Answer:
78.2 m/time
Explanation:
Wavelength =Speed/Frequency
Speed = 46 x 1.7 =78.2 m/time.
calculates the speed of the satellite which performs orbital motion around the earth from an altitude of 3600km?
Answer:
Using the equation for orbital speed
orbital speed= square root of GM/r
Where
G= Gravitational Constant = 6.674x10^-11m^3/kg.s^2
M= mass of The Earth=5.972x10^24 kg
r= the combined radius of The Earth and the height of the satellite above The Earth=6378km+ 3600km= 9978km converting to meters gives (1000m=1km) 9978km*1000m/1km= 9,978,000m or 9.978x10^6m
orbital speed = square root of (6.674x10^-11*5.972x10^24/9.978x10^6= 63198m/s
Someone, please help!! cant understand
Answer:
4400 N
Explanation: (c)
P= [tex]\frac{F}{A}[/tex]
F= PA
P= pressure
A= area
P=800x[tex]10^{3\\[/tex] and A= 5.5 x [tex]10^{-3}[/tex][tex]m^{2}[/tex]
Force F= 800x[tex]10^{3}[/tex]x0.0055= 4400 N
force exerted by the gas on the piston is 4400 N
help?? ....... ┐(‘～`;)┌
Answer:
(3) Both extensional as well as compressional strain is produced
Explanation:
Both extensional as well as compressional strain is produced
Strain is amount of restoration formed by a restoring force .It is formed in the direction of force applied.If the body temperature of a person is recorded as 98. 6°F, what is the person’s body temperature in °C? 37 99 209.
Answer:
37
Explanation:
Fahrenheit = ( 9 divided by 5 x Celsius) + 32
= ( 9 divided by 5 x 5)
= 5 + 32
= 37 degrees Celsius
Answer:
37 °
Explanation:
A 60 watt light bulb runs for 5 seconds. How much energy does
it use?
An object hits the ground travelling at 8 km/hr. It is brought to rest in 0.4 seconds. What is its
acceleration in m/s^2?
Explanation:
8km/hr---→2.22m/s
a=v-u/t
0-2.22/0.4
5.55m/s²
A 985 car is moving in a circular track with tangential speed of 25 m/s . The radius of the track is 2.75km 985 kg,calculate the centripetal acceleration on the car
F = mv²/r = m.a
a = v²/r
a = 25²/(2.75 x 10³)
a = 0.227 m/s²
The diagram shows a circuit with a 3-cell battery, a light bulb, and four labeled locations. Which statement describes the direction of conventional current in this circuit?
The statement that correctly describes the direction of conventional current in the circuit is : ( C ) current is directed from A to B to C to D
Conventional currentconventioanl current is simply the flow of protons from the positive terminal of the voltage source ( battery ) to the negative terminal of the battery. Also conventional current is the charge transferred in a given direction per unit time. for a conventional current the charge carrier is irrelevant.
Hence we can conclude that the direction of conventional current in the circuit is : current is directed from A to B to C to D.
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Attached below is the missing part of the question
Two cars are involved in a crash (no one was hurt in the accident). If
the total momentum is 4120 kg. M/s after the collision, what is the
total momentum before the collision?
A. 0 kg • m/s
B. 8240 kg • m/s
C. 2060 kg • m/s
D. 4120 kg • m/s
Which nuclear reaction occurs in stars?
Answer:
In a nuclear fusion reaction, the nuclei of two atoms combine to create a new atom. Most commonly, in the core of a star, two hydrogen atoms fuse to become a helium atom.
If a force of 50 newton's was applied to an object with a mass of 500 grams, what will the object's acceleration be? (hint - units!).
Answer:
100 m/s²
Explanation:
50 N / 500 g = 50 N / 0.500 kg = 100 m/s²
A metal of mass 25g and dropped into a calorimeter 200g of water initially at 20°C. The final temperature is 22°C. Compute the specific heat of the metal if the water equivalent of calorimeter is 10g.
#Help Me!!
Key words
m=massT=temperaturec=Specific heat capacity[tex]\\ \rm\hookrightarrow Q_{initial}=Q_{Final}[/tex]
[tex]\\ \rm\hookrightarrow m1c1\Delta T=m2c2\Delta T[/tex]
Clear ou ∆T[tex]\\ \rm\hookrightarrow 25c1=(200+10)(1)[/tex]
[tex]\\ \rm\hookrightarrow 25c1=210[/tex]
[tex]\\ \rm\hookrightarrow C1=210/25[/tex]
[tex]\\ \rm\hookrightarrow C1=8.4cal/g°C[/tex]
The correct answer is 8.4 J⋅kg−1⋅K−1
Explanation :
The mass of the metal and water are given.The initial temperature and final temperature are given.We need to calculate the Specific heat of metal .
We know that
Qi = Qf
Therefore ,m1c1 ΔT = m2c2ΔT
Where m1 is 25g and m2 is 200g
so , 25c1 = (200+10)(22-2)
25c1 = 420
Therefore , c1 = 210/25
c1 = 16.8J⋅kg−1⋅K−1
Hence the specific heat of metal is 16.8 J⋅kg−1⋅K−1
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physics behind cricket bat
Cricket bat uses one common law of physics
The law of conservation of linear momentumWhen a ball hits the bat with some velocity ,the cricket bat should hit with some more velocity to get greater impact velocity to move the ball somewhere .
If lightning jumps from the ground to a cloud, and the charge of the ground is positive, what is the charge of the cloud (Positive or Negative)? Why
Answer:
NEGATIVE
Explanation:
It is Negative beacause POSITIVE and NEGATIVE attract. It's just like a magnet... I think you have tried that if you put the south pole of a magnet close to another south pole of another magnet, then it REPELS right? That's because they don't attract, but if you put south and north together, then they WILL attract to each other.
Same with Positive and Negative Electrons
If the ground is Positive, and the lightning gets attracted to the cloud, that means that the cloud is NEGATIVE
Glossary: (italic words)
Repel - going away from each other
attract - coming even closer to each other
Thanks!
Electrons that have accumulated in one spot and discharged themselves create lightning. A lightning strike has a very negative source.
What is lightening?A cloud-based electrical discharge known as lightning can be seen. When there is an imbalance in the charges between one area of the cloud and another surface, this occurs.
The earth has a positive charge compared to the cloud when lightning from the cloud strikes the earth.
Electrons from the cloud are released into the ground. The air becomes extremely hot and enters a highly conductive plasma state during the discharge.
Leaders might have also formed in other portions of the same cloud where there are electron-depleted patches with a positive charge.
The earth, which has recently had a significant influx of electrons and has become negatively charged, is channeled by the plasma from the original strike.
Thus, the cloud will be negatively charged.
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What does newton’s second law describe ?
A. the tendency of moving objects to stay in motion
B. Action-reaction pairs
C.The attractive force between two objects due to their masses
B. How the amount of mass influences the amount of force needed to move an object
states that the acceleration of an object is dependent upon two variables - the net force acting upon the object and the mass of the object.
A 5 kg object has a kinetic energy of 250 J. The speed of the object is rearrange the formula KE=v^ ^ 2^ * m/2 to solve for v
[tex] \qquad\leadsto\sf{10ms^{-1}}[/tex]
Correct Question :A 5kg object has a kinetic energy of 250J. Find the speed of the object by rearranging the formula :[tex]\sf{ KE=v^2\dfrac{m}{2}}[/tex]
Solution:Kinetic energy of an object is the energy possessed by the virtue of its motion.
