Answer:
solid to gas or gas to liquid
Explanation:
welcome
Answer:
solid to gas or gas to liquid
Explanation:
Edge
The total weight of a car with passengers is 30,000N. The area of contact of each of the four tyres with the ground is 0.025m2. Determine the minimum car tyre pressure
Answer:
The minimum pressure car tire pressure is 300,000 Pa
Explanation:
Pressure
It's a measure of the force exerted by an object per unit surface:
[tex]\displaystyle P=\frac{F}{A}[/tex]
Where F is the force applied on a surface area A.
We are given the total weight of a car with passengers as Ft=30,000 N and we also know the area of contact of each tire with the ground as [tex]A=0.025 m^2[/tex].
The minimum pressure each tire can have is when the total weight is evenly distributed in all four tires, thus F=Ft/4=7,500 N.
Calculating the pressure:
[tex]\displaystyle P=\frac{7,500}{0.025}[/tex]
P=300,000 Pa
The minimum pressure car tire pressure is 300,000 Pa
The input work done on a machine is 9.63 × 103 joules, and the output work is 3.0 × 103 joules. What is the percentage efficiency of the machine?
Answer:
31.15%
Explanation:
The formula used was
((Work output)/(Work input))×100
Answer:
C. 31.1 percent
Two identical spheres (of equal mass) a distance of 10 meters apart exert a force of gravity of 0.00050 N on each other. What are their masses?
Answer:
The gravitational force between two objects is written as:
F = G*m1*m2/r^2
Where:
G = 6.67*10^(-11) m^3/kg*s
m1 and m2 are the masses of the objects.
r is the distance between the objects.
In this case, we know that:
F = 0.0005 N
r = 10m
and because the two spheres are identical, we have that:
m1 = m2 = M
then we have the equation:
0.0005 N = (6.67*10^(-11) m^3/kg*s)*(M^2/(10m)^2)
0.0005 N*(10m)^2/(6.67*10^(-11) m^3/kg*s) = M^2
√( 0.0005 N*(10m)^2/(6.67*10^(-11) m^3/kg*s) ) = M = 27,379.3 kg
The mass of each sphere is 27,379.3 kg
3. What are the forces present on the rope?
Answer:
The pulling force that acts along a stretched flexible connector, such as a rope or cable, is called tension, T. When a rope supports the weight of an object that is at rest, the tension in the rope is equal to the weight of the object: T = mg.
A spacecraft orbiting Earth is both moving forward and
a. at terminal velocity
b. experiencing resistance
c. weightless
d. towards earth
Answer: (A) At terminal velocity ...
Explanation:
I have been trying to do number 2 and I just don’t know what the answer is if you can help me thank you so mush
Answer:
Strong Positive Linear Line Correlation
Explanation:
According to the diagram, there is a strong positive linear line correlation between velocity and distance of galaxies. Hubble showed that galaxies are receding away from people with a velocity that is proportional to their distance from people more distant galaxies recede faster than nearby galaxies.
About the diagram: Velocity is the distance relation among extra-galactic nebulae. Radial velocities is corrected for solar motion, are plotted against distances estimated from involved stars and mean luminosities of nebulae in a cluster. The black discs and full line represent the solution for solar motion by using the nebulae individually; the circles and broken line represent the solution combining the nebulae into groups; the cross represents the mean velocity corresponding to the mean distance of 22 nebulae whose distances could not be estimated individually.
There is a spot of paint on the front wheel of the bicycle. Take the position of the spot at time t=0 to be at angle θ=0 radians with respect to an axis parallel to the ground (and perpendicular to the axis of rotation of the tire) and measure positive angles in the direction of the wheel's rotation. What angular displacement θ has the spot of paint undergone between time 0 and 2 seconds?
Here is the missing information.
An exhausted bicyclist pedal somewhat erraticaly when exercising on a static bicycle. The angular velocity of the wheels takes the equation ω(t)=at − bsin(ct) for t≥ 0, where t represents time (measured in seconds), a = 0.500 rad/s2 , b = 0.250 rad/s and c = 2.00 rad/s .
