Answer:
1. Following the recoil principle, rockets use combustion (a controlled explosion) to work against earth's gravitational attraction.
2. A force is a push or a pull that acts upon an object as a results of its interaction with another object. ... These two forces are called action and reaction forces and are the subject of Newton's third law of motion. Formally stated, Newton's third law is: For every action, there is an equal and opposite reaction.
(via physicsclassroom.com)
3. The combustion throws out material with very high momentum and is, physically speaking, the action. In reaction to that that, the rocket moves away from it (upward when in starts and has the action underneath it)
4. To show the world that commercial manned space missions are safely possible. Some may also like the fact that the US can now do, or rather order, manned flights into space without the help of the russian space agency (Roskosmos).
5. Robert Behnken and Douglas Hurley
6. The international space station (ISS)
7. Yes, Stage 1 of the rocket landed on the drone ship. The crew opened the hatch to enter the space station after 21 hours and 39 minutes after the launch from Cape Canaveral.
8. To have private contractors such as SpaceX actively in the field, there are now more interest groups that participate in space travel. And they can interact with other companies as well.
Also, due to Musks dream and efforts of SpaceX, space travel seems to get a lot cheaper.
That might indeed open the way back to the moon and further to the Mars for human space flight.
Governments such as the US planned on such things for decades, but changed plans ever since, and routinely changed leadership and the opinion on what's important.
Now Spaceflights can become less politically motivated and more commercially. That seems to be a more stable way over long periods of time.
(wrote most of it for you myself, even tough I'm not a native English speaker. would really appreciate the brainliest if you appreciate the work)
Answer:
yhgfty
Explanation:
cdfgv
What’s the resistance of the circuit
Why is acceleration due to gravity low in the space?
Answer:
Explanation:
actually , the acceleration due to gravity depends on the distance from it's center of the earth.
when the distance from the earth increases , the acceleration due to gravity decreases as a result . The value of gravity in space is zero.
A sphere with radius 10 cm is filled with a uniform charge distribution. The magnitude of the electric field at a point 5 cm from the center of the sphere is 3014 N/coul. Use this fact to calculate the charge density rho inside the sphere.
Answer:15 cm
Explanation: u had 10cm. them u had another 5cm
A man travels a distance if 1.5 m towards east ,then 2m towards south and 4.5 m towards east.
i) What is the total distance travelled
ii) what is the result in displacement
Answer:
i) 8.0mii) 6.32mExplanation:
i) The total distance traveled will be the sum total of individual distances traveled by the man.
If the man travels a distance if 1.5 m towards east ,then 2m towards south and 4.5 m towards east, the total distance traveled will be expressed as; 1.5m+2m+4.5m
= 8.0m
ii) In order to get the man resultant displacement, we will use the Pythagoras theorem. Since the man travels a distance if 1.5 m and 4.5m towards east, the total distance taken towards east will be 6.0m and the distance traveled towards south is 2.0m. The resultant displacement of the man is expressed as;
R = [tex]\sqrt{x^{2}+y^{2} }[/tex]
Note that the eastward direction is the x-direction while the south direction is the y-direction.
x = 6.0m and y = 2.0m
[tex]R = \sqrt{6^{2}+2^{2} } \\R = \sqrt{36+4}\\ R = \sqrt{40} \\R = 6.32m[/tex]
The displacement of the man is 6.32m
some amusement parks have a ride where people are attached to a long cable, pulled back, and let go, like a pendulum. if the cable is 45.5 m long, what will the period of oscillation be?(unit=s)
Answer:
The period is [tex]T = 13.53 \ sec[/tex]
Explanation:
From the question we are told that
The length of the cable is [tex]L = 45.5 \ m[/tex]
Let take acceleration due to gravity as [tex]g = 9.8 \ m/s^2[/tex]
Now the period of the oscillation is mathematically represented as
[tex]T = 2 \pi \sqrt{\frac{L}{g} }[/tex]
substituting values
[tex]T = 2 * 3.142 \sqrt{\frac{45.5}{9.8} }[/tex]
[tex]T = 13.53 \ sec[/tex]
Answer: 13.53
Explanation:
how do you calculate the net force, i need a full explanation PLEASE
Answer:
Once you have drawn the free-body diagram, you can use vector addition to find the net force acting on the object. We will consider three cases as we explore this idea:
Case 1: All forces lie on the same line.
If all of the forces lie on the same line (pointing left and right only, or up and down only, for example), determining the net force is as straightforward as adding the magnitudes of the forces in the positive direction, and subtracting off the magnitudes of the forces in the negative direction. (If two forces are equal and opposite, as is the case with the book resting on the table, the net force = 0)
Example: Consider a 1-kg ball falling due to gravity, experiencing an air resistance force of 5 N. There is a downward force on it due to gravity of 1 kg × 9.8 m/s2 = 9.8 N, and an upward force of 5 N. If we use the convention that up is positive, then the net force is 5 N - 9.8 N = -4.8 N, indicating a net force of 4.8 N in the downward direction.
Case 2: All forces lie on perpendicular axes and add to 0 along one axis.
In this case, due to forces adding to 0 in one direction, we only need to focus on the perpendicular direction when determining the net force. (Though knowledge that the forces in the first direction add to 0 can sometimes give us information about the forces in the perpendicular direction, such as when determining frictional forces in terms of the normal force magnitude.)
Example: A 0.25-kg toy car is pushed across the floor with a 3-N force acting to the right. A 2-N force of friction acts to oppose this motion. Note that gravity also acts downward on this car with a force of 0.25 kg × 9.8 m/s2= 2.45 N, and a normal force acts upward, also with 2.45 N. (How do we know this? Because there is no change in motion in the vertical direction as the car is pushed across the floor, hence the net force in the vertical direction must be 0.) This makes everything simplify to the one-dimensional case because the only forces that don’t cancel out are all along one direction. The net force on the car is then 3 N - 2 N = 1 N to the right.
Case 3: All forces are not confined to a line and do not lie on perpendicular axes.
If we know what direction the acceleration will be in, we will choose a coordinate system where that direction lies on the positive x-axis or the positive y-axis. From there, we break each force vector into x- and y-components. Since motion in one direction is constant, the sum of the forces in that direction must be 0. The forces in the other direction are then the only contributors to the net force and this case has reduced to Case 2.
If we do not know what direction the acceleration will be in, we can choose any Cartesian coordinate system, though it is usually most convenient to choose one in which one or more of the forces lie on an axis. Break each force vector into x- and y-components. Determine the net force in the x direction and the net force in the y direction separately. The result gives the x- and y-coordinates of the net force.
Example: A 0.25-kg car rolls without friction down a 30-degree incline due to gravity.
We will use a coordinate system aligned with the ramp as shown. The free-body diagram consists of gravity acting straight down and the normal force acting perpendicular to the surface.
We must break the gravitational force in to x- and y-components, which gives:
F_{gx} = F_g\sin(\theta)\\ F_{gy} = F_g\cos(\theta)F
gx
=F
g
sin(θ)
F
gy
=F
g
cos(θ)
Since motion in the y direction is constant, we know that the net force in the y direction must be 0:
F_N - F_{gy} = 0F
N
−F
gy
=0
(Note: This equation allows us to determine the magnitude of the normal force.)
In the x direction, the only force is Fgx, hence:
F_{net} = F_{gx} = F_g\sin(\theta) = mg\sin(\theta) = 0.25\times9.8\times\sin(30) = 1.23 \text{ N}F
net
=F
gx
=F
g
sin(θ)=mgsin(θ)=0.25×9.8×sin(30)=1.23 N
A thermometer measures the temperature of air and uses units like?
Answer:
A thermometer is an instrument that measures temperature.
Explanation:
It can measure the temperature of a solid such as food, a liquid such as water, or a gas such as air.
explain the application of pascals law
Answer:
pplications of Pascal’s Law
Hydraulic Lift: The image you saw at the beginning of this article is a simple line diagram of a hydraulic lift. This is...
The construction is such that a narrow cylinder (in this case A) is connected to a wider cylinder (in this case B). They...
Pressure applied at piston A is transmitted equally to piston B without diminishing, on use of an incompressible fluid.
Explanation:
The equation y = 5 Sin (3x - 4t), where
y is in millimeters, x is in metres and t
is in seconds, represents a wave motion.
Determine the (i) frequency (ii) period
(iii) speed of the wave.
Answer:
Frequency, f = 0.63 Hz
Period, T = 1.58 s
Speed of a wave, v = 1.34 m/s
Explanation:
The equation of a wave is given by :
[tex]y = 5 \sin (3x - 4t)[/tex] ...(1)
y is in mm
x is in meters
t is in seconds
The general equation of a wave is given by :
[tex]y=A\sin(kx-\omega t)[/tex] ...(2)
(i) Compare equation (1) and (2) we get :
[tex]k=3\\\\\omega=4[/tex]
Since,
[tex]\omega=2\pi f\\\\f=\dfrac{\omega}{2\pi}\\\\f=\dfrac{4}{2\pi}\\\\f=0.63\ Hz[/tex]
(ii) Period of wave is :
[tex]T=\dfrac{1}{f}\\\\T=\dfrac{1}{0.63}\\\\T=1.58\ s[/tex]
(iii) Speed of a wave,
[tex]v=\dfrac{\omega}{k}\\\\v=\dfrac{4}{3}\\\\v=1.34\ m/s[/tex]
What fuels our Sun? Will it ever run out of that fuel?
