Answers
A push gets the book moving. A pull from the table causes the notebook to stop moving. (This force is called friction.)
Related Questions
Describe the Compton Effect
Answers
13. A child throws a 6.9 kg package horizontally from a boat with a speed of 10.0 m/s. Calculate the resulting recoil velocity of the boat if assuming it was initially at rest. The mass of the child is 25 kg and that of the boat is 55 kg. (.863m/s)
Answers
Answer:
0.863 m/s
Explanation:
This is a conservation of momentum problem.
Momentum = p = mv
(6.9 kg)(10 m/s) = (25 kg + 55 Kg)(v)
69 kg·m/s = (80 kg)v
v = (69 kg·m/s)/(80 kg) = 0.863 m/s
I need help with this physics question.
Answers
Answer:
5.04 m
Explanation:
You are told that the homeowner wants to increase their fences by 34 percent meaning Original+ 34 percent. If the original is 100 percent, then the new fence size will be 134 % of the original. You are given the original which is 3.76 meters, to find new fence size 1.34 * 3.76m to get 5.0384 meters, rounded to 5.04 m.
Answer:
5.0384m
Explanation:
% increase = 100 x (Final - Initial / | initial | )
( |~~| Bars indicate absolute value since you can't have a negative height)
what is the acceleration of a 10 kg mass pushed by a 5 N force
Answers
Answer:
The formula is a = F m so in this case a = 5 10 = 0.5 m s 2
Explanation:
The is the sac-like structure that holds the testes.
Answers
Answer:
Scrotum
Explanation:
Answer: Scrotum
Explanation: edge
What is Moral subjectivism?
Answers
Answer:
What Is Moral Subjectivism? Moral subjectivism is based on an individual person's perspective of what is right or wrong. An individual can decide for themselves that they approve or disapprove of a certain behavior, and that is what determines if the behavior is right or wrong.
The resistance RT of a platinum varies with temperature T(°C), as measured on the constant-volume gas thermometer according to the equation RT = Ro(1+AT+BT^2). Where A = 3.8×10^-3°C^-1 and B = -5.6×10^-7°C^-2. Calculate the temperature that would be on indicated on a platinum thermometer, when the gas scale reads 200°C.
Answers
The resistance indicated by the platinum thermometer at 200°C is 1.648 times the reference resistance Ro at 0°C.
The given equation is RT = Ro(1+AT+BT²), where A = 3.8×10⁻³°C⁻¹ and B = -5.6×10⁻⁷°C⁻². To determine the temperature that would be indicated on a platinum thermometer when the gas scale reads 200°C, we will have to use the given formula. RT = Ro(1+AT+BT²) .....(i)We know that the gas scale reads 200°C. Therefore, we can substitute T = 200°C in equation (i).RT = Ro (1 + A × 200 + B × 200²) = Ro (1 + 0.76 - 0.112) = Ro (1.648)Thus, the resistance that the platinum thermometer would indicate is 1.648 times the reference resistance Ro at 0°C. This is the solution to the problem.In summary, The given equation is RT = Ro(1+AT+BT²), where A = 3.8×10⁻³°C⁻¹ and B = -5.6×10⁻⁷°C⁻². To determine the temperature that would be indicated on a platinum thermometer when the gas scale reads 200°C, we substituted T = 200°C in equation (i) to get RT = Ro (1 + A × 200 + B × 200²) = Ro (1 + 0.76 - 0.112) = Ro (1.648).For more questions on thermometer
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If an atom of oxygen has an atomic number of eight that means...…
E. there are 8 protons
F. there are 8 neutrons
G. it weighs 8 amu
H. it is in group 8
Answers
Given an average cell is ten times the mass of a bacterium. The mass of a bacterium is 10-15 kg. And a person's mass is 65 kg.
Answers
Given the mass of the cell is 1 * 10⁻¹⁴ kg, the number of cells in the 65 kg person is 6.5 * 10¹⁵ cells.
What is the number of cells in a person weighing 65 kg?The number of cells in a human is calculated as follows:
The mass of an average cell is ten times the mass of a bacterium.
The mass of a bacterium = 1 * 10⁻¹⁵ kg
mass of an average cell = 10 * 1 * 10⁻¹⁵ kg = 1 * 10⁻¹⁴ kg
Number of cells = mass of person/mass of cell
Number of cells = 65 kg/1 * 10⁻¹⁴ kg
Number of cells = 6.5 * 10¹⁵ cells.
