Answer:
See the explanation below
Explanation:
The watt (the power) is equal to the relationship between the work and the time in which that work is performed.
[tex]P = W/t[/tex]
where:
W = work [J] (units of Joules)
t = time [s].
Now 1000 [W] are equal to 1 [kW]
And 1000000 [W] are equal to 1 [MW]
The horsepower is the unit of power in the imperial system of units.
And 745.7 [W] are equal to 1 [Hp]
Cuál es la diferencia entre fricción beneficiosa y perjudicial? Pon 5 ejemplos de cada uno.
Answer:
Difference is given below.
Explanation:
The main difference between beneficial and harmful friction is that beneficial friction is necessary for performing different activities while on the other hand, harmful effect of friction is destroy different parts of products and machines. examples of beneficial friction are walking, holding things, rubbing hands to produce heat, running etc whereas examples of harmful friction are destruction of sole, slipping, tearing of machine's part, Wet roads and Mudslides etc.
Integrated Science- Study Guide: Water
Please help me out here, report cards due dec.18, and once I'm done with this study guide I have an EXAM and its 21 question so please answer each question correctly so my score won't be low thanks! And, also I really appreciate ya'll helping me in this app
Each question is 3 points so, I'll make this question worth...15 points Please answer each question correctly thank you!
Answer:
Not all the pictures are popping up. So I can't answer them all. :(
Explanation:
The fist one is B. And the second is D. That's all I can see. I hope this helps a little bit :(
PLEASE HELP!!!!!
When current flows through this wire, what forms around the wire?
A. Electromagnetism
B. An electric field
C. An attraction between charged particles
D. A magnetic field
ONLY REPLY IF YOU KNOW THE ANSWER TO IT
Answer:The answer is A
Explanation:
Answer:
A. Electromagnetism
Explanation:
Whenever current travels through a conductor (the wire) a magnetic field is generated. Due to being a wire, the current formed is electric, so this making it an electromagnetic field.
Show that on a hypothetical planet having half the diameter of the Earth but twice its density, the acceleration of free fall is the same as on Earth.
Answer:
Steps include:
Find the ratio between the mass of this hypothetical planet and the mass of planet earth.Calculate the ratio between the acceleration of free fall (gravitational field strength) near the surface of that hypothetical planet and near the surface of the earth.Assumption: both planet earth and this hypothetical planet are spheres of uniform density.
Explanation:
Mass of that hypothetical planetLet [tex]M_0[/tex], [tex]r_0[/tex], and [tex]\rho_0[/tex] denote the mass, radius, and density of planet earth.
The radius and density of this hypothetical planet would be [tex](1/2)\, r_0[/tex] and [tex]2\, \rho_0[/tex], respectively.
The volume of a sphere is [tex]\displaystyle V = \frac{4}{3}\, \pi\, r^3[/tex].
Therefore:
The volume of planet earth would be [tex]\displaystyle V_0 = \frac{4}{3}\, \pi\, {r_0}^{3}[/tex].The volume of this hypothetical planet would be: [tex]\displaystyle V = \frac{4}{3}\, \pi\, \left(\frac{r_0}{2}\right)^3 = \frac{1}{6}\, \pi\, {r_0}^3[/tex].The mass of an object is the product of its volume and density. Hence, the mass of the earth could also be represented as:
[tex]\displaystyle M_0 = \rho_0\, V_0 = \frac{4}{3}\, \pi\, {r_0}^{3}\, \rho_0[/tex].
In comparison, the mass of this hypothetical planet would be:
[tex]\begin{aligned}M &= \rho\, V\\ &= (2\, \rho_0) \cdot \left(\frac{1}{6}\, \pi\, {r_0}^3\right) \\ &= \frac{1}{3}\, \pi\, {r_0}^{3}\, \rho_0 \end{aligned}[/tex].
Compare these two expressions. Notice that [tex]\displaystyle M = \frac{1}{4}\, M_0[/tex]. In other words, the mass of the hypothetical planet is one-fourth the mass of planet earth.
Gravitational field strength near the surface of that hypothetical planetThe acceleration of free fall near the surface of a planet is equal to the gravitational field strength at that very position.
Consider a sphere of uniform density. Let the mass and radius of that sphere be [tex]M[/tex] and [tex]r[/tex], respectively. Let [tex]G[/tex] denote the constant of universal gravitation. Right next to the surface of that sphere, the strength of the gravitational field of that sphere would be:
[tex]\displaystyle g = \frac{G \cdot M}{r^2}[/tex].
(That's the same as if all the mass of that sphere were concentrated at a point at the center of that sphere.)
Assume that both planet earth and this hypothetical planet are spheres of uniform density.
