Answer:
pressure of solid depends on:
1/magnitude of the force
2/contact area
pressure in solid depends on:
1/depth inside the fluid.
2/density of the fluid.
3/Acceleration due to gravity.
Explanation:
1/magnitude of the force:the pressure is directly proportional to the magnitude of the force(thrust). The larger the force, the higher is the magnitude of pressure on the surface.
2/Contact area: the pressure is inversely proportional to the surface area of contact. The larger the contact area, lower is the magnitude of the pressure.
In each cycle, a heat engine performs 710 J of work and exhausts 1480 J of heat. What is the thermal efficiency?
A) 0.24
B) 0.47
C) 1.7
D) 0.32
Answer:
D) 0.32
Explanation:
The computation of the thermal efficiency is given below:
Thermal efficiency is
= 710 J ÷ (710 J + 1480 J)
= 710 J ÷ 2,190 J
= 0.32
Hence, the thermal efficiency is 0.32
Therefore the last option is correct
A car 4m long moving at a velocity of 25m/s was beside a lorry 20m long with a velocity 19m/s at t=0. The distance between them was 10m. How long will it take the car to overtake the lorry.
How much work is done on an object by a force of 10.0 N pushing it 5.00 m?
Work is done on an object by a force of 10.0 N pushing it 5.00 m is 50.0 joule.
What is force?The definition of force in physics is: The push or pull on a massed object changes its velocity. An external force is an agent that has the power to alter the resting or moving condition of a body. It has a direction and a magnitude.
The application of force is the location at which force is applied, and the direction in which the force is applied is known as the direction of the force.
Given parameters:
Force applied on the object is: F = 10.0 N.
Displacement of the object is: d = 5.00 meter.
Hence, Work is done on the object = force × displacement
= 10. N × 5.00 meter
= 50.0 Joule.
So, Work is done on an object by a force of 10.0 N pushing it 5.00 m is 50.0 joule.
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Two cars start moving from the same point on a rectilinear path at the same time, heading to the same destination 90 km away. The first travels at an average speed of 50 km/h and the second at 60 km/h. Deter- mine the time interval separating the arrival of the two cars to their destination.
Answer:
0.3 hour
Explanation:
From the question given above, the following data were obtained:
Distance travelled = 90 km
Speed of 1st car = 50 km/h
Speed of 2nd car = 60 km/h
Time interval separating the two cars =?
Next, we shall determine the time taken for each car to get to the destination. This can be obtained as follow:
For the 1st car:
Distance travelled (d) = 90 km
Speed of 1st car (S₁) = 50 km/h
Time (t₁) =?
Speed = Distance /time
S₁ = d/t₁
50 = 90 / t₁
Cross multiply
50 × t₁ = 90
Divide both side by 50
t₁ = 90 / 50
t₁ = 1.8 hours
For the 2nd car:
Distance travelled (d) = 90 km
Speed of 2nd car (S₂) = 60 km/h
Time (t₂) =?
Speed = Distance /time
S₂ = d/t₂
60 = 90 / t₂
Cross multiply
60 × t₂ = 90
Divide both side by 60
t₂ = 90 / 60
t₂ = 1.5 hours
Finally, we shall determine the time interval separating the arrival of the two cars. This can be obtained as follow:
Time for the 1st car (t₁) = 1.8 hours
Time for the 2nd (t₂) = 1.5 hours
Time interval separating the two cars (tₛ) =?
tₛ = t₁ – t₂
tₛ = 1.8 – 1.5
tₛ = 0.3 h
Thus, the interval separating the arrival of the two cars is 0.3 hour
which organs could be injured if you broke your ribs select all that apply
A.lungs
B.heart
C.brain
D.spinal column
Answer:
If you break a rib in the middle of your rib cage, the sharp end of bone could puncture a lung. If you break a rib toward the bottom of your rib cage, the sharp end of the bone could cause damage to your liver, kidney, or spleen.
Explanation:
Hope this helped..
1. (I) If a particle undergoes SHM with amplitude 0.18 m,
what is the total distance it travels in one period?
Answer:
The total distance the particle travels in one period is approximately 1.131 m
Explanation:
The Simple Harmonic Motion (SHM) of an object can be conceptualized as the uniform circular motion of the object projected on an axis
Therefore, the amplitude of a SHM which is the largest displacement of the motion from its central or equilibrium position is equivalent to the radius of the circular motion
Therefore;
The amplitude of the SHM, a = 0.18 m = The radius of the equivalent circular motion, r
A period of SHM = The time it takes takes to complete one revolution
Therefore, the total distance traveled in one period = The length of 1 complete revolution = The circumference of the equivalent circle describing the SHM
The circumference of the equivalent circle describing the SHM, C = 2·π·r
By substituting the known value for the radius, 'r', we have;
C = 2·π·r = 2 × π × 0.18 m ≈ 1.131 m
Therefore, the total distance the particle travels in one period ≈ 1.131 m
what is meant by velocity and acceleration
Answer:
velocity is a vector- its the rate at which an object changes position
acceleration is the rate of change of velocity
Explanation:
hope this helps
take care, stay safe, and live
-kenma kozume #3
A body is at equilibrium under the action of three forces. One force is 10N acting due east and one is 5N in the direction 60° north east. What is the magnitude and direction of the third force?