In conclusion, the number of cells is obtained by dividing the mass of the person by the mass of a average cell.
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Note that the complete question is given below:
Assuming the mass of an average cell is ten times the mass of a bacterium (which is 10⁻¹⁵ kg): Calculate the number of cells in a human assuming the mass of the person is 10² kg.
For these questions, answer all parts of the question completely. Use complete
sentences.
4. Imagine that you have decided to try out a new kind of food that your friend
has made for you. You pick it up and take a bite, and it tastes awful. You are
wondering if you should tell your friend what you really think. Give an example of
how each of these parts of the brain would be involved in your experience:
a. Hindbrain (5 points)
b. Midbrain (5 points)
c. Forebrain (5 points)
Answers
Examples of how the parts of the brain would be involved in the experience of tasting the food and seeing it was awful include:
Hindbrain - initiating the digestive responseMidbrain - processing the sensory information Forebrain - deciding how to respondHow would the parts of the brain react ?The hindbrain, which includes the cerebellum and brainstem, is responsible for basic bodily functions such as breathing, heart rate, and digestion. In the scenario of trying a new food and finding it unpleasant, the hindbrain would play a role in initiating the digestive response to the food.
The midbrain is involved in the processing of sensory information, including auditory and visual stimuli. In the scenario of trying a new food and finding it unpleasant, the midbrain would be responsible for processing the sensory information related to taste and smell.
The forebrain is responsible for more complex cognitive processes, including decision-making and problem-solving. In the scenario of trying a new food and finding it unpleasant, the forebrain would be involved in deciding how to respond to the situation.
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which of the following describes your ability to identify the sound of a musical instrument you have heard before
psychology
Answers
Answer: Recognition.
Explanation:
I'm pretty sure this is right !
what concept in the video of the Big Bang Theory show which demonstrated operant conditioning that is incorrect?
Answers
Answer:
getting chocolate is a positive reinforcement
Explanation:
Two objects are held close together. When they are released, they move toward one another. Which conclusion is supported by this evidence? O The objects are both positively charged. O The objects are both negatively charged. O The objects have no charge. O The objects have opposite charges. Mark this and return Save and Exit 02:48:18 Next Submit
Answers
Two objects are held close together. When they are released, they move toward one another. The conclusion is supported by this evidence is the objects have opposite charges.
An electric charge is a physical property that causes matter to experience a force when in close proximity to other electrically charged matter. There are two types of electric charges: positive and negative. Protons, which are positively charged, and electrons, which are negatively charged, are subatomic particles that make up matter.
In general, the protons and neutrons in the nucleus of an atom have a net positive charge, while electrons, which orbit the nucleus, have a net negative charge. The charges of these subatomic particles are indicated by the symbols "p" for proton, "n" for neutron, and "e" for electron.
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Complete this concept map about types of waves.
Answers
Answer:
The answer is within the picture.
Explanation:
A fishing boat leaves a marina with a constant speed of 3.4 m/s. A speedboat leaves the marina 12 s later with an initial speed of 2.8 m/s and an acceleration of 1.7 m/s2. Let the time the speedboat leaves the marina be t = 0 and let the direction of travel of both boats be the positive x direction.
Write position-time equations for fishing boat.
Express your answer in terms of t .
When does the speedboat catch up with the fishing boat?
Answers
(a) The position-time equations for fishing boat is x = 3.4t + 40.8
(b) The time taken for the speedboat to catch up with the fishing boat is 7.1 seconds.
Position-time equations for fishing boat
The position-time equations for fishing boat will be obtained by applying the principle of relative velocity as follows;
Let the time when the speedboat catches up = t
let the total time spent by fishing boat = t + 12
Distance traveled by the fishingx = 3.4(t + 12)
x = 3.4t + 40.8
Distance between between the fishing boat and speed boatfishing boat is moving at a constant speed = 3.4 m/s
speed boat started moving 12 seconds later,
distance between the boats = 3.4 m/s x 12 s = 40.8 m
final velocity of the speedboatv = u + at
v = 2.8 + 1.7t
set up the following equation to determine the time when the two boats meet.
vt - x = 40.8
t(2.8 + 1.7t) - (3.4t + 40.8) = 40.8
2.8t + 1.7t² - 3.4t - 40.8 = 40.8
1.7t² - 0.6t - 81.6 = 0
solve the quadratic equation using formula method as shown below;
a = 1.7, b = -0.6, c = -81.6
t = 7.1 seconds
Thus, the time taken for the speedboat to catch up with the fishing boat is 7.1 seconds.
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An objects motion changes
Answers
Answer:
uh finish the question please lol.
A 1600 kg sedan goes through a wide intersection traveling from north to south when it is hit by a 2300 kg SUV traveling from east to west. The two cars become enmeshed due to the impact and slide as one thereafter. On-the-scene measurements show that the coefficient of kinetic friction between the tires of these cars and the pavement is 0.75, and the cars slide to a halt at a point 5.54 m west and 6.19 m south of the impact point. How fast was sedan traveling just before the collision? How fast was SUV traveling just before the collision?
Answers
Answer:
Explanation:
momentum of sedan of 1600 kg = 1600x v , where v is its velocity
momentum of suv of 2300 kg = 2300 x u where u is its velocity .
force of friction = ( 1600 + 2300 ) x 9.8 x .75 ( fiction = μ mg )
= 28665 N
distance by which friction acted = √ (5.54² + 6.19²)
= 8.3 m
work done by friction
= 28665 x 8.3
= 237919.5 J
Total kinetic energy of cars = work done by friction
1/2 x 1600 x v² + 1/2 x 2300 u² = 237919.5
16 v² + 23 u² = 4758.4
1600 x v / 2300 u = 6.19 / 5.54
v / u = 1.6
v = 1.6 u
putting this equation in fist equation
40.96 u² + 23 u² = 4758.4
= 63.96 u² = 4758.4
u² = 74.4
u = 8.62 m /s
v = 13.8 m /s
9) What will happen to the period of a pendulum if we change the rope of a pendulum with another which is four times with the initial? B. halved A. double C. tripled D increase four times .
Answers
Double
Explanation:
Since the period T of a pendulum is given by
\(T = 2\pi \sqrt{\dfrac{l}{g}}\)
By increasing the length of the pendulum by 4, the period becomes
\(T' = 2\pi \sqrt{\dfrac{4l}{g}} = 2\left(2\pi \sqrt{\dfrac{l}{g}}\right) = 2T\)
You can see that the period doubles when we increase the length by a factor of 4.
Why is the Falcon 9 rocket so important in today's space exploration world?
It's the first rocket to have been built by robots, saving money for labor costs.
Carbon fiber is used on the outside, making it much more lightweight, requiring less fuel to launch it.
It was invented with the ability to recharge itself by using solar panels.
It's a reusable rocket and has saved money by being reused over 60 times already.
Answers
The Falcon 9 rocket is so important in today's space exploration world because It's a reusable rocket and has saved money by being reused over 60 times already.
option D.
Why is the Falcon 9 rocket so important in today's space exploration world?The Falcon 9 rocket, is developed by SpaceX, and it holds a significant importance in today's space exploration world due to several key features and achievements, and some of the importance include the following;
ReusabilityCost-effectivenessAdvancements in rocket technologyPayload capacity and versatilityInnovation and competitionFrom the given options, we can conclude that the Falcon 9 rocket is so important in today's space exploration world because It's a reusable rocket and has saved money by being reused over 60 times already.
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8. In explosives, potential energy is generally
stored in the form of
a thermal energy
b. electromagnetic energy
c. nuclear energy
d. chemical energy
Answers
Answer:
In explosives,potential energy is in the stored form of chemical energy.
A tuna saw a marlin swimming toward it at 1 meter per second. To avoid the marlin, the tuna swam southwest for 6.8seconds at a constant velocity. In that time, the tuna swam 17 meters. What was the tuna's velocity?
Answers
The velocity of Tune who is swimming with the constant velocity southwest is found to be 2.5 m/s.
Explain about the term constant velocity?Velocity informs us of the rate of change of the position, or how quickly your location is altering in relation to time. Moreover, an object is considered to be moving to constant velocity if it covers its same distance every second.For the stated question:
Time taken by Tune to swam t = 6.8 seconds.
Distance covered d = 17 meters
Let the velocity of Tune be 'v'.
