Answer:
C
Explanation:
( I dun know how to explain it but i do know that the answer is C. Saw it in a past paper.)
A flight into space by a spacecraft where the spacecraft returns to Earth without achieving orbit is called a
a multi-orbital flight.
b par-orbital flight.
c trans-orbital flight.
d sub-orbital flight.
b. par orbital flight
may be .
Answer: the answer is D sub-orbital flight
Explanation:
i took the test and got it right.
A flight that does not reach space is still sometimes called suborbital, but is not a 'suborbital spaceflight'.
Two men pull on a 31-kg box with forces 8.3 N and 6.6 N in opposite directions.
Find the resultant acceleration of the box and the direction in which the box moves.
The resultant acceleration of the box is 0.055 m/s² in the direction of the greater force.
The given parameters:
Mass of the box, m = 31 kgTwo applied forces, = 8.3 N and 6.6 NResultant force on the boxThe resultant force on the box is calculated as follows;
[tex]F_{net} = F_1 - F_2\\\\F_{net} = 8.3 \ N - \ 6.6 \ N\\\\F_{net} = 1.7 \ N[/tex]
Resultant acceleration of the boxThe resultant acceleration of the box is calculated as follows;
[tex]F = ma\\\\a = \frac{F}{m} \\\\a = \frac{1.7}{31} \\\\a = 0.055 \ m/s^2[/tex]
Thus, the resultant acceleration of the box is 0.055 m/s² in the direction of the greater force.
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William adds two values, following the rules for using significant figures in computations he should write the sum of theses two numbers by using
Answer: the same number of decimal places as the least precise value.
Explanation:
Significant figures : The figures in a number which express the value -the magnitude of a quantity to a specific degree of accuracy is known as significant digits.
The rule apply for the addition and subtraction is :
The least precise number present after the decimal point determines the number of significant figures in the answer.
For example: 12.1 + 3.245 = 15.3 as the least precise number 12.1 has one decimal place.
Thus William should write the sum of these two numbers by using the same number of decimal places as the least precise value.
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Why does an object that is sliding across carpet slow down?.
Answer:
. Carpet has a rougher surface than the bare floor, so there are more areas for the object to have friction with the rougher surface and slow down.
Explanation:
An object that is sliding across carpet slow down because of friction acting between its rougher surface and the surface of the object.
What is friction?When two bodies come in touch with each other, friction, a sort of relative force, acts as a resistance. In other words, friction force opposes the relative motion of two bodies when they come into touch with one another.
When an object is sliding across carpet, it has to pass through a surface which is more rough compare to plane surface. So, frictional force will be greater in this case compare to plane surface. This frictional force resists the sliding of the object and the object slows down gradually.
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What is the density of a billiard ball that has a volume of 100 cm3 and a mass of 2.5 g?
Answer:
d= 0.025 g/ cm3
Explanation:
datos
d=?
v= 100cm3
m= 2.5g
formula
d= m /v
solución
d=2.5/100cm3
d= 0.025g/cm3
I need examples 2 examples of levers in your body and 1 example of what they do
Answer:
Explanation:
Examples of levers in everyday life include teeter-totters, wheelbarrows, scissors, pliers, bottle openers, mops, brooms, shovels, nutcrackers and sports equipment like baseball bats, golf clubs and hockey sticks. Even your arm can act as a lever
The first color of the visible spectrum to disappear as one dives from the surface to the deep is ______.
The first color of the visible spectrum to disappear as one dive from the surface to the deep is red, as it has the largest wavelength among all the seven colors of the visible spectrum.
What is Wavelength?It can be understood in terms of the distance between any two similar successive points across any wave for example wavelength can be calculated by measuring the distance between any two successive crests.
As given in the problem we have to find out the first color of the visible spectrum to disappear as one dives from the surface to the deep,
The longer the wavelength, the lower the frequency, resulting in lower energy that's why it gets absorbed first.
Thus, red is the first color of the visible spectrum to disappear as one dives from the surface to the deep.
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Which of these events is an example of the Doppler shift?
An electric motor is running on 120 V. The current is measured to be 2 A. How many ohms of resistance is the motor
Answer:
60 ohms
Explanation:
[tex]v = ir \\ 120 = 2i \\ i = 120 \div 2 \\ i = 60ohms[/tex]
If it is helpful pls follow
The electric motor has a potential difference of 120 V and a current of 2 A, so the resistance in the circuit is 60 Ω.
What is Resistance?Electrical resistance, which measures how a substance or equipment reduces the flow of electric current through it, is a type of electrical quantity. Ohms (Ω) units have been used to express resistance. If we use the analogy of water flowing through pipes, as the pipe gets thinner, the resistance will increase and the water flow diminishes.
A circuit's opposition to the flow of electricity is assessed by its electrical resistance.
