Answer:
19.1 secs
Explanation:
The first step is to calculate the velocity
= 17.4/47.6
= 0.37 m/s
Therefore the time taken for the person to reach the top can be calculated as follows
= 17.4/(0.37+0.541)
= 17.4 / 0.911
= 19.1 secs
Hence the time taken is 19.1 secs
fluid flow: a pump uses a piston of 15 cm diameter that moves at 2.0 cm/s as it pushes a fluid through a pipe. what is the speed of the fluid when it enters a portion of the pipe that is 3.0 mm in diameter? treat the fluid as ideal and incompressible.
As per the question, a pump uses a piston of 15 cm diameter that moves at 2.0 cm/s as it pushes fluid through a pipe. The speed of the fluid when it enters a portion of the pipe that is 3.0 mm in diameter is 5000cm/sec.
The volumetric flow rate refers back to the three-dimensional area occupied by using fluid flowing thru a move section according to time. it's far the ratio of the change within the volume of a flowing fluid to the alternate in time.
According to the question, the volumetric flow rate in the pump and the pipe is the same.
Q = AV
Q = Volumetric flow rate
A = Cross-sectional area
V = Velocity
Q ( pump ) = ( π * 15^2 ) / 4 * 2 = 353.43 cm^3/sec
Q ( pipe ) = ( π * ( 3/10 )^2 ) / 4 * V = 0.071V
Q ( pump ) = Q ( pipe )
Therefore 0.071V = 353.43
Velocity (V) = 5000 cm/sec
Therefore the speed of the fluid when it enters the pipe is 5000 cm/sec.
Velocity is the directional pace of an object in movement as a demonstration of its rate of change in function as determined from a specific body of reference and as measured by way of a selected standard of time.
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Part A
If you are not wearing a seat belt in a car that rounds a curve, and you slide across your seat and slam against a car door, what kind of force is responsible for your slide
centripetal, centrifugal, or no force?
O It is centrifugal force as viewed by someone outside the car.
There is no force as viewed by someone outside the car. To them you move in a straight line
O Centripetal force
It is centripetal force, but only as viewed by someone inside the car.
Answer:
I think it is the last option
Explanation:
A player hits a ball with a bat. The action is the force of the bat against the ball.
What is the reaction to this force?
Answer:
Force of the ball against the bat
Explanation:
Newton's third law of motion states that for every action, there is an equal and opposite reaction. When a player hits a ball with a bat, the force the player exerted on the ball through the bat gave the ball a push force in the forward direction. This is an action force. Now that an action has been initiated, there must be a reaction according to Newton's third law of motion. The magnitude of the force on the ball equals the magnitude of the force on the bat. The direction of the force on the ball is opposite to the direction of the force on the ball. The ball will give the bat an equal and opposite force trying to push the bat backward by resisting the impact of the bat. This is the reaction. The ball will only move if the applied force is able to overcome the resisting force by the bat.
Where;
is the action force of the bat against the ball.
is the equal and opposite reaction force of the ball towards the ball.
If the total charge inside a closed surface is known but. the distribution of the charge is unspecified, can you use Gauss's law to find the electric field? Explain.
No, Gauss’s law of charge distribution in electric field only applies to specified charge distribution. Hence, it cannot be used to find the electric field if the total charge inside a closed surface is known but. the distribution of the charge is unspecified
The electric flux is defined as the electric field multiplied by the area of the surface in a plane perpendicular to the field. Another interpretation of Gauss' rule holds that the net flow of an electric field across a particular surface divided by the contained charge should equal a constant. Gauss' law is only applicable to continuous charge distribution. In such instance, we may calculate the total electric field across the surface. However, we cannot use Gauss' law to calculate the electric field of charge with an uncertain distribution.
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URGENT‼
An amateur marksman aims directly at a bulls-eye (on the same level) 75.0 m away. If the bullet leaves the gun at a speed of 180 m/s, by how much will it miss the target?
Hello!
He will miss it by ≈ 0.852 m
Begin by finding the amount of time necessary to hit the target. Use the formula t = d / s:
t = 75 / 180 = 0.4167 sec
Use the equation d = vi + 1/2at² to solve for the amount the bullet will miss the target. (vi is 0 in this instance). We are solving for the vertical component, so use a = 9.81 m/s (gravity).
d = 0 + 1/2(9.81)(0.4167²)
d ≈ 0.852 m
When two mechanical waves interact and their crests line up, they create constructive interference. True or False?