Then,
Velocity = distance / time
v = 17 / 6.8
v = 2.5 m/s
Thus, the velocity of the Tune who is swimming with the constant velocity southwest is found to be 2.5 m/s.
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I need help on how to start my essay on the 3 laws of motion
Answers
Answer:
for the first paragraph introduce the definition. for the second paragraph write about the first law, for the third paragraph write about the 2nd for the fourth paragraph write about the 3rd law. for the last paragraph do a brief summary of what you wrote and a conclusion about the laws.
i hope this helps a bit
Answer:
You can start off with the first law of motion (newtons first law), talk about what it is or what it does, give examples.
HELP PLEASE DUE IN 3 MINUTES!!!! 60 POINTS
Wind wears down rocks by blowing _________ them.
ice on
sand against
gently on
rocks toward
Answers
Answer:
i think rocks towards is correct answer
Answer:
It is gently on
Explanation:
I'm am not a 100 percent sure but try this o took that before
Airflow lifts a 3.6 kg bird 50 m up. How much work was done by the flow?
Answers
If airflow lifts a 3.6 kg bird 50 m up, then the work done by the airflow is 1764 joules.
Given,
Mass of the bird = 3.6 kg,displacement covered by the bird due to airflow d) = 50 m,Work done against the friction (W) =?
We know that :
Work done against the friction (W) = force × displacement
W = F × d
W = m × g x d [ Force = mass × acceleration due to gravity ]
W = 3.6 × 9.8 × 50 [ g = 10 m/s2 ]
W = 1764 joules
Hence, the work done by the airflow is 1764 joules.
A force is an influence that has the power to alter an object's motion. A force can cause an object with mass to accelerate when it changes its velocity, for as when it moves away from rest.
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round around the sun. earth. satellite is a satellite that cebits the equator with the same angalar velocity a Part Two: Match the items ander column "B" with the items under column "A" as related A B 9. Friction charges 10. Loss electrons 11. Like charges A Repel forces B. Positive charges C. Charging by rubbing D. Attracting forces E 12. Unlike charges 13. Neutral charges E. Charging by induction Part Three: Choose the correct answer from the given alternatives. 14. If Charge Ql attracts Q2 and charges Q2 repels charge Q3. Which of the following is correct their signs? A. D.- 13. The electric field strength at a point is defined by the force of A. Source charges B. Test charge C. An electron D. Proton C B 6. Orbital velocity of a satellite does not depend on: A. Mass of earth B. Mass of satellite C Radius of earth D. Acceleration due to gravity 7. When a planet moves around the sun: A the angular moment remains conserved. B. The angular speed remains constant. C. The linear momentum remains constant. D. The linear velocity remains constant. - Kepler's law of area is consequence of A. conservation energy. B. conservation of mass. C. conservation of linear momentum. D. conservation of angular momentunt. A current of 4A flows through 2011 resistors. How much power is lost in the resistor? A. 320w B. 80w C. 24w D. 60 A boy observed that a pen rubbed on his dry hair attracted a nearby neutral piece of paper cause of the attraction? A. Magnetic forces B. Nucleus forces C. Gravitational forces D. Electrostatic forces What will happen to the electric potential at a point in the field if the distance from the c Decrease by half B. Increase two times C. Increase four times D. Decrease to he distance between plates of a parallels plate capacitor is 1cm. If the electric field st at is the potential difference between the plates of the capacitor? B. 0.13/c Die C. 10J/c D. 0.013/c
Answers
The matchup are given below
9. Friction charges: Charging by rubbing (C)
10. Loss electrons: Positive charges (B)
11. Like charges: Repel forces (A)
12. Unlike charges: Attracting forces (D)
13. Neutral charges: Charging by induction (E)
14. If Charge Q1 attracts Q2 and charges Q2 repels charge Q3, the correct sign of their charges is: Unlike charges (D)
15.The electric field strength at a point is defined by the force of: Test charge (B)
16. Orbital velocity of a satellite does not depend on: Mass of earth (A)
17. When a planet moves around the sun: The angular moment remains conserved (A)
18. Kepler's law of area is a consequence of: conservation of angular moment (D)
18. If a current of 4A flows through a 2011 ohm resistor, the power lost in the resistor is: 80W (B)
20. If a boy observed that a pen rubbed on his dry hair attracted a nearby neutral piece of paper, the cause of the attraction is: Electrostatic forces (D)
21. If the distance from a point in the electric field is decreased by half, the electric potential at that point will: Increase four times (C)
22. The potential difference between the plates of a parallel plate capacitor with a distance of 1cm between plates and electric field strength of 10J/c is: 0.13V/c (B)
What are the statements about?The term "Friction charges" refers to the process of charging an object by rubbing it against another material. When two materials are rubbed together, electrons can be transferred from one material to the other, creating a static electric charge. The resulting charge on the object is referred to as "friction charges."
Therefore, in terms of Loss electrons: The term "Loss electrons" refers to a situation in which an object loses electrons and becomes positively charged. This can occur when electrons are transferred from the object to another material through a process such as friction charging or electrical discharge. When an object loses electrons, it has a surplus of positively charged particles and is said to have a positive charge.
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PLS ANSWER I NEED HELP
How is an electromagnetic wave (such as a radio wave) different from an ocean wave?
A) An electromagnetic wave cannot travel through empty space, but an ocean wave can.
B) An electromagnetic wave does not require a physical medium to travel through.
C) An electromagnetic wave is a longitudinal wave and an ocean wave is an oblong wave.
D) An electromagnetic wave travels more slowly than an ocean wave.
Answers
Answer:
mmmm im going to say B but i’m not sure
Explanation:
Electromagnetic waves can travel through air and unlike ocean waves or sound waves they do not need physical molecules for like a medium to travel
A runner starts from rest and achieves a maximum speed of 8.85 m/s.
If her acceleration is 9.67 m/s2, how long does it take her to reach that speed?
Answers
Answer:
The appropriate answer is "0.9152 seconds".
Explanation:
The given values are:
Maximum speed,
v = 8.85 m/s
Acceleration,
u = 9.67 m/s²
Now,
⇒ \(v = u+at\)
By putting the values, we get
⇒ \(8.85=0+9.67t\)
⇒ \(t=\frac{8.85}{9.67}\)
⇒ \(=0.9152 \ second\)
What is an example of working as a team
Answers
Answer:
Communicating each person's job effectively.
When the magnet falls toward the copper block, the changing flux in the copper creates eddy currents that oppose the change in flux. The resulting braking force between the magnet and the copper block always opposes the motion of the magnet, slowing it as it falls. The rate of the fall produces a rate of flux change sufficient to produce a current that provides the braking force. If the copper is cooled with liquid nitrogen, the resistivity of the copper drops dramatically. How will this affect the speed at which the magnet falls toward the copper
Answers
Answer:
The speed at which the magnet falls through the copper block will be reduced dramatically.
Explanation:
Eddy's current are loops of electrical current induced within conductors by a changing magnetic field in the conductor. Eddy's current is proportional to the the magnetic field strength, the rate of change of flux, the area of the loop, and is inversely proportional to the resistivity of the material. Eddy currents flows perpendicularly to the magnetic field, and in closed loops within conductors.
Reducing the resistivity of the copper will increase the Eddy current on the copper, which will in turn increase the opposition to the action producing the flux change (the falling magnet through the copper block). The result is that the speed at which the magnet falls through the copper block will be reduced dramatically.
A ramp is 10 m high and 20 m long. What is the IMA of the ramp?
Answers
The IMA of the ramp is 2.
How do you calculate a mechanical advantage?The force amplified by utilising a tool, mechanical device, or machine system is known as mechanical advantage. To achieve the necessary output force amplification, the gadget trades off input forces against movement. The law of the lever serves as a paradigm for this. Mechanisms are machine parts made to control forces and motion in this way. An ideal transmission system does not increase or decrease power. Consequently, the ideal machine is devoid of a power source, frictionless, and built from inflexible materials that do not flex or wear. Efficiency factors that account for deviations from the ideal are used to express how well a real system performs in comparison to the ideal.The length of the effort arm of a lever divided by the length of the resistance arm represents the optimal mechanical advantage. The IMA is typically calculated as the resistance force (Fr) divided by the effort force (Fe). IMA is also equal to the product of the load's travel distance (dr) and the distance over which the effort is applied (de).Given data :
L = 20 mH = 10 mBy using the formula,
MA = L / H
= 20 / 10
= 2
IMA = 2
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