Answer:
Newton's Third Law of Motion states that for every action, there is an equal and opposite reaction. Thus, swimmers must stroke downward in the water to stay afloat and propel forward. This movement is equal and opposite to the force the water exerts against the swimmer to stop them from moving.
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A 1.11 kg ball sits at rest on a table 1.72 m above the ground. What is the potential energy of the ball?
Answer:
18.71 joules
Explanation:
The formula to solve for potential energy is PE = mgh
where m = mass, g = force of gravity, and h = height.
m = 1.11 kg
g = 9.8 m/s^2
h = 1.72 meters
PE = (1.11)(9.8)(1.72)
PE = 18.71016
Therefore, the potential energy of the ball is 18.71 joules.
Answer:
The formula to solve for potential energy is PE = mgh
where m = mass, g = force of gravity, and h = height.
m = 1.11 kg
g = 9.8 m/s^2
h = 1.72 meters
PE = (1.11)(9.8)(1.72)
PE = 18.71016
Therefore, the potential energy of the ball is 18.71 joules.
Which of the following keeps the planets in their orbits in the solar system?
A. Friction
B. Gravity
C. Magnetism
D. Pressure
B is the correct answer
If the mass of an object is 35grams and it takes 7 cm3 of space ,calculate the density
Calculate the following:
D = 35 m
T = 17 sec
V = ?
¿Por qué crees que es importante desarrollar actividad física habitualmente, así como practicar hábitos de higiene saludable?
La actividad física posee muchos beneficios para la salud. Algunos de estos beneficios son la reducción en el riesgo de padecer enfermedades, control del peso, fortalecimiento de huesos y músculos, etc.
La actividad física regular previene la aparición de enfermedades cardiovasculares al evitar la acumulación de colesterol en las arterias que transportan sangre a diferentes áreas del organismo.
La actividad física consume calorías, especialmente aquellas provenientes de los lípidos (grasas), con lo cual permite controlar el peso y reducir el riesgo de obesidad.
La actividad física también ayuda al fortalecimiento de los tejido oseo, con lo cual previniendo enfermedades relacionadas tales como la osteoporosis.
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PLS HELP, 20 POINTS
Which statement accurately describes the motion of the object in the graph above?
A. It moved from 3 cm to 10 cm at a constant speed of 2 cm/s.
B. It moved from 0 cm to 6 cm at an average speed of 1 cm/s.
C. It moved from 0 cm to 10 cm at an average speed of 2 cm/s.
D. It moved from 3 cm to 6 cm at a constant speed of 3 cm/s.
Answer:
A. It moved from 3 cm to 10 cm at a constant speed of 2 cm/s.
Explanation:
Just took the quiz.
It moved from 3 cm to 6 cm at a constant speed of 3 cm/s. This statement accurately describes the motion of the object in the graph above
What is motion of object ?
An object is said to be in motion , if its position changes with respect to its surroundings and time.
A. Object's motion is from 3 cm to 10 cm at a constant speed of 2 cm/s
let us check
time = 7 sec
distance = 10 - 3 = 7 sec
speed = distance / time = 7/7 = 1 m/s
wrong option
B. Object's motion is from 0 cm to 6 cm at an average speed of 1 cm/s.
distance = 6 cm
time = 7.5 sec
speed = 6/7.5 = 0.8 m/s
wrong option
C. Object's motion is from 0 cm to 10 cm at an average speed of 2 cm/s.
distance = 10 cm
time = 9 sec
speed = 10 / 9 = 1.11 m/s
wrong option
D. Object's motion is from 3 cm to 6 cm at a constant speed of 3 cm/s.
distance = 6-3 = 3 cm
time = 7.5 - 6.5 = 1 sec
speed = 3 /1 = 3 m/s
correct option D. It moved from 3 cm to 6 cm at a constant speed of 3 cm/s.
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What are solar flares, and how do they impact Earth?
Answer:
Explanation:
Flares occur in active regions around sunspots, where intense magnetic fields penetrate the photosphere to link the corona to the solar interior. ... X-rays and UV radiation emitted by solar flares can affect Earth's ionosphere and disrupt long-range radio communications.
has your doctor ever said that you should only do physical activity? yes or no
No,
Doctor not only advice for physical activity but also for social and mental activities
Answer:
No
Explanation:
Your doctor wouldn't said anyone to do only physical activities.Physical activities is not enough.You should be mentally fit as well as physicallyFor mental fitness you should do mental activitiesimagine a shopping cart of mass m, moving at a velocity of v to the right, running into a second shopping cart, of mass 3m, which is at rest.
The impulse is the product of mass and velocity. Hence, the impulse delivered by the second shopping cart is 3mv/2
Given the Parameters :
Mass of cart 1 = m Initial Velocity and direction = v toward the right Final velocity = v/2 towards the left Mass of cart 2 = 3m Velocity = 0 m/s (At rest)Impulse delivered by the second cart on the first :
Impulse = Mass × velocity
Impulse = Mass of cart 2 × final velocity of cart 1
Impulse = 3m × v/2 = 3mv/2 Ns (towards the left)
Therefore ; the impulse delivered by the second shopping cart is 3mv/2 to the left.
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What is the density of the football in g/cm
Answer: see below.
Explanation:
Your question is lacking the necessary parameters, so I will assume the values to enable me to solve it:
Mass of football = 20 grams
Volume of football = 100[tex]cm^{3}[/tex]
To find the density of the football;
Density is simply mass per unit volume of an object such as a football.
Mathematically, the density of an object is given by the formula;
Density=[tex]\frac{Mass}{Volume}[/tex]
Substituting the assumed values into the above formula;
Density=[tex]\frac{20}{100}[/tex]
Density= 0.2g/[tex]cm^{3}[/tex]
Therefore, the density of the football is 0.2g/[tex]cm^{3}[/tex] .
For you: You can substitute the appropriate parameters into the formula to get the exact density of the ball.
how are wavelength, frequency, and energy related for photons of light?
The wavelength and the frequency of the light are inversely proportional to each other, the multiplication of the wavelength and the frequency of the light is equal to the speed of the light.
What is Wavelength?It can be understood in terms of the distance between any two similar successive points across any wave for example wavelength can be calculated by measuring the distance between any two successive crests.
C = λν
As given in the problem we have to find out how are wavelength, frequency, and energy-related to photons of light,
The relationship between the wavelength and the frequency of light is inverse, and the product of the wavelength and the frequency equals the speed of light.
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pls need an answer asap
c] Electrons
Electron gets transferred
the amount of air that can be forcefully exhaled after a normal tidal volume exhalation is called the ________.
Answer:
Expiratory Reserve Volume
Explanation:
Biểu diễn những lực sau đây:
a. Trọng lực của một vật 300N ( tỉ xích 0.5cm ứng với 50N )
b. Lực kéo tác dụng vào điểm A của một vật có độ lớn 1500N theo phương nằm ngang, chiều từ trái sang phải ( 1cm ứng với 500N )
Answer:
Explanation: HIII
when the weight of the object increase block what is the force of friction applied? Explanation?
Answer:
There is absolutely No relationship between the weight of an object (which is constant) and the frictional force. If a block is sliding on a surface, that surface will be exerting a force on the block. That force can be resolved into a component parallel to the surface (which we call the frictional component), and a component perpendicular to the surface (called the normal component). For many situations, we find experimentally that the frictional component is approximately proportional to the normal component. The frictional component divided by the normal component is defined to be a quantity called the coefficient of kinetic or sliding friction. The coefficient of kinetic friction obviously depends on the nature of the surfaces involved. The normal component on an object can be decreased if you pull in the direction of the normal component (the weight does not change). However pulling this way on the object not only decreases the normal component, but it also decreases the frictional component since they are proportional. This is why it is easier to slide something if you pull up on it while you push it. If you push down, the normal and frictional components increase so it is harder to slide the object. The weight of an object is the downward force exerted by Earth’s gravity on that object, and it does not change no matter how you push or pull on the object.
can i get help with this worksheet
Answer:
hi uv f hmm k in vyvj
Explanation:
hujjkiv ghujihtnkbggvhbbbnnjnj
What is the mass of an object if it accelerates at 3 m/s? and has a force of
1 N?
Answer:
1 / 3 or 0.33
that is if you meant that the object accelerates at 3 m / s² not 3 m / s
for the unit of acceleration is m / s²
Explanation:
m = ?
a = 3
f = 1N
where;
m = mass ( kg )
a = acceleration ( m / s² )
f = force ( N )
from all the parameters we are given, we can use Newton's second law of motion to solve it
that is;
a = f / m
to make m the subject of the formula, we have to cross multiply to give us;
m( a ) = f
divide through by a to give us;
m ( a ) / a = f / a
therefore,
m = f / a
so, we substitute our values to give us;
m = 1 / 3
therefore. m = 1 / 3 or 0. 33
hope this helps
thank you!!!!
Fig. 2.1 is a head-on view of an airliner flying at constant speed in a circular horizontal path.
The centre of the circle is to the left of the diagram.
The weight of the airliner is 1.20 x 10^6 N and there is an aerodynamic lift force of
1.39 x 10^6N acting to the left by drawing a scale vector
Ps: ^ to the power of
[tex]1.39[/tex] × [tex]10^{6} N[/tex] acting [tex]30^{o}[/tex] to the left of the vertical.
Constant speed:We refer to an object as traveling at a constant speed when its speed is constant and neither rises nor falls, at a continuous rate.Lift:A force is applied to an object by a fluid flowing around it. The part of this force that is perpendicular to the direction of the incoming flow is called lift. In contrast, the drag force, or portion of the force parallel to the flow direction, is the opposite. Lift typically acts upward to counteract the pull of gravity, but it can also act at an angle to the flow in any direction.The force is referred to as an aerodynamic force if the fluid is air.It is known as a hydrodynamic force in water or any other liquid.Solution -The weight of the airliner is [tex]1.20[/tex] × [tex]10^{6} N[/tex] and there is an aerodynamic lift force of [tex]1.39[/tex] × [tex]10^{6} N[/tex] acting [tex]30^{o}[/tex] to the left of the vertical.
