Answer:
Q = 41800[J]
Explanation:
These types of problems can be solved using the following heat transfer equation for quarps that increase or decrease their temperature as a function of mass.
[tex]Q=m*C_{p}*DT[/tex]
where:
Q = Heat absorbed [J]
m = mass = 2 [kg]
DT = temperature change = 5 [°C]
Cp = specific heat of the water = 4180 [J/kg*°C]
[tex]Q=2*4180*5\\Q=41800[J][/tex]
Units of energy (Joules) [J]
Describe how elements are different from atoms
Answer:
An atom is the part of an element. A particular element is composed of only one type of atom. Atoms are further composed of subatomic particles called electrons, protons and neutrons. Elements can combine with each other to form molecules via chemical reaction.
In an open circuit ____________.
Question 34 options:
a light bulb would produce light
current will flow
current will not flow
more than one resistor is in the circuit
a resistor controls the flow of current
Answer:
The current will not flow
Explanation:
An open circuit is a circuit that is not complete it has an opening Therfor the current can not flow.
A 1 kg box is sitting on a flat horizontal surface that has a coefficient of static friction value of 0.8. What answer best states the minimum force required to move the box in the horizontal direction?
A. >-9.8N
B. >9.8N
C. >7.84N
D. >9N
The normal force felt by the box has magnitude
F[normal] = (1 kg) g = 9.8 N
so that the maximum magnitude of static friction is
F[s. friction] = 0.8 F[normal] = 7.84 N
In order to get the box to move, (C) a minimum force of 7.84 N is required.
12. What is the photoelectric effect, and what experimental evidence led scientists
to discover it? Does this support the wave or particle theory of light? Why?
Answer:
Photoelectric effect, phenomenon in which electrically charged particles are released from or within a material when it absorbs electromagnetic radiation.
Explanation:
The effect is often defined as the ejection of electrons from a metal plate when light falls on it. In a broader definition, the radiant energy may be infrared, visible, or ultraviolet light, X-rays, or gamma rays; the material may be a solid, liquid, or gas; and the released particles may be ions (electrically charged atoms or molecules) as well as electrons. The phenomenon was fundamentally significant in the development of modern physics because of the puzzling questions it raised about the nature of light—particle versus wavelike behaviour—that were finally resolved by Albert Einstein in 1905. The effect remains important for research in areas from materials science to astrophysics, as well as forming the basis for a variety of useful devices.
The emission of electrons from the surface of a metal by the action of light is called photoelectric effect. This phenomenon indicates the behavior of light as particles called photons.
What is photoelectric effect ?The phenomenon of ejection of electrons from the surface of a metal when light of a suitable frequency falls on it is called photoelectric effect. Upon striking the surface of metals , light can set up an electric current which current which corresponds to the flow of electrons. This phenomenon is discovered by Einstein
For instance, visible light can cause ejection of electrons from the surface of metal like cesium which has low ionization enthalpy. This phenomenon is related to the observation that if light is considered as particles.
The particles of light is then called as photoelectrons or photons. Photoelectric effect find application in photoelectric cells used in colorimetry, spectrophotometers etc.
Find more on photoelectric effect:
https://brainly.com/question/26465043
#SPJ6
The electric field between two parallel plates has a magnitude of 180 N/C. The two plates are 2.5 cm apart. Recall that the magnitude of the charge on an electron is 1.602 × 10-19 C.
How much work is done to move an electron from the positive plate to the negative plate?
4.0 × 10-21 J
7.2 × 10-19 J
4.5 J
7200 J
Answer:
b
Explanation:
The amount of work done to move an electron from the positive plate to the negative plate is : 7.2 * [tex]10^{-19}[/tex] J
Step 1: Given data
magnitude of two parallel plate ( E ) = 180 N/C
Distance between plates ( d ) = 2.5 cm
magnitude of charge on electron ( e ) = [tex]1.602 * 10^{-19}[/tex] C
Step 2 : determine the work done
Work done = qV = еEd
= [tex]1.602 * 10^{-19}[/tex] * 180 * 2.5
= 720 * [tex]10^{-22}[/tex] J ≈ 7.2 * [tex]10^{-19}[/tex] J
Hence the amount of work done to move an electron from the positive plate to the negative plate = 7.2 * [tex]10^{-19}[/tex] J
learn more about electric field : https://brainly.com/question/11509296
What are natives from Cambodia called
Answer:
Khmer people make up 90% of the Cambodian population, followed by Vietnamese (5%), with the balance being Chinese, Cham (mostly a muslim people) and indigenous ethnic groups sometimes called Khmer Loeu
Explanation:
Answer:
Khmer
Explanation:
The shortstop plays between first and second base.
true or false
SINGLE TO RIGHT OR CENTER FIELD-On a single to center or right field the first baseman will be the cutoff to home. The shortstop will cover second base.
A sailboat sits tied up at the dock.
Which forces are acting on it?
