Answer:
4kgExplanation:
Step one:
given
length of rod=2m
mass of object 1 m1=1kg
let the unknown mass be x
center of mass c.m= 1.6m
hence 1kg is 1.6m from the c.m
and x is 0.4m from the c.m
Taking moment about the c.m
clockwise moment equals anticlockwise moments
1*1.6=x*0.4
1.6=0.4x
divide both sides by 0.4 we have
x=1.6/0.4
x=4kg
The mass of the other object is 4kg
When a red giant star begins to burn helium, it
the outer shell of the star are blown off with big clouds of gas and dust which is know as a nebula
How are the heating systems similar and how are they different?
Answer:
You can have gas heating systems which run on gas. You can also have electric heating systems that run on electric.
Explanation:
When a ray of light passes through a boundary between two transparent media, it changes direction. What is this phenomenon known as?a. reflection.
b. refraction.
c. interference.
d. diffraction.
e. dispersion.
Answer:
The phenomenon is known as refraction. The correct option is B
Explanation:
Refraction is defined as the property of a change in the direction of light, when it passed from one medium to another. In the process of refraction, the direction to which the rsy of light follows changes as well as the velocity, but the frequency remains the same along the line of propagation.
The extent of propagation is determined by the nature of the medium allowing the propagation.If a ray of light hits the surface of a sheet of glass, some light will be reflected by the surface of the glass. However, much of the light will pass through the glass, because glass is transparent. This effect also o view with mediums such as water.
The reason why the light rays bends away from its normal direction is that light slows down when it passes from the less dense air into the denser glass or water.
Other properties of light includes:
--> light travels in a straight line
--> light can be reflected
--> light can be diffracted
--> light can be polarized
What are the traditional states of matter, and what type of property is a matter’s state?
(60 points pls help thx)a worksheet on calculating speed
3. A car travels at 30mph for 2hours and then 40mph
for 3hours in the same direction. What is the average
speed of the vehicle's entire trip?
Answer:
1. 60/90
2.67/63
Explanation:
Categorize each quantity as being either a vector or a scalar. Explain your reasoning. a. 20 degrees Celsius b. 256 bytes c. 4000 Calories
Answer:
a. Scalar quantity
b. Scalar quantity
c. Scalar quantity
Explanation:
Generally, all physical quantities can be categorized into vector or scalar. Vector quantities can be described by both magnitude and direction, while scalar quantities can be described only by magnitude.
a. 20 degrees Celsius is a measure of a definite value of temperature, thus it is a scalar quantity. As temperature has no direction.
b. 256 byte is the storage capacity of an electronic device. It is a scalar quantity since it is described only by magnitude and no direction.
c. 4000 Calories is an amount of energy in a given substance. Thus, it is a scalar quantity.
A machinist measures the length of a bolt. The length is 72.22 cm. What is the length in millimeters?
Answer:
The length of the bolt in millimeters is 722.2 mm
Explanation:
Given;
length of the bolt in centimeters, = 72.22 cm
The length of the bolt in millimeters is given by;
Multiply the length by 10
= 72.22 cm x 10
= 722.2 mm
Therefore, the length of the bolt in millimeters is 722.2 mm
A book rest on a table. The book pushes downward on the table with a force of 8 N According to Newton's 3rd law of motion, what prevents the book from accelerating downward?
Answer:
In the case of the table and the book, the gravitational attraction is absolutely negligible, since they are both so tiny. The force that the table experiences because of the book is what is being called normal force. The table then exerts an equal and opposite force.
Explanation:
Explanation:
The law of motion states that for every action there is an equal yet opposite reaction. so that mean that the book is being acted on by another force which would be the table. It does not move because the table is acting on it with 8n of upward force creating an equilibrium keeping the book at rest.
Can someone please do this I’m completely lost in physics I don’t get shi, so if you have the time to go on the website and solve it please do so
(3x104 kg) (4 x 104 m)
6 x 104 s
Answer:
77852x∧100 kgms
Explanation:
Betelgeuse - the right shoulder star of Orion - is a red giant star. Its radiation peaks in the infrared at λ = 800 nm. What is the surface temperature of the star?
Answer:
3622.5 K
Explanation:
The radiation of red giant star is 800nm.
We need to find the surface temperature of the star. Let it is T.
Using Wein's displacement law to find it as follows :
[tex]\lambda=\dfrac{C}{T}[/tex]
C is constant an T is temperature
[tex]T=\dfrac{C}{\lambda}\\\\T=\dfrac{2.898\times 10^{-3}}{800\times 10^{-9}}\\\\ T=3622.5\ K[/tex]
So, the surface temperature of the star is 3622.5 K.