Kinetic energy is given by:
[tex] \quad\hookrightarrow\quad{\pmb{ \sf {KE=\dfrac{mv^2}{2} }}}[/tex]
Here, we are given that:
Mass of body is 5kgIt's kinetic energy is 250 JBy using the given formula:
[tex] \implies\quad \sf{ KE =\dfrac{mv^2}{2}}[/tex]
[tex] \implies\quad \sf{ 250 = \dfrac{5\times v^2}{2}}[/tex]
[tex] \implies\quad \sf{\dfrac{ 5}{2}\times v^2 = 250}[/tex]
[tex] \implies\quad \sf{ v^2 =250\times \dfrac{2}{5}}[/tex]
[tex] \implies\quad \sf{v^2 =\cancel{ \dfrac{500}{5}} }[/tex]
[tex] \implies\quad \sf{v^2 = 100 }[/tex]
[tex] \implies\quad \sf{ v =\sqrt{100}}[/tex]
[tex] \implies\quad \sf{v =\sqrt{10\times 10} }[/tex]
[tex] \implies\quad\underline{\underline{\pmb{ \sf{ v = 10\:ms^{-1}}}}}[/tex]
When Harley-Davidson adapted some of its motorcycles with features such as smaller hand grips, lower seats, and an easier-to-pull clutch lever, it was attempting to _______.
You buy a cup of coffee at a local coffee shop. It comes in a paper cup. The cup is too hot to hold and you let it sit on the counter for a while. Eventually the cup is cool enough to carry.
Which choice describes how heat energy transfer is related to thermal energy loss?
Answer:
Thermal energy from the cup was lost as heat to the environment thus reducing the temperature of the cup
Explanation:
Answer: Thermal energy from the cup was lost as heat to the environment thus reducing the temperature of the cup
Explanation: did workbook and got answer right
Xander drew a diagram of a candle and its reflection in a mirror as shown below.
A candle sits to the right of a concave mirror. A black line from the base of the candle to the mirror has a point between the mirror and the candle with a dot labeled Focal Point. A purple arrow runs straight from the tip of the candle flame, reflects off the mirror and continues down and left through the focal point. A green arrow runs down and left to the lower part of the mirror through the focal point, reflects off the mirror and runs left parallel with and below the black line. A small image of the mirror with its base on the black line and the tip of the flame below the black line sits to the left of the focal point and to the right of the candle itself.
How should Xander describe the reflection?
A. The reflection of the candle in the concave mirror formed an upside-down real image that is smaller than the candle.
B. The reflection of the candle in the convex mirror formed an upside-down real image that is smaller than the candle.
C. The reflection of the candle in the concave mirror formed an upside-down virtual image that is smaller than the candle.
D. The reflection of the candle in the convex mirror formed an upside-down virtual image that is smaller than the candle.
The nature of the image depends on the position of the object which is the candle in this case.
What is a concave mirror?A concave mirror is one of the types o curved mirror. We must note that the position and nature of the image is determined by the position of the object as shown on the ray diagram.
In this case the ray diagram is missing hence the question is incomplete. The nature of the image depends on the position of the object which is the candle in this case.
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Answer:
A
Explanation: Its the right answer on edge
Which shows the pieces after the magnet is cut?
N
S
N
S
ON
S
S
N
N
S
S
N
Save and Exit
Nexi
Submit
Mark this and return
Answer:
NS/NS
Explanation:
If we cut a bar of magnet in half pieces according to the question given below, then the magnet will show NS/NS that is the north-south because the smaller pieces of the magnet will become a small magnet with the same property -carrying both the poles , north pole as well as south pole.The poles will not be separated.
1 point
9. A 70 kg diver drops from a board 10 m above the water's surface.
Neglect air resistance. What is the diver's Kinetic Energy just before he hits
the water? Show work. NO work shown, NO credit. *
10.0 m
KE;= 0
PE;= mgyi
5.00 m
m
KE, = mv
PE, = 0
0
Your answer
The kinetic energy of the diver just before he hits the ground is 6860 J.
Kinetic energy can be defined as the energy of a body due to its motion.
Note: Just before the diver hits the ground, the potential energy is converted into kinetic energy.
Formula:P.E(Potential energy) = K.E(Kinetic energy)K.E = mgh..................... Equation 1Where:
m = mass of the diverh = height of the boardg = acceleration due to gravity.From the question,
Given:
m = 70 kgh = 10 mg = acceleration due to gravity.Substitute these values into equation 1
K.E = 70×10×9.8K.E = 6860 JHence, The kinetic energy of the diver just before he hits the ground is 6860 J.
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Element tounlukely have a reaction with any element or conpound
Answer:
conpound
Explanation:
Which of the following has kinetic energy?
O a compressed spring
O a stretched spring
O a spring traveling down a flight of stairs
O a spring still at the top of a flight of stairs
It would be 3: a spring descending a set of steps. As kinetic energy is the energy of motion, it must be in motion.
What is Kinetic energy?Since it is moving, it would be a spring moving down a set of steps. A stretched spring, a compressed spring, and a spring at the top of a set of steps are all in motion.
Kinetic energy is a type of power that a moving object or particle possesses.
An item accumulates kinetic energy when work, which involves the transfer of energy, is done on it by exerting a net force. A moving object or particle has kinetic energy, which depends on both its mass and its rate of motion.
Therefore, It would be 3: a spring descending a set of steps. As kinetic energy is the energy of motion, it must be in motion.
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how is this possible
Answer: I'm sorry what's wrong with your money
Explanation:
Answer: LOL YO I HAVE 5K IN GROUP FUNDS
Explanation:
In the diagram below, each arrow represents a force of equal magnitude. What type of acceleration does the box have?
nvm I'm tired
The box moves to the left side due to application of more force.
Direction of box movementThe box moves to the left direction because double force is applied on it whereas small force is applied from the left side. If the same amount of force is applied from both sides then the box will not move but due to unequal force, the box will move in the direction in which more force is applied.
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E-mail is usually a poor choice for the distribution of sensitive electronic files because __________. A. Paper copies seem more official than e-mail B. Not all computers can read e-mails correctly C. It is easy to send e-mail to the wrong person D. E-mail is saved on the server that transfers it Please select the best answer from the choices provided A B C D.
Answer: D.) e-mail is saved on the server that transfers it
Explanation:
D. E-mail is saved on the server that transfers it is the right answer
What is an email?Email (Email) is a computerized application for exchanging messages between users. The global email network enables rapid exchange of email messages. Email is an electronic version of a letter, but it has advantages in terms of topicality and flexibility.
All emails in all inboxes around the world are stored on the server. An incredible amount of data requires a huge server farm. This is a huge center with millions of computers that store and send information.
A mail server (or email server) is a computer system that sends and receives emails. Web and mail servers are often integrated on a single machine.
E-mail is usually a poor choice for the distribution of sensitive electronic files because E-mail is saved on the server that transfers it
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True or False. Wegener proposed continental drift where the continents that were once separate drifted together to form Pangaea.
Answer:
False
Explanation:
he proposed that Pangea drifted apart int what is now the continents
pleaase mark brainliest
Liquid water cannot exist for very long on the surface of mars today because.
Answer:
mars is to hot
Explanation:
Explain why in both partsthe leaf of the electroscope goes back to itsoriginal positionafter the rod is removed. Refer to rubric element b9 for guidance.
Answer:
The leaves of an electroscope will return to their original position if the electroscope is not grounded because the final condition of the electroscope is the same as it was originally.
If however if one touches the terminal of an electroscope while the scope is exposed to a source of static electricity, and then the contact with the terminal is removed before the source of static electricity is taken away, then any excess electrons will remain on the electroscope and the leaves will remain diverged.
How much force is needed to accelerate a dirt bike 15 m/s2 if the bike and rider has a mass of 65 kg?
Answer:
975 N
Explanation:
Force = acceleration • mass
Force = 15 m/s/s • 65kg
Force = 975 N