(A)
applied force and tension force
(B)
electrical force and applied force
(C)
gravity and electrical force
(D)
tension force and gravity
Answer:B
Explanation:i think so im not suree
A sailboat that is tied up at the dock will experience tension force and gravity. Therefore, option (D) is correct.
What is the tension force?Tension can be described as a force acting along the flexible length of a medium such as a rope, string, or cable, or a force carried by a flexible medium.
Tension can be defined as an action-reaction pair acting at each end of the elements. For a rope, tension is present in every section of the rope or string in both directions, apart from their endpoints. Each endpoint of the rope will experience tension and force from the weight attached to it.
Tension can also be defined as a pulling force but the tension is not a pushing force. Ropes or strings are used to exert forces since they transfer a force over a specific distance.
Therefore, sailboats experience the tension force due to the rope with which it is tied at the dock and the force due to gravity.
Learn more about tension, here:
brainly.com/question/13676406
#SPJ2
why do prescribed drugs need to be prescribed by doctors what can happen if you abuse these drugs without a pressure?
Answer:
unperscriebed drugs can e harmful to your body
Explanation:
5. Annie drags her little red wagon with a mass of 5.00 kg, up a hill that has an angle of
elevation of 30.09. She applies the force of 150 N parallel to the incline. Assume that
the wagon starts from rest at the bottom of the hill, and neglect friction (4 points)
a) What is the value of the acceleration of the wagon?
Answer: [tex]25.08\ m/s^2[/tex]
Explanation:
Given
mass of wagon m=5 kg
elevation
[tex]\theta =30.9^{\circ}\\F=150\ N[/tex]
Sin component of weight will oppose the applied force therefore we can write
[tex]F-W\sin \theta=ma\\where\\W=weight(mg)\\a=acceleration[/tex]
[tex]150-5\times 9.8\times \sin (30.09)^{\circ}=5\times a\\125.43=5a\\a=25.08\ m/s^2[/tex]
6. Which phase of matter has a definite volume and shape.
a. solid
b. liquid
c. gas
d.plasma
Answer:
solids
Explanation:
beacause if you take an ice cube does it change its shape no and if it has a definite shape it is sure to have a definite volume
Who would like to be my girlfiend ?
nobody this is a app to help others
Answer:
I bet my great grandmother would
How do I find the change in velocity of a hockey puck?
Mass=0.1697 kg btw
Answer:The foot exerts a force on the ball during a well-defined
duration t (time extent of the contact)
Explanation:
is cereal a soup? explain why or why not
Answer:
no
Explanation:
because its cold
soup is hot
I am giving 18 points. Please try and don’t just do it for the points.
They won’t let me shown the very last picture, it looks like the normal L shape that is in every picture, and just one straight line. L—
Like that.
Which of the following graphs below represents the motion of an object at variable speeds? (3 points)
Distance
(miles)
Time
(hours)
Distance
(miles)
Time
(hours)
Answer:Distance.
Explanation:
You look at yourself in the mirror and notice many of your physical features: your hair color, eye color, your height, dimples, etc. How does DNA relate to the way you look the way you do?
well, you get some DNA from both of your parents, so when you hear the phrase, "You have your mother's eyes!" That means you have some of your mother's DNA that gave you her eye color. The DNA you get from your parents help determine how you look today
PLZZZ HELP
In addition to how much force Earth exerts on the object, which features of an object affect its weight?
A.mass and location of the object
B.shape and location of the object
C.location of the object and how much energy the object has
D.mass of the object and how much energy the object has
Answer/Explanation:
The weight of an object is defined as the force that is exerted due to the gravitational force.
Mathematically, it can be written as :
W = m g
Where
m is the mass of the object
g is the acceleration due to gravity
Also,
We know that the value of g varies with respect to the location. At the equator, the value of g is less as compared to the poles.
The feature of an object that affects its weight are :
Mass of the object
Location of the object
How much force Earth exerts on the object
What type of matter is likely to absorb the most sound waves
Answer:
Things like cloth and softmaterial, pliable, or porous materials
Explanation:
Answer:
Porous absorbers e.g paper, cardboards
A seismic wave is energy released as the result of rock movement along a fault.
T/F
Answer:
TRUE
Explanation:
Dexter Eius is running through the cafeteria when he slips on some mashed potatoes and falls to the floor. (Let that be a lesson for Dexter.) Dexter lands in a puddle of milk and skids to a stop with an acceleration of -4.8 m/s/s. Dexter weighs 780 Newtons. Determine the coefficient of friction between Dexter and the milky floor.
Answer:
μ = 0.49
Explanation:
For this exercise we can use Newton's second law
Y Axis
N - W = 0
N = W = mg
X axis
-fr = ma
the equation for the friction force is
fr = μ N
we substitute
-μ m g = ma
μ = -a / g
we calculate
μ = 4.8 / 9.8
μ = 0.49
What element has conductivity,shiney luster,magnitic
-science
Answer:
The answer to this question is given below in this explanation section.
