any object with mass exerts gravity
What are the similarities and differences between hydraulic and pneumatic systems?
Answer:
Pneumatics use easily compressible gas like air or pure gas. Meanwhile, hydraulics utilize relatively-incompressible liquid media like mineral oil, ethylene glycol, water, synthetic types, or high-temperature fire-resistant fluids to make power transmission possible.
Explanation:
hope this helps
Help please (20 pts) I think it's C
What does "think of concrete examples" mean?
A. It means you come up with as many examples as you can in five minutes.
B. It means your thinking is getting too stiff, like concrete.
C. It means you think about how you can imagine the problem as a concrete block.
D. It means think of a real-life example you can relate to that has to do with what you’re learning.
Answer:
I'm not sure it is c I'm sure it is d
As you move from left to right across the electromagnetic spectrum in the image, the wavelength becomes?
A.) Longer
B.) Lower
C.) Shorter
D.) Taller
Answer:
It is A.) Longer
Explanation:
The shortest wavelength is on the (high energy)left side of the diagram with gamma rays. The longest wavelength waves are radio, around 3 meters. so, as you progress, the wavelengths get longer.
A trumpet plays its 3rd harmonic at 510 Hz. It then opens a valve, which adds 0.110 m to its length. What is the new 3rd harmonic frequency? (Hint: Find the original length.) (Speed of sound = 343 m/s) (Unit = Hz)
Answer:
f = 459.8 Hz
Explanation:
When a trumpet is playing it is an open tube at both ends, therefore there is a belly in each one, the resonance occurs to
λ = 2L 1st harmonic
λ = 2L /2 2nd harmonic
λ = 2L /3 3rd harmonic
the speed of the wave is
v = λ f
λ = v / f
we substitute in the third harmonic
[tex]\frac{v}{f} = \frac{2L}{3}[/tex] (1)
L = [tex]\frac{3}{2} \ \frac{v}{f}[/tex]
L = [tex]\frac{3}{2} \ \frac{343}{ 510}[/tex]
L = 1.009 m
indicates that to add ΔL = 0.110 m, so the total length is
L_total = L + ΔL
L _total = 1.009 + 0.110
L _total = 1,119 m
we use equation 1
f = [tex]\frac{3}{2} \ \frac{v}{L_{total}}[/tex]
f = [tex]\frac{3}{2} \ \frac{343}{1.119}[/tex]
f = 459.8 Hz
A table exerts a force on the ground. The ground exerts
A. no force on the table
B. a greater and opposite force on the table
C. an equal and opposite force on the table
D. a lesser an opposite force on the table
Answer:
hey from what I know the answer is C
Explanation:
When a book is kept on a table , weight (gravitational force) of book acts on table vertically downwards and as a reaction of weight , table also exerts an equal and opposite ( upward) force on book .
What is the density of a 2.5-cm3 glass
marble that has a mass of 7.5 g?
Explanation:
Density=mass/volume
Density=7.5/2.5
density=3g/cm^3
The density of a 2.5-cm3 glass marble that has a mass of 7.5 g is 3g/cm^3.
What do you mean by density ?The density of a material is the measure of how tightly it is packed together. It is expressed as mass per unit volume.
Density Symbol: D or Density Formula: = m/V, where is the density, m is the object's mass, and V is the object's volume.
Density is the amount of "stuff" in a given amount of space. A block of the heavier element lead (Pb), for example, will be denser than a block of the softer, lighter element gold (Au). A Styrofoam block is less dense than a brick. It is expressed in terms of mass per unit volume.
Density = mass / volume
Density = 7.5 / 2.5
density = 3g/cm^3
Thus, The density of a 2.5-cm3 glass marble that has a mass of 7.5 g is 3g/cm^3.
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How did adding mushrooms affect trees?
Which best describes a saturated solution?
A
Additional solvent is able to be dissolved in the solute.
B
Additional solute is able to be dissolved in the solvent.
С
The maximum amount of solvent is dissolved in the solute.
D
The maximum amount of solute is dissolved in the solvent.
The maximum amount of solute is dissolved in the solvent. The correct option is D.
What is a saturated solution?A saturated solution is a type of solution where the maximum amount of solute has been dissolved in a solvent, at a specific temperature and pressure, such that any additional solute added will not dissolve.
A saturated solution is a solution in which the maximum amount of solute has been dissolved in the solvent at a specific temperature and pressure. Any additional solute added to the solution will not dissolve and will instead settle at the bottom of the container as solid particles.
The concentration of a saturated solution is at its maximum level and cannot be increased further unless the temperature or pressure is changed.
Therefore, the correct option is D.
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See The Picture And Anwser
Answer:
[tex]from \: first \: equation \: of \: motion \\ v = u + at \\ a = \frac{v - u}{t} \\ a = \frac{15 - 24}{12} \\ a = - 0.75 \: {ms}^{ - 2} [/tex]
Answer:
a = -0.75 m/s^-2
PLEASE ASAP ILL GIVE BRAINLIEST.