Using this equation, the gravitational field strength near the surface the earth would be:
[tex]\displaystyle g_0 &= \frac{G \cdot M_0}{{r_0}^2}[/tex].
.
On the other hand, the gravitational field strength near the surface of that hypothetical planet would be:
[tex]\begin{aligned}g &= \frac{G \cdot (M_0/4)}{{(r_0/2)}^2} = \frac{G \cdot M_0}{{r_0}^2}\end{aligned}[/tex].
Notice that these two expressions are equal. Therefore, the gravitational field strength (and hence the acceleration of free fall) would be the same near the surface of the earth and near the surface of that hypothetical planet.
As a side note, both [tex]g[/tex] and [tex]g_0[/tex] could be expressed in terms of [tex]\rho_0[/tex] and [tex]r_0[/tex] alongside the constants [tex]\pi[/tex] and [tex]G[/tex]:
[tex]\begin{aligned}g &= \frac{G \cdot M}{r^2}\\ &= \frac{G \cdot (1/3)\, \pi\, {r_0}^3 \, \rho_0}{(r_0/2)^2} = \frac{4}{3}\,\pi\, G\, r_0\, \rho_0\end{aligned}[/tex].
[tex]\begin{aligned}g_0 &= \frac{G \cdot M_0}{{r_0}^2}\\ &= \frac{G \cdot (4/3)\, \pi\, {r_0}^3 \, \rho_0}{{r_0}^2} = \frac{4}{3}\,\pi\, G\, r_0\, \rho_0\end{aligned}[/tex].
Select the correct answer.
These waves are traveling at the same speed. Which wave has the highest frequency?
A
B
C
D
Answer:
a is the correct choice
Explanation:
The wave has the highest frequency in option A.
What is frequency?The frequency of a wave is the number of cycles completed by the wave in a given period of time. Frequency is measured in Hertz (Hz).
How to calculate frequencyThe frequency of a wave is calculated as follows;
[tex]v = f \lambda\\\\f = \frac{v}{\lambda}[/tex]
where;
f is the frequencyv is the speed of the waveλ is the wavelengthFrom the given chart, in option A the wave completed more cycles in the given period of time.
Thus, the wave has the highest frequency in option A.
Learn more about frequency of waves here: https://brainly.com/question/19638389
What is the measure of the average kinetic energy of the particles in a material known as?
A. heat transfer B. radiation
C. temperature
D. thermal expansion
Answer:
The answer is temperature
The pupil of your eye
increases and -decreases in síze -Allows light to enter the eye
-both are true
Answer:
What is the question?
Explanation:
If you tell me the question I can help.
Please help me out on this question pleasee:>>
Answer:
graph 1
Explanation:
When it comes to a graph showing "constant acceleration," the line should be straight and upward (positive acceleration) or straight and downward (negative acceleration). The variables for acceleration are time and velocity. The independent variable (time) should be placed on the x-axis while the dependent variable (velocity) should be placed on the y-axis. As time increases, the velocity increases the same way. It doesn't slow down or changes. This makes it constant. They are also directly proportional to each other. This is evident on the first graph.
Billy is pulling his sister Joslyn in the sled. Based on your knowledge of F=ma, describe what would
happen to the motion of the sled if Joslyn's friend Lisa also wanted to ride.
Answer:
the motion of the sled decrease
Explanation:
the mass increase
The acceleration of the sled will is inversely proportional to the mass on it. Therefore, the motion of the sled would slow if Joslyn's friend Lisa also wanted to ride.
What is acceleration?Acceleration in mechanics can be described as the rate of change of velocity of an object with respect to time. The acceleration of an object is a vector quantities with magnitude and direction.
The S.I. unit for acceleration can be represented as m/s² the net balance of all external forces acting is equal to the magnitude of the net resulting force.
The force (F) acting on an object is equal to the product of the mass (m) of the object and acceleration (a) of an object.
F = ma
And, a = F/m
As shown in the above equation, the mass of the object is inversely proportional to the acceleration of the object, therefore, the acceleration of the sled decrease as the mass on it increases.
Learn more about acceleration, here:
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A 13561 N car traveling at 51.1 km/h rounds
a curve of radius 2.95 × 102 m.
The acceleration of gravity is 9.81 m/s
a) Find the centripetal acceleration of the
car. Answer in units of m/s
Find the force that maintains circular motion.
Answer in units of N.
c) Find the minimum coefficient of static friction between the tires and the road that will
allow the car to round the curve safely.
Answer:
a) The centripetal acceleration of the car is 0.68 m/s²
b) The force that maintains circular motion is 940.03 N.
c) The minimum coefficient of static friction between the tires and the road is 0.069.
