Group the labels according to the type of force they describe
Contact, no contact or both

Formula :- Force = mass × acceleration

F= m × a

[tex]2 = 0.6 \times a \\ 2 \times \frac{10}{6} = a \\ \cancel2 \times \frac{10}{ \cancel6 {}^{ \: \: 3} } = a \\ \frac{10}{3} = a = 3.33[/tex]

Option A -> 3.3

Answer:

3.3 m/s²

Explanation:

Formula :

Given :

Solving :

Answer:

D. A force within a fluid that pushes upward

Explanation:

Buoyancy is the ability of something floating in water, so it's probably not about the attraction between molecules and is about a force within a fluid. If a force within a fluid is pushing downwards on an object, that would make the object go downwards (sink), which is not buoyancy. If a force within a fluid is pushing upwards on an object, the object would be floating.

Answer:

Option D

Explanation:

When you put any object and push it inwards water .

According to Newton's third law every action has equal and opposite reaction

So the water hits back with opposite force which is known as buoyant force.

Archimedies law is applicable in these cases

Answer:

See below

Explanation:

i)     Velocity of A  wrt B is  15 m/s east

ii)    A   30 * 25 = 750 m east      B   30 *10 = 300 m east

iii)    1 minute will be    15 m/s * 60 = 900 m  apart

Answer:

A) Pitch

Explanation:

Wavelength determines the pitch  ( or frequency which is 1/wavelength)

The magnetic field strength will be 6.1 x 10⁻⁴ T.

The magnetic field is the region of space where a charged object experiences magnetic force when it is moving.

The magnetic field strength is the magnitude of magnetic field in Tesla. It is related to velocity, magnitude of charge and force by the relation,

Magnetic force F = qVB

Given is the charge q = -8.8×10⁻²⁰ C, Force F = -5.2×10⁻¹⁶ N and the velocity v = 9.6×10⁶ m/s, then the magnetic field strength will be

B =  -5.2×10⁻¹⁶/-8.8×10⁻²⁰ x9.6×10⁶

B = 6.1 x 10⁻⁴ T

Thus, the magnetic field strength will be 6.1 x 10⁻⁴ T.

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Answer:

Granite

Explanation:

Trust me I learned this 2years ago

The term used to indicate different DNA nucleotide changes in humans exposed to radiation is called a mutation.

A mutation is any DNA nucleotide change or modification that occurs in the genome of a given organism.

Mutations may be caused by physical agents (e.g., UV radiation) or chemical agents.

In conclusion, the term used to indicate different DNA nucleotide changes in humans exposed to radiation is called a mutation.

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The analogy activity of the balloon with galaxies drawn on them is incorrect because galaxies may have different shapes.

A galaxy is a group of stellar systems like our solar system linked by gravity in a particular space and time in the Universe.

Galaxies may adopt different forms such as spiral galaxies, elliptical galaxies, irregular galaxies, etc.

In conclusion, the analogy activity of the balloon with galaxies drawn on them is incorrect because galaxies may have different shapes.

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Given the voltage of the lamp and the amount of current use, the power used by the lamp is 60Watts.

Power is the quantity of energy transferred per unit time. It can be expressed as;

P = v × I

Where v is voltage and I is current.

Given that;

P = v × I

P = 120V × 0.5A

P = 60Watts

Therefore, given the voltage of the lamp and the amount of current use, the power used by the lamp is 60Watts.

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The maximum kinetic energy, maximum potential energy and the maximum mechanical energy are equal to 7.56J.

Simple harmonic motion, in physics, repetitive movement back and forth through an equilibrium, or central, position, so that the maximum displacement on one side of this position is equal to the maximum displacement on the other side.

Simple Harmonic Motion

The given equation of the simple harmonic motion is

[tex]x=3.5 sin (\frac{\pi }{2t} + \frac{5\pi }{4} )[/tex]

Data;

ω = π/2

k = 1.254N/m

Solving this

[tex]\frac{dx}{dt} = -3.5 X \frac{\pi }{2} cos (\frac{x\pi t}{2}+\frac{5\pi }{4} )[/tex]

Let's calculate the maximum velocity.

[tex]V_{m} =\frac{3.5\pi }{2}[/tex]

This is only possible when cos θ = -1

The maximum kinetic energy is

[tex]K_m =\frac{1}{2} mv^2 = \frac{1}{2} X \frac{500}{1000} X \frac{7^2\pi ^2}^{4} ^2[/tex]

[tex]w^2 = \frac{k}{m} \\k = w^2m\\k = \frac{\pi ^2}{4} X \frac{500}{1000} \\k =1.254 N/m[/tex]

Using the value of spring constant, we can find the maximum potential energy.

[tex]P.E =\frac{1}{2} k x^2\\P.E =\frac{1}{2} X 1.234 X 3.5^2 \\P.E = 7.56 J[/tex]

The maximum potential energy is 7.56J

The maximum mechanical energy is equal to the sum of maximum potential energy and the maximum kinetic energy.

ME = K.E + P.E

ME = 7.56J

From the calculations above, the maximum kinetic energy, maximum potential energy and the maximum mechanical energy are equal to 7.56J.

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#1

[tex]\\ \rm\dashrightarrow P=VI\implies V=\dfrac{P}{I}[/tex]

[tex]\\ \rm\dashrightarrow V=\dfrac{0.4\times 10^3}{33\times 10^{-3}}[/tex]

[tex]\\ \rm\dashrightarrow V=0.012\times 10^{-6}[/tex]

[tex]\\ \rm\dashrightarrow V=12mV[/tex]

#2

[tex]\\ \rm\dashrightarrow R=\rho \dfrac{\ell}{A}[/tex]

[tex]\\ \rm\dashrightarrow \rho =\dfrac{RA}{\ell}[/tex]

[tex]\\ \rm\dashrightarrow \rho=\dfrac{86.3(0.4\times 10^6)}{69}[/tex]

[tex]\\ \rm\dashrightarrow \rho=0.5\times 10^{6}[/tex]

#3

Ohms law

[tex]\\ \rm\dashrightarrow R=\dfrac{V}{I}[/tex]

[tex]\\ \rm\dashrightarrow R=\dfrac{7(10^3)}{6(10^{-6})}[/tex]

[tex]\\ \rm\dashrightarrow R=1.167\times 10^9\Omega[/tex]

A drawing shows a crystalline slab (refractive index 2.043) with a rectangular cross-section, the maximum value of n   is mathematically given as

nm=1.627

Generally, the equation for the snells law  is mathematically given as

[tex]n=\frac{sin \theta_1}{sin \theta_2}[/tex]

Therefore

[tex]\theta_2=sin-1(sin35/1.725)\\\\\theta_2=19.42[/tex]

From the image critical angle is

ic=90-19.42

ic=70.58

In conclusion, snells law for total internal reflection

[tex]gn=\frac{sinic}{sin90}[/tex]

sinic=nm/ng

nm=1.725*sin70.58

nm=1.627

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It gives humans space to build houses or shelters.

Answer:

The gravitational force of an object that has half the mass is C) 9G.

Explanation:

Newton's Law of Gravitation:

We can see that the gravitational force, [tex]F_g[/tex], and mass (let's combine M * m into just "m"), [tex]m[/tex], are directly proportional to each other.

This means that if [tex]F_g[/tex] increases, [tex]m[/tex] also increases.

Therefore, if the mass is halved, that means that the gravitational force is also going to be halved.

The answer is 18G / 2 = 9G, which corresponds to answer C) 9G.

Answer:

1) convection.

2) thermometer.

3) Celsius scale.

4) Radiation.

5) Conduction.

6) Clinical thermometers.

Explanation:

so the questions have already given you a simple idea of their meanings.

Good luck.

Answer:

Work = Force * Distance

Here,

force = 124 N

distance = 13m

Thus, Work = 124 * 13 = 1612 joules(J)

(a) The work done by the frictional force is -33.1 J.

(b) The work done by the gravitational force is 175.58 J

The work done by frictional force is calculated as follows;

W = -μmgsinθ x L

W = -μmgsinθ  x L

where;

W = -0.18 x (12.7 + 14)9.8 x sin(17) x 2.4

W = -33.1 J

W = mgh

W = mgcosθ  x h

W = mgcosθ  x Lsinθ

W = (26.7)(9.8)cos(17) x 2.4 x sin(17)

W = 175.58 J

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Explanation:

the radius is always half of the diameter.

so, the radius is approximately 3.6/2 = 1.8 in.

and the circumference of a circle is

2×pi×r = d×pi = 3.6×3.14 = 11.304 ≈ 11.3 in.

Answer:

the answer is equal to yes

Because of the formula

Let's see

how

m is mass

v is velocity

as it's v²

So kinetic energy can't be negative

We can confirm that Neil deGrasse Tyson made this claim due to the fact that NASCAR races use speakers with the sounds of the race.

The Doppler effect in regards to sound is a shift in the way we hear the sound as the object is coming closer and then moving farther away, something that NASCAR cars do very often during races. Placing speakers would overlap this sound with a constant sound wave, making the audience unable to perceive the doppler effect.

Therefore, we can confirm that Neil deGrasse Tyson made this claim due to the fact that NASCAR races use speakers with the sounds of the race.

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(a) The mathematical description of the displacement of the wave, y1(x,t) = 0.2 m.

(b) The mathematical description of the displacement of the wave, y2(x,t) = 0.4 m.

(c) The mathematical description of the displacement of the wave, y3(x,t) = 0.2 m

(d) The mathematical description of the displacement of the wave, y4(x,t) = 0.33 m

The general wave function is written as follows;

y(x, t) = Acos(kx - ωt)

where;

y0 = Acos(kx - ωt)

y0 = 20cm x cos(0 - 0)

y0 = 20 cm

y1(x,t) = 20cm x cos(0 - 0) = 20 cm

y1(x,t)= 20 cm = 0.2 m

Thus, y1 = y1 + y0

y2 = y0 + y1 + y2

y2 = 20 cm + 0 + 20 cm

y2(x,t)= 40 cm = 0.4 m

y3 = y0 + y1 + y2 + y3

y3 = 20 cm + 0 + 20 cm - 20cm

y3(x,t)= 20 cm = 0.2 m

y4 = y0 + y1 + y2 + y3

y4 = 20 cm + 0 + 20 cm -20 cm + 13 cm

y4 = 33 cm

y4(x,t) = 33 cm = 0.33 m

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Answer:

Explanation:

Answer

How about a thunder storm. I don't know if you live in a city or out in the sticks as I do. Lighting is very obvious and it is not a good idea to be out when experiencing a thunderstorm, especially in an open field. You might be the only thing around that will cause the lightning to be connected to the ground.#  Seconds later, you will hear the thunder which is quite harmless. If you live in the city, observing this is not quite so easy. There are all kinds of buildings around and some of them may block your view.

#The great golfer, Lee Travino, was "hit" by lightening storm twice while playing in tournaments.

Answer:

A. conduction

Explanation:

Conduction is the transfer of energy from one molecule to another by direct contact.

Answer:

C. Amplitude

Explanation:

The students can feel the vibrations from the bleachers, but not from the drums because of the resonance.

The resonance condition occurs when the frequency of a wave matches with the resonance frequency.

The transfer of energy becomes maximum when the natural frequency matches with the frequency generated by the source.

The bleacher and student together having the frequency matching with the resonance frequency of the drum.

The bleacher and student with the bag frequency doesn't match with the resonance value of drums. Secondly, as distance increases sound intensity also decreases.

Thus, the student can feel the vibrations from the bleachers, but not from the drums because of the resonance.

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Answer:

140.85 is the correct answer

Explanation:

The formula for work is

[tex]w = |f| |d| \cos(x) [/tex]

where x is the angle between the displacement and force.

F is the force that is currently being active.

D is the displacement.

We only want our force and displacement to be positve so we use the absolute value sign.

Since the rocket and the displacement is both upwards, the signs. between them is 0.

So since

[tex] \cos(0) = 1[/tex]

We can just use that

[tex]w = |f| |d| [/tex]

First, we covert km to m.

[tex]144 \: km \times \frac{1000 \: m}{1 \: km} = 144000 m[/tex]

Now, we can multiply.

[tex]w = 14400 \: km \: \times (6.27 \times 10 {}^{5} )[/tex]

[tex]w = (1.44 \times 10 {}^{5} ) \times (6.27 \times 10 {}^{5} )[/tex]

[tex]w = 9.0288 \times 10 {}^{10} [/tex]

N times Meters = J so our answer is

[tex]w = 9.0288 \times 10 {}^{10} \: j[/tex]