module 1 question 4


(a) How many significant figures are in the numbers 99.0 and 100.0?

99.0 :

100.0 :


(b) If the uncertainty in each number is 1, what is the percent uncertainty in each? (Give your answer to 3 significant figures.)

99.0 :

100.0 :

Answer:

birr i am not smart i d know what to do

Explanation:

pls mark as brainliest

A load of 24N must be placed on the spring balance for an extension of 8cm and the value of spring constant is calculated as 3N[tex]cm^{-1}[/tex].

The lengthened portion of an object, such as a spring, is known as its extension.

F = ke

The force in newtons is F. (N)

The “spring constant” (k) is expressed in newtons per meter (N/m).

E is the length in meters (m)

This equation is valid as long as the proportionality limit is not exceeded.

The extension for a particular spring and other elastic items is inversely proportional to the applied force. For instance, the extension doubles if the force does.

Kx = 15N

K = 15/x

= 15/5

K = 3N[tex]cm^{-1}[/tex]

dx = 8cm

The value of spring constant is = 3N[tex]cm^{-1}[/tex]

So, 3(8) = 24

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Given data

*The given length of the cable is L = 15.4 m

*The given angle is

The formula for the height is given as

Substitute the values in the above expression as

The formula for the velocity of the ball at the bottom of its swing is given as

As one proceeds down the group of halogens, one would find that the reactivity of the elements decreases. This is because the ionic radii increase down the group. And as the ionic radii increase, the nucleus of halogens exerts a weaker pull on the valance electrons.

Thus the correct answer is option d.

Answer:

m V^2 / R = G M m / R^2

M = R V^2 / G            balancing forces

V = 2 pi R / T         speed of craft

M = 4 pi^2 R^3 / (G * T^2)       substituting for V

M = 4 pi^2 * 52E21 / (6.67E-11 * 1.30E7) = 39.5 * 52 / (6.67 * 1.3) * 10^25 kg

M = 2.37E27 kg

note mass of earth = 5.98E24 kg - should check mass obtained

9.14 s long it will take a cyclist to bring a bicycle with an initial speed of 12.8 m/s to a complete stop.

Depending on whether an object is moving much faster, slower, or in a different direction, its speed may change. Examples of acceleration include a falling apple, the moon orbiting the earth and a car which has stopped at a stop sign.

Uniform acceleration, non-uniform acceleration, and average acceleration are the three different forms of accelerated motions.

a = -1.4 m/s²

v[tex]_i[/tex] = 12.8 m/s²

v[tex]_f[/tex] = 0

Δt = ?

We use formula

a = v[tex]_f[/tex] - v[tex]_i[/tex]/t

-1.4 = 0 - 12.8/t

t = 9.14 s

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If there are six water molecules, the following applies;

A molecule is the smallest particle of a specific element or compound that retains the chemical properties of that element or compound i.e. two or more atoms held together by chemical bonds.

Atoms of an element are usually shown in the chemical or molecular formula, which is a notation indicating the number of atoms of each element present in a compound.

According to this question, six water molecules are given as follows: 6H₂O

This means that there are 6 × 2 = 12 atoms of hydrogen and 6 × 1 = 6 atoms of oxygen in the 6 molecules of water.

Electrolysis is the chemical change produced by passing an electric current through a conducting solution or a molten salt.

If six molecules of water undergoes electrolysis, there would be 12 atoms of hydrogen and 6 atoms of oxygen.

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A geostationary orbit can be achieved only at an altitude very close to 35,786 kilometres (22,236 miles) and directly above the equator. This equates to an orbital speed of 3.07 kilometres per second (1.91 miles per second) and an orbital period of 1,436 minutes, one sidereal day.

25mn type of focal length was primarily used in citizen kane.

The focal lengths and lenses used by 19 notable directors are analyzed in a new video essay by Wolfcrow, starting with Orson Welles' use of 25mm for Citizen Kane and 18mm for Touch of Evil.

In Orson Welles' Citizen Kane, deep focus was frequently used to provide the audience with insight into Charles Foster Kane's thoughts or to reveal more about his life. With deep focus, the foreground, middle ground, and backdrop are all sharply in focus at once.

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Potential energy of a child at the top is 490 J.

Potential energy, U = mgh

U = potential energy

m  = mass of an object, given = 25kg

g = acceleration due to gravity, given = 9.8 m/[tex]s^{2}[/tex]

h = height of an object, given = 2 meter

Put the values in potential energy formula, U = mgh

U = mgh

U = 25 × 9.8 × 2

U = 490 J

Hence, Potential energy of a child at the top is 490 J.

Potential energy is the  type of energy, which is product of mass of an object, acceleration due to gravity and height of an object where it is placed. Its S.I. unit is joule and is represented by J.

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The velocity of the ball just before it strikes the floor is -6.18 m/s. The velocity of the ball just after it leaves the floor is 5.3 m/s. Acceleration during contact with the floor is 3280 m/s^2. The compression of the ball during its collision with the floor is -9.42*10^-4 m

(a) The ball dropped from a height 1.95 meters. The velocity just before it strikes the floor is calculated by the kinematic equation. The initial velocity is zero.

v^2 = u^2 + 2aS

v^2 = 0 + 2*-9.8*(0-1.95)

V = -sqrt(38.22) = -6.18 m/s

(b) The velocity just after it leaves the floor on its way back up.  The initial velocity is zero in this case. The ball rebounds to a height of 1.44 m.

v^2 = u^2 + 2aS

v^2 = 0 + 2*-9.8*(1.44-0)

v = sqrt(28.22) = 5.3 m/s

(c) The acceleration during contact with the floor is calculated where time is 3.50 ms.

Time in seconds = 3.5/1000 = 0.0035

a = change in velocity/time

a = (5.3 m/s - -6.18 m/s)/0.0035

a = 11.48/0.0035 = 3280 m/s^2

(d) Assuming the floor is absolutely rigid. The amount which the ball compress during its collision with the floor is given as,

v^2 = u^2 + 2aS

S = (v^2 - u^2)/2a

S = (-6.18 m/s - 0)/2*3280 m/s^2

S = -9.42*10^-4 m

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(a) Average speed is 42 km/h

(b) Average velocity is 31.21 km/h (25° S of E)

(c) Average speed and average velocity are 3.73 km/h and 0 km/h respectively.

The average speed is calculated by distance travelled divided by time. The distance travelled is 14.0 km and time taken for the trip is 20.0 min.

The time taken for the trip in hours = 20.0/60 = 0.33 hr

Average speed = 14.0/0.33 = 42 km/h

The displacement is the shortest distance between two points. For this trip the displacement is 10.3 km in the direction 25.0° south of east. Then the average velocity is calculated by change in displacement divided by time.

Average velocity = (10.3-0)/0.33 = 31.21 km/h (25° S of E)

Average speed of the total trip = (14 + 14)/7.5 = 3.73 km/h

Average velocity of the total trip = (Final position - Initial position)/time = (0 - 0)/7.5 = 0 km/h

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Answer:

Explanation:

40 km/h

A 30.0-mg oil drop carrying a charge of +3.2 μC passes undeflected through a region in which there is a uniform, constant electric field. The Electric field is mathematically given as

98 N/C

This is further explained below.

Generally, Generally, the equation for Electric field the is mathematically given as

q E=m g

Therefore

[tex]&\left(3 \times 10^{-6} \mathrm{C}\right) E=\left(30 \times 10^{-6} \mathrm{~kg}\right)\left(9.8 \mathrm{~m} / \mathrm{s}^2\right) \\[/tex]

E=98N/C

In conclusion, The force of gravity always pulls in a downward direction; hence, the electric field will be exerted in an upward direction. As a result, the value is positive.

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Coal is used to produce the majority of the electricity in the Philippines. The country's total electricity production in 2021 was 47.6% fueled by fossil fuels. Another 10.7% of the fuel was natural gas. In that year, fossil fuels accounted for about 76 percent of the nation's electricity output.

Geothermal energy is heat that rises from the earth's interior. Geothermal energy travels to the Earth's surface in the form of water or steam. Depending on its properties, geothermal energy can be utilized to produce clean electricity or be used for heating and cooling.

Due to its location along the Ring of Fire zone of Pacific volcanoes, the Philippines is among the top geothermal energy producers in the world.  On March 9, 2018, the nation turned on the 12-megawatt Maibarara Geothermal Power Plant-2 in Santo Tomas, Batangas.

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Making progress by conducting studies for research, project or article and presenting this progress to scientists represent a category that belongs to Science (Option A).

Sciences can be defined as a body of empirical knowledge whose development is based on the presentation of results from experiments in peer-reviewed publications and the generation of projects to investigate different issues of the real world.

Therefore, we can conclude that Science is a body of info based on the transference of knowledge which involves developing projects or writing scientific articles (Option A).

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The push exerted on one object when it has a collision with another object these forces are also referred to as force pairs, action forces, and reaction forces.

A collision, also known as an impact, occurs when two bodies, such as two pool cues, a golf club and a ball, a hammer and a nail, two railroad cars when joined, or a falling object and a floor, suddenly and violently collide. Collisions help physicists understand the characteristics of atomic and subatomic particles.

Collisions happen when two objects come into contact. In most cases, conservation of momentum and conservation of energy are used to solve collision-related problems. Collisions might be of two different types: Momentum is conserved in inelastic collisions, whereas it is also conserved in elastic collisions together with kinetic energy.

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The Sun’s effect on Earth change if the Sun was half its mass, the pull of gravity from the Sun would only be half as strong and is denoted as option A.

This is referred to as the universal force of attraction which acts on all matters and is dependent on some parameters such as mass etc.

The increase in mass denotes a corresponding increase in gravity and vice versa which is therefore the reason why if the Sun was half its mass, then the pull of gravity from the Sun would only be half as strong.