Electrons moving through a conductor, such as with a metal wire, create an electric current. The ions in the metal may be damaged by the speeding electrons. Resistance results from this, making it harder for the current that flows.
According to the ohm's law,
[tex]V=RI[/tex]
V = 120V
I = 2A
120 = R (2)
R = 60 Ω.
Therefore, the resistance in the circuit is 60 Ω.
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The eiffel tower is 300 meters tall. Disregarding air friction, at what velocity would an object be traveling when it reaches the ground if it were dropped from the top of the tower?.
Answer:
Hope it helps you :)
Explanation in the pic above.
The velocity of the object when it reaches the ground will be 76.68 m/s.
State the second equation of motion?
The second equation of motion is given by -
S = ut + 1/2 at²
Given is the Eiffel tower which is 300 meters tall.
Height of tower [S] = 300 meters
Acceleration of object [a] = + 9.8 m/s²
Initial velocity [u] = 0 m/s
Assume that its velocity when it reaches the ground is v m/s.
Effect of air friction = Negligible
Using the third equation of motion -
v² - u² = 2aS
v² = 2gS
v² = 2 x 9.8 x 300
v² = 5880
v = √5880
v = 76.68 m/s
Therefore, the velocity of the object when it reaches the ground will be 76.68 m/s.
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Who invented the first practical incandescent light bulb?.
Answer:
Edison
Explanation:
Among other notable inventions, Edison and his assistants developed the first practical incandescent lightbulb in 1879 and a forerunner of the movie camera and projector in the late 1880s.
An aeroplane flies at 600km h on a bearing of 90 degrees at an altitude where the wind is 100 km h blowing in a solution direction. Determine the aeroplane resultant velocity by means of accurate scale drawing
Answer:
Explanation: You need to do this problem in respect to component velocities. Just use a vector and grab the magnitude using distance formula.
The components are Y=600, X=100
So the velocity vector is V> = sqrt(600^2+100^2) = 608.276253 in the direction (100, 600)
Which statement best describes what happens when oil and water are stirred together?.
Billy ran 800m in 240s. What is his speed? Round to two decimal places
Your answer
Answer:
Speed = 3.33 m/s
Explanation:
Formula:
Speed = distance / time
Here distance is 800 metres and time is 240 seconds
Using the formula:
Speed = 800 / 240
Speed = 3.33 m/s
Answer:
Speed=3.33m/s
Explanation:
[tex]Distance(d)=800m\\Time(t)=240sec\\Now,\\Speed=\frac{Distance}{Time} \\\\Speed=\frac{800}{240} \\\\Speed=3.33m/s[/tex]
If 84 J of work are exerted to pull a wagon, how much force does it take to pull the wagon 7. 0 m? Round your answer to the nearest whole number. It takes N of force to pull the wagon.
Answer:
The force required to pull a wagon if 84 J of work are exerted to pull a wagon 7m is 12 Joules.
HOW TO CALCULATE WORK DONE:
Work done can be calculated by multiplying the force applied on an object by the distance traveled. That is;
Work done = Force × distance
Force = Work done ÷ distance
According to this question, the work done is 84J and the wagon was pulled to a distance of 7 metres. The force is calculated as follows:
Force = 84J ÷ 7m
Force = 12N.
Therefore, the force required to pull a wagon if 84 J of work are exerted to pull a wagon 7m is 12 Joules.
if carbon has an atomic number of 6, how many protond and neutrons are found in the carbon-14 atom?
Answer:
3
Explanation:
the number is three because the protons have to sleep and produce soc when you do that you get 3
Answer:
eight neutrons
Explanation:
Neutral carbon-14 contains six protons, eight neutrons, and six electrons; its mass number is 14 (six protons plus eight neutrons). These two alternate forms of carbon are isotopes.
The sun's rays have a greater effect on land temperature than they have on water temperature. This can be explained partly by which of the following?
(1) Some energy from the sun is used to evaporate ocean water.
(2) Less energy is reflected by the water's surface than by the land's surface.
(3) Land materials have a higher specific heat than water has.
(4) Land Materials require more heat energy than water does to raise their temperature 1 degree Celsius.
Answer:
The answer is choice (3)
Explanation: Land materials do require more energy than water to raise their temperature by one degree, hence why water gets heated a lot easier than something like wood.
Nellie pulls on a 10kg wagon with a constant horizontal force of 30N. If there are no other horizontal forces, what is the wagon's acceleration
Answer:
The acceleration of the wagon is 3 m/s².
To calculate the acceleration of the wagon, we use the formula below.
Formula:
F = ma............. Equation 1
Where:
F = horizontal Force
m = mass of the wagon
a = acceleration of the wagon.
make a the subject of the equation
a = F/m.............. Equation 2
From the question,
Given:
F = 30 N
m = 10 kg
Substitute these values into equation 2
a = 30/10
a = 3 m/s²
Hence, the acceleration of the wagon is 3 m/s².