Answer:
0.793 rad
Explanation:
From the given question:
The angular velocity of the wheel is expressed by the equation:
[tex]\omega (t) =\dfrac{d\theta}{dt}[/tex]
The angular velocity of the wheels takes the description of the equation ω(t)=at−bsin(ct)
SO;
[tex]\dfrac{d \theta}{dt} = at - b \ sin \ ct[/tex]
dθ = at dt - (b sin ct) dt
Taking the integral of the above equation; we have:
[tex]\int \limits^{\theta}_{0} \ d \theta = \int \limits ^{t=2}_{0} at \ dt - (b \ sin \ ct) \dt[/tex]
[tex][\theta] ^{\theta}_{0} = a \bigg [\dfrac{t^2}{2} \bigg]^2_0 - \bigg[ -\dfrac{b}{c} \ cos \ ct \bigg] ^2_0[/tex]
where;
a = 0.500 rad/s2 ,
b = 0.250 rad/s and
c = 2.00 rad/s
[tex]\theta = (0.500 \ rad/s^2 ) \bigg [\dfrac{(2s)^2}{2} \bigg] - \bigg[ -\dfrac{0.250 \ rad/s}{2.00 \ rad/s} \ cos \ (2.00 \ rad/s )( 2.00 \ s) \bigg] - \bigg [ \dfrac{0.250 \ rad/s}{2.00 \ rad/s}\bigg ] cos 0^0[/tex]
[tex]\mathbf{\theta = 0.793 \ rad}[/tex]
Hence, the angular displacement after two seconds = 0.793 rad
Please explain the different ways offense can score and how many points each way is worth? Answer in complete sentences.
Answer:
what sport bruh
Explanation:
Answer:
in wat sport exactly
Explanation:
in eat sport
Why is it hard to respond with action at times?
What is the pigment in the leaves called?
1.Chloroplasts
2.Green
3.Stroma
4.Chlorophyll
Answer: D: Chloroplasts
Explanation:
Answer: d
Explanation:
what is the process of subduction
Answer:
Subduction is a geological process that takes place at convergent boundaries of tectonic plates where one plate moves under another and is forced to sink due to high gravitational potential energy into the mantle. Regions where this process occurs are known as subduction zones.
An 856 kg drag race car accelerates from rest to 105 km/h in .934s. What change in momentum does the force produce? Answer in units of kg • m/s
Part 2: what average force is exerted on the car? Answer in N
Hello!
Topic: Dinamic
Value to calculate: Force
First, we have to calculate the aceleration, for that, lets aplicate the formula:
[tex]\boxed{a=\frac{V-Vi}{t} }[/tex]
How the final velocity is in km/h, we have to convert it on m/s, so:
m/s = km/h / 3,6
m/s = 105 / 3,6
m/s = 29,16
Then, lets replace formula according problem information:
[tex]a = \dfrac{29,16m/s-0m/s}{0,934s}[/tex]
[tex]a =31,22\ m/s^{2}[/tex]
Now, how we have the aceleration, lets applicate second law of newton for calculate the force produced:
[tex]\boxed{F=ma}[/tex]
Replace and resolve it:
F = 856 kg * 31,22 m/s^2
F = 26724,32 kg * m/s^2
Then the force is of 26724,32 kg * m/s^2
But how we know an 1 kg * m/s^2 = 1 N
Then the average of the force is of 26724,32 N
(1) The change in momentum of race car is 89880 kg-km/h.
(2) The average force exerted on the car is of 96231.26 N.
Given data:
The mass of race car is, m = 856 kg.
The initial speed of car is, u = 0 km/h.
The final speed of car is, v = 105 km/h.
The time interval is, t = 0.934 s.
1)
The change in the impact due to average force is known as momentum change. The expression for the change in momentum is given as follows,
[tex]\Delta P = m(v-u)[/tex]
Solving as,
[tex]\Delta P = 856 \times (105-0)\\\\\Delta P = 89880 \;\rm kg.km/h[/tex]
Thus, we can conclude that the change in momentum of race car is 89880 kg-km/h.