Explanation:
a) The centripetal acceleration of the car can be found using the following equation:
[tex] a_{c} = \frac{v^{2}}{r} [/tex]
Where:
v: is the velocity of the car = 51.1 km/h
r: is the radius = 2.95x10² m
[tex] a_{c} = \frac{(51.1 \frac{km}{h}*\frac{1000 m}{1 km}*\frac{1 h}{3600 s})^{2}}{2.95 \cdot 10^{2} m} = 0.68 m/s^{2} [/tex]
Hence, the centripetal acceleration of the car is 0.68 m/s².
b) The force that maintains circular motion is the centripetal force:
[tex] F_{c} = ma_{c} [/tex]
Where:
m: is the mass of the car
The mass is given by:
[tex] P = m*g [/tex]
Where P is the weight of the car = 13561 N
[tex] m = \frac{P}{g} = \frac{13561 N}{9.81 m/s^{2}} = 1382.4 kg [/tex]
Now, the centripetal force is:
[tex] F_{c} = ma_{c} = 1382.4 kg*0.68 m/s^{2} = 940.03 N [/tex]
Then, the force that maintains circular motion is 940.03 N.
c) Since the centripetal force is equal to the coefficient of static friction, this can be calculated as follows:
[tex] F_{c} = F_{\mu} [/tex]
[tex] F_{c} = \mu N = \mu P [/tex]
[tex] \mu = \frac{F_{c}}{P} = \frac{940.03 N}{13561 N} = 0.069 [/tex]
Therefore, the minimum coefficient of static friction between the tires and the road is 0.069.
I hope it helps you!
Compare an Earth year to a cosmic year
According to Newton's third law of motion, if you push against a wall, the wall will __________.
Answer:
push up agaisnt you with equal force.
Answer:
c
Explanation:
2. At the start of an experiment, a lab cart is moving with a velocity of 0.5 m/s to the right. The lab cart's
trip (motion) lasted 5 seconds. How far did the cart travel?
Answer:
2.5m
Explanation:
Speed/velocity = 0.5m/s
Time = 5s
speed = Distance/Time
Distance = Speed x Time
Distance = 0.5 x 5
Distance = 2.5m
Students set up a controlled experiment (please help I am so tired and unable to function lol)
A plant growing toward a light source is an example of an organism... *
A plant growing towards a light source is an example of an organism of Phototropism
You apply a 325 N force to a heavy crate with a rope that makes a 29.0° angle with the horizontal, if you pull the crate a distance of 5.37 m, how much work was done by you?
Answer:
W = 1526.43 J
Explanation:
Given that,
Force acting on a heavy crate, F = 325 N
The rope will make 29.0° angle with the horizontal
The distance covered by the crate, d = 5.37 m
We need to find the work done by the crate. The work done by an object is given by :
[tex]W=Fd\cos\theta\\\\=325 \times 5.37\times \cos29\\\\=1526.43\ J[/tex]
So, the required work done is 1526.43 J.
calculate the speed of a person who travels 600km in 8 hrs express in m/s
please urgent will surely mark u the brainliast!!!!!!
Answer:
20.83 m/sExplanation:
The speed of an object can be found by using the formula
[tex]v = \frac{d}{t} \\ [/tex]
d is the distance
t is the time taken
From the question
600 km = 600,000 m
8hrs = 28,800 s
We have
[tex]v = \frac{600000}{28800} = \frac{6000}{288} = \frac{125}{6} \\ = 20.83333...[/tex]
We have the final answer as
20.83 m/sHope this helps you
Answer:
20.833333... m/s or 20 & 5/6 m/s
Explanation:
You want to convert km to meters, and hours to seconds. You do "dimensional analysis," which is just multiplying fractions so that units cancel.[tex]\frac{600 km}{8hr} * \frac{1hr}{60mins} * \frac{1min}{60sec} = \frac{600km}{28,800sec} = \frac{6km}{288sec}[/tex]
so now we have km/sec, but we need m/s, so...
[tex]\frac{6km}{288sec} * \frac{1000m}{1km} = \frac{6000m}{288sec} = \frac{125m}{6sec} = 20\frac{5}{6} m/s = 20.83333... m/s[/tex]
During which phase of the moon does a lunar eclipse occur
Answer:
Full moon
Explanation:
Question 2 of 10
A football is kicked with a velocity of 18 m/s at an angle of 20". What is the
ball's acceleration in the horizontal direction as it flies through the air?
O A. 16.9 m/s2
O B. 0 m/s2
O C. 9.8 m/s2
O D. 6.1 m/s2
Answer:
B
Explanation:
The question does not specify any outside forces that could slow down the ball horizontally. There fore the ball does not accelerate or decelerate horizontally. Therefore, a = 0m/s2
WHo is Rick...from adult swim
Answer:
rick, also known by his fans as they benevolently call him as "Uncle Rick"
Explanation:
he is the one and only author of his trademark mythology
known best for his PJO, HBO and TOA series, uncle rick is one of the best things to ever happen to this planet
Two pebbles are dropped into a pool of water as shown. If a new wave with a
greater amplitude results, which kind of wave interaction has occurred?
Answer:
Constructive interference
Explanation:
Answer:
C. Constructive interference
Explanation:
by how many times will the kinetic energy of a body increaseif its speed is tripled? show by calculation.
Answer:
9 times
Explanation:
Mass of a body remains constant.
Let the mass of a body be 'm'
Let the speed of the body be 'v'
Initial Kinetic Energy (K.E.) = [tex] \frac{1}{2} m {v}^{2} [/tex]
When speed is tripled , new speed = 3v
Mass of body = m (Mass is always constant)
Final Kinetic Energy (K.E.") =
[tex] \frac{1}{2} \times m \times {(3v)}^{2} [/tex]
[tex] = > \frac{1}{2} \times m \times 9v[/tex]
[tex] = > 9( \frac{1}{2} m {v}^{2} )[/tex]
But we already know that [tex]k.e. = \frac{1}{2} m {v}^{2} [/tex]
Hence
[tex] = > final \: k.e. = 9(initial \: k.e.)[/tex]
Two 100 ohm resistors are connected in series and they are connected to seven 1.5V DC. What is the total current flowing in the circuit?
I = V/Rt = 1.5/(100+100) = 1.5/200 = 0.0075 A ....or 0.0075*1000 = 7.50 mA
I = V/Rt
= 1.5/(100+100) = 1.5/200
= 0.0075 A ....or 0.0075*1000 = 7.50 mA
What is Current?In a full electrical circuit, current is the rate at which electrons move past a certain point. Current = flow, at its most fundamental level.
The international unit for measuring current is an ampere (AM-pir), sometimes known as an amp. It describes how many electrons (sometimes referred to as "electrical charge") travel past a certain point in a circuit over a specified period of time.
In a circuit, a current of 1 ampere corresponds to the movement of 1 coulomb of electrons, or 6.24 billion (6.24 x 1018) electrons, through a single location in a second.
Therefore, I = 0.0075 A ....or 0.0075*1000 = 7.50 mA
To learn more about current, refer to the link:
https://brainly.com/question/2264542
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Would you rather have no air conditioning or no heating? Explain your answer
What is the speed of an object at rest?
0 m/s
O 1 m/s
O 10 m/s
Answer:
1 m/s so number 2 is the right one
Explanation:
so when it is at rest it still has some of the left over energy so it would be at 1 m/s
What’s the answer????
Help my cat is constipated what do I do
Answer:
Increase Water Consumption
Try a New Diet
Help Your Cat Maintain a Healthy Weight
Increase Exercise and Enrichment
Minimize Stress and Anxiety
Add More Litter Boxes
Try Fiber or Probiotics
Ask Your Vet About Over-the-Counter Laxatives
Explanation:
Hope this helps ;)
Where on a roller coaster are there equal amounts of potential energy and kinetic energy?
Answer:
Picture?
Explanation:
The roller coaster will have equal kinetic and potential energy at any point starting from rest and reaching the minimum height.
The given problem is based on the concepts and fundamentals of kinetic energy and potential energy. The energy of an object by virtue of its position is known as kinetic energy. And the energy of object by virtue of its position is called potential energy.
In the given problem, the roller coaster will have highest potential energy at maximum height, but will have least kinetic energy there.Similarly, it will have maximum kinetic energy at the bottom of slide, but will have least potential energy there.So, at any point between starting from rest and reaching minimum height it will have both potential and kinetic energy in equal magnitude.Thus, we can conclude that the roller coaster will have equal kinetic and potential energy at any point starting from rest and reaching the minimum height.
Learn more about the kinetic and potential energy here:
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If a student has a mass of 75 kg, what is her weight on Earth?
7.65 N
075N
76.5 N
735 N
Answer:
735
Explanation:
w=mg
w=75*9.8=735N
An airplane's speed increased from 100m/s to 160m/s, at the average rate of 15m/s^2. How long did it take for the plane to complete this increase in speed?
Answer:
4s
Explanation:
Using the formula of motion as follows:
V = u + at
Where;
V = final velocity (m/s)
U = initial velocity (m/s)
a = acceleration (m/s)
t = time (s)
Based on the provided information, v = 160m/s, u = 100m/s, a = 15m/s², t = ?
V = u + at
160 = 100 + 15t
160 - 100 = 15t
60 = 15t
t = 60/15
t = 4seconds.
Therefore, the time it takes for the plane to complete this increase in speed is 4s.