H = mc∆T
where, H=heat energy
c = SHC
H = 2*921*(40-20)
H = 36840J
H = 36.84KJ
The energy transferred to it is 36.84KJ
The energy transferred to aluminum from 20°C to 40 °C is equal to 36840 J.
What is the specific heat capacity?The specific heat capacity can be described as the quantity of heat required to increase the temperature of 1 unit of substance by one degree Celsius. The specific heat capacity of the substance depends upon the nature of the substance.
The mathematical equation is used to calculate the specific heat is equal to:
[tex]Q = m\times C\times \triangle T[/tex]
Given, the mass of the aluminum block, m = 2 Kg
The initial temperature of aluminum, T₁ = 20 °C
The final temperature of the aluminum, T₂ = 40 °C
The specific heat capacity of aluminum, C = 921 J/kg°C
The energy transferred to the aluminum block:
Q = 2 × 921 × (40-20)
Q = 36840 J
Therefore, the energy transferred to aluminum from 20°C to 40°C is 36840 J.
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One of your classmates, in a fit of unrestrained ego, jumps onto a lab table:
a) Draw a qualitative force diagram for the table. Use marks on the vectors to show the balance of forces.
b) Your classmate’s mass is 65 kg and the table weighs 0 N. Calculate the normal force on the table by the floor. Show your work!
c)Find the mass of the table
The equilibrium condition allows finding the results for the forces of the system are
a) The free body diagram is in the attachment
b) The normal force is N = 737 N
c) The mass of the table is 10.2 kg
Newton's second law indicates that the net force is proportional to the product of the mass and the acceleration of the bodies, in the special case that the acceleration is zero, it is called the equilibrium condition
∑ F = 0
Where the bold letters indicate vectors, F is the external forces
a) A free body diagram is a scheme of the forces without the details of the bodies, in the attachmentt we see a free body diagram of the system.
b) The reaction force of the ground is applied in each of the legs of the table, in general this force has the same magnitude in each leg, therefore in Newton's second law we can place it as a single force
N = N₁ + N₂ + N₃ + N₄₄
Let's apply the equilibrium condition
N - [tex]W_m -w_{table}[/tex] = 0
N = [tex]W_m +w_{table}[/tex]
N = [tex]M_m g + w_{table}[/tex]
They indicate the pose of the boy is 65 kg, for the weight of the table of a laboratory table is approximately 100 N
N = 65 9.8 + 100
N = 737 N
c) To calculate the mass of the table we use the relation
W = [tex]m_{table}[/tex] g
[tex]m_{table} = \frac{w_{table}}{g}[/tex]
[tex]m_{tabble}= \frac{100}{9.8}[/tex]
[tex]m_{table}[/tex]e = 10.2 kg
In conclusion using the equilibrium condition we can find the results for the forces are
a) The free body diagram is in the attachment
b) The normal force is N = 737 N
c) The mass of the table is 10.2 kg
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HELP ME PLZZZ
You attach a cart with a mass of
0.92 kg to a spring and compress the cart-
spring system. The spring constant for the spring is 130 N/m. Your objective is
to propel the cart with a velocity of 1.4 m/s along a frictionless surface. How
need to compress the spring in order to meet your target velocity?
far do
you
một vật dao động trong 10 phút thực hiện 500 dao động tính chu kì và tần số dao động
Answer:
Explanation:
T = 10(60)/500 = 1.2 s
f = 1/T = 0.83 Hz
balls and rods set up to represent a solar system
a set of organs and structures that provide digestion in the human body
the defense plan of a football team drawn on a whiteboard
Which option correctly identifies each description?
I. system
II. model
III. systemI. system, , II. model, , III. system , ,
I. model
II. model
III. systemI. model, , II. model, , III. system , ,
I. model
II. system
III. model
, I. model, , II. system, , III. model
I. system
II. system
III. model
. The artificial sweetener NutraSweet is a chemical called aspartame (C14H18N2O5). What is (a) its molecular mass (in atomic mass units)? (3) (b) the mass (in kg) of an aspartame molecule?
The molecular mass, in atomic mass unit, of aspartame would be 294 amu while the mass, in kg, of an aspartame molecule would be 0.294 kg
Aspartame has the chemical formula C14H18N2O5
C = 12, H = 1, N = 14, O = 16
(a) Molecular weight = (12x14) + (1x18) + (14x2) + (16x5)
= 168 + 18 + 28 + 80
= 294 amu
(b) Mass of 1 molecule of aspartame = mole x molar mass
= 1 x 294
= 294 g
Converting 294 g to kg = 294/1000
= 0.294 kg
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A can of soda weighs 4.7 newtons (N) on Earth's surface. What will it weigh on Planet X where the acceleration due to gravity is 1.82 meters per second^2?
Explanation:
The mass of the soda can is
[tex]m = \dfrac{W}{g} = \dfrac{4.7\:\text{N}}{9.8\:\text{m/s}^2} = 0.48\:\text{kg}[/tex]
The weight of this same soda can on Planet X is
[tex]W = mg_p = (0.48\:\text{kg})(1.82\:\text{m/s}^2) = 0.87\:\text{N}[/tex]
While closing a door of mass 10 kg, a student pushes on it with a force of 25 N. As the door is accelerating to close, what
force does the door exert on the student?
A.5n
b.25n
c.250n
d.35n
Answer:
its 30 n
trust me
the colour of the shadow of coloured objects is not same as the colour of the objects
When an opaque item absorbs all of the light falling from a light source, no light is reflected, and the thing appears black. The color of an object's shadow is independent of its hue; it can be red, yellow, green, or black.
TDS and ppm are common units used to measure
a) the amount of some item in the water.
b) the temperature of water.
c) the direction of water currents.
d) the flow speed of a river
Answer:
c
Explanation:
pls give brainliest have a great day
TDS and ppm are common units used to measure the quantity of substance in the water, therefore the correct answer is option A.
What is a unit of measurement?A unit of measurement is a specified magnitude of a quantity that is established and used as a standard for measuring other quantities of the same kind. It is determined by convention or regulation.
Common units used to measure the amount of material in water are TDS and part per million.
As given in the problem we have to find out for what measurement, the units TDS (Total dissolved solid )and ppm (parts per million) are used.
The total dissolved solid and parts per million are used to measure the amount of substance present in the water, therefore the correct answer is option A.
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Find the center of the galaxy with Shapley method
Answer:
Calculating Center
Shapley correctly determined the galactic center of the Milky Way to be located in the constellation of Sagittarius. He did this by mapping out a three-dimensional distribution of the globular clusters.
Explanation:
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salt is made up of what elements?
A.sodium and chloride
B.sodium and chlorine
C.sodium and copper
D.sodium and oxide
Answer:
The first option sodium and chloride
please give brainliest
Salt is made up of what elements?
= Sodium Chloride....
Linearize equation T=KL^n
9. An elevator uses 650.0 watts to lift 5 passengers 30.0 m in 15.0 seconds. What is the force needed to lift the elevator and the passengers?
Hi there!
We can begin by calculating the total WORK done using the equation:
Power · time = Work
650 · 15 = 9750 J
We know that:
Work = Force · displacement (W = Fd), so:
W/d = F
9750/30 = 325 N
A ball is thrown from the top of a 15.0 m tall building. The ball is initially released with a speed of 25.0 m/s in the direction 30.0 degrees above the horizontal. 2.00 seconds after it was released, the ball is traveling with a speed of 22.8 m/s in the direction 18.2 degrees below the horizontal. Using a coordinate system where x points in the direction the ball was released and y points up, what is the y component of the ball's motion after 2.00 seconds
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Explanation:
Maganda ka Tapos Liit mopa
Answer:
naol may pinoy dito nag jakoI
Answer:
jupiter mars and sun
Explanation:
Calculate the kinetic energy of a 70 kg person moving at a speed of 5m/s
Answer:
875 JExplanation:
The kinetic energy of an object can be found by using the formula
[tex]k = \frac{1}{2} m {v}^{2} \\ [/tex]
m is the mass
v is the velocity
From the question we have
[tex]k = \frac{1}{2} \times 70 \times {5}^{2} \\ = 35 \times 25 \\ = 875[/tex]
We have the final answer as
875 JHope this helps you
Answer:
[tex]\boxed {\boxed {\sf 875 \ Joules}}[/tex]
Explanation:
Kinetic energy is the energy an object possesses due to motion. It is calculated using the following formula:
[tex]KE= \frac{1}{2}mv^2[/tex]
The mass of the person is 70 kilograms and they are moving at a speed of 5 meters per second.
m= 70 kg v= 5 m/sSubstitute these values into the formula.
[tex]KE= \frac{1}{2} (70 \ kg )(5 \ m/s)^2[/tex]
Solve the exponent.
(5 m/s)² = 5 m/s * 5 m/s = 25 m²/s²[tex]KE= \frac{1}{2}(70 \ kg)(25 \ m^2/s^2)[/tex]
Multiply the numbers in parentheses.
[tex]KE= \frac{1}{2} (1750 \ kg*m^2/s^2)[/tex]
Multiply by 1/2 or divide by 2.
[tex]KE= 875 \ kg*m^2/s^2[/tex]
Convert the units. 1 kilogram meter squared per second squared is equal to 1 Joule. So, our answer of 875 kg*m²/s² is equal to 875 Joules.
[tex]KE= 875 \ J[/tex]
The person has 875 Joules of kinetic energy.
10. Based on the current position of the continents, South America is moving away from
Africa in what direction?
A. West
C. North
B. East
D. South
Answer:
D
Explanation:
bexause south jnshdbsjsvhhhgvvvbbhhhhbbbvgj ghbvkbBBCfjnbbcgn. gxb NBCxbncc gcbnbyd vvvv b jb jbhhhhhvvhbvvhjjnnjj,jzjsjdndjjshshdjsbddvdusvusgavahmmsbyurdvsbsjsiwjSCjDHLseekscoopDJxxvisoscoopxxviwellAbbistopDHLshopgogogogotoFL
An LED bulb transfers 200J of energy in 20s. Its power rating is ...
Answer:
[tex]\huge\boxed{\sf P = 10\ Watts}[/tex]
Explanation:
Given:
Energy = E = 200 J
Time = t = 20 s
Required:
Power = P = ?
Formula:
P = E / t
Solution:
P = 200 J / 20 s
P = 10 Watts
[tex]\rule[225]{225}{2}[/tex]
Hope this helped!
~AH1807An empty 230 kg elevator accelerates upward
at 1.7 m/s^2
The acceleration of gravity is 9.8 m/s^2.
What is the tension in the cable that lifts
the elevator cab?
Answer in units of N.
Answer:
7.2 as used in the equation
If the mass is 2.0 kg and the acceleration is 5 m/s/s, then what is the force?
Answer:
Explanation:
F = ma = 2.0(5) = 10 N
Does a paddle boat’s wheel rotate clockwise or counterclockwise? PLS HELP
Which diagram illustrates that matter is always conserved in a chemical reaction?
Answer:
Only the third option has the same number of each size and color circles on either side of the arrow.
Explanation:
I believe it represents the dissolution of two molecules of hydrogen peroxide into two water molecules and an oxygen gas molecule.
The first one balances oxygen but changes sulfur with either carbon or nitrogen
The second one needs 5 oxygen gas pairs instead of a single one on the left to balance the right side. Represents oxidation of a propane molecule if given enough oxygen.
The fourth one has an extra nitrogen on the left side. The hydrogen is balanced. Making amonia.
