Answer: Venus
Explanation:
Like charges repel, whereas opposite charges attract. Is this true or false?
The electrostatic force between the like charges is positive and between the unlike charges is negative.
The positive value of force indicates the repulsion and the negative value of the force represent the attarction between the charges.
Thus, the like charges repel each other and unlike charges attract each other.
Hence, the given statement is true.
Answer: True
Explanation: Completed & passed test <3
From the law of universal gravitation, the following gravitational forces have been calculated.
Earth and Large Ball 0.882 N
Earth and Small Ball 0.049 N
Large Ball and Feather 2.41 10-14 N
Large Ball and Small Ball ?
____________
Use the formula for the law of universal gravitation to calculate the gravitational force between the large ball and the small ball. Assume the distance between them is 0.5 m.
The mass of the objects
Small Ball = 5.0 10-3 kg
Large Ball = 9.0 10-2 kg
Feather = 1.0 10-3 kg
The gravitational force between the large ball and the small ball is 1.2×10⁻¹³ N
How to determine the gravitational forceThe gravitational force between the large ball and the small ball can be obtained as illustrated below:
Mass of larger ball (M₁) = 9.0×10⁻² KgMass of small ball (M₂) = 5.0×10⁻³ KgDistance apart (r) = 0.5 mGravitational constant (G) = 6.67×10¯¹¹ Nm²/Kg²Gravitational force (F) =?F = GM₁M₂ / r²
F = (6.67×10¯¹¹ × 9.0×10⁻² × 5.0×10⁻³) / (0.5)²
F = 1.2×10⁻¹³ N
Thus, from the above calculation, we can conclude that the gravitational force is 1.2×10⁻¹³ N
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An m = 6 kg ball is projected with initial horizontal speed v = 60 m/s from a platform h = 80 meters high.(a) How much time does it take for the ball to reach the ground?(b) What is the ball's kinetic energy when it reaches the ground?
Given the mass of the ball, m= 6 kg, and the horizontal speed, v = 60 m/s.
Also, the height of the platform, h = 80 m
(a) To find the time required to reach the ground, t
Time can be calculated from the formula
[tex]\begin{gathered} h=\frac{1}{2}gt^2 \\ t=\sqrt[]{\frac{2h}{g}} \end{gathered}[/tex]Here, g= 9.8 m/s^2 which is the acceleration due to gravity.
Substituting the values in the above equation, we get
[tex]\begin{gathered} t=\sqrt[]{\frac{2\times80}{9.8}} \\ =4.03\text{ seconds} \end{gathered}[/tex](b) To find the Kinetic energy of the ball.
In order to find kinetic energy, first, we need to find the velocity.
The velocity at the ground, u can be obtained by the formula
[tex]u=v+gt[/tex]Substituting the values, we get
[tex]\begin{gathered} u=60+(9.8\times4.03)_{} \\ u=99.49\text{ m/s} \end{gathered}[/tex]Substituting the value of velocity in the below formula of kinetic energy, we get
[tex]\begin{gathered} KE=\frac{1}{2}mu^2 \\ =\frac{1}{2}\times6\times(99.49)^2 \\ =29694.78\text{ J} \end{gathered}[/tex]Thus, the time taken is 4.03 seconds and kinetic energy is 29694.78 J
4. What is the kinetic energy of a bike with a mass of 16 kg traveling at 4 m/s?
The kinetic energy of a 16kg bike with a velocity of 4m/s is 128 joules.
What is the kinetic energy of the bike?Kinetic energy is simply the energy a body possesses due to its motion.
Its expressed as;
K.E = 1/2 × m × v²
Where m is mass and v is velocity
Given the data in the question;
Mass m = 16kgVelocity v = 4m/sKinetic energy K.E = ?Plug the given values into the formula above and solve for K.E.