Two parallel wires separated by 4.00cm repel each other with a force per unit length of 2.00×10⁻⁴ N/m . The current in one wire is 5.00 A. (c) What would happen if the direction of one current were reversed and doubled?
When the direction of one current is reversed and doubled, the force will be doubled.
The force between two parallel currents I₁ and I₂ that are spaced apart by r is measured as the ratio F/L. If the currents are flowing in the same direction, the force is attracting; if not, it is repulsive.
With a distance of 4.00 cm between them, two parallel wires repel one another with a force of 2.00 × 10⁻⁴ N/m. One wire is carrying 5.00 A of current.
I₁ = 5 A
d = 4 cm
F = 2 × 10⁻⁴ N/m
We have, [tex]\frac{F}{L}=\frac{\mu_{0} I_{1}I_{2}}{L}[/tex]
Now, we know the force is directly proportional to the product of the current, and the direction of one current is reversed and doubled.
The force of interaction would become attractive and its magnitude would double as a result of switching the directions of either of the currents and doubling their size.
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What two kinds of energy are part of thermal energy?
Answer:
Many forms of energy exist, but they all fall into two basic categories:
Potential energy.Kinetic energy.Explanation:
Thermal energy is due to the movement, and the kinetic energy associated with this movement, of molecules that make up an object or substance.
Hoped I helped U!! ❤️
Answer:
1.) mechanical energy and 2.) potential energy
Explanation:
Sound is made up of vibrations thermal energy consists of moving molecules in air or in an object, and mechanical energy is the combination of kinetic and potential energy of a moving object.
I hope this helps!!!!
A representation of a chemical reaction that uses symbols to show the relationship between the reactants and the products is called a __________. a. symbolic statement b. chemical equation c. mole ratio d. chemical proportion
Answer:
B. chemical equation.
Explanation:
This explained to be a short method of representing different symbols and structures that are seen to make up a chemical reaction. It is known to have been formulated by a French chemist Jean Beguin. In a course of writing a chemical reaction, its reaction is seen to show a starting compound which is been written on the left hand side of the said equation while the product is written by the right hand side and are separated in different directions by an arrow. When this is done, charges on this equation that is balanced is also written on each side of the equation.
What change would occur if Earth's rate of rotation significantly increased?
a. The day would be longer.
b. The day would be shorter.
c. The year would be longer.
d. The year would be shorter.
Answer:the answer is B The day would be Shorter .
Explanation:its correct I got it right hope this help .
The change that would occur if Earth's rate of rotation significantly increased is that the day would be shorter. The correct option is b.
What is Earth's rotation?The rotation or spin of the Earth is the rotation of the planet Earth around its own axis, as well as changes in the orientation of the rotation axis in space. Earth rotates counterclockwise as seen from the northern polar star Polaris.
Earth rotates because the sun attracts the earth and thus pulls it towards it, and because the earth's revolution around the sun causes it to move away from the sun in the direction of the tangent, causing a rotational force (torque) to act on the earth, causing it to rotate.
The Earth rotates once every 24 hours in relation to the Sun, but once every 23 hours, 56 minutes, and 4 seconds in relation to other distant stars. Because the Earth's rotation slows slightly over time, a day used to be shorter.
Thus, the correct option is b.
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ANSWER THIS FOR BRAINY CROWN B) ITS SO EASY!
Answer:
300
Explanation:
A duck flies 60 m in 6 seconds what is the ducks speed? Show your work plz
Answer:
Wouldn’t his or hers speed be 10m?
Explanation:
because 60 divided by 6 = 10
so 10m per second?
Pls do these for me asap
Answer:
Look below!
Explanation:
1) Observation
2) Hypothesis
3) Results
4) Experiment
5) Problem
6) Conclusion
7) Inference
A flywheel has a radius of 20. 0cm.What is the speed of a point on the edge of
the flywheel if it experiences a centripetal acceleration of 900.0cm/s 2 ?
Given that,
The radius of a flywheel, r = 20 cm = 0.2 m
The centripetal acceleration experienced on the edge of the flywheel = 900 cm/s² = 9 m/s²
To find,
The speed of a point on the edge.
