Rana writes a summary about a mass on a spring in simple harmonic motion as it moves upward from the equilibrium position toward the maximum positive displacement. as the mass moves upward, the velocity is positive and decreasing while the acceleration is negative and decreasing. what error did rana make? the velocity should be negative, not positive. the acceleration should be positive, not negative. the velocity should be increasing, not decreasing. the acceleration should be increasing, not decreasing.

Answer:

A reference point is a place or object used for comparison to determine if something is in motion. An object is in motion if it changes position relative to a reference point.

Hope this helps:)

Answer:

E = K Q / R^2

E1 = K Q1 / R1^2 = K * (-6.39 E-9) / .4^2 = -K 39.9 E-9

E2 = K Q2 / R2^2 = K * 3.22 E-9 / .25^2 = K 51.5 E-9

Field will point to right of P since E2 (positive) stronger

E = K (E2 - E1) = 9.0 E9 * (51.5 - 39.9) E-9 = 104 N/C

The electric field at point P is 104.6 N/C.

Every place in space where a charge exists in any form has an electric attribute that can be defined as the electric field.

Here,

q₁ = -6.39 x 10⁻⁹C

q₂ = 3.22 x 10⁻⁹C

Distance from q₁ to P, d₁ = 0.4 m

Distance from q₂ to P, d₂ = 0.25 m

Electric field at P due to q₁, E₁ = k x -6.39 x 10⁻⁹/(0.4)²

E₁ = -39.9 x 10⁻⁹k N/C

Electric field at P due to q₂, E₂ = k x 3.22 x 10⁻⁹/(0.25)²

E₂ =51.52 x 10⁻⁹k N/C

Therefore, total electric field at P,

E = E₂ - E₁

E = (51.52 - 39.9) x 10⁻⁹k

E = 104.6 N/C

Hence,

The electric field at point P is 104.6 N/C.

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a) 4.9 m

b) 38.3 m/s

c) 33.4 m

The three equations are,

v = u + at

v² = u² + 2as

s = ut + ½at²

According to the question,

Let hold the y-axis in the direction of gravity.

Initial velocity 0 = 0 /,

Initial height ℎ0 = 0 , and finish height ℎ = 75.0

gravitational acceleration = 9.8 /²

a) Determine the distance traveled during the first second.

By third equation of motion

[tex]S_{0} = v_{0} t +\frac{1}{2} gt^{2}[/tex]  where [tex]v_{0}[/tex] =0

then [tex]S_{0} = \frac{gt^{2}}{2} = \frac{9.8*1^{2} }{2} = 4.9 m[/tex]

b) Determine the final velocity at which the object hits the ground

let – velocity of object, when it falling to the ground

– moment falling to the ground, and obtain from condition:

ℎ = ℎ() = 75.0

[tex]v_{f} = v_{0} +gt = gt[/tex]

[tex]h (t_{f} ) = \frac{gt^{2} }{2} = 75.0 m\\t_{f} =\sqrt{\frac{2h_{f} }{g} } \\v_{f}= gt = g \sqrt{\frac{2h_{f} }{g} } =\sqrt{2hg_{f} }= =\sqrt{2*9.8*75.0} = 38.3 m/s[/tex]

c) Determine the distance traveled during the last second of motion before hitting the ground.

From the above equation we get,

[tex]\sqrt{2*75*9.8*1} - \frac{9.8*1^{2} }{2} = 38.3 -4.9 = 33.4 m[/tex]

Therefore,

a) 4.9 m is the distance traveled during the first second.

b) 38.3 m/s is the final velocity at which the object hits the ground

c) 33.4 is the distance traveled during the last second of motion before hitting the ground.

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The North America will not be able to view the eclipse because of its location on the earth caused by the tilting of the earth.

The tilt of the Earth is what causes seasons to occur. These are the seasons in relation to the Northern Hemisphere.

The tilting of the Earth causes the difference in the amount of sun reaching each region of the earth like in the North America continent.

Thus, the North America will not be able to view the eclipse because of its location on the earth caused by the tilting of the earth.

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Answer:

0.372779 cubic meters

Explanation:

Answer:

.3104 m^3

Explanation:

1 gal (US) = .00378541178 m^3

Plant trees on places where forests have been chopped down to restore damaged ecosystems. Encourage individuals to live in a way that is environmentally friendly. Create parks to conserve the rainforests and animals. Companies that operate in environmentally friendly methods should be supported.

The liquid A is present lower in the container as compared to liquid B due to more weight.

If two liquids A and B of relative densities 0.7 and 0.4 respectively then the lower density liquid remain at the top and higher density solution which is liquid A remains lower in the container because higher density solution has more weight.

So we can conclude that the liquid A is present lower in the container as compared to liquid B due to more weight.

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An example of an object moving in projectile motion is; A basketball being thrown into a net.

Projectile motion is the motion of an object thrown or projected into the air, subject to only the acceleration of gravity.

Now, an example of an object moving in a projectile motion is throwing a basketball into a basketball net in a game. This is because the ball is thrown into the air at an angle towards the net and as such is subject to only acceleration of gravity.

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Explanation:

Methane (CH4) is 30 times stronger than carbon dioxide as an absorber of infrared radiation.

Answer:

The main reasons why CH4 has a higher vapor pressure at a given temperature when compared to CH3Cl is that CH4.

And Is 30 Times Stronger than Carbon dioxide...

Explanation:

Hope It Helps!!!

the distance is the first 80m+the second 80m she came back. So the distance is 160m. but the displacement is 0, because she came back by the direction she went.

Matter falling into a black hole arranges itself in the shape of a disk that is thick at the outer edge, thin along the inner ring.