Answer:
If the body is in equilibrium the two forces add up and the third is the opposite of the resultant.
F(1x)=F(1)=10 N
F(2x)=F(2)cos60=5•0.5=2.5 N
F(2y) =F(2)sin60 = 5•0.866= 4.33 N
F(3x) =- F(x)=- (10+2.5 )= -12.5 N
F(3y) =- F(2y)= - 4.33 N
F(3) = sqrt{ F(3x)²+F(3y)²} =13.23 N
tan φ = F(3y)/F(3x) =4.33/12.5=0.364
φ = 19.1⁰ (south-west)
Explanation:
Latitude plays a major role in determining the climate of an area. What causes some areas of Earth to receive less direct solar energy than others?
Answer:
Explanation:
The main cause of different parts of the earth receiving different amounts of solar energy is as a result of the tilt of the Earth. Having different latitudes also play a role in that, as latitudes are used to measure the distances between places on earth(together with longitude) receiving different amounts of solar energy also leads to having different atmospheric circulation. Making some places have more heat, while other places have lesser heat energies. Logically, the areas with higher presence of solar energy are going to be hotter than places with lesser presence of solar energy.
These pairs of forces are known as ____________-reaction pairs because one pushes against the other with an equal but opposite force.
Solar radiation bounces off of a polar ice cap, then goes into the atmosphere where it remains trapped. Which
statement best describes this situation?
The radiation is absorbed by the ice and then reflected by the atmosphere.
O The radiation is reflected by the ice and then absorbed by the atmosphere.
O The radiation is absorbed by the ice and atmosphere.
O The radiation is reflected by the ice and atmosphere.
Answer:
b
Explanation:
The radiation is reflected by the ice and then absorbed by the atmosphere.
Answer:
B
Explanation:
I got it right on my assignment
The fragments collided with Jupiter's atmosphere at a speed of about 60,000 m/s
(about 132,000 mph). The biggest fragment had a mass of 189,000,000,000 kg, or 1.39
x 10" kg. How much energy was released by the impact?
Answer: E = 5.004*10^(20) joules
Explanation:
We do not have a lot of information about the impact, so we can assume that the energy released on the impact was the kinetic energy of the large fragment.
Remember that the kinetic energy of an object of mass M that moves at a velocity V is:
K = (M/2)*V^2
in this case, we know that the speed (that is equivalent to the velocity) is:
V = 60,000 m/s
And the mass is:
M = 1.39*10^(11) kg
Then the kinetic energy of the large fragment was:
K = (1.39*10^(11) kg/2)*( 60,000 m/s)^2 = 5.004*10^(20) joules.
Then we could conclude that the energy released on the impact was:
E = 5.004*10^(20) joules
Since coal forms from tropical swamp plants that were buried and compacted millions of years ago, how would you explain the presence of coal in Antarctica?
Answer:
hello and thank you
Explanation:
The existence of coal beds in Antarctica is evidence that the region once experienced significant warming and was home to vast amounts of plant life.
What is Continental Drift Theory?One of the earliest hypotheses put up by geologists for how continents might migrate through time is called continental drift. The science of plate tectonics has now supplanted the theory of continental drift.
The scientist Alfred Wegener is most closely connected with the concept of continental drift. Wegener wrote a paper outlining his notion that the continents were "drifting" across the Earth, occasionally crashing through oceans and into one another, in the early 20th century. He referred to it as continental drift.
What is known about Antarctica's changing climate is that it didn't begin to cool until roughly 34 million years ago, when the continent was severed from the others which supports Continental Drift theory.
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A car is driving at a speed of 50 m/s. After 6 seconds he notices a wreck up ahead and slows down to 20 m/s. What is his acceleration
Answer:
the acceleration of the car is -5 m/s².
Explanation:
Given;
initial velocity of the car, u = 50 m/s
time of motion, t = 6 s
final velocity of the car, v = 20 m/s
The acceleration of the car is calculated as;
[tex]a = \frac{v-u}{t} \\\\a = \frac{20-50}{6} \\\\a = - 5 \ m/s^2[/tex]
Therefore, the acceleration of the car is -5 m/s².
_____ type of components is affected by the intensity of light.
Answer:
Explanation:
Some of the factors affecting intensity are: The energetic intensity of the source (the initial volume). The distance from the source (the volume at any point along the path). Any modifying elements in the light path (air, clouds, filters, reflectors, etc.) The factors affecting the intensity of light are diffraction.
Light has three properties: Wavelength, speed, and amplitude. The wavelength determines the type of light (color, etc.). Speed is determined by whether light passes through a vacuum or some material. The more photons emitted per unit time, the greater the intensity of the light. Directly, it is the power that determines the brightness of a bulb. That is why light bulbs have a power rating, i.e. a 60W bulb is enough to light a typical bedroom. But power is determined by the current and voltage which, in turn, is determined by the current.