2. What are the units of mass?
kg
N
m/s
m/s^2
(kg)(m/s)
m
S
Answer:
Kg
Explanation:
The units of mass are gram (g) , kilograms (Kg)
But SI of mass accepted is Kilograms (Kg)
Answer:
kg
Explanation:
the s.i unit is kilogram21) A charged polyester ball is placed over a charged PVC pipe. The ball, which
has a mass of 1.2 grams, rests 42 cm above the pipe. If the ball and pipe have
the same negative charge, what is the charge on the ball?
The negative charge on the polyester ball is -1.53 x 10⁻⁶ C.
The given parameters;
mass of the ball, m = 1.2 gdistance between the ball and the pipe = 42 cm = 0.42 mThe gravitational force on the ball is calculated as follows;
F = mg
F = 0.012 x 9.8
F = 0.12 N
The electrostatic force on the ball is calculated as follows;
[tex]F= \frac{kq^2}{r^2} \\\\q^2 = \frac{Fr^2}{k} \\\\q = \sqrt{\frac{0.12 \times (0.42)^2}{9\times 10^9}} \\\\q =+/ -\ \ 1.53 \times 10^{-6} \ C\\\\q =-\ \ 1.53 \times 10^{-6} \ C[/tex]
Thus, the negative charge on the polyester ball is -1.53 x 10⁻⁶ C.
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Tốc độ v của một vật được cho bởi phương trình v = At
3
– Bt, trong
đó t là thời gian.
(a) Xác định thứ nguyên của A và B.
(b) Đơn vị SI của các hằng số A và B là gì?
If v(t) is speed measured in meters per second (m/s), and t is time measured in seconds (s), then the constants A and B in
v(t) = At ³ - Bt
must have units of m/s⁴ and m/s², respectively; otherwise, the equation is dimensionally inconsistent.
[m/s] = A [s]³ - B [s]
[m/s] = [m/s⁴] [s]³ - [m/s²] [s]
[m/s] = [m/s] - [m/s]
[m/s] = [m/s]
A ball is dropped from a tower that is 206 m high, How long does it take to reach the ground?
It will take 6.42 s for the ball that is dropped from a height of 206 m to reach the ground.
From the question given above, the following data were obtained:
Height (H) = 206 m
Time (t) =?NOTE: Acceleration due to gravity (g) = 10 m/s²
The time taken for the ball to get to the ground can be obtained as follow:
H = ½gt²
206 = ½ × 10 × t²
206 = 5 × t²
Divide both side by 5
[tex]t^{2} = \frac{206}{5}\\\\ t^{2} = 41.2[/tex]
Take the square root of both side
[tex]t = \sqrt{41.2}[/tex]
t = 6.42 sTherefore, it will take 6.42 s for the ball to get to the ground.
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what does that mean?
Answer:
Acceleration is the rate at which the velocity changes .
Hope it's help you !!A sports car of mass 1000 kg can accelerate from rest to 27 m/s in 7.0 seconds. What is the average forward force on the car?
Group of answer choices
a.2.6 x 10^2 N
b.3.9 x 10^3 N
c.2.7 x 10^4 N
d.1.9 x 10^5 N
Answer:
Explanation:
F = ma = mΔv/Δt = 1000(27 - 0)/(7.0 - 0) = 3,857.1428...
b. F = 3.9 x 10³ N
Explain in terms of refraction and wavelength, why dispersion of white light happens.
Pls help
I will put brainliest
Answer:
terms of refraction and wavelength, why dispersion of white light happens.
Explanation:
hope it helps
Which of the following processes is an important part of star formation? A. nuclear fusion B. nuclear fission C. molecular fusion D. molecular fission
Answer:
B
Explanation:
Answer:
Option A is correct.
Explanation:
At the temperature [tex]10^{7}K[/tex] the hydrogen atoms fuse to form helium thus a large amount of heat is produced and stars are formed.
What causes a star to form?Due to gravitational pull the particles and the molecules of gases become condense and by which it becomes hot. The process goes unless the temperature of the core becomes 10,000,000K.
At this temperature, the fusion takes place and energy is released.
Thus the star shines.
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