Answer: B) zero because both objects are at rest
Explanation:
Given the following :
Mass of anchor = 10kg
Mass of boat = 1000kg
Note : both boay and anchor are at rest, this gives a Velocity of zero
The momentum of a body is given as the product of Mass and velocity, that is,
Momentum = mass × velocity
Initial Momentum of anchor-boat system =
(mass of boat× initial velocity of boat) + (mass of anchor × initial velocity of anchor)
Initial Velocities of boat and anchor = 0
Therefore,
Initial momentum = (1000 × 0) + (10 × 0)
Initial momentum = (0 + 0) = 0
This is ecause both objects are at rest.
Which statements describe how a machine can help make work easier? Select two options.
It can put out more force than the input force by decreasing the distance through which force is applied.
It can increase the amount of work performed if the output force is in the same direction as the input force.
It can apply a force to an object in a different direction than the force applied to the machine.
It can increase the distance through which a force acts by exerting less force than was used on it.
It can exert a greater force through a greater distance than the force used on the machine.
Answer:
It can put out more force than the input force by decreasing the distance through which force is applied.It can apply a force to an object in a different direction than the force applied to the machine.Explanation:
Assuming the machine is a simple machine, such as a lever or pulley, the machine will not do any more work than is put into it. However, it can change the magnitude or direction (or both) of the input force required to achieve a particular output force.
Because the machine does not increase the work done, if the output force is greater, the output distance must be less.
The applicable observations are ...
It can put out more force than the input force by decreasing the distance through which force is applied.It can apply a force to an object in a different direction than the force applied to the machine.
To run the physics cart, the fan speed of the cart is manipulated. This is the (blank) variable. The cart accelerates due to the speed of the fan. Acceleration is therefore the (blank) variable. A "constant" is a parameter that stays the same regardless of the variables. One parameter of the cart that is held constant is the (blank) .
Answer:
A) Independent
B) Dependent
C) Mass
Explanation:
The speed applied to the physics cart is manipulated. This doesn't depend on another variable. Thus, speed is the (independent) variable.
The cart accelerates due to the speed applied to the cart. Acceleration depends on the speed applied. Thus, acceleration is therefore the (dependent) variable.
A “constant” is a parameter that remains the same regardless of the variables.
One parameter of the cart that is held constant is the (mass).
the role of hydrochloric acid in the stomach
Answer:
1. For acidifying stomach content. Hydrochloric acid is the main component
2. Prevents Infections. Hydrochloric acid acts as a barrier against foreign microorganisms
3. Helps in digestion of food. The hydrochloric acid present in the gastric acid.
So basically it helps digest food in the stomach.
A block of wood of mass 24 kg floats on water. The volume of the block below the surface of the water and the density of the wood.( Density of water= 1000kgm-3
Answer:
0.024m^3
Explanation:
=======
Answer:
=======
Given:-
Mass of the block of wood = 24 kg
Volume of wood = 0.032 m^3
Density of water = 1000kg/m^3
Now,
Density of wood is given by,
\frac{m}{v} = \frac{24}{0.032} \\
\frac{m}{v} = 750 \: kg/m ^{3}
Therefore,
The density of wood is 750kg/m^3
By principle of floatation,
Mass \:of\: wood = Mass\: of\: liquid \:displaced
Therefore,
Mass of liquid displaced = 24kg
Volume of liquid displaced (v),
\frac{m}{v} = \frac{24}{1000} \\
\frac{m}{v} = 0.24m ^{3}
Now,
Since the volume of the wood is equal to the volume of water displaced, it is 0.024m^3
=====
Note:
=====
=> The volume of the wood below the water surface is the volume of water displaced.
=> Buoyant\: force = Weight\: of\: the \:displaced\: water.
The law of motion that states that an object's acceleration is directly related
to the net force applied and inversely related to the mass of the object is
Answer:
Newtons 2nd law
F = ma
Explanation:
Newton's second law of motion can be formally stated as follows: The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object.
Which is a characteristic of all waves?
All waves carry energy.
All waves move through space.
All waves move through matter, from particle to particle.
All waves transfer energy parallel to the direction of wave mo
Answer:à
Explanation:waves carry energy in the direction in which they move
Characteristics of all waves:
All waves carry energy.
All waves move through space.
All waves move through matter, from particle to particle.
All waves transfer energy parallel to the direction of wave mo tion.
Which object has more gravitational potential energy
Answer:
need more context
Explanation:
Answer:
EL QUE TENGA MÁS MASA Y MÁS ALTURA.
Explanation:
Give two examples of spatial interference which can be easily observed. Small explanation of each object please, just so I can understand.
Answer:
Spatial interference describes the correlation between waves at different points in space.
The two example of spatial interference are as following:
alphanumeric characters can be easily identified in isolation but difficult to be identified when these characters are surrounded by optotypes because visual acuity will be reduced by crowded conditions that limit resolution at several stages of visual processing.Birds are able to identify visual target slowly that are presented at the top than to that same visual target presented at the bottom.Hence, different waves in a space correlate result into Spatial interference.
Pleasssseeee helpppp i will mark brainlest
Answer:
the second and the third
Explanation:
the maximum daylight hours is the second, and the warmest temperatures for the northem hemisphere.
if it takes 20 n to move an object 20m how much work was done
Answer:
[tex]\boxed{Work \: done = 400 \: N-m}[/tex]
Explanation:
Force = 20 N
Displacement =20 m
Work Done = Force × Displacement
= 20 × 20
= 400 N-m
Which situation involves an object that can be considered to be in free fall?
A) a bungee jumper just before reaching the bottom of a jump.
B) a ball at the top of its motion after being thrown straight up in the air.
C) a helicopter that is hovering above a freeway. D) a meteor traveling through the atmosphere
Answer:
B: Only the ball experiences no resistive force to its state of motion.
Match each vocabulary word with appropriate definition. chemical property chemical change reactivity combustibility
Answer:
1.) Chemical Change - a change in matter that results in a change in its identity and properties
2.) Combustibility - the ability of a substance to burn
3.) Reactivity - The ability of a substance to combine Chemically with another
4.) Chemical Property - the ability of matter to change into a different substance
Explanation:
Proof: -Image Below & the definitions for each word-
Chemical Change- Chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. ... An example of a chemical change is the reaction between sodium and water to produce sodium hydroxide and hydrogen.
Combustibility- Combustibility is a measure of how easily a substance bursts into flame, through fire or combustion. This is an important property to consider when a substance is used for construction or is being stored. It is also important in processes that produce combustible substances as a by-product.
Reactivity- In chemistry, reactivity is the impetus for which a chemical substance undergoes a chemical reaction, either by itself or with other materials, with an overall release of energy.
Chemical Property- A chemical property is any of a material's properties that becomes evident during, or after, a chemical reaction; that is, any quality that can be established only by changing a substance's chemical identity. ... They can also be useful to identify an unknown substance or to separate or purify it from other substances.
Have a nice day!
Chemical change - A change in a substance that brings a change in its identity and properties
Combustibility - The ability of a substance to bursts into the combustion
Reactivity - The ability of a matter to chemically combine with others.
Chemical Property - The ability of a substance to change into a completely different substance.
What are chemical properties, chemical change, reactivity, and combustibility?Chemical changes take place when a substance combines with another substance to create a new substance, called chemical synthesis. An example of a chemical change is the formation of sodium hydroxide and hydrogen by the reaction between sodium and water.
Combustibility determines how easily a substance can burst into flame, through combustion. The combustibility is a property to consider when a substance is used for storage or for construction. It is also an important property in processes where the formation of combustible substances is a side product.
In chemistry, reactivity is the property of a chemical substance that undergoes a chemical reaction with itself or with other chemicals, and the overall release of energy.
Chemical properties are the characteristics of a particular substance that can be noticed during a chemical reaction. Some major chemical properties include heat of combustion, flammability, rate of radioactive decay, toxicity, pH value, and chemical stability.
Learn more about chemical change, reactivity, and combustibility, here:
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in which electric circuit would the voltmeter read 10 volts ?
Given that,
Voltage = 10 volt
Suppose, The three resistance is connected in parallel and each resistance is 12 Ω. find the current in the electric circuit.
We need to calculate the equivalent resistance
Using formula of parallel
[tex]\dfrac{1}{R}=\dfrac{1}{R_{1}}+\dfrac{1}{R_{2}}+\dfrac{1}{R_{3}}[/tex]
Put the value into the formula
[tex]\dfrac{1}{R}=\dfrac{1}{12}+\dfrac{1}{12}+\dfrac{1}{12}[/tex]
[tex]\dfrac{1}{R}=\dfrac{1}{4}[/tex]
[tex]R=4\ \Omega[/tex]
We need to calculate the current in the circuit
Using ohm's law
[tex]V=IR[/tex]
[tex]I=\dfrac{V}{R}[/tex]
Where, V = voltage
R = resistance
Put the value into the formula
[tex]I=\dfrac{10}{4}[/tex]
[tex]I=2.5\ A[/tex]
Hence, The current in the circuit is 2.5 A
Evaluate: (5x + 4y)/2, which is an expression of a certain experimental procedure. lf x represents the valence of Argon and y represents the summation or valencies of sulphur and Neon
Answer: 48
Explanation:
Given the expression (5x + 4y)/2
Where x represents the valence of Argon and y represents the summation or valencies of sulphur and Neon
A neutral Argon, Sulphur and Neon will have :
The valence of Argon = 8
The valence of sulphur = 6
The valence of Neon = 8
Therefore, X = 8 and Y = 6 + 8 = 14
Substitute x and y into the expression.
(5x + 4y)/2 = (5×8 + 4×14)/2
(40 + 56)/2 = 96/2 = 48
Evaluating: (5x + 4y)/2 = 48
A family has husband wife and three children A B and C the present age of husband is 5 years more than the vice president age the vice president age is twice the present age of a the present age of a is 12 years more than the present age of B 20 present age is one and a half times the present age of see if she is 12 years old at present what is the present age of husband's friend Ram who is 15 years younger than the husband
Answer:
38 years old.
Explanation:
So, we are given the following data or parameters or information which is going to assist us in solving this particular Question;
1=> The three children are A, B and C respectively.
2=> "the present age of husband is 5 years more than the wife's age."
3=> " the wife's age is twice the present age of A"
4=> the present age of A is 12 years more than the present age of B "
5=> B's present age is one and a half times the present age of C .
6=> "if C is 12 years old at present "
7=> "husband's friend Ram who is 15 years younger than the husband"
We will start from point 5 above that is to say;
B = C × 3/2. = 12 × 3/2 = 6 × 3= 18.
Also, A = 12 + B = 12 + 12= 24.
From the point 3 Above; the wife's age= 2 × A= 2 × 24 = 48 years of age.
From the point 2, we have that the husband's age = 5 + 48 = 53 years of age.
Thus, the present age of husband's friend, Ram who is 15 years younger than the husband = 53 - 15 = 38 years old
An 82 kg jogger has 810 J of kinetic energy. What is the jogger’s velocity? 4.4 m/s 9.9 m/s 19 m/s
Answer:
4.4 m/s
Explanation:
KE = ½ mv²
810 J = ½ (82 kg) v²
v = 4.4 m/s
Answer:
4.4
Explanation:
got right on edg
The image shows a man on a cliff. What type of energy does he possess?
1 point
Answer:
potential energy
Explanation:
An open-pipe resonator has a length of 2.39 m. Calculate the frequency of its third harmonic if the speed of sound is 343 m/s.
80 Hz
115.7 Hz
215.27 Hz
100.1 Hz
Answer:
f = 215.27 Hz
Explanation:
We have,
An open-pipe resonator has a length of 2.39 m.
It is required to find the frequency of its third harmonic if the speed of sound is 343 m/s.
For third harmonic, its length is equal to, [tex]l=\dfrac{3\lambda}{2}[/tex]
So,
[tex]\dfrac{3v}{2f}=2.39[/tex]
f is frequency in its third harmonics
[tex]f=\dfrac{3v}{2\times 2.39}\\\\f=\dfrac{3\times 343}{2\times 2.39}\\\\f=215.27\ Hz[/tex]
So, the frequency of its third harmonic is 215.27 Hz.
23 POINTS! Does the period of a pendulum depend on the mass? Explain
Answer:
The period of a pendulum does not depend on the mass of the ball, but only on the length of the string.
Explanation:
Two pendula with different masses but the same length will have the same period. Two pendula with different lengths will different periods; the pendulum with the longer string will have the longer period.
It is a way to display to number of ________ for elements. This chart will show the correlation between ______ number and the number of valence electrons
Answer:
Electrons
Atomic number
Explanation:
The question describes a period table which is a chart of the elements.
The Periodic Table of elements shows the arrangement of elements based on their increasing atomic number.
In a neutral atom, the number of electrons will equal the number of protons, so we can easily determine electron number from atomic number. In addition, the position of an element in the periodic table—its column, or group, and row, or period—provides useful information about how those electrons are arranged (electronic configuration) in their different shells.
It is a way to display to number of ____electrons____ for elements. This chart will show the correlation between __atomic____ number and the number of valence electrons
Un tubo metálico tiene 100 metros de longitud cuando está a 0 oC y 100,13 metros cuando se calienta hasta 100 oC. ¿Cuál es el coeficiente de dilatación del material?
Answer:
α= 1.3 10-5 ºC⁻¹
Explanation:
La dilatación termica de los cuerpos esta dada por la relación
ΔL = L₀ α ( T -T₀)
en este caso nos piden el coeficiente de dilatación térmica
α =DL/L₀ DT
calculemos
α = ( 100,13 -100)/[100 (100 – 0)]
α = 1,3 10-5 ºC⁻¹
Traduction
The thermal expansion of bodies is given by the relationship
ΔL = L₀ α (T -T₀)
in this case they ask us for the coefficient of thermal expansion
α = ΔL / L₀ ΔT
let's calculate
α = (100,13 -100) / [100 (100 - 0)]
α= 1.3 10-5 ºC⁻¹
Question 1: A man trailing a trolley bag and suddenly, the wheels of the trolley bag get locked. The man realises that he has to put extra effort to drag the bag. The man finds it difficult to drag the bag because
Answer: Because of the friction force acting directly on the bag.
