex]
emf = B 2π r [tex]\frac{dr}{dt}[/tex]
speed is defined
v = [tex]\frac{dr}{dt}[/tex]
we substitute
emf = - 2π B r v
let's calculate
emf = - 2π 0.5 1.65 π0.12
emf = - 0.622 V
A Star fleet science officer drops a large rock from a height of 1.55 m onto the surface of an alien planet. The rock strikes the ground in 0.230 s. Determine the acceleration of gravity.
Answer:
58.6 m/s²
Explanation:
Applying,
s = ut+gt²/2............ equation 1
Where s = height of the rock, u = initial velocity, t = time, g = accelration due to gravity of the planet.
From the question,
Given: s = 1.55 m, t = 0.23 s, u = 0 m/s (dropped from an height)
Substitute these values into equation 1
1.55 = (0×0.23)+g(0.23²)/2
1.55 = 0.0529g/2
0.0529g = 3.1
g = 3.1/0.0529
g = 58.6 m/s²
why is it not possible to make use of solar cells to meet all of our energy needs?why
Answer:
In the solar cells, the energy is obtained only during the day, when the Sun shines. .So, it increases the cost of using solar panels as the source of energy. So, the solar cell is not used to meet all our energy needs
hope this helps
have a good day :)
Explanation:
Answer:
In the solar cells, the energy is obtained only during the day, when the Sun shines. ... So, it increases the cost of using solar panels as the source of energy. So, the solar cell is not used to meet all our energy needs
Explanation:
n the solar cells, the solar panel convert solar energy into electricity, which is stored in storage battery. The storage battery give the direct current but all the appliances are working by the alternating current, so first of all direct current is converted into alternating current by any suitable appliances before it can be used to run various devices. So it increases the cost of using solar panels as the source of energy.
After hearing about an accident on his normal route, Mr. Gujral checks for alternate routes to get to work. What type of circuit does this traffic situation model?
Answer:
C
Explanation:
a parallel circuit because there is more than one path
Answer:
C) a parallel circuit because there is more than one path
Explanation:
EDGE 2022
A capacitor has plates of area 5.25 * 10 ^ - 5 * m ^ 2 which are separated by 3.14 * 10 ^ - 6 * m . What is its capacitance?
Answer:
1.47 x 10^-10
Explanation:
Acellus
The capacitance of the given capacitor is approximately 1.4805 × [tex]10^{(-10)[/tex]F.
The capacitance (C) of a capacitor is determined by the formula:
C = (ε₀ ×A) / d
Where:
C is the capacitance
ε₀ is the permittivity of free space (ε₀ ≈ 8.85 × [tex]10^{(-12)[/tex] F/m)
A is the area of the plates
d is the distance between the plates
Given:
Area of the plates (A) = 5.25 × [tex]10^{(-5)[/tex]m²
Distance between the plates (d) = 3.14 × [tex]10^{(-6)[/tex] m
Using the given values, we can calculate the capacitance:
C = (ε₀ ×A) / d
C = (8.85 × [tex]10^{(-12)[/tex] F/m) × (5.25 × [tex]10^{(-5)[/tex] m²) / (3.14 × [tex]10^{(-6)[/tex]m)
Simplifying the expression:
C = (8.85 × 5.25 × [tex]10^{(-12 - 5)[/tex]) / (3.14 × [tex]10^{(-6)[/tex])
C = (46.4625 × [tex]10^{(-17)[/tex]) / (3.14 × [tex]10^{(-6)[/tex])
C = 14.805 × [tex]10^{(-17 - (-6)}[/tex])
C = 14.805 × [tex]10^{(-11)[/tex]
Using scientific notation, capacitance as:
C = 1.4805 × [tex]10^{(-10)[/tex] F
Therefore, the capacitance of the given capacitor is approximately 1.4805 × [tex]10^{(-10)[/tex] F.
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Which statement best explains why there could be a force of attraction
between two electrically charged objects?'
because they have like charges
because they have unlike charges
because they have the same number of protons
because they have the same number of electrons
When Copernicus first systematically created his Sun-centered model of the universe, it did not lead to substantially better predictions of planetary positions than the Ptolemaic model. Why not
Answer:
When Copernicus first systematically created his Sun-centered model of the universe, it did not lead to substantially better predictions of planetary positions than the Ptolemaic model because the Catholic Church, which was the power at the time, stated it was false, and anybody who believed Copernicus and spread the "myth" were excommunicated or even executed. This was because a sun centered universe would mean that everything the Catholic Church had been teaching about how the Earth was the center of the universe would be false. If people believed it, the church would no longer be seen as the infallible authority, so they needed to stop it from spreading.