The spacecraft that really gave scientists their first good close-up look at the planet Mercury was:

Answer:

The resistance of a cylindrical segment of a conductor is equal to the resistivity of the material times the length divided by the area: R≡VI=ρLA. The unit of resistance is the ohm, Ω.

Explanation:

Answer: 2

Explanation:

The statement "All magnets pick up paperclips, but the number of paperclips depends on the magnet" is neither a hypothesis nor testable.

The hypothesis that is not testable based on the given data is magnets will pick up metal objects but not plastic objects. Option C is the correct answer.

The reason this hypothesis is not testable based on the given data is that the information provided only pertains to the number of paperclips picked up by different magnets. It does not provide any information or evidence regarding the ability of magnets to pick up metal objects versus plastic objects. Option C is the correct answer.

In order to test this hypothesis, we would need data or experiments specifically focusing on the interaction between magnets and metal objects as well as magnets and plastic objects. The given data only provides information about the number of paperclips picked up by different magnets, which does not support or refute the hypothesis about the ability of magnets to pick up different materials.

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Answer:

-12.12

Explanation:

i just added them together and it worked.

Answer:

c

Explanation:

Question :-

Answer :-

Explanation :-

As per the provided information in the given question, The Resistance is given as 20 Ohm's . Current is given as 1.5 Amperes . And, we have been asked to calculate the Voltage .

For calculating the Voltage , we will use the Formula :-

[tex] \bigstar \: \: \: \boxed {\sf { \: Voltage \: = \: Current \: \times \: Resistance \: }} [/tex]

Therefore , by Substituting the given values in the above Formula :-

[tex] \Longrightarrow \: \: \: \sf { Voltage \: = \: Current \: \times \: Resistance } [/tex]

[tex] \Longrightarrow \: \: \: \sf { Voltage \: = \: 1.5 \: \times \: 20 } [/tex]

[tex] \Longrightarrow \: \: \: \bf { Voltage \: = \: 30 } [/tex]

Hence :-

[tex] \underline {\rule {180pt}{4pt}} [/tex]

Additional Information :-

[tex]\Longrightarrow \: \: \: \sf {Voltage \: = \: Current \: \times \: Resistance} [/tex]

[tex] \Longrightarrow \: \: \: \sf {Current \: = \: \dfrac {Voltage}{Resistance}} [/tex]

[tex] \Longrightarrow \: \: \: \sf {Resistance \: = \: \dfrac {Voltage}{Current} } [/tex]

Answer:

Explanation:

Given:

To Find:

Solution:

Using formula:

By Substituting the required values,

⇢ Voltage = 1.5 × 20

⇢ Voltage = 30 Volts.

Hence,

Answer:

Transverse

Explanation:

The direction of propagation is perpendicular to the motion of the hand. Therefore the wave undergoes a vertical stretching, which is characteristic of transverse waves. Longitudinal waves stretch horizontally.

Given the data from the question,

The charge in a circuit is related to the current and time according to the following equation

Charge (Q) = current (I) × time (t)

Q = it

Q = it

Q = 2.5 × 39

Q = 97.5 C

Q = it

Q = 3.8 × 24

Q = 91.2 C

From the above calculations, we can conclude as follow:

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Answer:

BBB

Explanation:

Answer:

a person pushes water with his hands in the backward direction is action and water in turns pushes him forward due to force is reaction.

Explanation:

Answer:

333N

Explanation:

=>First you have to find the mass of the asteroid.

so 882N÷9.8m/s²=90Kg

then,multiply it by Mars's gravity

=>90Kg*3.7m/s²=333N

[tex]\qquad\qquad\huge\underline{{\sf Answer}}[/tex]

The Correct choice is D

Heat always travel from higher temperature body to lower temperature. so we can infer that heat is transferred from the warmer water to the ice cubes which causes melting of that ice in there.

Answer:

An electron added to a noble gas must go in the next higher energy level. The periodic trend for electron affinity values is not as consistent as for other trends.

Tidal volume is the amount of air that moves in and out of the lungs, while vital capacity is the maximum amount of air a person can expel.

Tidal volume is the amount of air that moves in or out of the lungs with each respiratory cycle.

Vital capacity is the maximum amount of air a person can inhale after a maximum exhalation or maximum amount of air a person can expel from the lungs after a maximum inhalation.

Tidal volume is the amount of air that moves in and out of the lungs, while vital capacity is the maximum amount of air a person can expel from the lungs after a maximum inhalation.

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Answer:

Natural selection is a simple mechanism that causes populations of living things to change over time.  Organisms that are more adapted to their environment are more likely to survive and pass on the genes that aided their success.

[tex]\qquad\qquad\huge\underline{{\sf Answer}}[/tex]

The Correct choice is D

Gene are special biomolecules that have all the required information of that organism, and has an instruction for making protein molecules.

Answer:

wait in comments....................

When carbon dioxide is in ocean water it bonds to carbonate, preventing its use by coral reefs and currents.

Carbon dioxide (CO2) is made use of by aquatic photosynthetic organisms to make their own food.

Some examples of aquatic organisms that makes use of carbon dioxide are:

However, when carbon dioxide is in ocean water it bonds to carbonate, preventing its use by coral reefs and currents.

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Answer:

coral reefs and shellfish

Explanation:

Both need carbonate

Answer:

D.

Explanation:

all of the options are true.

The gauge pressure in the higher part will be 136 kph. The pressure is found with the help of the Bernoulli equation.

The difference between absolute pressure and atmospheric pressure is known as gauge pressure. Relative pressure is another name for gauge pressure.

From the continuity equation;

[tex]\rm A_1v_1=A_2v_2 \\\\ \rm \frac{\pi}{4}(6)^2 \times 5 = \frac{\pi}{4}(3)^2 v_2 \\\\ v_1 = 20 \ m/sec[/tex]

The gauges pressure in the higher part is found as;

From the Bernoullis equation;

[tex]\rm \frac{P_1}{\rho g} + \frac{v_1^2}{2g} +Z_1 = \frac{P_2}{\rho g} + \frac{v_2^2}{2g} +Z_2 \\\\ \frac{80 \times 10^3 }{\rho g} + \frac{(5)^2}{2g} +0= \frac{p_2}{\rho g} + \frac{(20)^2}{2g} +3 \\\\ \frac{80 \times 10^3 - P_2 }{1000 \times 9.81 } = \frac{20^2-5^2}{2 \times 9.81 } +3 \\\\ P_2 = 136 \ kpa[/tex]

Hence the gauge pressure in the higher part will be 136 kpa.

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Since the equivalent resistance is decreased then current must be increased in the circuit.

Resistance is defined as the obstruction offered by the circuit in the flow of charge or current.

When three resistors are connected in series then the total equivalent of all three is given by

[tex]R_{eq}=R_1+R_2+R_3[/tex]

Also in this case current is given by

[tex]I=\dfrac{V}{R_{eq}}[/tex]

Now if one of the resistance is removed

Then

[tex]R_{eq}=R_1+R_2[/tex]

let one of the resistance is removed

while current flowing in the open circuit will be given by

[tex]I=\dfrac{V}{R_{eq}}[/tex]

So here since resistance is decreased then current must be increased in the circuit.

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Answer:

B. The equivalent resistance would increase and the current would decrease.

Explanation:

Placing the electromagnetic radiation in order from the lowest energy to the highest energy :  ( 2 ) C,A,B

In the electromagnetic spectrum the electromagnetic radiation with the shorter wavelength possess a higher energy while the electromagnetic radiation with a longer wavelength possess the lower energy.

The electromagnetic radiation as listed in the question with the longest wavelength is the radio waves therefore it possess the lowest energy while the radiation with the shortest wavelength is the gamma rays therefore it possess the highest energy.

Hence we can conclude that Placing the electromagnetic radiation in order from the lowest energy to the highest energy :  ( 2 ) C,A,B

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Answer:

See below

Explanation:

For 30 m/s :

 KE = 1/2 mv^2

      1/2 (1850)(30^2) = 832500 J

For 120 km/hr :

120 km/hr = 33.333 m/s

  KE = 1/2 1850 (33.333)^2 1027777.8 J  

Answer:

See

distance is 10 km

displacement is 5√2 km

Explanation:

DISTANCE:

Distance is scaler so, it doesn't depend on the direction

so distance is 5+5 which is 10

DISPLACEMENT:

Displacement is a vector, so, it depends on direction.

Now when we see north and east, they form a right angle, so we need to calculate the hypotenuse of the triangle for displacement as it is the shortest route between the two points.

Let hypotenuse be h

Hope it helps

BYE.

The kinetic energy of the moving express train with the given value of mass and velocity is 7.5 × 10⁵Joules.

Kinetic energy is simply a form of energy a particle or object possesses due to its motion.

It is expressed as;

K = (1/2)mv²

Where m is mass of the object and v is its velocity.

Given the data in the question;

To determine the kinetic energy of the train, we substitute our given values into the above expression.

K = (1/2)mv²

K = (1/2) × 600kg × (50m/s)²

K = 0.5 × 600kg × 2500m²/s²

K = 750000kgm²/s²

K = 7.5 × 10⁵J

Therefore, the kinetic energy of the moving express train with the given value of mass and velocity is 7.5 × 10⁵Joules.

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Answer:

Composition.

Explanation:

the inner planets tend to be made up of more solid materials such as iron, while outer planets are made up of primarily gas and ice

500 km

distance = speed x time

Here given:

Distance: 100 x 5 ⇒ 500 km

Answer:

500 Km

Explanation:

Speed of the car = 100 km/h

Distance the car covers in 5 hours

= Speed of the car × time

= 100 × 5

= 500 Km

Hope this helps ⚜