A truck is traveling at 80 m/s and has 12,000 J of kinetic energy. What is the truck’s mass?
Answer:
3.75 kg
Explanation:
m=2xKE / v²
A 400 kg spacecraft has a momentum of 30,000 kg m/s up. What is the velocity.
Answer:
75 - Please Give Brainliest
Explanation:
Complete the following
answer is down hera
An object has an acceleration of 30.0 m/s/s. The mass of the object is tripled while the net force of the object is constant. What will the new acceleration be?
Answer:
Inertia.
Explanation:
Goodluck!!
Answer:
the mass is 6 kilos grams
Electrolysis is a technique used to separate compounds, not mixtures. What has to happen in order to separate a compound? Is it easier or harder to separate a compound than a mixture?
Answer:
In order to predict the products of electrolysis, we first need to understand what electrolysis is and how it works. Electrolysis is a method of separating bonded elements and compounds by passing an electric current through them. It uses a direct electric current (DC) to drive an otherwise non-spontaneous chemical reaction. Electrolysis is very important commercially as a stage in the separation of elements from naturally occurring sources, such as ores, using an electrolytic cell.
The main components required to achieve electrolysis are:
An electrolyte: a substance containing free ions, which are the carriers of electric current in the electrolyte. If the ions are not mobile, as in a solid salt, then electrolysis cannot occur.
A direct current (DC) supply: provides the energy necessary to create or discharge the ions in the electrolyte. Electric current is carried by electrons in the external circuit.
Two electrodes: an electrical conductor that provides the physical interface between the electrical circuit providing the energy and the electrolyte.
The Interchange of Atoms and Ions
The key process of electrolysis is the interchange of atoms and ions by the removal or addition of electrons to the external circuit. The required products of electrolysis are in a different physical state from the electrolyte and can be removed by some physical processes.
Each electrode attracts ions that are of the opposite charge. Positively charged ions, or cations, move toward the electron-providing cathode, which is negative; negatively charged ions, or anions, move toward the positive anode. You may have noticed that this is the opposite of a galvanic cell, where the anode is negative and the cathode is positive.
At the electrodes, electrons are absorbed or released by the atoms and ions. Those atoms that gain or lose electrons become charged ions that pass into the electrolyte. Those ions that gain or lose electrons to become uncharged atoms separate from the electrolyte. The formation of uncharged atoms from ions is called discharging. The energy required to cause the ions to migrate to the electrodes, and the energy to cause the change in ionic state, is provided by the external source.
Oxidation and Reduction
Oxidation of ions or neutral molecules occurs at the anode, and reduction of ions or neutral molecules occurs at the cathode. For example, it is possible to oxidize ferrous ions to ferric ions at the anode
It is also possible to reduce ferricyanide ions to ferrocyanide ions at the cathode
2. An object of mass 20 kg is lifted to a 25 m building. How much potential energy is stored on the mass? (Take g= 10 m/s)
Explanation:
potential energy = mass × gravity force × height
=20 × 10 × 25
= 5000 joules
when the production of a good generates negative externalities, ________.
A polar bear starts at the north pole. It travels 1 km south, then 1 km east, then 1 km north to return to its starting point. This trip takes 0. 5 h. What was the bear’s average velocity?.
The average velocity of the polar bear is 2 km/h.
What is average velocity?
The average velocity of an object is the ratio of the total displacement of the object to the time of motion of the object.
Average velocity of the polar bearThe average velocity of the polar bear is calculated as follows;
[tex]v = \frac{x_2 - x_1}{t} \\\\v = \frac{1 \ km}{0.5 \ h} \\\\v = 2 \ km/h[/tex]
Thus, the average velocity of the polar bear is 2 km/h.
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How to derive the formula for centripetal acceleration.
Because r is given, we can use the second expression in the equation ac=v2r;ac=rω2 a c = v 2 r ; a c = r ω 2 to calculate the centripetal acceleration. Solution.
If a Ferrari, with an initial velocity of 10 m/s, accelerates at a rate of 50 m/s2 for 3
seconds, what will its final velocity be?
Answer:
we know that
a (acceleration)= {v (final velocity)-u (initial velocity) } / t (time)
so if we have to find v, so it will be:
at/u=v
so 50 * 10= 500
divided by 3s
so the answer is 166.67 m/s.
1. Horace runs at a speed of 4.0
m/s for a distance of 300 meters.
How much time did it take for
Horace to run 300 meters?
Answer:
75 seconds.
Explanation:
4x = 300
4x/4 = 300/4
x = 75 seconds.
yellow cab taxi charges a $1.75 flat rate in addition to $0.65 per mile. kim has no more than $10 to spend on a ride. how many miles can kim travel without exceeding his limit?
Answer:
you could go 12 miles paying $7.80 and $1.75
So in total being $9.55