K.E = 1/2 × m × v²
K.E = 1/2 × 16kg × (4m/s)²
K.E = 8kg × 16m²/s²
K.E = 128kgm²/s²
K.E = 128J
Therefore, the kinetic energy is 128 Joules.
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Which procedure describes how the scientific method might solve a problem? Find something scientists say is true and then ask questions about it. Identify something you think is true and then set out to prove it. Identify a question, make observations, create a hypothesis, and then set up an experiment to test the hypothesis. Do an experiment and then ask questions about it.
Identify a question, make observations, create a hypothesis, and then set up an experiment to test the hypothesis.
What is hypothesis?
A hypothesis is a put forth explanation for a phenomenon (plural: hypotheses). A hypothesis must be testable according to the scientific method for it to be considered a scientific hypothesis. Scientific hypotheses are typically based on prior observations that cannot be adequately explained by the current body of knowledge. Despite the frequent confusion between the terms "hypothesis" and "theory," a scientific hypothesis differs from a scientific theory. A working hypothesis is an accepted theory that has been tentatively supported and is put up for further investigation.
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if a hammer for (mass= 0.45kg) is 1.7m high on a shelf , how much potential energy does it have ?
Given,
The mass of the hammer, m=0.45 kg
The height of the shelf, h=1.7 m
The potential energy is given by,
[tex]E_P=mgh[/tex]Where g is the acceleration due to gravity.
On substituting the known values in the above equation,
[tex]E_P=0.45\times9.8\times1.7=7.5\text{ J}[/tex]Therefore the potential energy of the hammer is 7.5 J
I need help knowing the formula and the meaning of it, and the solution.
Given,
The maximum pressure that a human body can withstand, P=1.80×10⁵ Pa
The density of the seawater, ρ=1.03×10³ kg/m³
The acceleration due to gravity, g=9.8 m/s²
The pressure on a body under the water is given by,
[tex]P=p_a+\rho gh[/tex]Where pₐ is the atmospheric pressure at the sea level and h is the safe depth that a human can dive into.
The value of the pressure at sea level is pₐ=1 atm=1.01×10⁵ Pa
On rearranging the above equation,
[tex]h=\frac{P-p_a}{\rho g}[/tex]On substituting the known values,
[tex]\begin{gathered} h=\frac{1.80\times10^5-1.01\times10^5}{1.03\times10^3\times9.80} \\ =7.8\text{ m} \end{gathered}[/tex]Therefore the maximum safe depth an average human can dive is 7.8 m
A 1780-pound car is parked on a street that makes an angle of 15° with the horizontal. Find the magnitude of the force required to keep the car from rolling down the hill.
We will determine the force required as follows:
[tex]\begin{gathered} F=(890kg\ast9.8m/s^2)sin(15)\Rightarrow F=2257.419711...N \\ \\ \Rightarrow F\approx2257.4N \end{gathered}[/tex]So, the force required is approximately 2257.4 N.
HELP! You walk 5 miles north, then turn around and walk 4 miles south. Calculate distance and displacement.
The distance and displacement are equal to 9 miles and 1 miles respectively.
What is distance?Distance can be defined as the amount of ground that is covered (travelled) by a physical object over a particular period of time and speed, irrespective of its direction, starting point or ending point.
In this scenario, the total distance covered (walked) by this person can be calculated by adding the distance he walked in the north direction to the distance he walked in the south direction as follows:
Distance = xf + x₀
Distance = 5 + 4
Distance = 9 miles.
On the other hand (conversely), the displacement would be calculated by subtracting the distance he walked in the south direction from the distance he walked in the north direction as follows:
Displacement = xf - x₀
Displacement = 5 - 4
Displacement = 1 mile.
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What would be the reaction force for the following action force: Hand hits a table.
Hand feels pain.
Hand stops moving.
Table hits hand.
Table makes a noise.
Answer:
hand feels pain
Explanation:
I think the right answer is hand feels pain.
According to Newton's third law of motion, for every action, there is an equal and opposite reaction. In the scenario you described, the action force is the hand hitting the table.
Hand feels pain: When the hand hits the table, the hand exerts a force on the table. Simultaneously, the table exerts an equal and opposite reaction force on the hand. This reaction force is responsible for the sensation of pain that the hand feels upon impact. It is essentially the force transmitted back from the table to the hand.
Hand stops moving: The reaction force from the table, acting in the opposite direction to the action force, causes the hand to stop moving. As the hand applies a force to the table, the table applies an equal and opposite force to the hand, resulting in a deceleration of the hand's motion until it comes to a stop.
Table hits hand: As mentioned earlier, the table exerts a reaction force on the hand. This reaction force acts in the opposite direction to the action force, causing the table to exert a force on the hand. Therefore, the table hitting the hand is a consequence of the reaction force resulting from the hand hitting the table.
Table makes a noise: The noise produced when the hand hits the table is not directly related to the reaction force itself. The noise is typically the result of the vibrations and movements caused by the impact between the hand and the table. These vibrations propagate through the table, air, and other surrounding objects, creating sound waves that we perceive as noise.
It's important to note that while Newton's third law states that the magnitudes of the action and reaction forces are equal, the effects they produce can be different due to variations in mass, acceleration, and other factors involved.
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Can someone please help me
With the application of resolution of vector, the net force is 197 N and the direction is 59 degree.
Resolution of ForcesResolution of forces can simply be solved by resolving to horizontal and vertical component.
In the given figure, we will resolve the forces into horizontal and vertical components.
Horizontal component
Fh = 80 cos 80 + 60 cos 30 + 70 cos 60
Fh = 13.89 + 51.96 + 35
Fh = 100.85 N
Vertical Component
Fv = 80 sin 80 + 60 sin 30 - 70 sin 60
Fv = 78.78 + 30 + 60.62
Fv = 169.4 N
Resultant force = √( Fh² + Fv²)
Resultant force = √(100.85² + 169.4²)
Resultant force = √(10170.7 + 28696.4)
Resultant force = √38867.06
Resultant force = 197.15 N
The direction will be
Tan Ф = Fv/Fh
Tan Ф = 169.4 / 100.85
Tan Ф = 1.68
Ф = [tex]tan^{-1}[/tex](1.68)
Ф = 59.23
Therefore, the magnitude of resultant force is 197.15 N and the direction is 59 degree north east
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A train accelerates at a rate of 2 Km/hr/sec for a period of 30 seconds. If its initial speed was 15 Km/hr, what will be its final speed?
a = Vf - vi / t
Where:
a = acceleration = 2 km/h/s
vf= final speed
vi= initial speed = 15 km/h
t= time = 30 sec
Isolate Vf
at = Vf- vi
at + vi = vf
Replacing:
vf = 2 km/h/s * 30s + 15 km/h
vf = 60 km/h + 15 km/h
Vf= 75 km/h
Motion can be described in terms of the speed, position, velocity, and acceleration of an object. How do these quantities relate to one another?
Speed is defined as a change in position over time. Position's derivative is velocity, and velocity's derivative is acceleration.
What is the relation between speed, position, velocity , acceleration?The speed equation is as simple as distance divided by time. We can define Speed as the rate at which an object's position changes in any direction.S = d/t
The direction is also indicated by the position function.In these problems, you're usually given a position equation of the form " x=" or " s (t) = s(t)= s(t)=", which tells you how far an object is from a given reference point.v = v 0 + a t
The velocity of something is the rate at which it moves in a specific direction.Although speed and velocity are frequently used interchangeably, they are distinct concepts in physics. The equation,v = s/t
represents velocity (v) as a vector quantity that measures displacement (or change in position, s) over time (t). A point or object moving in a straight line is accelerated if it accelerates or decelerates. Even if the speed is constant, motion on a circle is accelerated because the direction is constantly changing.a = (v - v0) / t = Δv / t
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How long (in years) can a battery that can supply 8.30e4 J run a pocket calculator that consumes energy at the rate of 1.10e-3 W?
Answer:
1 J = 1 W-sec
8.30E4 J / 1.10E-3 J/s = 7.58E7 sec
1 year = 365 d * 24 h/d * 3600 sec/hr = 3.15E7 sec
T = 7.58E7 sec / 3.15E7 sec / yr = 2.40 yrs
QT= 160 micro-Coulombs In scientific notation, what is that charge in just Coulombs?
We are given the following quantity:
[tex]Q=160\text{ micro-Coulomb}[/tex]Let's remember that in scientific notation the term "Micro" refers to ten to the minus 6, therefore, this is equivalent to:
[tex]Q=160\times10^{-6}C[/tex]We can convert this into standard notation by multiplying by the ten to the minus six:
[tex]Q=0.00016C[/tex]Therefore, the charge is 0.00016 Coulomb.
Can you please help me with my first lap question
Explanation:
A charge is a scalar quantity associated with every material. when we say a body or an object is charged then it means that a body or an object gained a positive charge or negative charge.
A conductor is a metal that contains a lot of electrons in it.
A dark knob or a ground is the source or sink where any charge is dumped.
(1)
when there is a negative charge on an object that will be spread over the surface by the Coulomb force.
so (c) spread out over a large area on the object.
(2)
both the positive and negative charges move to the conductor and exit the conductor.
(3)
(b) a person can not be shocked if they have a neutral charge.
All options have been defined.
abigal drives her car with a constant speed of 32 miles per hour . how far can she travel in 1 hour?
Abigail drives her car with a constant speed of 32 miles per hour . How far can she travel in 1 hour?
Abigail is driving 32 miles an hour. This means she goes 32 miles in 1 hour.
Which object has less mass but greater volume that a soccer ball ?A) smart phone B) a box of tissue C)a filled ballD) an empty balloon
D) An empty ballon have a greater volume and less mass than a soccer ball.
Danny takes his dog to the local dog park every morning, as well (dog-walking is verypopular in this area).He walks with his dog 5 blocks east, 5 blocks north, and 5 west in order to get to the park.If each block is 56 meters, what distance did Danny travel in meters?Answer:m
Given:
Danny takes his dogs to the park.
He walks with his dog 5 blocks east, 5 blocks north, and 5 west to get to the park.
Each block is 56 m.
To find:
The total distance covered by Danny
Explanation:
The total number of blocks Danny covers is,
[tex]5+5+5=15[/tex]As the distance does not require the direction, the distance covered by Danny is,
[tex]\begin{gathered} D=15\times56 \\ =840\text{ m} \end{gathered}[/tex]Hence, the distance covered by Danny is 840 m.
A force of 200 N is exerted on an object of mass 80 kg that is located on a sheet of perfectly smooth ice. What is the acceleration of the object?
Answer:down below
Explanation: Mass of first object = 40 kg
Mass of similar second object = 40 kg
Total mass = 40+40 = 80 kg
Force = 200 N
S
Force = Mass × Acceleration
200 = 80 × Acceleration
Acceleration = 200/80 = 2.5 m/s²
Three crates with various contents are pulled by a force Fpull = 3677 N across a horizontal, frictionless roller-conveyor system.
The group of boxes accelerates at 1.430 m/s? to the right. Between each adjacent pair of boxes is a force meter that measures the
magnitude of the tension in the connecting rope. Between the box of mass m₁ and the box of mass m₂, the force meter reads
F12 = 1397 N. Between the box of mass m₂ and the box of mass m3, the force meter reads F23 = 2351 N. Assume that the
ropes and force meters are massless.
m
m.
m₂
If the three crates are pulled by a force of F pull = 3677 N and an acceleration of 1.43 m / s / s, the mass of box 1 is 976.92 kg, mass of box 2 is 667.18 kg and the mass of box 3 is 927.23 kg
F = m a
F = Force
m = Mass
a = Acceleration
F = 3677 N
a = 1.43 m / s²
F = ( m1 + m2 + m3 ) a
3677 = ( m1 + m2 + m3 ) 1.43
m1 + m2 + m3 = 2571.33 → ( 1 )
The force between masses 1 and 2 is F12 = 1397 N,
F12 = m1 a
1397 = m1 * 1.43
m1 = 976.92 kg
The force between masses 2 and 3 is F23 = 2351 N.
F23 = ( m1 + m2 ) a
2351 = ( 976.92 + m2 ) 1.43
m2 = 1644.1 - 976.92
m2 = 667.18 kg
From ( 1 ),
m1 + m2 + m3 = 2571.33
976.92 + 667.18 + m3 = 2571.33
m3 = 927.23 kg
Therefore,
Mass of box 1, m1 = 976.92 kgMass of box 2, m2 = 667.18 kgMass of box 3, m3 = 927.23 kgTo know more about Force meters
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All of the following are characteristics of gravity except
Answer 1-It is a force of attraction
Answer 2-It does not change
Answer 3-It is described as the bending of space
Answer 4 - it is responsible for the planets revolving around the sun
Gravity is not described as the bending of space.
So answer 3 is the correct option among them.
What is gravity?Gravity is described as a fundamental interaction which causes mutual attraction between all things with mass or energy.
The characteristics of gravity include the following:
It is a force of attractionIt does not change it is responsible for the planets revolving around the sunGravity is also known as the universal force of attraction acting between all matter. Gravity has been found by experts to be by far the weakest known force in nature.
In conclusion, Gravity creates stars and planets by pulling together the material from which they are made.
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When a planet orbits the Sun in (nearly) a
circle...
A. gravity pushes it away from the Sun.
B. a centripetal force pulls it toward the Sun.
C. a centrifugal force pushes it away from the Sun.
D. inertia pulls it in toward the Sun.
When a planet orbits the Sun in a circle a centripetal force pulls it toward the Sun.
What is centripetal force?As an object travels in a circular path, it encounters a force known as centripetal force. .This force is directed towards the center of the circle and is essential to maintain the circular motion of the object. Without it, the object would move off in a straight line and not continue in its circular path.
What happens when a planet orbits the Sun in a circle?When an object moves in a circular path, it experiences a force known as centripetal force. This force pulls the object towards the center of the circle. For instance, when a planet orbits around the Sun, gravity acts as the centripetal force that keeps it moving along its circular path. The gravitational pull between the Sun and the planet continuously directs it towards the center of its orbit and prevents it from wandering off into space or escaping from the Sun's gravitational field.
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Two billiard balls of equal mass move at right angles and meet at the origin of an xy coordinate system. Ball A is moving upward along the y axis at vA = 1.6 m/s , and ball B is moving to the right along the x axis with speed vB = 5.1 m/s . After the collision, assumed elastic, ball B is moving along the positive y axis
a)What is the final direction of ball A?
b) What are their two speeds?
a ) The final direction of ball A is along x-axis in positive direction.
b ) The speed of ball A is 5.1 m / s and that of ball B is 1.6 m / s
In an elastic collision between two objects of same mass, the balls would move at right angles with each other. So, it is given that, the final direction of ball B is along positive Y-axis. So the final direction of ball A must be perpendicular to that direction which is positive x-axis.
The initial velocity of ball A = 1.6 m / s
The initial velocity of ball B = 5.1 m / s
In an elastic collision between two objects of same mass, the balls would exchange velocities.
Final velocity of ball A = 5.1 m / s
Final velocity of ball B = 1.6 m / s
Therefore,
a ) The final direction of ball A is along x-axis in positive direction.
b ) The speed of ball A is 5.1 m / s and that of ball B is 1.6 m / s
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platypus is considered as a bridge anim why al between birds animal between bird and mammals why
Answer:
monotremes such as the platypus often display early mammalian features that are similar to reptilian physiology and thus reflect all mammals' common evolutionary origin in reptiles. These features include the platypus's lower body temperature and lack of teats.
hope it helps you
What is the direction of the resultant. ASAPP
Answer:The direction of the resultant can be determined by finding the angle that the resultant makes with either the north-south or the east-west vector. The diagram at the right shows the angle theta (Θ) marked inside the vector addition triangle. This angle theta is the angle that the resultant makes with west.
Explanation: Because i said
A car traveling at a speed of 35.0 m/s encounters an emergency and comes to a complete stop.
How much time will it take for the car to stop if it decelerates at -4.0 m/s²?
Answer:
time will it take for the car to stop = 8.75 s
Explanation:
The formula linking final velocity(v), initial velocity(u), acceleration(a) and time(t) is
v = u + at
The final velocity is 0 m/s since the car comes to a stop
Initial velocity u = 35 m/s
a = -4 m/s²
We have to find t
Plug in values
0 = 35 + (-4)t
-4t + 35 = 0
-4t = -35
t = -35/-4 = 8.75 s
7. Which of the following is the function of the step-up transformer?A. Decreases the currentB. Decreases the transmission voltageC. Increases the currentD. Increases the transmission voltage
The function of a step-up transformer is to convert low voltage to High voltage.
D. Increases the transmission voltage
therwise express your answer in terms of g.
1. A 10 kg box with an initial velocity of 2 m/s slows to rest over a distance of 10 meters on
a level surface. What is the size of the frictional force on the box? What is the size of the
normal force on the box? What is the ratio of the frictional force to the normal force?
The size of the frictional force on the box is 2N
The size of the normal force on the box is 98.1 N
The ratio of the frictional force to the normal force is 0.02
What is the size of the frictional force acting on the body?The size of the frictional force on the box is calculated as follows:
Total force acting on the box = Net force + Normal force
Hence;
Normal force = Total force - Net force
Net force on the box = mass * acceleration
From the formula, v² = u² + 2as
where a = acceleration
v = final velocity
u = initial velocity
s = distance
a = v² - u² / 2s
v = 0 m/s
u = 2 m/s
s = 10 m
a = 0 - 2² / 2 * 10
a = - 0.2 m/s²
Net force = 10 * -0.2 m/s²
Net force = 2 N
The frictional force = Stopping Force = Net force
Hence, frictional force = 2 N.
Normal force = mass * g
Normal force = 10 * 9.81
Normal force = 98.1 N
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A 2 kg object and a 1 kg object are dropped from the same height.
Given that the inertia
masses of these objects are not the same, what hypothesis explains
why the two objects
fall with the same acceleration?
Select one:
O a. The force of gravity is the same for the 1 kg object as for the 2 kg object
O b. The force of friction is the same for the 1 kg object as for the 2 kg object.
O c. The force of gravity on the 1 kg object is twice as great as on the 2 kg object.
Od. The force of friction on the 2 kg object is twice as great as on the 1 kg object.
The first choice (A) will be accurate.
Objects weighing 1 kg and 2 kg are dropped from the same height.
Because the force of gravity is the same for both the 1 kg and the 2 kg objects, the two objects fall with the same acceleration.
What is gravity?Gravity pulls you toward the ground because all objects with mass, such as our Earth, actually bend and curve the fabric of the universe, known as spacetime. Gravity is the curvature of the earth. Gravity, also known as gravitation, is a force that exists between all physical objects in the universe. The force of gravity tends to attract any two objects or particles with nonzero mass toward each other. Gravity affects objects of all sizes, from subatomic particles to galaxy clusters. Gravity is the force that pulls objects toward the center of a planet or other entity. Gravity keeps all of the planets in orbit around the sun.To learn more about gravity, refer
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