Answer: Hydrogen and Helium. Yes the Sun will eventually run out of fuel.
Explanation: The sun burns the hydrogen, using a special chemical reaction called nuclear fusion, releasing huge amounts of energy. This hydrogen is limited however and scientists predict that the sun will run out of it in about 5 billion years.
PLEASE RATE 5 STARS AND VOTE AS BRAINLIEST:)
(^o^)(^o^)(^o^)(^o^)(^o^)(^o^)(^o^)(^o^)(^o^)(^o^)(^o^)(^o^)
Which process is the most scientifically plausible explanation for how the organisms released oxygen into Earth's atmosphere? Group of answer choices
Answer:
Photosynthesis
Explanation:
Studies about the time period of oxygen accumulation suggests that free oxygen was first produced by prokaryotic and then later by eukaryotic organisms in the ocean. These organisms carried out photosynthesis more efficiently, producing oxygen as a waste product.
The organism mainly responsible for this is known as cyanobacteria, or blue-green algae. These microbes conduct photosynthesis: using sunshine, water and carbon dioxide to produce carbohydrates and, oxygen.
What term describes the tendancy of an object to resits change in motion
Answer:
Inertia
Explanation:
Newton's second law of motion states that the accelaration of an object is directly proprotional to the force acting upon it. In symbols, we can write this as
[tex]\mathbf{F}=m\mathbf{a}[/tex]
Wher F is the force acting upon the object, m is the object's mass, and a is the object's acceleration. We can multiply both sides of this equation by 1/m to get the equivalent equation
[tex]\frac{1}{m} \mathbf{F}=\mathbf{a}[/tex]
What happens when we make m higher and higher? Well, that fraction 1/m gets closer and closer to zero. The same force accelarates the object less and less as that object becomes more massive. This consequence of Newton's second law, the resistance of massive objects to changes in acceleration, is called inertia, and it's one of the main expressions of mass in classical mechanics.
A motorboat starting from rest on a lake accelerates in a straight line at a constant rate of 3.0 m s–2 for 8.0 s. How far does the boat travel during this time
Answer:
96m
Explanation:
Using SUVAT:
s=? u=0 a=3 t=8
s=ut+0.5*at^2
s=0.5*3*8^2
s=96m
The position of an object with respect to time, moving along the x-axis is given by x = b t3. Calculate the acceleration of the object if b = 3 m/s3.
Answer:
The acceleration of the object measured in [tex]\frac{m}{s^{2}}[/tex], as a function of time is equal to:
[tex]a = 18\cdot t[/tex]
Explanation:
The acceleration function is obtained by deriving position function twice:
[tex]a = \frac{dv}{dt} = \frac{d^{2}x}{dt^{2}}[/tex]
[tex]x = 3\cdot t^{3}[/tex]
[tex]v = 9 \cdot t^{2}[/tex]
[tex]a = 18\cdot t[/tex]
The acceleration of the object, measured in [tex]\frac{m}{s^{2}}[/tex], as a function of time is equal to:
[tex]a = 18\cdot t[/tex]
Carol has several test tubes of different liquids. If Carol removes heat from the liquid substances, which of the following is most likely to occur?
a The temperature of the particles will decrease and then become a gas.
b The temperature of the particles will increase and then become solid.
c The temperature of the particles will increase and then become gases.
d The temperature of the particles will decrease and take up less space.
Answer:
d
Explanation:
Ball A is negatively charged and ball B is electrically neutral. What happens to the charges of both balls when they come into contact with each other if:
(a) they are made of an electrical conductor
describe what will happen
(b) they are made of insulator
describe what will happen
Answer:
ans for A)
Ball A being negatively charged and Ball B being neutral
when they come into contact.... electrons from the ball A will transfer to ball B and since they are covered by an electrical conductor... their contact will form a joint pathway for electric charge to be transferred to another object.
Answer: i think A
Explanation:
What acceleration is produced by a force of
2000 N acting on a person of mass 80 kg?
Answer:
The acceleration of [tex]25\ m/s^2[/tex] is produced in the person.
Explanation:
We have,
Mass of a person is 80 kg
Force acting on the person is 2000 N
It is required to find the acceleration produced in the person due to force.
The force acting on the person is given by :
[tex]F=ma\\\\a=\dfrac{F}{m}\\\\a=\dfrac{2000}{80}\\\\a=25\ m/s^2[/tex]
So, the acceleration of [tex]25\ m/s^2[/tex] is produced in the person.