Solution,
The formula for the centripetal acceleration is given by :
[tex]a=\dfrac{v^2}{r}\\\\v=\sqrt{ar} \\\\v=\sqrt{9\times 0.2} \\\\=1.34\ m/s[/tex]
Hence, the required speed is 1.34 m/s
The speed of a point on the edge of the flywheel is 134.16cm/s
The formula for calculating the centripetal acceleration of the flywheel is expressed as:
[tex]a=\frac{v^2}{r}[/tex]
where;
v is the speed of the flywheel
r is the radius of the wheel
Given the following parameters
r = 20.0cm
a = 900cm/s²
Substituting the given parameters into the formula above;
[tex]900=\frac{v^2}{20}\\v^2=900\times 20\\v^2=18,000\\v=\sqrt{18,000}\\v= 134.16cm/s[/tex]
Hence the speed of a point on the edge of the flywheel is 134.16cm/s
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HELPPP!!! During a soccer game, a player kicks the winning goal. When is work being done by the player?
A) when the ball flies through the air
B) when the player moves toward the ball
C) when the player’s foot is in contact with the ball
D) when the player’s foot continues to move after touching the ball
Answer:
when the player’s foot is in contact with the ball
Explanation:
Calculate the centripetal force of a ball on a string in circular motion if the mass is 7 kg
traveling at 3 m/s and the radius of the string is 4 meters.
0 11 N
0 14 N
0 16 N
0 25 N
Answer:
F = 16 N
Explanation:
Given that,
Mass of the ball, m = 7 kg
Speed of the ball in circular motion, v = 3 m/s
The radius of the string, r = 4 m
We need to find the centripetal force of a ball on a string in circular motion. The formula for the centripetal force is given by :
[tex]F=\dfrac{mv^2}{r}[/tex]
Putting all the values in the above formula
[tex]F=\dfrac{7\times (3)^2}{4}\\\\=15.75\ N[/tex]
or
F = 16 N
Hence, the correct option is (c).
The information gathered in an investigation is called _________.
Answer:
Evidence
Explanation:
Explain how a musical instrument such as a piano may be tuned by using the phenomenon of beats.
Hence , musical instrument such as a piano may be tuned by using the phenomenon of beats.
Suppose 2 sound waves of various frequencies reach your ear. the 2 waves can interfere with one another leading to constructive and damaging interference. This may lead to the sound being instead soft and loud, that we have a tendency to decision beats. The beat frequency is that the distinction between the frequency of the 2 sound waves.A musician typically uses the development of beat frequency to tune their piano. They pluck one string of the piano and faucet a implement at the same time. If the 2 sound sources turn out completely different beats, their frequencies will not be identical, and that they are aforementioned to be out of tune. The musician can modify the string's tension and repeatedly repeat the above mentioned method till the beats cannot be distinguished, that means the frequencies are identical. they're aforementioned to be in tune.
This methodology can work a lot of expeditiously for associate degree instrument entirely out of tune as a result of it'll be easier to differentiate the beats of the instruments and also the implement.
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What part of an experiment contains the data tables and graphs
?
Answer: Review your data. ...
Calculate an average for the different trials of your experiment, if appropriate.
Make sure to clearly label all tables and graphs. ...
Place your independent variable on the x-axis of your graph and the dependent variable on the y-axis.
Hope this helps!!
What is the name of the process that plants use to remove carbon dioxide from the atmosphere?
transpiration
photosynthesis
respiration
decomposition
Answer:
Photosynthesis
Explanation:
It removes carbon naturally.
Answer:
photosynthesis
Explanation:
The insulating material placed between the conducting plates of a capacitor is a(n) ?
Answer:
the answer is dielectric
hope helps you
Explanation:
Answer:
dielectric
Explanation:
edge
Using 6. 0×1024 kg for the mass of the earth, what is the acceleration of the earth toward her as she accelerates toward the earth with an acceleration of 9. 8 m/s2 ? assume that the net force on the earth is the force of gravity she exerts on it.
The value of the acceleration of the earth toward it when it accelerates toward the earth with 9.8m/s² is a = 7.35×10-²³m/s².
What are forces?Forces are the definition of Newton's second law, which is stated under the relation:
∑ Force = mass × acceleration.
In other words, force is the origin of motion since it generates acceleration in a system.
In this case we must complete the statement:
"A student with mass 45 kg jumps off a high diving board. Using 6. 0×1024 kg for the mass of the earth, what is the acceleration of the earth toward her as she accelerates toward the earth with an acceleration of 9. 8 m/s2 ? assume that the net force on the earth is the force of gravity she exerts on it."
We determine the Force of the student:
F = ma
F = 45kg * 9.8m/s².
F = 441N
Now we go to the acceleration of the earth:
a = F/m
a = 441N / 6×10²⁴ Kg
a = 7.35×10-²³m/s².
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please help me on this!
A rock has been sent on a journey down through the layers of the Earth until it reaches the inner core. Explain what happens to the atoms in the rock as it moves through each layer.
Answer:
erosion
Explanation:
grows into the eirth each year. the atmosphere and how the worldchanges every year
Two short people are trying to get a 50 kg box moving across the floor. One is quite tall, and the other is quite short, so they can't use the same rope. The shorter person pulls on the rope so it is exactly horizontal to the floor, and uses a force of 170N. The taller person has to hold their rope at a 45 degree angle to the horizontal, and pulls with a force of 200N. What is the acceleration assuming the coefficient of friction is 0.3.
draw the schematic of a circuit where there are now two capacitors in parallel with each other, and in series with the battery, switch, and resistor.
This is the schematic of a circuit where there are two capacitors in parallel with each other, and in series with the battery, switch, and resistor.
What is resistor?A resistor is a two-terminal electrical component that produces electrical resistance in circuits. In electrical circuits, resistors can limit current flow, regulate signal levels, divide voltages, bias active components, and terminate transmission lines, among other functions. High-power resistors can be used as test loads for motor controllers, power distribution systems, and generators because they can produce many watts of heat instead of electrical energy. Only sporadically can variations in operating voltage, period of operation, or temperature affect the resistance of fixed resistors. Variable resistors can be used as humidity sensors, chemical activity sensors, force sensors, heat sensors, light sensors, volume controls, lamp dimmers, and light sensors. Resistors are frequently used in both electrical networks and technological gadgets.
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why does a star go through a cycle?
Answer:
the sun
Explanation:
that is how the solar system works
picture is attached with question
59.00 m is the calculated distance.
Distance is the sum of an object's movements, regardless of direction. Distance can be defined as the amount of space an object has covered, regardless of its starting or ending position. The International System of Units defines a meter as the distance unit. It's interesting to note that many other derived units or quantities, such as volume, area, acceleration, and speed, may be constructed using this as the basic unit and a few formulae.
V = V₀ + at = 4.30 + 3.00*5.00 = 19.30 m/s
d = V₀t + (1/2) at²
= 4.30*5.00 + (1/5.00) ² = 59.00 m
or
d = (1/2) (V₀+V) t
= (1/2) (4.30+19.30) (5.00)
= 59.00 m
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A girl throws a ball vertically upwards. It takes a time of 3.20 s to return to her hand.
Assume air resistance is negligible.
What is the initial speed with which the ball is thrown?
Answer: 15.68ms
Explanation:
From the question, we are informed that it takes a time of 3.20s for the ball to return to her hand.
Then, the time thst will be taken by the ball to reach maximum height will be 1.6s
Let the initial speed be represented by v.
Therefore,
Vf = v - gt
where,
g = 9.8
t = 1.6
Vf = v - gt
0 = v - (9.8 × 1.6)
0 = v - 15.68
v = 15.68ms
=v−gt
⟹0=v−9.8×1.6
⟹v=15.68ms
Question 17 (2 points)
A delivery man is told to go 60 miles per hour north to make his delivery on time. These instructions describe the delivery man's (2 points)
a
speed
velocity
ОБ
OC
Od magnitude
acceleration
The correct answer is velocity.
The vector measure of level and direction of motion is known as velocity. The speed at which an object goes in one direction is known as its velocity. Speed may be used to calculate both the speed of the car traveling north on the major highway and the speed of the rocket bursting in space. As you may expect, the vector velocity's scalar size (total value) corresponds to the movement's speed. Speed is the initial exit of a place in terms of time when it comes to computations. A straightforward formula that incorporates measurement, distance, and time can be used to determine speed.
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A runner exerts a force of 234 Newtons against the ground while using 1100 Watts of power. How long does it take them to run a distance of 30.0 m?
Answer:
30 seconds
Explanation: