) observer a, who is at rest in the laboratory, is studying a particle that is moving through the laboratory at a speed of v

12.00 min = 0.2 hr

8.00 min = 0.15 hr

Total distance:

(10.0 km/hr) (0.2 hr) + (15.0 km/hr) (0.15 hr) + (20.0 km/hr) (0.2 hr)

= 8.25 km

Average speed:

(10.0 km/hr + 15.0 km/hr + 20.0 km/hr) / 3

= 15 km/hr

Change in position:

(10.0 km/hr) (0.2 hr) + (15.0 km/hr) (0.15 hr) - (20.0 km/hr) (0.2 hr)

= 0.25 km

Average velocity:

(10.0 km/hr + 15.0 km/hr - 20.0 km/hr) / 3

≈ 1.67 m/s

Answer:

winter

Explanation:

winter because the sun is not reaching the nothern hemisphere directly so the season inthe nothern hemisphere is winter.

and also it cannot be autumn because autumn is a season for leaves falling.

and also it cannot be spring because spring is the season for growth.

and also it cannot be summer because sumer is the season for the sun rays reaching directly on the earth.

HOPE THIS HELPS.

The total displacement of Joe from the starting point is 5 blocks to the west.

Displacement of a body or a person is the total distance travelled by the person in a specified direction.

Displacement is a vector quantity. Thus, in order to determine the displacement of a body, the total distances travelled are summed by vector addition.

The displacement of Joe is obtained by vector addition as follows:

Assuming the starting point is X

Distance travelled to the South = 5 blocks

Distance travelled to the West = 5 blocks

Distance travelled to the North = 5 blocks

The displacement from the starting point is 5 blocks to the west.

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A parallel beam of * particles with fixed kinetic energy is normally incident on a piece of gold foil. (a) if 100 * particles per minute are detected at 20, 20 will be counted at 40, 60, 80, and 100.

In physical science, the dynamic energy of an article is the energy that it has because of its movement. It is characterized as need might have arisen to speed up a body of a given mass from rest to its expressed speed. Active energy is the development energy of an item. Active energy can be moved among objects and changed into different sorts of energy. Nonetheless, it isn't impacted by the climate beyond the article or framework, like air or level. Then again, motor energy is the energy of an item or a framework's particles moving. In spite of expected energy, the dynamic energy of an article is comparative with other fixed and moving items present in its nearby climate.

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Answer:

Steel

Explanation:

Sound waves travel over 17 times faster through steel than through air.

Answer:

Steel

Explanation:

This is because solid objects molecules are more packed together, therefore it travels faster, in which time oxygen by 17 times faster

Answer:

Chemical reactions are represented on paper by chemical equations. For example, hydrogen gas (H2) can react (burn) with oxygen gas (O2) to form water (H20). The chemical equation for this reaction is written as: The '+' is read as 'reacts with' and the arrow '' means 'produces'.

Explanation:

hope this helps

The time interval over which the proton is projected in the positive x direction into a region of a uniform electric field comes at rest is 4.93×〖10〗^(-8) s as it travel 7.00cm

Using the initial velocity and acceleration gotten from the linked questions where;

u=-2.84×〖10〗^6  m/s

a=5.76×〖10〗^13 m/s^2

Using the equation of velocity as;

v=u+a.t

0=u+a.t

Therefore, time t;

t=(-u)/a

t=(-2.84×〖10〗^6  m/s)/(5.76×〖10〗^13 m/s^2 )

t=4.93×〖10〗^(-8) s  

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Answer:

0.5m/s²

Explanation:

F =m x a

3.5 = 7 x a

a = 3.5 /7

a = 0.5m/s ²

Answer:

An anode is an electrode through which conventional current (positive charge) flows into the device from the external circuit, while a cathode is an electrode through which conventional current flows out of the device.

Explanation:

Answer:

3200

Explanation:

Answer:

D

Explanation:

If the meteoroid survives the impact, the Mach angle of the shock wave in water is 4.40°.

The square root of the proportion between the elastic force and the inertia force of a flowing fluid is known as the Mach number. Mach Angle (M) = The Mach Number (M). It is described as the Mach cone's halved angle.

A huge meteoroid travels at a speed of v (object) = 20.0 km/s as it enters the atmosphere and does not experience much braking before hitting the water.

Now,

v(object) = 20 km/s =20 × 10³ m/s

The speed of sound in seawater is:

v(sound) = 1533 m/s

The Mach angle in seawater is given as:

θ = sin⁻¹ ( v(sound) / v(object) )

θ = sin⁻¹ ( 1533 / 20 × 10³ )

θ = 4.40°

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Answer: the answer is 3.200×107  ​h

Explanation:

here's proof, honestly had no idea either so i just guessed, but hope this helps!

At extreme pressure, the volume of the real gas will be more compared to the prediction of the ideal gas law.

Ideal Gas Law gives PV = nRT, where

P - pressure of the gas

V - Volume of the gas

R - Gas constant

T- Temperature

n - number of particles

It says that high pressure decreases the volume of the gas occupied.

But ideal gas law fails for real gases. In the case of real gases, the gas molecules interact together and gives rise to its volume when high pressure is applied. The assumptions of Ideal gas law includes that the particles should not be able to interact with each other and it doesn't work at low temperature and high pressure.

So for real gases, extreme pressure increases the volume of the gas which does not agree with the prediction of ideal gas law.

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The maximum torque on wire is 0.12 x [tex]10^{-3}[/tex] N-m.

We have current carrying wire in a form of a circle placed in a uniform magnetic field.

We have to find the maximum torque on the wire.

The torque on a wire placed in a uniform magnetic field is given by -

[tex]$\tau = IAB\;sin\theta[/tex]

According to the question, we have -

Diameter of wire (D) = 10 cm

Therefore -

Radius of wire (r) = 5 cm = 1/20 meter.

Magnetic field (B) = 3 mT = 3 x [tex]10^{-3}[/tex] T

I = 5 A

Using the formula for torque -

[tex]$\tau = IAB\;sin\theta[/tex]

For maximum torque -

[tex]\theta[/tex] = 90

Therefore -

[tex]$\tau = IAB[/tex] =  5 x 3.14 x [tex]\frac{1}{20}[/tex] x [tex]\frac{1}{20}[/tex] x 3 x [tex]10^{-3}[/tex] = 0.12 x [tex]10^{-3}[/tex] N-m.

Hence, the maximum torque on wire is 0.12 x [tex]10^{-3}[/tex] N-m.

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The density of the charge carriers, each of which has charge of magnitude e is [tex]6.13*10^{25} m^{-3}[/tex].

The density of a substance is its mass per unit of volume (volumetric mass density or specific mass). Although the Latin letter D may also be used, the most common symbol for density is (the lower case Greek letter rho).

The mass concentration in numbers of a pure substance is equal to its density. The density of various materials varies widely and can have an impact on packaging, purity, and buoyancy. The known densest elements at normal pressure and temperature are osmium and iridium.

The dimensionless number "relative density" or "specific gravity," which is the ratio of the substance's density to that of a reference material, is sometimes used in place of density when comparing dissimilar systems.

Calculations:

Current I =120mA

Magnetic field B = 0.0840T

Hall voltage Δ[tex]V_{H} =\frac{I B}{ntq}[/tex]

[tex]\frac{ngt}{I} = \frac{B}{V_{H} }[/tex]

      [tex]=\frac{0.0840T}{0.640 * 10^{-6}V }[/tex]

     =[tex]1.31 * 10^{5} T / V[/tex]

And when placed in an unknown magnet field B will be

[tex]B=(\frac{nqt}{I} )(V_{H})[/tex]

=(0.300[tex]* 10^{-6} V[/tex])(1.31 * [tex]10^{5}[/tex] T/ V)

=0.0393 T

=39.3mT

(b)

In the before part we got,

[tex]\frac{ngt}{I} = 1.31 * 10^{5} T/V[/tex]

The density will be

n=(1.31*[tex]10^{5}[/tex] T/V)[tex]\frac{0.120A}{(1.602*10^{-19} C)(1.60*10^{-3}m) }[/tex]

 =[tex]6.13*10^{25} m^{-3}[/tex]

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Answer:

The Geomagnetic North Pole, a related point, is the pole of an ideal dipole model of the Earth's magnetic field that most closely fits the Earth's actual magnetic field. The North Magnetic Pole moves over time according to magnetic changes and flux lobe elongation in the Earth's outer core.

Answer:

Force of the ball against the bat

Explanation:

Newton's third law of motion states that for every action, there is an equal and opposite reaction. When a player hits a ball with a bat, the force the player exerted on the ball through the bat gave the ball a push force in the forward direction. This is an action force. Now that an action has been initiated, there must be a reaction according to Newton's third law of motion. The magnitude of the force on the ball equals the magnitude of the force on the bat. The direction of the force on the ball is opposite to the direction of the force on the ball. The ball will give the bat an equal and opposite force trying to push the bat backward by resisting the impact of the bat. This is the reaction. The ball will only move if the applied force is able to overcome the resisting force by the bat

Where;

is the action force of the bat against the ball.

is the equal and opposite reaction force of the ball towards the ball.

Answer:

I can not see the image, so i will answer in a general way.

As you know, the sound behaves like a wave, this means that the sound needs some time to cover a given distance. An example of this motion can be seen when you drop a little stone in water, and you can see how the waves expand.

This means that the one who will hear the sound first, will be always the one that is closer to the source of the sound, in this case, the sound comes from the ball hitting the backboard, then the one who is closer to the backboard will hear the sound first.

Answer:

A point at which parts of an artifical structure are joined

The correct answer is option A: Has varying acceleration

An object is undergoing simple harmonic motion. Throughout a complete cycle, it has varying acceleration.

In Physics, simple harmonic motion(SHM) refers to the periodic motion or back-and-forth movement of a particle through a central position or equilibrium point.

In SHM, the maximum position of the particle on one side is equal to the extreme displacement of the particle on the opposite side.

To put it simply, SHM is a type of motion in which the object moves along a straight line having a particular acceleration proportional to the displacement and its direction is always towards the central fixed position i.e O.

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Answer: 5.8 m/s squared

Explanation: just got that question lol

The charge on each balloon is 100nC or 1.2 × 10^-7 C

Consider two balloons of diameter 0.200m each with a mass of 1.00g hanging apart with 0.0500m separation on the ends of string making angles of 10.0° with the vertical.

The charge on each balloon can be found from

[tex]F_{e} = \frac{k_{e}q^{2} }{r^{2}} \\q = \sqrt{\frac{k_{e}q^{2} }{r^{2}}} \\\\q = \sqrt{\frac{(2\times10^{-3N}(0.25m)^{2}}{8.99\times10^{9}N\cdotm^{2}/C^{2}}\\[/tex]

[tex]q = 1.2\times10^{-7}C[/tex] or 100nC

An electric charge is the property of matter where it has more or fewer electrons than protons in its atoms. Electrons carry a negative charge and protons carry a positive charge. The matter is positively charged if it contains more protons than electrons and negatively charged if it contains more electrons than protons.

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Answer:

Answer choice D!

Explanation:

When it comes to running during a hot day, the human body responds to extensive periods of heat by producing sweat. Sweat is necessary in order of cooling down the body, so that is why I figured it would be that answer. I hope this helped!

Answer:

anti-lock braking system

Explanation: