Answer:
327.6 is the answer but there is 2 sig figs in 14 so change it to 330
so 330 is the final answer
hope this helps
have a good day :)
Explanation:
The multiplication product of 23.4 × 14 is 327.6. However, there is only two significant figures in 14. So we have to take the answer in 2 significant figure. Hence, the product can be written as 3.3 × 10².
What are significant figures ?Significant figures are number of digits which can be counted as certain values associated with some uncertainties as well. There are certain rules regrading the count of significant figures in a number.
The zeros after a non-decimal number cannot be taken as significant. For eg, in 4500, there are only two significant figures. The common rule for all the arithmetic operation is that, the significant figures in the product have to be equal to the number of significant figure in the number in the operation with least significant figures.
Here, the one with least significant figures is 14. It have two significant figures. Now, product of the two numbers is :
23.4 × 14 = 327.6
But the rounded product for correct significant figure is 3.3 × 10².
Find more on significant figures:
https://brainly.com/question/14359464
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Questions:
1. A piano is moved up a ramp that is 3 m long with a force of 5
N. What is the work done on the piano? What is the name of the
simple machine for "ramp”? (6)
Formula
Show your steps (with
units)
Answer (with units)
Sentence
Simple Machine
Answer:
Workdone = 15 Nm
Explanation:
Given the following data;
Length of ramp (distance) = 3 m
Force = 5 N
To find the work done on the piano;
Mathematically, work done is given by the formula;
Workdone = force * distance
Substituting into the formula, we have;
Workdone = 5 * 3
Workdone = 15 Nm
II. The name of the simple machine for "ramp” is an inclined plane.
Typically, an inclined plane has a flat supporting surface that is set at an angle with an end higher than the other and it can be used to lift or lower an object.
Nguồn phát của tia X
Answer:
Từ ánh sáng từ mặt trời đến nhiệt liên tục phát ra từ cơ thể chúng ta, có nhiều dạng bức xạ khác nhau. Tuy nhiên, khi nói đến bức xạ và nguy cơ ung thư, hầu hết mọi người đều nghĩ đến tia X và tia gamma.
Các nguồn tự nhiên của tia X và tia gamma bao gồm khí radon, chất phóng xạ trong lòng đất và các tia vũ trụ tấn công hành tinh từ không gian. Tuy nhiên, loại bức xạ này cũng có thể do con người gây ra. Tia X và tia gamma được sản xuất trong các nhà máy điện hạt nhân để sử dụng trong các xét nghiệm hình ảnh y tế, điều trị ung thư, chiếu xạ thực phẩm và máy quét an ninh sân bay với liều lượng nhỏ.
English:
From light from the sun to the heat that is continuously emitted from our bodies, there are many different forms of radiation. However, when it comes to radiation and cancer risk, most people think of X-rays and gamma rays.
Natural sources of X-rays and gamma rays include radon gas, underground radioactive material, and cosmic rays that strike the planet from space. However, this type of radiation can also be caused by humans. X-rays and gamma rays are produced in nuclear power plants for use in medical imaging tests, cancer treatments, food irradiation and airport security scanners in small doses.
The earth revolves around the sun in its orbit as shown in the figure. Is there any difference in the amount of gravitational force of the sun towards the earth when the earth moves from a point A to point B on its orbit? Explain.
Answer:
No.
Explanation:
There is no change in gravitational force based on the sizes remaining the same. If there was a change in gravitational force the orbits of all planets would change.
a boy throws a ball straight up into the air. it reaches its highest point after 4 seconds.how fast was the ball going when it left the boy's hand
Answer:
Explanation:
The most important thing to remember about parabolic motion in physics is that when an object reaches its max height, the velocity right there at the highest point is 0. Use this one-dimensional motion equation to solve this problem:
v = v₀ + at and filling in:
0 = v₀ + (-9.8)(4.0) **I put in 4.0 for time so we have more than just 1 sig fig here**
0 = v₀ - 39 and
-v₀ = -39 so
v₀ = 39 m/s
.
Evidence obtained by simply copying files changes the date stamp. These files are not allowed to be used as admissible evidence
True or false
Answer:False
Explanation:
A 1234 kg freight car moving at 6 m/s runs into a 2468 kg freight car at rest. They stick together upon collision. What was the final combined speed?