2)
Now, use the concept of impulse-momentum which says that the impulse is equal to change in momentum. Which means,
[tex]I = \Delta P[/tex]
And impulse is,
[tex]F \times t = \Delta P\\\\F = \dfrac{\Delta P}{t}[/tex]
Solving as,
[tex]F = \dfrac{89880}{0.934}\\\\F = 96231.26 \;\rm N[/tex]
Thus, we can conclude that the average force exerted on the car is of 96231.26 N.
Learn more about the impulse-momentum theorem here:
https://brainly.com/question/14121529
which type of energy is released when a nucleus is split apart?
a. kinetic energy
b. elastic energy
c. chemical energy
d. nuclear energy
Answer:
D. Nuclear energy
Explanation:
A nucleus is the result of nuclear energy if it is split into an other the same result shall happen it being nuclear energy.
Phich instrument can be used to give a direct measurement of the mass of a rock on moon
Answer:
you can use a balance
Explanation:
when you tend to measure something you are using your brain so why dont you use your brain dimwitt
Very few people have a definite and pure somatotype. True False
Answer: True
Explanation: I got it right on my test :)
A 30kg dog runs at a speed of 15 m/s. What is the dog's Kinetic energy?
Please help! Will mark Brainliest :)
Answer:
i have to say whether its correct or wrong yep
Answer:
C) The direction the car is traveling
Explanation:
Velocity is a vector that contains both direction and magnitude (Speed)
We already know the magnitude... all you need is the direction.
Hope this helps :)
Who could explain the phenomenom of interference of light?
Answer:
When the waves reflected from the inner and outer surface combine they will interfere with each other, removing or reinforcing some parts of white light by destructive or constructive interference. ... This results in color.
Explanation:
this is what we studied
so basically there is like a surface
and 2 different waves coming out of the same source
they will combine and start removing parts of the white light (which originally consists of 6 to 7 colors)
results in showing these colors
i need help this is due to day!! i will give brainliest
Answer:
One arm row: Latissmus Dorsi (Lat)
Dumbell flys: Shoulders
Machine back press: pectorals
Push downs: Triceps
Explanation:
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A ball projected horizontally from 180meter tall building lands 450 meter away from the foot of the building find velocity of the ball after leafs the building find velocity of the ball after it leafs the building
Answer:
74.28 m/s
Explanation:
In this case, it is a zero launch angle in that the object is launched horizontally at a height H.
The formula to apply is:
[tex]R=v_o*\sqrt{\frac{2H}{g} }[/tex]
where
R= range, 450 m
H= height of building ,180 m
g= 9.81
vo= ? initial velocity
Applying the values to the equation;
[tex]450 = v_o*\sqrt{\frac{2*180}{9.81} } \\\\450=v_o*\sqrt{36.70} \\\\450=v_o*6.06\\\\450/6.06 = v_o\\\\74.28 m/s=v_o[/tex]
Bicycle A with mass 40 Kg is traveling with a velocity of 4 m/s and Bicycle B with mass 20 Kg is traveling with a velocity of 2m/s. The two bicycles have kinetic energy
Calculate it and state which bicycle has higher energy and why?
Answer:
bicycle A has a greater K.E.
Explanation:
K.E = 1/2mv²
bicycle A = 1/2 × 40 × 4² = 320J
bicycle B = 1/2 × 20 × 2² = 100J
bicycle A has a greater K.E. because it has bigger mass and moves with faster velocity
Which two explanations are based on personal beliefs?
I A. Certain mineral crystals have properties that help protect the
body from illness.
IB. A constellation's position in the night sky can be used to predict
events in a person's life.
I C. Medical data gathered over many years show that lack of
adequate sleep causes health problems.
D. Observations using microscopes reveal that all known organisms
are composed of tiny structures called cells.
I E. Data gathered during experiments show that there is an inverse
relationship between the force of gravity and distance.