People who do very detailed work close up, such as jewellers, often can see objects clearly at much closer distance than the normal 25.0 cm. What is the power of the eyes of a woman who can see an object clearly at a distance of only 9.75 cm? Assume a distance from the eye lens to the retina of 2.00 cm. Number ________ diopters What is the size of the image of a 2.00 mm object, such as lettering inside a ring, held at this distance? Enter your answer as a positive number if the image is upright, and negative if it is inverted. Number ________mmWhat would the size of the image be if the object were held at the normal 25.0 cm? Number ________mm
Answer:
a) P = 60.26 diopter , b) h´ = -0.4 mm , c) h´ = -0.16 mm
Explanation:
a) For this exercise we use the equation for thin lenses
1 / f = 1 / p + 1 / q
where f is the focal length, p the distance to the object and q the distance to the image
in this case q is the distance from the lens to the retina q = 2.00 cm
the distance p is the distance from the object to the lens p = 9.75 cm
1 / f = 1 / 9.75 + 1/2
1 / f = 0.6026 cm⁻¹
power is the inverse of the focal length in meters
P = 1 / f [m]
P = 0.6026 102
P = 60.26 diopter
b) the size of the image
m = - p / q
m = - 2 / 9.75
m = -0.2 X
if we assume that the object is right
m = h´ / h
h´ = m h
h´ = -0.2 2
h´ = -0.4 mm
if the height of the object h is straight the image and inverted
c) if the object were at p = 25.0 cm
m = - 2/25
m = -0.08
h´ = -0.08 2
h´ = -0.16 mm
the image would be much smaller
A screen is placed 50.0 cm from a single slit, which is illuminated with light of wavelength 690 nm. If the distance between the first and third minima in the diffraction pattern is 3.00 mm, what is the width of the slit?
Answer:
d = 2.3 x 10⁻⁴ m = 0.23 mm
Explanation:
In a Young's Double Slit experiment the distance between two consecutive minima is given as:
Δx = λL/d
for, the distance between the 1st and 3rd minima it will become:
2Δx = 2λL/d
where,
2Δx = distance between 1dt and 4rd minima = 3 mm = 0.003 m
λ = wavelength = 690 nm = 6.9 x 10⁻⁷ m
L = Distance of Screen = 50 cm = 0.5 m
d = width of slit = ?
Therefore,
0.003 m = 2(6.9 x 10⁻⁷ m)(0.5 m)/d
d = 6.9 x 10⁻⁷ m/0.003 m
d = 2.3 x 10⁻⁴ m = 0.23 mm
Select ALL that apply. The stages of a human's lifespan include:
A.Infancy, early childhood, adolescence
B.High school, college
C.Adulthood, elderly
D.Workforce, retirement
Answer:
The answers are A and C
Explanation:
the order of a humans lifespan is: Infancy, early childhood, adolescence, adulthood, then elderly
A 1100 kg sports car accelerates from 0m/s to 32m/s in 10 seconds. What is the average power of the engine?
Answer:
The average power of the engine of the sports car is 56.32 kW
Explanation:
Given;
mass of the sports car, m = 1100 kg
initial velocity of the sports car, u = 0 m/s
final velocity of the sports car, v = 32 m/s
time of motion, t = 10 s
The kinetic energy of the car is given by;
K.E = ¹/₂m(v² - u²)
K.E = ¹/₂mv²
K.E = ¹/₂ x 1100 x 32²
K.E = 563200 J
The average power of the engine of the sports car is given by;
Pavg = Energy / time
Pavg = 563200 / 10
Pavg = 56320 W
Pavg = 56.32 kW
Therefore, the average power of the engine of the sports car is 56.32 kW
A proton moves at a speed of 850 m/s in a direction perpendicular to a magnetic field with a magnitude of 0.70 T. What is the magnitude of the magnetic force on the proton?
Answer:
The magnitude of the magnetic force on the proton is 9.532 x 10⁻¹⁷ N
Explanation:
Given;
speed of proton, v = 850 m/s
magnitude of magnetic field, B = 0.7 T
Charge of proton, q = 1.602 x 10⁻¹⁹ C
The magnitude of the magnetic force on the proton;
F = qvB
F = ( 1.602 x 10⁻¹⁹)(850)(0.7)
F = 9.532 x 10⁻¹⁷ N.
Therefore, the magnitude of the magnetic force on the proton is 9.532 x 10⁻¹⁷ N
750 kg car zooms away from a red light with an acceleration of 7.8 m/s squared . What is the average net force in Newtons that the car experiences?
Answer:
5850 NExplanation:
The force acting on an object given it's mass and acceleration can be found by using the formula
force = mass × acceleration
From the question we have
force = 750 × 7.8
We have the final answer as
5850 NHope this helps you
How much would you have to eat for your appendix to explode ? I ate so much on thanksgiving and i need to know i’m very scared
Answer:
I don't think your appendix can explode because you ate too much honestly. It's not even possible to eat so much that your appendix explodes, and if you're feeling any pain it definitely isn't because your appendix is about to explode, believe me. Also you could just type it into the internet, that'd be a much faster solution.
if a satellite travels 62,000,000 miles from earth, how can we write it in scientific notation
Answer:
6.2 x 10^6
Explanation:
The 6 at the end is an exponent the carrot is the symbol
Answer:
6.2*10^7 miles
Explanation:
Please help me out as soon as you can. Really need help.
How does simple machines make work easier?
The simple machines can help make work easier by working quicker than the people and making other peoples jobs easier.
Explanation:
I hope this helped.
Nicki rides her bike at a constant speed for 6 km. That part of her ride takes her 1 h. She then rides her bike at a constant speed for another
km. That part of her trip takes her 2 h. What is her average speed?
Answer:
Nicki's Average Speed is 6 km
Explanation:
If Nicki rides her bike at a constant speed for 1 hour, that means that Nicki will stay at a constant rate for another 2 hours.
Thus your answer: 6 km
Write 3 paragraphs explaining conduction, convection, and radiation. The paragraph must include examples of each and explain the type of energy. It also must include conductors and insulators and various examples of each.
Answer:
Eeeeeeeeeeeeeeeeeeeeeeeeeee
What is the acceleration of a 25 kg mass pushed by a 10 N force?
Answer:
0.4 m/s²Explanation:
The acceleration of an object given it's mass and the force acting on it can be found by using the formula
[tex]a = \frac{f}{m} \\ [/tex]
f is the force
m is the mass
From the question we have
[tex]a = \frac{10}{25} = \frac{2}{5} \\ [/tex]
We have the final answer as
0.4 m/s²Hope this helps you
Answer:
0.4 m/s²
Explanation:
hope this helps
What’s the answer to this question
Answer:
space = 66.24 [m]
Explanation:
To solve this problem we must remember that the average speed is defined as the relationship between a space traveled over a certain time.
[tex]Av = \frac{space}{time}[/tex]
where:
space [m]
Av = average velocity = 3.6 [m/s]
time = 18.4 [s]
[tex]space = 3.6*18.4\\space = 66.24 [m][/tex]
The crests of a transverse wave are like the...
A. crests of a primary wave
B. troughs of a longitudinal wave
C. rarefactions of a secondary wave
D. compressions of a longitudinal wave
The rests of a transverse wave are like the compression of the longitudinal waves.
What is transverse wave?In terms of physics, a transverse wave refers to the wave where oscillations should be perpendicular to the direction of the wave's in advance. This is in contrast to a longitudinal wave that travels in the direction of its oscillations.
Therefore, we can conclude that The rests of a transverse wave are like the compression of the longitudinal waves.
Learn more about waves here: https://brainly.com/question/1820914
What happens when you pay bills using a computer
Answer:
Money is transferred from your account to creditors' accounts
Explanation:
When performing online activities that require payments of bills on a computer. The very moment you decided to pay your bills using a computer, your money will be transferred immediately from your account to creditors' accounts. This will imply that the transaction is successful and you have paid your bills.
Hence, in this case, the correct answer is "Money is transferred from your account to creditors' accounts."
Answer:
U become g**
Explanation:
Ur a**
true or false gravitational pull decreases with an increase of distance between two objects
Answer:
true! : )
(i underlined the place where the answer is the other information is just as important but if you do not want to read it you do not have to)
Explanation:
Since gravitational force is inversely proportional to the square of the separation distance between the two interacting objects, more separation distance will result in weaker gravitational forces. So as two objects are separated from each other, the force of gravitational attraction between them also decreases. the greater the mass, the greater the gravitational pull. gravitational pull decreases with an increase in the distance between two objects. Since gravitational force is inversely proportional to the square of the separation distance between the two interacting objects, more separation distance will result in weaker gravitational forces. So as two objects are separated from each other, the force of gravitational attraction between them also decreases.
6. A person lifts a package weighing 75 N. If she lifts it 1.2 m off the floor,
what is the packages potential energy?
Answer:
90J
Explanation:
Given parameters:
Weight of package = 75N
Height = 1.2m
Unknown:
Potential energy = ?
Solution:
Potential energy is energy due to the position of a body. It is mathematically expressed as;
Potential energy = mgh
m is the mass
g is the acceleration due gravity
h is the height
The weight is mg
Potential energy = 75 x 1.2 = 90J