Answer:
2 m/s
Explanation:
Applying,
The law of conservation of momentum
Total momentum before collision = Total momentum after collision
mu+m'u' = V(m+m')............... Equation 1
Where m = mass of the first freight car, m' = mass of the second freight car, u = initial velocity of the first freight car, u' = initial velocity of the second freight car, V = final combined velocity/ speed.
make V the subject of the equation
V = (mu+m'u')/(m+m')........... Equation 2
From the question,
Given: m = 1234 kg, m' = 2468 kg, u = 6 m/s, u' = 0 m/s (at rest)
Substitute these values into equation 2
V = [(1234×6)+(2468×0)]/(1234+2468)
V = 7404/3702
V = 2 m/s
If the charge q is placed at the centre of the line joining two equal charges Q such that the system is in equilibrium then the value of q is?
Really need it, with a good explanation, will appreciate such answer.
Answer:
q is 0
Explanation:
Now another charge q is placed at the middle point of the line and the system is in equilibrium, that means net force on charge q is 0
Let's just suppose this situation, so it's like this;
Q --------------- q --------------- Q
Now, acc. to the question, the system is equilibrium which means that possibly both the Q should be exerting some pressure on the middle charge q, so let's suppose Q be +ve and q be -ve
The charge that we have kept at a certain distance something like this;
+Q --------------- -q --------------- +Q
<––– d ––– > <––– d ––– >
Now, we +Q will be exerting some force on the another +Q that it should be acc. to columbs law like this;
F = k × Q1Q2/r²
F = k × QQ/(2d)²
F1 = k × Q²/4d²
Also, when this +Q will exert force on -q, it could be written as;
F = k × Q1Q2/r²
F2 = k × Qq/d²
From the question, we know that the system is a equilibrium which means that these two force F1 and F2 will be equal to each other;
= k × Q²/4d² = k × Qq/d²
Eliminate the common values= Q/4 = q
Wait wait! The answer had still not came! remember this q is actually -q?= Q/4 = -q
= -Q/4 = q
So, the charge on q is -Q/4. :)
A bullet is fired at 660 ms and strikes a target 200 m away. How long has it
taken to hit the target?
Calculate the mass of a bus if it produces a force of 14,000 N while accelerating
at a rate of 5 ms 2 ?
You toss a ball at 30 ms' straight upward. How much time will the ball take
to reach the top of its path?
35
Answer:
Explanation:
The first question utilizes the one-dimensional equation
Δx = [tex]v_0t+\frac{1}{2}at^2[/tex] where Δx is the displacement of the bullet, v₀ is te initial velocity with which the bullet was fired, a is the acceleration in the horizontal dimension (which is always 0!), and t is the time in seconds. That's our unknown here. Filling in:
[tex]200.0=660t+\frac{1}{2}(0)t^2[/tex] and
200.0 = 660t so
t = .30 seconds
The second question is a simple application of Newton's 2nd Law which says force = mass times acceleration:
14000 = m(5.0) so
2800 kg = m
The third question is a bit more interesting. We will use the one-dimensional equation
[tex]v=v_0+at[/tex] where v is the final velocity of the ball (which is always 0 at the top of its projectile path!), v₀ is the initial velocity of the ball, a is the pull of gravity on the ball, and t is the time it takes to do this. Filling in:
0 = 30 + (-9.8)t and
-30 = -9.8t so
t = 3.1 seconds
Which of the following statements is false?
A. Scalar quantities have size or magnitude only
B. Vector quantities have both magnitude and direction
C. Mass, length and time are all scalar quantities
D. Distance, velocity and acceleration are all vector quantities
Answer:
I think it might be c.
Explanation:
Hope it's right :3
If a machin
has a mechanical advantage of 4, and an ideal mechanical advantage of 5. What is the
efficiency of the machine?
Answer:
Efficiency = 80%
Explanation:
Given the following data;
Mechanical advantage (MA) = 4
Ideal mechanical advantage (IMA) = 5
To find the efficiency of the machine;
Mathematically, the efficiency of a machine is given by the formula;
[tex] Efficiency = \frac {MA}{IMA} * 100 [/tex]
Substituting into the formula, we have;
[tex] Efficiency = \frac {4}{5} * 100 [/tex]
[tex] Efficiency = 0.8 * 100 [/tex]
Efficiency = 80%
How do sports play a role in American Culture? Is this different from how sports play a role in other cultures?
PLEASE ANSWER QUICKLY!!!
Answer: American sports culture has a much greater appreciation of and emphasis towards collegiate and high school sports. This may be the strongest difference between American sports culture and every other countries' sports culture.
cuál es el peso de una pelota de masa de 10 kg en jupiter?
Answer:
245.25
Explanation:
Jupiter's gravity is 2.5 times earths
Weight = Mass x Gravity
Weight = 10 x (9.81 x 2.5)
Weight = 245.25 N
when work is done on a body its energy
Fill in the blanks! Please, help me ASAP
I’ll give extra points
Answer:
Please find attached the required filled diagram created with MS Visio
Explanation:
Waves → Are produced by → Vibrating molecules → Which pass energy to → neighboring molecules
Waves → Are → Repeating disturbances → That transfers → Energy → Through → Matter or Space
Waves → that need a → Medium → are called → Mechanical → And can be either → Compressional → Or → Transverse
Una araña con una masa de 0.26g cuelga verticalmente de uno de sus hilos. El hilo tiene una constante de resorte de 7.1N/m. ¿Cuál es el aumento de la longitud del hilo causado por la araña?
Answer:
Extension, e = 0.0000359 meters
Explanation:
Given the following data;
Mass = 0.26 g
Spring constant = 7.1 N/m
To find the extension of the thread;
Conversion:
1000 grams = 1 kg
0.26 grams = 0.26/1000 = 0.00026 kg
First of all, we would determine the force acting on the spider;
Force = mass * acceleration due to gravity
Force = 0.00026 * 9.8
Force = 0.00255 N
Next, we would determine the extension;
Force = spring constant * extension
Substituting into the equation, we have
0.00255 = 7.1 * extension
Extension, e = 0.00255/7.1
Extension, e = 0.0000359 meters
The energy diagram shows the changes in energy during a chemical reaction.
Which statement best describes the total energy change of the system?
Potential energy
n
Reaction progress
O A. Energy is released, and the products have higher potential energy,
O B. Energy is absorbed, and the reactants have higher potential
energy
O C. Energy is released, and the reactants have higher potential energy.
O D. Energy is absorbed, and the products have higher potential energy.
Statement B best describes the total energy change of the system. Energy is absorbed, and the reactants have higher potential energy.
What is a chemical reaction?One or more compounds, known as reactants, are transformed into one or more distinct substances, known as products. Such a process is known as a chemical reaction.
The energy diagram depicts how energy fluctuates during a chemical process.
The statement that best characterizes the overall energy change of the system is, "energy is absorbed, and the reactants have greater potential energy".
Hence, statement B best describes the total energy change of the system.
To learn more about the chemical reaction refer to the link;
https://brainly.com/question/22817140
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Answer: Energy is RELEASED and the REACTANTS have HIGHER potential energy.
Explanation: I took the test
our sun and any star far away in another galaxy are too distant to feel a gravitational force between them
Answer:
Hello There!!
Explanation:
The answer is False.
hope this helps,have a great day!!
~Pinky~
Answer:
ture.
Explanation:
the correct answer is true.
Which grouping describes only the living part of an ecosystem?
A. environment
B .niche
C. community
D. habitat
Which of the following does not use analog signals?
Am radio
VGA connected monitor
iPod
Clock with a second hand
Answer:
iPod does not use analog signals
Explanation:
Desde un globo se deja caer un objeto ¿Que velocidad tendra y que distancia habra caido al cabo de 12 segundos?
Answer:
velocidad = -117.6 m/s
Al cabo de 12 segundos, la distancia que el objeto habra caido es 705.6 m
Explanation:
Sabemos que un objeto que está en el aire es atraído por la fuerza gravitatoria. Si ignoramos fuerzas como la fricción del aire, entonces la aceleración del objeto será solamente la aceleración gravitatoria, que sabemos que es 9.8m/s^2
Entonces la aceleración del objeto es:
A(t) = -9.8m/s^2
Donde el signo menos se debe a que esta aceleración es hacia abajo.
Para obtener la velocidad, integramos sobre el tiempo:
V(t) = ( -9.8m/s^2)*t + V0
Donde V0 es la velocidad inicial, como el objeto se deja caer, la velocidad inicial es cero, entonces tenemos:
V(t) = ( -9.8m/s^2)*t
Para la posición integramos nuevamente:
P(t) = (1/2)*( -9.8m/s^2)*t^2 + P0
donde P0 es la posición inicial, en este caso podemos definir la posición inicial como cero, solo por comodidad, entonces la posición se escribe como:
P(t) = (1/2)*( -9.8m/s^2)*t^2
Ahora queremos saber:
La velocidad del objeto al cabo de 12 segundos. Acá simplemente reemplazamos t por 12s en la ecuación de la velocidad, así obtenemos:
V(12s) = ( -9.8m/s^2)*12s = -117.6 m/s
También queremos saber la distancia que ha caído al cabo de 12 segundos.
Esto es igual a la diferencia entre la posición para t = 12s y la posición para t = 0s
P(12s) - P(0s) = (1/2)*( -9.8m/s^2)*(12s)^2 - (1/2)*( -9.8m/s^2)*(0s)^2
= -705.6 m
Esto significa que el objeto ha caído 705.6 metros al cabo de 12 segundos.
What is the force weight of a jaguar who jumps 3 meters to a tree branch with 2670 J of work?
Answer:
[tex]we \: know \: energy \: = \: force \: \times distance \\ e = f \times d \\ so \: f \: = \frac{e}{d} \\ so \: th \: force \: here \: = (\frac{2670}{3}) newton \\ = 890newton[/tex]
Hope it helps
what happens to the piece of plastic?
Answer:
it reheated and use form another
There are 2 pans of water, one has 10 mL in it and one has 500 mL. You add 3000 joules of energy, which one has the bigger change in temperature?
Answer:
The change in temperature is bigger for the first pan which contains 10 mL of water.
Explanation:
in one pan
mass, m = 10 mL = 10 g
in another pan
mass, m' = 500 mL = 500 g
Heat, H = 3000 J
Specific heat of water, c = 4.2 J/gC
Let the change in temperature in first pan is T and in the second pan is T'.
Use the formula of heat
H = m c T
For the first pan
3000 = 10 x 4.2 x T
T = 71.42 C
For the second pan
3000 = 500 x 4.2 x T'
T' = 1.42 C
So, the change in temperature is bigger for the first pan.
Matthew was bowling. He bowled with a 12 pound ball at first then used a 10 pound ball. If matthew uses the same amount of force to roll the bowling balls, which one would roll faster?
F- the 12 pound ball
G - they would roll the exact same speed
H - the 10 pound ball
J - none of the above
Answer:
Rotational inertia depends both on an object's mass and how the mass is distributed relative to the axis of rotation. ... We can't just consider the mass to be concentrated at its center of mass. When a mass moves further from the axis of rotation it becomes more difficult to change the rotational velocity of the system.So the ball with 10 pounds of the ball can have more probability to do an absolute pure rotation along rolling translation.And also the specific material from which it is made up of. As If the body is rigid have the points dont move from their position when a magnitude of force applied then the body woukd perform a well rotation than a resistantant body.
Hope it helps
Shaneil was able to hold up a 20N box for 40s to test her strength. What power was exerted to hold up the box?
Answer: 0
Explanation:
Given
Shaneil hold the 20 N box for 40 s
Since there is no movement of the box, so velocity associated with it is zero and the workdone by the shaniel is also zero.
Power is the rate of doing work. Therefore, it is also zero.
Plz someone help me Asap
Answer:
all I know is C
are there more questions? anyone?
-KARL IS STOOPID
Explanation:
How are the lenses of 3-D glasses polarized?
Both lenses are polarized horizontally.
Both lenses are polarized vertically.
They are not polarized.
One lens is polarized horizontally, and one is polarized vertically.
Answer:
I think the last one which one lens is polarized horizontally, and one is polarized vertically
Elements in the same group have…
A. A wide range of chemical properties
B. The same atomic radius
C. Number of electrons in its outer shell.
D. Same number of protons
E. The same number of electron shells.
The work done to lift a 3kg mass to a
height of 10 m is
Answer:
The answer is 300Joules
Which of the following was an effect of the French Revolution?
A.
the construction of schools and colleges that spread Enlightenment thought
B.
the reorganization of the French government based on heredity and nobility
C.
the elimination of special privileges for members of the first and second estates
D.
the creation of a new social class comprising the nobles and the bourgeoisie
Answer: C. the elimination of special privileges for members of the first and second estates
Explanation:
The French Revolution was a period of political change in France. The French Revolution led to the proclamation of the first French Republic, radical political and social change, creation of constitutional monarchy, formation of the French consulate etc.
From the options given, the effect of the French Revolution was the the elimination of special privileges for members of the first and second estates. Therefore, the correct option is C.