Explanation:
"What element has conductivity,shiney luster,magnetic
-science"
silicon has a shiny luster,But it is brittle and conducts electricity poorly.Some metalloids change their characteristics when they react with different elements.Luster conductivity and malleability are physical properties can be observed be observed without attempting to change the identity of the substance.The term physical property is an observable characteristics of a substance. in this case the luster conductivity and malleability of metals are the properties, which can be observed by our senses.It differs from chemical properties which can only be observed when the substance change its chemical identity.
Metal are solid at room temperature with the exception of mercury which is liquid at room temperature.Luster metal have the quality of reflection light from its surface and can be polished e.g gold,silver and copper.
where should i graph the distance in a distance time graph
Answer:
Distance in Y axis and Time in axis
Answer:
the distance should be on the Y axis (vertical) and the time should be on the X axis (horizantial)
How much gravitational potential energy does a 1.0 kg hammer have on a shelf 1.5 m above the ground?
Answer:
14.7 J
Explanation:
PE=MGH
PE= 1.0 x 9.8 x 1.5 = 14.7 J
Pls Solve this!!!Im giving 20 points and Brainliest to the one who answers first. HELP ME PLEASE!!!!!!!!
Answer:
i) 2Mg + O₂ + Δ Heat → 2MgO + Δ Energy
ii) The aqueous solution does not change in the color of the blue litmus paper and the blue litmus paper remains blue in color
The aqueous solution formed using the product (MgO) turns the red litmus paper blue
Explanation:
i) Magnesium easily burns in air or oxygen when heated to form a white powder of magnesium oxide. The burning (reaction) of magnesium in air is an exothermic reaction that involves the release of heat and light
The burning of magnesium wire is given by the following chemical reaction;
2Mg + O₂ + Δ Heat → 2MgO + Δ Energy
ii) When magnesium oxide is mixed with water if forms magnesium hydroxide Mg(OH)₂ as shown in the following chemical reaction;
MgO + H₂O → Mg(OH)₂
Magnesium hydroxide is basic and therefore it will turn red litmus paper blue and it does not change the color of the blue litmus paper.
why does the fire snake weight less than it was when it was on fire
Answer:
When Zoe weighs the ingredients (sugar and baking soda), it weighs 25 grams in total. When she weighs the “snake” it weighs 23 grams. This is because some carbon dioxide gas produced during the chemical reaction escapes into the air.
How can shorter string produce more fundamental frequency in two string of different length?
Answer:
Shorter string produces more frequency in two different strings because the equation for frequency is velocity/wavelength , this means that a shorter string creates a shorter wavelength which essentially increases the total frequency produced
in physics, the use of force to move an object is called
Answer:
In physics, work means the use of force to move an object. ... Not all force that is used to move an object does work. For work to be done, the force must be applied in the same direction that the object moves
The use of force to move an object is called Work.
A force can change the motion of an object. A force causes an object with mass to change its velocity (acceleration).
[tex]\bold{Force = Mass\times acceleration}[/tex]
while work is the result of the action when a force causes an object to move in the direction of the force.
[tex]\bold{Work= Force\times Displacement}[/tex]
Therefore, the use of force to move an object is called Work.
To know more visit:
https://brainly.com/question/4095205
Glider A of mass 0.355 kg moves along a frictionless air track with a velocity of 0.095 m/s. It collides with glider B of mass 0.710 kg moving in the same direction at a speed of 0.045 m/s. After the collision, glider A continues in the same direction with a velocity of 0.035 m/s. What is the velocity of glider B after the collision?
Answer:
vB' = 0.075[m/s]
Explanation:
We can solve this problem using the principle of linear momentum conservation, which tells us that momentum is preserved before and after the collision.
Now we have to come up with an equation that involves both bodies, before and after the collision. To the left of the equal sign are taken the bodies before the collision and to the right after the collision.
[tex](m_{A}*v_{A})+(m_{B}*v_{B})=(m_{A}*v_{A'})+(m_{B}*v_{B'})[/tex]
where:
mA = 0.355 [kg]
vA = 0.095 [m/s] before the collision
mB = 0.710 [kg]
vB = 0.045 [m/s] before the collision
vA' = 0.035 [m/s] after the collision
vB' [m/s] after the collison.
The signs in the equation remain positive since before and after the collision, both bodies continue to move in the same direction.
[tex](0.355*0.095)+(0.710*0.045)=(0.355*0.035)+(0.710*v_{B'})\\v_{B'}=0.075[m/s][/tex]
Evelyn is making a model of Earth to show how the physical layers correspond to the compositional layers. Which of the following should Evelyn show in her model?
The physical layers exactly match the compositional layers.-A
The crust is the only compositional layer not included in the physical layers. -B
The physical layers of the inner core and outer core form a single compositional layer. -C
The physical layer of the asthenosphere includes the compositional layer of the crust.-D
on a test need it asap.
I'll report u if u don't give the answer and just want the points.
Answer:
B
Explanation:
What is the Sl unit for momentum?
O kg• m
O kg
O kg• m
O kg
2
m
Explanation:
The S. I. unit of momentum is Kg. m/sechope it helps you