Un repartidor de comida rápida entrega una pizza a una casa que se encuentra a 20 km de distancia y se demora 20 minutos en llegar. De vuelta a la pizzería vuelve más relajado y se demora media hora. ¿Cuál fue su velocidad media en el trayecto completo?
Answer:
La velocidad media en el trayecto completo es 0.8 [tex]\frac{km}{minutos}[/tex].
Explanation:
La velocidad es una magnitud física que expresa la relación entre el espacio recorrido por un objeto y el tiempo empleado para ello.
En otras palabras, la velocidad es una magnitud que relaciona el cambio de posición (o desplazamiento) con el tiempo.
La velocidad media resulta del cociente entre el desplazamiento seguido por un móvil y el tiempo transcurrido que se emplea para realizar dicho desplazamiento:
[tex]velocidad=\frac{desplazamiento}{tiempo}[/tex]
En este caso, un repartidor de comida rápida entrega una pizza a una casa que se encuentra a 20 km de distancia y se demora 20 minutos en llegar. De vuelta a la pizzería vuelve más relajado y se demora media hora. Entonces, el desplazamiento total entre la pizzería y la casa será 40 km, considerando que se dirige a la casa y vuelve a la pizzería.
Por otro lado, el tiempo total será el tiempo en que se dirige a la casa y luego vuelve a la pizzería, es decir 20 minutos + 30 minutos= 50 minutos.
Entonces:
[tex]velocidad=\frac{40 km}{50 minutos}[/tex]
Resolviendo:
velocidad= 0.8 [tex]\frac{km}{minutos}[/tex]
La velocidad media en el trayecto completo es 0.8 [tex]\frac{km}{minutos}[/tex].
The diagram shows a compressed spring between two carts initially at rest on a horizontal frictionless surface. Cart A has a
mass of 2 kilograms and cart B has a mass of 1 kilogram. A
string holds the carts together. After the string is cut and the
two carts move apart, the magnitude of which quantity is the same for both carts?
O inertia
O momentum
O velocity
O kinetic energy
A.2 kg
В.1 kg
Answer:
momentum
Explanation:
the impulse is equal for both carts, the momentum for both carts is zero both before the string is cut and after it is cut
After the string is cut and the carts move apart, the magnitude of momentum is the same for both carts. Hence, option B is correct.
What is Momentum?Momentum is the result of a molecule's mass and velocity. Being a vector quantity, momentum possesses both magnitude and the direction. As according to Isaac Newton's second equation of motion, the force applied on a particle is equivalent to the time change in velocity.
According to Newton's 2nd law, if a particle is exposed to a constant force for a specific period of time, the result of the force and time (referred to as the impulse) is equal to the difference in momentum. In contrast, hand, a particle's momentum is a measurement of the amount of time needed for a consistent force to put it to rest.
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can someone please help me answer these questions
Answer:
the First one i think is D: it increases
The second i think it is B
i think
Explanation:
What scientific law or principle allows us to
say that all the PE is converted to KE?
The law of conservation of energy
Energy cannot be created or destroyed, but it can be changed from one form to another.
KE + PE = constant
Why the impact of the loaded truck on a body coming it’s the way is very large even if the
truck is moving slowly
Answer: due to large momentum
Explanation:
The impact of the loaded truck is very large on a body coming in its way because of the momentum associated with truck. Truck has a huge mass which is responsible for its large momentum.
Momentum is the product of mass and velocity. Even though the velocity of truck is low but it's mass compensates for it to give large momentum. This large momentum can overwhelm any small body at rest or coming in its way.
What acts against the direction of motion and gets larger as an object moves faster
Answer:
Friction
Explanation:
In the event that the power is applied toward the path inverse to the bearing of movement, it goes against the movement of the item and henceforth the speed of the article diminishes.
Then, in the event that the thing continues to move one way, grinding will dominate and go about as the moving variable.
So, the moving factor would be friction.
16.
The laws of physics state that energy _____.
cannot be destroyed
can be created
originates as heat
is electrical
Answer:
Conserved
Explanation:
I think, hope it helps:))
Answer: It cannot be destroyed
Explanation: The law of conservation of energy states that energy may not be created or destroyed.
Question 2 of 10 Which process is the source of all the thermal energy produced by a nuclear reactor? O A. Radioactive decay B. Chemical decay O C. Nuclear fission O D. Nuclear fusion SUBMIT
Answer:
C
Explanation:
A P E X
The process that is the source of all the thermal energy produced by a nuclear reactor is nuclear fission. The correct option is C.
What is nuclear fission?The process by which an atom's nucleus divides into two daughter nuclei in nuclear physics. Fission, the splitting of uranium atoms, is the source of nuclear energy.