How far can A car traveling A 25.0 km/hour travel in two hours
Answer:
50km
Explanation:
25*2.............
how can changing the kinetic energy of an object cause energy to be transferred to or from the object
Kinetic Energy. Energy is transferred from one object to another when a reaction takes place. Energy comes in many forms and can be transferred from one object to another as heat, light, or motion, to name a few. For the blue ball to move to the position of the green ball, energy must be given to the blue ball.
What is the answer to anything and everything HELP I GIVE BRAINIEST AND LOTS O POINTS
How many different atoms are there in a compound?
Answer:
2 or more atoms
Explanation:
yes yes yes yes yes yes yes yes
Answer:
Two or more
Explanation:
It's mostly two but unique structures might compose of more than 2
Kerry drops her iPhone accidently as she is standing on an overview. How fast is the iPhone moving after 3s?
Answer:
really fast? xP
Explanation:
what is latent heat energy's definiton
Now that you have learned about measuring electricity, complete and submit the following projects Complete the following: 1. Examine at least three different batteries at home or at a store, each with a different voltage. Download the battery chart and fill it in showing the type of battery (alkaline, NiCd, etc), the voltage, the size, and the use for which each battery is designed. Why do you think they are different in size and voltage? 2. Examine two items that use more than one battery, such as a flashlight, a 2-way radio, or a battery operated toy. Look at the arrangement of the batteries in the item. Are they connected in series? For each item, state the number and type of batteries, the voltage of each battery and the total voltage produced. Click on the Activity Buttons below to open the Battery Chart and Measuring Electricity Assignment. Activity Sp C С
Answer:
in the attached documents are the answers i made a 100 on it
Explanation:
Answer:
I fo
Explanation:
I dont see the attachment
SOMEONE HELP ME PLEASE!!!!!
Answer:
I think it would be the 3rd or 4th one.
The SI unit for acceleration is_____
a m/s.
b m/s 2
c m/s2
d none of the above
Which two organisms in the Domain Eukarya can make their own food?
Answer:
Plantae. Also called the Kingdom Metaphyta, the Kingdom Plantae consists of all multicellular, eukaryotic, and photosynthetic organisms on the planet. Being photosynthetic, these organisms are autotrophs and can make their food using the energy from the sun.
a plane travels 400km in 3 hours. what is its speed?
Which wave property is related to how loud or soft a sound is?
Answer:Aplitude
Explanation:
a p e x
The specific heat of water is 4.18 J/gºC. How many Joules of
heat are released to lower the temperature of 150 g water
from 100 °C to 5°C?
Under constant acceleration, the average velocity of a particle is half the sum of its initial and final
velocities. Is this still true if the acceleration is not constant? Explain.
Answer:
It is not still true that the average velocity of the particle is equal to half the sum of the initial and final velocities when the acceleration of the particle is not constant
Explanation:
The motion of a particle under constant acceleration, 'a', is be given by the following kinematic equations;
v² = u² + 2·a·s
v = u + a·t
Where;
v = The final velocity of the particle
u = The initial velocity of the particle
a = The acceleration of the particle
s = The distance through which the particle travels
t = The time of motion of the particle
By simplifying the above equation, we have;
v² - u² = 2·a·s
(v² - u²)/(2·a) = s
(v - u) × (v + u)/(2 × a) = s
((v - u)/a) × ((v + u)/2) = s
From v = u + a·t, we have;
t = (v - u)/a
∴ ((v - u)/a) × ((v + u)/2) = t × ((v + u)/2) = s
∴ ((v + u)/2) = s/t
The average velocity = (Total distance traveled by the particle) ÷ (The time of travel of the particle)
∴ The average velocity = s/t = ((v + u)/2) = Half the sum of the initial and final velocity
However, it is not still true that the average velocity of the particle is equal to half the sum of the initial and final velocities when the acceleration of the particle, 'a', is not constant, as the velocity time graph is no longer a straight line graph and the distance traveled by the particle, 's', which is the area under the velocity time graph, 'A', (given by the sum of area of the triangle and the rectangle given by the area under straight line graph for constant velocity) cannot be given directly by the product of the time and the average velocity.
Help now WILL MARK BRAINLEST
The diagram below shows a race car traveling around a racetrack at a constant speed of 150 km/hr.
B
According to the above information and diagram, at which points (if any) is the velocity of the car the same?
O Points A and B
O Points A and C
O Points B and C
O The velocity is not the same at any of the points.
Answer:
point a and c
Explanation:
point a and c
According to the above information and diagram, at Points A and C the velocity of the car is the same, so option B is correct.
What is velocity?When anything is moving, its velocity tells us how quickly that something's location is changing from a certain vantage point and as measured by a particular unit of time.
If a point moves along a path and covers a certain distance in a predetermined amount of time, its average speed over that period of time is equal to the distance covered divided by the travel time. A train traveling 100 kilometers in two hours, for instance, is doing it at an average speed of 50 km/h.
As the car accelerates from point A and decelerate at point B and then again accelerate from point B and gain the highest velocity at point C therefore, the velocity of the car is the same at point A and C.
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