Explanation:
The function of the wheels is diminish the effect of the friction force, when the friction pulls back, it makes the wheel rotate, and this force is not applied directly on the bag.
Now the wheels are not working, so now the friction is acting directly on the bag, this is why the mand finds more difficult to drag the bag.
When a solid compound dissolves in water
Answer:
The solid separates and disperse uniformly throughout the solution.
What will happen if a spoon measuring 5 °C is placed into a glass of water measuring 20 °C?
A. Heat will move from the water to the spoon until the spoon reaches 20 °C.
B. Heat will move from the spoon into the water until both are balanced at 25 °C.
Heat will move from the spoon into the water until the temperatures of both are balanced
at 15 °C.
C.
D.
Heat will move from the water to the spoon until the temperatures of both are balanced
between 5 °C and 20 °C.
Answer:
d
Explanation:
Francium-233 has a half-life of 22 minutes.A Geigor counter gives a reading of 58 counts per minute (cpm) from a sample of francium-233.What will the reading be 22 minutes later?You can ignore background radiation
Answer:
The reading of the Geiger counter, 22 minutes later = 29 counts per minute (cpm)
Explanation:
Half life is defined as the time taken for the amount ( or activity) of a substance to reduce to half its original value.
As stated in the question, the half life of Francium-233 is 22 minutes, [tex]t_{1/2} = 22 minutes[/tex]. This means that it takes 22 minutes for the activity of Francium-233 to reduce to half of its original value.
The original activity of Francium-233 = 58 counts per minute (cpm)
By the end of 22 minutes, the activity measured by the counter would have halved.
Activity of Francium-233 after 22 minutes = 58/2
Activity of Francium-233 after 22 minutes = 29 counts per minute (cpm)
state newtons second law of motion from the equation f: ma
Newton's Second Law of Motion states "The rate of change of momentum of a body is directly proportional to the applied unbalanced force in the direction of force".
what is electrical power ???
Answer:
Electric power is the rate, per unit time, at which electrical energy is transferred by an electric circuit. The SI unit of power is the watt, one joule per second.
Answer:
Explanation shown below.
Explanation:
Is one generated from the movement of free moving electrons.
Electric energy can be harnessed from different sources.
4) Un péndulo tiene un período de oscilación de 4 seg (T) , realizando su
movimiento desde su posición de equilibrio, si la aplitud del movimiento es de
10 cm y el ángulo de desfase es de 20 grados. Calcular:
La posición en la que se encuentra a los 5 segundos de haber iniciado el
movimiento.
Answer:
x = 1.43 cm
Explanation:
The horizontal displacement of the pendulum can be found using the following equation:
[tex] x(t) = x_{0}*sin(\omega*t + \phi) [/tex]
Where:
x₀: is the initial horizontal displacement = 10 cm
ω: is the angular frequency
t: is the time = 5 s
Φ: is the phase shift = 20° = 20*2π/360 = 0.35 rad
The angular frequency can be calculated using the oscillation perid (T):
[tex] \omega = \frac{2\pi}{T} = \frac{2\pi}{4 s} = 1.57 rad/s [/tex]
The horizontal displacement is:
[tex] x(t) = x_{0}*sin(\omega*t + \phi) = 10 cm*sin(1.57 rad/s*5 s + 0.35 rad) = 1.43 cm [/tex]
Therefore, the displacement of the pendulum at 5 s is 1.43 cm.
I hope it helps you!
2 Points
Mechanical energy is the ___
of kinetic energy and potential energy.
Hey!!!
Mechanical energy is the sum of kinetic energy and potential energy.
Hope it helps..
Good luck on your assignment
A 2.0 g ball with a +0.05 C charge is moved from the negative plate to the positive plate, and then is released. The potential difference between the plates is 12.0V. When the ball strikes the (–) plate its velocity is most nearly equal to
Answer:
24.5 m/s
Explanation:
Since the work done by the electric field on the charge equals the kinetic energy of the ball, then
qV = 1/2mv²
and v = √(2qV/m)
where q = charge = + 0.05 C, V = potential difference = 12.0 V, m = mass of ball = 2.0 g = 0.002 kg
Substituting the values into v, we have
v = √(2 × + 0.05 C × 12.0 V/0.002 kg)
= √(1.2 CV/.002 kg)
= √(600 CV/kg)
= 24.5 m/s