This produces heat that creates steam, which a turbine generator uses to produce power. A type of energy emitted by an atom's nucleus, which is composed of protons and neutrons, is known as nuclear energy.
Fission, which occurs when atom nuclei split into several pieces, and fusion, which occurs when nuclei combine, are the two methods by which this type of energy can be created.
Therefore, the correct option is C. Nuclear fission.
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what is instanteanous velocity of the bat at t = 5 s
Which is true about forces? Check all correct answers.
a. Forces are scalar quantities-they do not need direction.
b. Force is directly proportional to acceleration and mass. Objects with bigger mass and higher acceleration can produce bigger forces.
c. Forces are vectors- they always have magnitude and direction.
d. Objects at rest do not have any force acting on them.
e. Gravity only acts on objects that are falling.
f. Forces always require the Agent and the Receiver to touch to take effect.
g. Forces of equal magnitude but in opposite directions have a zero net force and so are in a balanced state- at rest or in motion.
Answer:
one of them is c
Explanation:
Answer:
b. Force is directly proportional to acceleration and mass. Objects with bigger mass and higher acceleration can produce bigger forces.
c. Forces are vectors - they always have magnitude and direction.
g. Forces of equal magnitude but in opposite directions have a zero net force and so are in a balanced state- at rest or in motion.
Explanation:
a. Forces are scalar quantities - they do not need direction.
False - forces are vector quantities, thus have both a magnitude and direction
b. Force is directly proportional to acceleration and mass. Objects with bigger mass and higher acceleration can produce bigger forces.
True - From Newton's 2nd Law [tex]\Sigma F=ma[/tex], we see that force is directly proportional with acceleration and mass.
c. Forces are vectors- they always have magnitude and direction.
True
d. Objects at rest do not have any force acting on them.
False - Counterexample: an object laying at rest on a table has both normal force and the force of gravity acting on it.
e. Gravity only acts on objects that are falling.
False - Gravity acts on any object within the general universe. For an object to experience zero gravity, it would have to be in a vacuum or an infinite distance away from all objects in space.
f. Forces always require the Agent and the Receiver to touch to take effect.
False - Counterexample: Gravity is a no-contact force
g. Forces of equal magnitude but in opposite directions have a zero net force and so are in a balanced state- at rest or in motion.
True - Forces of equal magnitude and opposite direction will cause an object to have zero net force in the respective direction, assuming there are no other forces acting on the object.
La contaminación acústica de acuerdo a la organización mundial de la salud medido en decibeles corresponde
Answer: Si es mayor a 65 dB es considerado dañino.
Explanation: Se considera ruido a todo aquel que supera los 75 dB o torturante aquel mayor a 120 dB según la OMS.
can someone help please and thank you:)
Answer:
The answer is C.
Explanation:
what is the definition of gravity in simple terms?
Answer:
Gravity, also called gravitation, in mechanics, the universal force of attraction acting between all matter. ... On Earth all bodies have a weight, or downward force of gravity, proportional to their mass, which Earth's mass exerts on them. Gravity is measured by the acceleration that it gives to freely falling objects
1 : A force of attraction that tends to draw particles or bodies together.
2 : The attraction of bodies by the force of gravity toward the center of the earth.
3 : Great seriousness.
The sparkle of a diamond is an effect of...
Answer:
As the light moves through the diamond,it is scattered and fractured,creating the sparkle of diamonds are known for . This is the refraction.
whats going on here ??
calculate the weight of an object that has a mass of 100 kg on earth
Answer:
W = 980 N
Explanation:
Weight = Mass x Gravity
Weight = (100kg) x (9.8[tex]\frac{m}{s^2}[/tex])
Weight = 980 N
Given the electron configuration for the following neutral atoms A and B below:
Which statement is false?
(a) energy is required to change I to II
(b) I and II represent different elements
(c) I is the electron configuration of sodium
(d) less energy is required
to remove one electron from II than from I
Why is the sky blue in colour?
[tex] \huge\mathrm{Answer࿐}[/tex]
Our Atmosphere is full of freely subtended particles, and when light from sun strikes the particles then scattering occurs, in which blue colour is most scattered and hence causing Sky to appear blue .
Hope it helps !!
_____________________________
[tex]\mathrm{ \#TeeNForeveR}[/tex]
What must happen for salt and water to form a solution?
O A. The salt and the water must combine to form a new substance.
B. The salt and the water must combine chemically.
C. The water must displace the salt.
O D. The salt must dissolve in the water.
Balance this equation
_SnO2 +_H2-->_Sn +_H20
Answer:
The balanced chemical equation is 1SnO2 + 2H2 --> 1Sn + 2H2O.
Explanation:
The equation is now balanced because both sides have an equal number of reactants and products.
There is 1 Sn on each side, 2 O on each side, and 4 H on each side.