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Answer:

I am not understanding your question

The temperature increase of the ball is 1.63 ⁰C.

The potential energy possessed by the ball at the given height is calculated as follows;

P.E = mgh

where;

P.E = (10) x (9.8) x (150)

P.E = 14,700 J

If half of the energy of the ball is converted into heat energy, then the amount of heat capacity is calculated as follows;

Q = 0.5(P.E)

Q = 0.5 x 14,700

Q = 7,350 J

The increase in the temperature of the temperature of the ball is calculated as follows;

Q = mcΔθ

where;

Δθ = Q/mc

Δθ = (7350) / (10 x 450)

Δθ = 1.63 ⁰C

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A pot of water is heated using a camping stove. The stove supplies 115,000 J of energy to the 0.54 kg of water. Given that the specific heat.

If a plant's soil has too much water, the roots can rot, and the plant can't get enough oxygen from the soil. If there is not enough water for a plant, the nutrients it needs cannot travel through the plant. A plant cannot grow if it doesn't have healthy roots, so the proper balance of water is key when growing plants. Water level significantly affected seed germination and seedling establishment. The wet soil treatment germination rate (83%) was much higher than the waterlogged (56%) and submerged (44%) treatments.  As water emerges or evaporates between the plant's stomata, water is pushed up from the soil through the roots and into the plant. Water conveys with its minerals and nutrients from the soil that are vital for plant growth.

so we can conclude that A pot of water is heated using a camping stove. The stove supplies 115,000 J of energy to the 0.54 kg of water. Given that the specific heat.

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Answer:

By the law of conservation of energy,

m(gh + 1/2u^2)= m(1/2v^2) ---------- cancelling m from both side

=> 4.8 * 200 + 1/2 * (30)^2 = 1/2(v^2)

=> 1460 + 450 = v^2/2

=> 2410 * 2 = v^2

=> v = √4820

= 69.426m/s

Answer: 69.426 m/s

Answer:

A

Explanation:

you predicted it in the past and assumed the outcome of your result and they was a difference of 10 percent

Answer:

Take upwards as positive and downwards as negative

Explanation:

the time to reach the maximum height is 2,04s, therefore the time to come back down will be doubled that which is 4,08s

Hope this helps !!

Ashley throws a baseball into the air at 20 m/s, the time needed  to reach the maximum height is 2,04s, therefore the time to come back down will be doubled that which is 4,08s.

length measurement can be defined as an act for the identification of the length of  the object in some standard or non-standard units.

The most common units of length   are U.S. customary units and the metric units which mainly include SI and non-SI units, others are  British Imperial units are also still used in some countries.

Other units of length also include kilometres, nanometre, millimetres, centimetres, metres, decimetres  where as the Imperial and U.S. customary systems, basic unit of length is the yard.

other units are thou (1⁄1000 of an inch), line (1⁄12 of an inch), inch (25.4 mm), foot (12 inches, 0.3048 m)

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Answer:

a) V ≈ 125 m/s;  b) Δt = 13.24 s;  c) ΔS ≈ 1450 m

Explanation:

a) We have just to calculate the vector resultant.

V² = 106² + 66.2²

V² = 15618.44

V ≈ 125 m/s

b) The time of flight is equal to the time to reach the maximum height summed to the time to reach the land.

In vertical:

V = V₀ + a * t

V = 66.2 - g * t

0 = 66.2 - 9.8 * t

t ≈ 6.76 s

So: Δt = 13.24 s

c) In horizontal:

V = ΔS / Δt

106 = ΔS / 13.52  ⇒  ΔS = 106 * 13.52

ΔS = 106 * 13.52

ΔS = 1433,12

ΔS ≈ 1450 m

Answer:

Explanation:

In mathematics, the common logarithm is the logarithm with base 10. It is also known as the decadic logarithm and as the decimal logarithm. Natural logarithm of 379 is 5.9375362050824 Decimal logarithm of the number 379 is 2.5786392099681 Sine of 379 is 0.9055655749933. Cosine of the number 379 is -0.42420630521841. Tangent of the number 379 is -2.1347291727006

The Common logarithm for the 379 using a scientific calculator is 2.58. It means that 2.58 is the value of [tex]log_{10}[/tex] ( 379 ).

[tex]log_{a}[/tex] ( x ) = [tex]log_{10}[/tex] ( x ) / [tex]log_{10}[/tex] ( a )

This is how it should be calculated using a scientific calculator if you want to find the value of x for a different base. The commonly used base is 10 because in olden days logarithmic tables were used instead of calculators.

In order to reduce the calculations to basic formats such as addition and subtraction, base 10 was used. So calculators were designed in such a way that if you use log of any number it is the value of log with a base of 10.

Therefore, the Common logarithm for the 379 using a scientific calculator is 2.58. It means that 2.58 is the value of [tex]log_{10}[/tex] ( 379 ).

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