Answer:
0.25A
Explanation:
Given parameters:
Quantity of charge = 30C
Time taken = 2minutes = 2 x 60 = 120seconds
Unknown:
Current through the circuit = ?
Solution:
To find the current through the circuit, use the expression below;
I = [tex]\frac{Q}{t}[/tex]
Q is the quantity of charge
t is the time taken
Now, insert the parameters and solve;
I = [tex]\frac{30}{120}[/tex] = 0.25A
A dolphin propels itself through the water, increasing its speed from 5.0 m/s to 8.7 m/s in only 0.70 s. What is the magnitude of the dolphin's average acceleration during this time?
Answer:
5.29 m/s²
Explanation:
From the question given above, the following data were obtained:
Initial velocity (u) = 5.0 m/s
Final velocity (v) = 8.7 m/s
Time (t) = 0.70 s
Acceleration (a) =?
Acceleration is simply defined as the rate of change of velocity with time. Mathematically, it is expressed as:
a = (v – u) /t
Where:
a is the acceleration.
v is the final velocity.
u is the initial velocity.
t is the time.
Thus, with the above formula, we can obtain the acceleration of the dolphin as illustrated below:
Initial velocity (u) = 5.0 m/s
Final velocity (v) = 8.7 m/s
Time (t) = 0.70 s
Acceleration (a) =?
a = (v – u) /t
a = (8.7 – 5)/0.7
a = 3.7 / 0.7
a = 5.29 m/s²
Therefore, the dolphin's acceleration is 5.29 m/s².
Children are ready for more complex storybooks:
Around one.
Around two.
Around two and a half to three years old.
Around three.
Around four years old.
Answer:
4
Explanation:
Because that is when they're mind learns how to read
an object in motion will have a speed which is a scaler , or ( blank ) which is a vector .
Answer:
Velocity
Explanation:
Objects in motion usually have a speed which is scalar or velocity which is a vector.
A scalar quantity is one with magnitude but has no directional attribute.
A vector quantity is one with both magnitude and directional attribute.
Speed is a scalar quantity that describes the magnitude of motion a body accrues.
Velocity is a vector quantity that describes both the magnitude of motion and the direction of motion in a body.
If the escalator pulls you up a slope of 30.0o and moves with a velocity of 3.10m/s. What is the vertical component of your velocity? What is the horizontal component of your velocity?
Answer:
[tex]1.55\ \text{m/s}[/tex]
[tex]2.68\ \text{m/s}[/tex]
Explanation:
v = Velocity of the elevator = 3.1 m/s
[tex]\theta[/tex] = Angle of the slope = [tex]30^{\circ}[/tex]
Vertical component is given by
[tex]v_y=v\sin\theta\\\Rightarrow v_y=3.1\sin30^{\circ}\\\Rightarrow v_y=1.55\ \text{m/s}[/tex]
The vertical component of the velocity is [tex]1.55\ \text{m/s}[/tex].
Horizontal component is given by
[tex]v_x=v\cos\theta\\\Rightarrow v_x=3.1\times \cos30^{\circ}\\\Rightarrow v_x=2.68\ \text{m/s}[/tex]
The horizontal component of the velocity is [tex]2.68\ \text{m/s}[/tex].
Which of the following elements is in Group 2?
Question 8 options:
Oxygen
Hydrogen
Calcium
Answer:
calcium
Explanation:
if you have a periodic table that would be very helpful to you
The two breakers below contain pure water. Which of the following properties is the same for both of these samples?
A) mass
B) volume
C) weight
D) boiling point
The two breakers below contain pure water. Boiling point is the same for both of these samples.
What are intrinsic and extrinsic properties?Extrinsic and intrinsic characteristics are two divisions of matter or things in science and engineering. An extrinsic property is one that is not indigenous to the sample, whereas an intrinsic property is.
No matter the circumstances of measurement, an intrinsic property is constant. The structure and chemical makeup of it determine its value. Depending on the circumstances, an extrinsic property's value may fluctuate. It depends on how the sample is impacted by outside variables.
Boiling point is the same for both of these samples as it doesn't depends on mass of the water.
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Help me please if you don’t mind. The question is:
Blaine hit the ball with 50 newtons of force. It accelerated of his bat at 50 meters per second squared. What is the mass of the ball? *
50 points
Which is a factor that influences the development of cardiovascular disease?
Answer: Several health conditions, your lifestyle, and your age and family history can increase your risk for heart disease. These are called risk factors. About half of all Americans (47%) have at least 1 of 3 key risk factors for heart disease: high blood pressure, high cholesterol, and smoking
Explanation: Have a great day!
Answer:
d
Explanation:
big brain
Select the correct answer. What does solubility mean? A. process of dissolving a solute into a solvent B. process of dissolving a solvent into a solute C. process of determining the amount of solute a solvent will hold D. process of determining the ratio of solute to solvent
Answer:
Solubility, degree to which a substance dissolves in a solvent to make a solution (usually expressed as grams of solute per litre of solvent). Solubility of one fluid (liquid or gas) in another may be complete (totally miscible; e.g., methanol and water) or partial (oil and water dissolve only slightly).
Explanation:
Solubility is a property referring to the ability for a given substance, the solute, to dissolve in a solvent. It is measured in terms of the maximum amount of solute dissolved in a solvent at equilibrium. The resulting solution is called a saturated solution. Solubility is a property referring to the ability for a given substance, the solute, to dissolve in a solvent. It is measured in terms of the maximum amount of solute dissolved in a solvent at equilibrium. The resulting solution is called a saturated solution. The solubility product constant, Ksp, is the equilibrium constant for a solid substance dissolving in an aqueous solution. It represents the level at which a solute dissolves in solution. The more soluble a substance is, the higher the Ksp value it has. The solubility product constant (Ksq) describes the equilibrium between a solid and its constituent ions in a solution. The value of the constant identifies the degree to which the compound can dissociate in water. For example, the higher the Ksq, the more soluble the compound is.
Describe how an electromagnetic wave carries energy from place to place. Your description should include the terms electric field, magnetic field, and perpendicular.
I need a full paragraph not just a sentence...
Answer:
Electromagnetic waves can bring energy into a framework by the power of their electric and magnetic fields. Electric fields contribute to the movement of electromagnetic energy when they exert forces and move charges. Magnetic fields partake in the movement of energy in electromagnetic waves through doing the same. The electric and magnetic fields that make up an electromagnetic wave are perpendicular to each other. Both fields are also perpendicular to the direction that the wave travels. This explains why electromagnetic waves are transversal waves.
1 kg sample of aluminium is stored in a laboratory. In a different laboratory, in the same town,
there is a 1 kg sample of iron.
Which quantity must these two samples always have in common?
Same density
Same temperature
Same volume
Same weight
Plz explain
Answer:
same weight
Explanation:
because same
If the half-life of a 2.0 gram sample of a radionuclide is 15 hours, then the half-life of a 1.0 gram sample of the same radionuclide would be
7.5 hours or 450 minutes. 15/2=7.5
For the 1.0 gram sample of the same radionuclide, the required half life will be of 7.5 hours.
Given data:
The amount of sample at initial is, a = 2.0 g.
The half-life for 2.0 g sample is, [tex]t_{1/2}=15 \;\rm hr[/tex].
In the given problem, it is a simple calculation but the concept of half life is used . The half life is defined as the a time interval required for one-half of nucleus of sample to undergo complete decay.
In the given problem,
2.0 g of sample = 15 hours
1.0 g of sample = 15/2 hours
= 7.5 hours
Thus, we can conclude that for the 1.0 gram sample of the same radionuclide, the required half life will be of 7.5 hours.
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which 3 latitudes receive the sun at their zenith?
Guys if you see this please help me
Vocabulary should be taught:
Through planned lessons.
At home.
Through natural conversations and interactions.
Through both conversations and lessons.
To English language learners.
Answer:
The third one
Explanation:
it is better for vocab to be taught through natural learning and lessons, instead of one or the other.
a particular compound has the empirical formula CH2O. its molar mass is 240.0 g/mol. predict the moleur formula fr this compound
Answer: I believe the formula is 8(CH2O)= C8H16O8.
Explanation:
What's relationship between particle motion and density
Answer:
As temperature increases, a substance will change from solid, to liquid, to gas. The particle theory states that the particles of a substance spread out as they gain energy when heated. Thus, the particles take up more space, which means that the density of the substance decreases.
Explanation:
Only negative charges move
True
False
An object is accelerating at -6.2 m/s? It comes to a stop after 2.0 seconds. What was its initial velocity?
A. -2.7 m/s
B. 2.7 m/s
C. 12.4 m/s
D. -12.4 m/s
NEED ASAP.
WILL GIVE BRAINLIEST.
Answer:
C. 12.4 m/s
Explanation:
Acceleration (a) = -6.2 m/s²
Final velocity (v) = 0 m/s (Comes to rest)
Time taken (t) = 2.0 s
By using equation of motion, we get:
[tex] \bf \longrightarrow v = u + at \\ \\ \rm \longrightarrow 0 = u + ( - 6.2)(2.0) \\ \\ \rm \longrightarrow 0 = u - 12.4 \\ \\ \rm \longrightarrow u - 12.4 = 0 \\ \\ \rm \longrightarrow u + 12.4 - 12.4 = 0 + 12.4 \\ \\ \rm \longrightarrow u = 12.4 \: m {s}^{ - 1} [/tex]
[tex] \therefore [/tex] Initial velocity (u) = 12.4 m/s
The picture below shows a person swinging a toy plane attached to a string in
uniform circular motion,
Which vector points in the direction of the centripetal acceleration of the
plane?
Answer:The answer is option C, the point A
Explanation:Just did it
c. A is the correct answer.
What is centripetal acceleration?It is the acceleration of a body traversing a circular path. Because velocity is a vector quantity (that is, it has both a magnitude, the speed, and a direction), when a body travels on a circular path, its direction constantly changes and thus its velocity changes, producing an acceleration.
According to the question.
In the picture , a person swinging a toy plane attached to a string in uniform circular motion.
The direction of velocity is perpendicular to the direction of the position and tangent to the circular orbit.
When an object moves in a circular orbit, the direction of the velocity changes and the speed may change as well.
Direction of velocity is constantly changing.
The tangent at any point gives the direction of velocity at that point, where as acceleration is always directed towards the recent in a uniform circular motion.
Therefore, vector A points in the direction of the centripetal acceleration of the plane.
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Which of these can be used to induce a current in a closed circuit without the
use of a battery or an electrical power supply?
A) a gravitational field
B) a high temp field
C) a nuclear field
D) a magnetic field
In the figure, block A has a mass of 3.00 kg. It rests on a smooth horizontal table and is connected by a very light horizontal string over an ideal pulley to block B, which has a mass of 2.00
kn When block Bis gently released from rest how long does it take block B to travel 80.0 cm?
Answer:
your photo is not clear
The time taken by the block B to travel 80.0 cm is 0.639 sec. the block is attached on the horizontal table.
What is mass?Mass is defined as the amount of matter a body contains. Inertia, or the body's resistance to acceleration when a net force is applied, is also measured by this term.
It can also be defined as a measurement of the fundamental attribute of all stuff, inertia.
∑Fx = Ft = MaQa
∑Fy = Ft - MbG = MbQb
Ft = 2 x 9.81 + MbQb
3 Qa = 2Qb + 19.62
Since Qb = Qa
5 Qa = 19.62
Qa = 3.924 m/s²
From
d = di + Vit + 1/2 Qt²
0.8 = 0 + 1/2 x 3.924 x t²
t = 0.6395 sec
Thus, the time taken by the block B to travel 80.0 cm is 0.639 sec. the block is attached on the horizontal table.
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SUPER EASY WILL GIVE BRAINLIEST!!
How can a cool red giant be more luminous than a warmer main-sequence star?
a.) The red giant will be more luminous if it is smaller than the main sequence star.
b.) The red giant will be more luminous if it is bigger than the main sequence star.
c.) Cool red giants are always more luminous than a warmer main-sequence star because they give off more energy.
c.) It is not possible for a cool red giant to be more luminous than a warmer main-sequence star.
Answer:
B
Explanation:
The Sun's increased luminosity will heat the Earth's surface so much that the water oceans and atmosphere will evaporate away. Massive main sequence stars will expand much further to become supergiants.
HOPE I HELPED.
maybe i can get brainlist if did.:)
How is the egg transferred from the ovary to the uterus? through muscle contractions by using special hairs by producing estrogen through secretions of glands
Muscle contractions transport the egg from the ovary to the uterus. This is referred to as ovulation. The mature egg is released from the ovary and travels through the fallopian tube to the uterus during ovulation.
Muscular contractions in the tube walls aid in the passage of the egg through the fallopian tube. These contractions produce a wave-like motion known as peristalsis, which aids in the movement of the egg.
Cilia, which are special hairs found on the inner lining of the fallopian tubes, also aid in egg migration. The cilia pulse in unison, creating a current that helps guide the egg to the uterus.
Thus, the process occurs through muscle contraction.
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A 1650kg car accelerates at a rate of 4.0 m/s2. How much force is the car’s engine producing?
A 68 kg runner exerts a force of 59N. What is the acceleration of the runner?
Explanation:
Newton's First Law ,
F = ma
a = m/F
a = 68 / 59
a = 1.15 m/s2
GIVING BRAINLIEST TO THE RIGHT ANSWER examine the information for the two samples described in the chart. How are zinc and sodium alike?
A. They have the same hardness at room temperature.
B. They are both dolids at room temperature.
C. They have the same color.
D. They have the same boiling point.
A train travels the distance from Blaenau Ffestiniog to Wrexham in Wales in 2 hours and 15 minutes. If these two places are 135 km apart, what is the average speed of the train in kilometres per hour?
Answer:
60 km/h
Explanation:
to calculate speed: distance ÷ time
so, 135 ÷ 2.25 = 60km/h
note: 2.25 is 2 1/4 which is the 2 hours and 15 minutes
In a tug of war, when one team is pulling with a force of 85 N and the other 40 N, what is the net
force?
A book is at rest on a table. Identify the correct free-body diagram for this situation.
Answer:
the 3rd pic is correct
Explanation:
because the arrows are going away from each other.