How does the body maintain homeostasis? Give two or more examples of how this is accomplished. Provide supporting details. Be detailed in your answer
Explanation:
-body temp: when cold, erector muscle contract, hair raise, vasoconstriction occurs, sweat production reduces, muscle shiver to enhance metabolism, and thyroid gland secret more thyroxine to enhance metabolism
-water potential balance: when we are thirsty, pituitary gland secret more ADH, kidney tubules become more permeable to water, so more water re-absorbed, less urine produced, retaining more water.
Parachutists are hurt when jumping on the moon's surface,why?
Answer:
It's all about Gravity. When parachutists jump and open the parachute, the parachute increases the air resistance due to which acceleration due to gravity decreases, thus parachutists land safely without getting hurt.
What is an example of a wave that is not mechanical and how is it different?
Answer:
light is an example of a wave that is not mechanical .
it is different as it does not need material medium for its propagation
A current flows through a 6
resistor and the potential
difference across the resistor is
15V. What current flows through
the resistor? (don't use any units,
numbers only)
Answer:
2.5 A
Explanation:
Ohms law is a physical law relating the voltage difference between two points, the electric current flowing between them, and the resistance of the path of the current. Mathematically, the law states that V = IR, where V is the voltage difference, I is the current in amperes, and R is the resistance in ohms. It is can easily be deduced from the foregoing that the voltage is directly proportional to current and the resistance is the constant of proportionality.
From ohm's law;
R= 6Ω
V= 15V
I= ???
V=IR
I= V/R
I= 15 V/6Ω
I= 2.5 A
What is the word used to describe the approach that considers how the different aspects of health
influence each other?
tach files
Answer:
It does not show mountainous regions.
Explanation:
I took the test.
Derive velocity-time relation from velocity-time graph
Explanation:
hope this helps you
.....,.......
A student builds a simple circuit and a magnet under one of the circuit wires. When the switch is closed charges flow int the circuit and the wire moves
Answer:
Magnetic field, current and motion are mutually dependent.
Explanation:
Fleming's right hand principle explains that when any two of current, magnetic field and motion are available, the third would be induced. These three variable are mutually perpendicular to one another. This principle has its application in an electric fan which induces the motion of the blades due to flow of current and magnetic field in the coil.
In the simple circuit, the interaction between the flow of charges (i.e current) and the magnetic fields of the permanent magnet induced the motion of the wire.
list all the types of energy
Answer:
See Below
Explanation:
1: Thermal Energy
2: Chemical Energy
3: Nuclear Energy
4: Electrical Energy
5: Radiant Energy
6: Light Energy
7: Motion Energy
8: Sound Energy
There are 8 types are energy that are above.
Hope this helps.
Yurem is pulling a wagon across the playground with a force of 10 N. He asks Elian a to help. She agrees and pushes the back of the wagon in the same direction with a force of 12 N. What is the net force acting on the wagon?
Answer:22N
Explanation:
Net force = F1 + F2
=12+10=22N
Both forces are applied in the same direction. So the net force 22N causes a change in the body's state of rest. When several forces act in a body, the body will move in the direction of the net force.
Answer:
22N
Explanation:
If a wave has a speed of 100 m/s and a wavelength of 20 meters, what is the frequency?
Answer:
f = 5 Hz
Explanation:
use f = speed / wavelength
f = 100 m/s / 20 m
f = 5 Hz
The distance between Neptune and the Sun is 30.06 AU. What is this distance in millions of kilometers? (One AU is about 150 million kilometers.)
A. 450 million kilometers
B. 450.9 million kilometers
C. 4,000 million kilometers
D. 4,509 million kilometers
Answer:
It will be B
Explanation:
Answer:The answer is B
What choice characterizes the behavior of a superconducting magnet as they warm up?
Become stronger
Become regular conductors
Become weaker
Temperature has no effect
Num chuveiro ligado nas posições verão e inverno, com as seguintes características: 220V – 2200W/4400W. Calcule a corrente elétrica que circula na potência menor (verão) e maior (inverno), com a mesma tensão. Dica: isole a corrente elétrica na expressão P= i x U
Explanation:
Let us assume that the question says,"In a shower connected in summer and winter positions, with the following characteristics: 220V - 2200W / 4400W. Calculate the electric current that circulates at the lowest (summer) and highest (winter) power, with the same voltage. Tip: isolate the electric current in the expression P = Ix V "
It is given that,
In a shower connected in summer and winter positions, with the following characteristics: 220 V - 2200 W / 4400 W.
It means lowest power is 2200 W and highest power is 4400 W
For lowest power,
[tex]P=VI[/tex]
I = electric current for summer
[tex]I=\dfrac{P}{V}\\\\I=\dfrac{2200}{220}\\\\I=10\ A[/tex]
For highest power,
[tex]P'=VI'[/tex]
I' = electric current for winters
[tex]I'=\dfrac{P}{V}\\\\I'=\dfrac{4400}{220}\\\\I'=20\ A[/tex]