Answer:
The correct options are A and B
Explanation:
Personal beliefs can be described as beliefs that have not been scientifically proven. These beliefs are generally as a result of religion, culture or tradition. Scientifically in theory, these beliefs lack clear path of possibility. For example, being in possession of certain mineral crystals in order to help protect the body against illness have a little possibility of being scientifically (in theory) explained. There is also no scientific evidence to support this claim.
There is also no scientific evidence to support the idea of the constellation's position to predict events in a person's life. This also has little possibility of being theoretically explained in science.
It should however be noted that there are exceptions/coincidences that suggest these events happen as it has been listed in the two options.
Answer: A and B!
Explanation: Just took the quiz.
Someone please help will mark as brainliest
Answer:
yes I agree to his opion cause freedom is important just like everyones rights and if you give up hope i think he means if you give up hope, hope is lost you kind lost everything else
Explanation:
hope it helps a little :)
forces acting on a ball as it is being squeezed
An object is dropped into a beaker containing liquid the object drops to the bottom of the beaker therefore
An object is dropped into a beaker containing liquid the object drops to the bottom of the beaker therefore the density of the object is greater than that of liquid inside the beaker.
What is density?The density of a substance indicates how dense it is in a given area. Mass per unit volume is the definition of a material's density. In essence, density is a measurement of how closely stuff is packed. It is a particular physical characteristic of a specific thing.
The Greek scientist Archimedes made the discovery of the density principle. The letter D can also be used to signify density instead of the symbol ρ .
According to Archimedes principle, if an object is dropped into a beaker containing liquid the object drops to the bottom of the beaker, the density of the object is greater than that of the liquid inside the beaker.
Learn more about density here:
https://brainly.com/question/29775886
#SPJ6
4. A car, initially traveling east with a speed of
5.0 m/s, is accelerated uniformly at 2.0 m/s2 east for
10 s along a straight line. During this 10 s
interval the car travels a total distance of
A. 50 m
B. 60 m
C. 100 m
✓ D. 150 m
Answer:
150 m
Explanation:
Given,
u=5m/s
a=2m/s2
t=10s
v=?
s=?
Now,
v=u+at
=5+2×10
=5+20
=25m/s
So,
s=u+v/2×t
=5+25/2×10
=30/2×10
=15×10
=150m
The energy stored inside a battery is best described as...
a. potential energy
b. Elastic
c. Mechanical
d. Kinetic
Answer:
potential energy
Explanation:
by the sun
a student compared two samples of matter. he recorded the results in the chart. Sample A: Appearance: shiny and yellow. Sample B: Appearance: Dull and yellow. Which property do the two samples have in common? A. volume. B. color
Answer:
The answer are B
Explanation:the two samples haves yellow color :)
Answer:
B or 2
Explanation:
both of the samples contain a yellow color.
can anyone help me with this
Answer:
earth is 4.54 billion years old
for an organism to survive they would have to change ( mutate )
A mutation is any permenant change in dna of a gene or chromosome
some mutations are bad and some can be good
Explanation:
Temperatures of gases inside the combustion chamber of a four‑stroke automobile engine can reach up to 1000°C. To remove this enormous amount of heat, the engine utilizes a closed liquid‑cooled system that relies on conduction to transfer heat from the engine block into the liquid and then into the atmosphere by flowing coolant around the outside surface of each cylinder.
Suppose that, in a particular 4‑cylinder engine, each cylinder has a diameter of 8.75 cm, a height of 11.3 cm, and a thickness of 3.14 mm. The temperature on the inside of the cylinders is 195.2°C, and the temperature outside, where the coolant passes, is 130.0°C. The temperature of the incoming liquid (a mixture of water and antifreeze) is maintained at 95.0°C.
What volume flow rate of coolant [tex]\frac{V}{t}[/tex] would be required to cool this engine? Assume that the coolant reaches thermal equilibrium with the outer cylinder walls before exiting the engine. The specific heat of the coolant is 3.75 J/g°C and its density is 1.070×103 kg/m3. The cylinder walls have thermal conductivity of 1.10×102 W/m⋅∘C. Assume that no heat passes through the ends of the cylinders.
Answer:
thats a lot, which one u want me to do?
Explanation: