PHYSICS HIGH SCHOOL

The attraction of liquid particles for a solid surface is due to ____.

Answers

Answer 1
Answer:

Answer:

the force of adhesion.

Explanation:

The attractive force between the two types of molecules is called adhesive force.

So, the force between the liquid molecule and the solid molecule is adhesive in nature.

The attractive force acts between the two same type of molecules is called cohesive force.

Answer 2
Answer: This attraction occurs from adhesion, also known as adsorption 

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Electtromagneticradiation

Answers

Electromagnetic Radiation behaves something like a wave and sometimes like a stream of particles.
Th definition is the energy released by an electromagnetic process. 

A 1250 kg Nascar is at the starting line. The race starts and the car reaches a speed of 30m/s in 10 seconds. What is the force of the car? (Hint: Remember that acceleration
change in velocity / time.)

Answers

Answer:

force=1250kg * 30m/s+10

Explanation: it's a change in acceleration

The amoeba is a protozoan that moves with _____. flagella
cilia
pseudopodia
none of the above

Answers

The amoeba is a protozoan that moves with the pseudopodia. Pseudopodia is known as the false foot. Thus, the correct option is C.

What is Pseudopodia?

A pseudopod or pseudopodia is a temporary arm-like projection of a eukaryotic cell membrane such as algae that is emerged in the direction of movement of the organism. These are filled with cytoplasm. Pseudopodia primarily consist of the actin filaments and may also contain microtubules and other intermediate filaments.

Pseudopodia are responsible for the amoeboid movement, which includes sliding or crawling-like form of locomotion. This motion is visible in amoeba. The formation of cytoplasmic projections, or pseudopodia, on the cell surface, pulling the cell along in the direction of food, is a characteristic of the microscopic unicellular protozoans known as amoeba.

Therefore, the correct option is C.

Learn more about Amoeba here:

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The amoeba is a protozoan that moves with pseudopodia.

Answer: Pseudopodia

What is the momentum of a 75.0-kilogram defensive back chasing the fullback at a velocity of 5.00 m/sec.

Answers

Answer : The momentum is, 357 kg.m/s

Explanation :

Momentum : It is defined as the motion of a moving body. Or it is defined as the product of mass of velocity of an object.

Formula of momentum is:

p=mv

where,  

p = momentum

m = mass  = 75.0 kg

v = velocity  = 5.00 m/s

Now put all the given values in the above formula, we get:

p=75.00kg* (5.00m/s)=357kg.m/s

Therefore. the momentum is, 357 kg.m/s


75 kg × 5 m/sec = 375 kgm/s

Hope this helps :)

The line of sight from a small boat to the light at the top of a 45-foot lighthouse built on a cliff 25 feet above the water makes a 20° angle with the water. To the nearest foot, how far is the boat from the cliff?

Answers

Answer:

The boat is 192 feet from the cliff.

Explanation:

Hi there!

Please see the attached figure for a graphical description of the problem.

Notice that the line of sight, the distance to the cliff and the height to the top of the lighthouse form a right triangle. Hence, we can apply trigonometric rules to find the distance from the boat to the cliff:

cos 20° = adjacent side / hypotenuse

sin 20° = opposite side / hypotenuse

The length of the opposite side is the height of the cliff plus the height of the lighthouse:

opposite side = 45 feet + 25 feet = 70 feet.

Using the equation of sin 20°, we can obtain the hypotneuse:

sin 20° = opposite side / hypotenuse

hypotenuse · sin 20° = opposite side

hypotenuse = opposite side / sin 20°

hypotenuse = 70 feet / sin 20°

hypotenuse = 205 feet

Now, using the equation of cos 20°, we can calculate the distance to the cliff (the length of the adjacent side):

cos 20° = adjacent side / hypotenuse

hypotenuse · cos 20° = adjacent side

205 feet · cos 20° = adjacent side

adjacent side = 192 feet  (without rounding intermediate results)

The boat is 192 feet from the cliff.

Answer:

192 ft.

Explanation:

Tan (20) = Opp/Adj

Tan (20) = (45+25)/x

Tan (20) =  70/x

then x=70/Tan (20)

x= 192.3234 ft, and then rounded to the nearest foot...

x= 192 ft

Which statement is correct? a) 1 in. = 2.54 cm b) 7 in. = 17.68 cm c) 1 ft = 12 in. d) 74 in. = 1 yd

Answers

Answer:

a) 1 in. = 2.54 cm

Explanation:

Final answer:

The correct statement is a) 1 in. = 2.54 cm. To convert inches to centimeters, multiply the number of inches by the conversion factor 2.54 cm/1 in.

Explanation:

The correct statement is a) 1 in. = 2.54 cm.

To convert inches to centimeters, you can multiply the number of inches by the conversion factor 2.54 cm/1 in. For example, if you want to convert 7 inches to centimeters, you would multiply 7 in. by 2.54 cm/1 in. This gives you 17.78 cm, which is approximately equal to 17.68 cm (as stated in option b).

Option c) 1 ft = 12 in. and option d) 74 in. = 1 yd are also correct statements, but they are not directly related to the conversion between inches and centimeters.

Learn more about Conversion between inches and centimeters here:

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