Therefore, the airliner follows this circular path while maintaining a steady speed.
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When a 10V battery is connected to a resistor, 2A of current flows in the resistor.What is the resistors value? Formulas: V=IR, I=V/R, R=V/INote no need to write the unit in your answer.help im dying
Answer:
V = 10
I = 2
R = ?
from,
R = V/I
R = 10/2 = 5 ohms.
P.S; don't die. :))
Students are given the following information about a 2.0 kg, motorized toy boat on water. what net force is exerted on the boat from 4S to 8S?
The motorized toy boat experiences a net force of 0 N between 4 s and 8 s.
The motorized toy boat moves at 8 m/s (u) at 4 s and at 8 m/s (v) at 8 s. We can calculate the acceleration (a) in that period using the following kinematic expression.
[tex]a = \frac{v-u}{\Delta t} = \frac{8m/s-8m/s}{8s-4s} = 0 m/s^{2}[/tex]
The object with a mass (m) of 2.0 kg experiences an acceleration of 0 m/s². We can calculate the net force (F) in that period using Newton's second law of motion.
[tex]F = m \times a = 2.0 kg \times 0 m/s^{2} = 0 N[/tex]
The motorized toy boat experiences a net force of 0 N between 4 s and 8 s.
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the perimeter of a rectangle is 28 inches if the width of the rectangle is 7 inches what is the length
imagine you would interview a news Anchor about how they use graphs in presentation of Science in the news think of at least four questions you would ask then imagine how they would answer your question
Answer:
The conventional wisdom of the digital era is that journalists can now know their audiences in far more intimate detail than at any other time in the history of the profession. Previously, journalists based their audience knowledge primarily on their closest social circles. Now, new tools can help them solicit readers’ feedback, analyze and understand readers’ behavior, and open new channels for conversation. These new capabilities promise to shine a light on the abstract audience — making one’s readers present, quantified and real
A car starts from rest and retains the acceleration of 4m/s² in 20 second . calculate its final velocity.
STEP BY STEP
Given : A car starts from rest and retains the acceleration of 4m/s² in 20 second. Calculate its final velocity.
Solution : As we know that a car starts from rest so it's initial velocity should be 0 m/s. Acceleration is 4 m/s² and time taken is 20 sec. So, we need to calculate it's final velocity which we can get it usi g the first equation of motion.
First Equation of Motion : v = u + at
Putting all the required values in the formula we will get v
v = 0 + 4(20) v = 0 + 80 v = 80Henceforth, final velocity is 80 m/sec.
What is an object's acceleration that takes 550.0 meters to go from 6.0 m/s to
85.0 m/s?
from,
v² = u² + 2as
where s = distance
a = (v² - u²) /2s
a = (85² - 6²) /2*550
a = 6.53m/s²
How much time would it take for the sound of Thunder to travel 2000 meters if sound travels a speed of 330 meters per sec.
Answer:
6.06 seconds i believe (rounded)
i just divided.
1. Which of the following does not play a role in convection in the mantle?
A. gravity
B. temperature
C. density
D. magnetism
Answer:
Magnetism
Explanation:
calculate the density of a 50 ml solution that is 5% water and 95% ethanol. show your calculation.
The density of the solution from the given compositions of water and ethanol is 799.55 kg/m³.
The given parameters;
Volume of the solution, v = 50 mlComposition of water, 5%Composition of ethanol, 95%Density of water, = 1000 kg/m³Density of ethanol, = 789 kg/m³The density of the solution from the given compositions of water and ethanol is obtained by finding the respective amount of water and ethanol composition is the solution.
The density of the solution is calculated as follows;
[tex]\rho = \frac{5(1000 \ kg/m^3) + 95(789 \ kg/m^3)}{100} \\\\\rho = 799.55 \ kg/m^3[/tex]
Thus, the density of the solution from the given compositions of water and ethanol is 799.55 kg/m³.
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The answer is 799.55 kg/m3.
напряженность поля в некоторой точке 0,8 кН/кл определите величину силы,с которой поле будет в этой точке действовать на заряд 2,5мкКл
Answer:
напряженность поля в некоторой точке 0,8 кН/кл определите величину силы,с которой поле будет в этой точке действовать на заряд 2,5мкКл 00
Which statement about the universality of gravity is untrue?
a
The gravitational force between two objects depends only on their masses.
b
The gravitational force between two objects increases if the mass of one object increases.
c
The gravitational force between two objects increases if the distance between the objects decreases.
d
Any two objects that have mass also have a force of gravity acting between them, no
Answer:
Explanation:
See attachment.
a NO - it depends on distance between the masses, also.
The gravitational force between two objects depends only on their masses.
b YES - see attachment
The gravitational force between two objects increases if the mass of one object increases.
c. No - it decrease
The gravitational force between two objects increases if the distance between the objects decreases.
d. It appears the answer is incomplete (stops at . . ., no . . ). Otherwise I say YES.
Any two objects that have mass also have a force of gravity acting between them, no