A black hole is a region of space time where gravity is so strong that nothing or  no particles or even electromagnetic radiation such as light can escape from it.

Thus, matter falling into a black hole arranges itself in the shape of a disk that is thick at the outer edge, thin along the inner ring.

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Difference in air pressure helps us by contraction and relaxation of lungs  which forces air in and out of the lungs.

The pressure is the amount of force applied per unit area. It is represented as

Pressure p = Force/Area

The atmospheric pressure is constant. The flow of air is determined by how much above or below atmospheric pressure. The pressure inside the lungs rises or falls. The diaphragm in the lung contracts and relaxes  which forces air in and out of the lungs.

Hence, the person uses diaphragm of lungs to breathe.

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The maximum and minimum variation between the true and magnetic poles is 180 degrees and 0 degrees respectively.

The poles of the earth are the North and South poles.

The North is taken as the reference point.

The true north is a fixed point on the globe and gives the true North and South poles.

The Magnetic north is the direction that a compass needle points to as it aligns with the Earth's magnetic field and gives the magnetic North and South poles.

The maximum maximum and minimum variation between the true and magnetic poles is 180 degrees and 0 degrees respectively.

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Answer:

ohms

Explanation:

because it deal with circuit

Electric resistance is measured in Ohms.

A electric resistance can be defined as the opposition to current flow in a conductor.

From ohms law, an electric resistance can be determined using the formula below.

Formula:

Where:

Also,

Hence, Electric resistance is measured in Ohms.

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Answer:

V = 26.95 cm³

Explanation:

Density is given by the formula :

ρ = m÷V

Density = mass ÷ Volume

Given both density and mass we rearrange, substitute and solve for Volume :

Rearranging the equation to make Volume the subject :

ρ = m÷V

ρV = m

V = m÷ ρ

Now substitute :

V = 45 ÷ 1.67

V = 26.9461077844

Take 2 decimal places as the density is 2 decimal places :

V = 26.95

Units will be cm³ as it is volume

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Answer:

um d. but I am guessing this ans

Answer:

4s

Explanation:

when a bOdy rises into the air,the time it takes to reach a particular height is the same as the time it will take the body to fall from that height to the ground.

If one year consists of 365 days, this is closest to x = 3.15 × 10⁷ seconds.

Given that;

Note that; there are 24 hours in a day, 1440 minutes in a day and 86400 seconds in a days.

1 day contains 86400 seconds

365 contains x seconds

x = 365 × 86400

x = 3.15 × 10⁷ seconds

Therefore, if one year consists of 365 days, this is closest to x = 3.15 × 10⁷ seconds.

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Answer:

750

Explanation:

The kinetic formula is 1 over 2 *mass * velocity Square

A virtual and erect image is formed by concave mirror.

The focal length of the mirror is the distance between the lens and the image sensor.

It is also defined as the distance from a lens or mirror to the focal point.

It is also stated by the formula

[tex]\frac{1}{y} +\frac{1}{u} = \frac{1}{f}[/tex]

u = -50 cm and f = 0.50 m (50cm)

[tex]\frac{1}{v} +\frac{1}{-50} =\frac{1}{50}[/tex]

v= -50 cm

where - sign shows that image is virtual.

Magnification  m= [tex]\frac{v}{u}[/tex]

m = -50/50

m = 0

hence, virtual and erect image will be formed.

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Answer:

Weaker, stronger

Explanation:

hope this helped!

Answer:

[tex]\fbox {weaker, stronger}[/tex]

Explanation:

The farther you bring charged objects from each other, the weaker the electrical force between them, and the bigger the charges on the objects, the stronger the electrical force between them.

Proving

Here we need the formula for Coulomb's Law, which is :

[tex]\boxed {F = \frac{1}{4\pi\epsilon_{0}}\times\frac{q_{1}q_{2}}{r^{2}}}[/tex]

As we can see, when the distance increases, the overall force will decrease as they are inversely proportional.

Similarly, as the product of charges is directly proportional to the electrical force produced, as the charges increase, the force increases.

Answer:Because if the shape gets changed it will move faster without to much weight

Explanation:

Answer:

[tex]\fbox {D. Isobaric}[/tex]

Explanation:

The process during which pressure remains constant is called an isobaric process.

The compass is designed and developed to use a pendulous system to improve horizontality.

A compass can be defined as a scientific instrument that contains a magnetized pointer, which is used to show and indicate the following four (4) main cardinal directions:

Basically, the compass is a scientific instrument that's designed and developed to use a pendulous system to improve horizontality.

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The Acceleration of the system is 6.41 m/s².

Given,

α= 15°, m₁ = 7kg

β= 65°, m₂ = 11 kg

Let, a be the acceleration and T is the tensions at the end it's the cord.

Let, the mass m₂ be coming down along the inclined plane along the inclined surface towards downward m₂g sin β and the tension in the upward direction,

Resultant force, m₂a=m₂g sin β -T

11a=((11) ×g sin 65°) -T  ...(i)

Now, considering the motion of m₁ which moves downwards, the forces are m₁g sinα, and T both are acting downwards.

Resultant force m₁a = m₁g sin α+T

7a =7g sin 15°+T  ...(ii)

Solving both the equations by adding them,

18a=11gsin 65°+7g sin 15°-T+T

18a=11gsin 65°+7g sin 15°=115.45

a=115.45/18=6.41 m/s²

Hence, the Acceleration of the system is 6.41 m/s².

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Answer:

because the side walk is at high temperature

Answer:

designing a solution

Explanation:

after knowing & identifying a problem we start putting a solution

Answer:

The value of index of refraction(n₂) is 1.26

Explanation:

look at the attachment above