Physics College

## Answers

**Answer 1**

Because it’s a man fetus

## Related Questions

Một vật dao động điều hoà theo phương trình x = 12cos(4πt) (cm), biên độ dao động của vật là

### Answers

**Answer:**

**12 cm**

**Explanation:**

x = Acosωt

A = biên độ

when a cars velocity is positive and the acceleration is negative, what is happening to the motion of the car

### Answers

**Answer:**

the motion of a car is negative

**Explanation:**

formula for working maximum velocity?

### Answers

**Answer:**

Now, we know that velocity is maximum when y=0, i.e., displacement is zero and acceleration is zero, which means the system is in equilibrium. Therefore, at a point in simple harmonic motion, the maximum velocity can be calculated using the formula v=Aω.

**Explanation:**

A free falling object starts from rest. After 3 seconds, it will have a speed of about

### Answers

**Answer: 30 m/s**

hope this helps

A rocket already in flight fires its second stage. This accelerates the rocket at a rate of 80 m/s/s to a velocity of 3600 m/s in 25 seconds. What was the rocket's velocity, v, just before the second stage was fired?

### Answers

Assuming constant acceleration, we have

*a* (average) = *a* = ∆*v*/∆*t*

So if *v* is the rocket's velocity just before the second stage, we have

80 m/s² = (3600 m/s - *v*)/(25 s)

===> *v* = 3600 m/s - (80 m/s²) (25 s) = **1600 m/s**

A car with a mass of 1900 kg has a force of 475 N. What is the acceleration of the car?

### Answers

**Answer:**

0.25 m/s²

**Explanation:**

The acceleration of an object given it's mass and the force acting on it can be found by using the formula

[tex]a = \frac{f}{m} \\ [/tex]

f is the force

m is the mass

From the question we have

[tex]a = \frac{475}{1900} = 0.25 \\ [/tex]

We have the final answer as

0.25 m/s²

Hope this helps you

4. Which length is the shortest?

(2) 2 mm (3) 3 nm

(1) 1 um

(4) 4 cm

### Answers

The **shortest length** among the options is **3 nanometers** (option three).

What is length?

**Length** is the distance measured along the longest dimension of an object.

The basic unit of **length** in the International System of Unit is **metres**.

According to this question, four units of **lengths** were given as follows:

2 millimeters3 nanometers1 micrometers4 centimeters

The equivalence of each **measurement** to **metres** is as follows:

2 millimeters = 2 × 10-³ m3 nanometers = 3 × 10-⁹ m1 micrometers = 1 × 10-⁶ m4 centimeters = 4 × 10-² m

Therefore, the **shortest length** among the options is **3 nanometers**.

Learn more about **length** at: https://brainly.com/question/2497593

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REAL ANSWERS ONLY PLS

### Answers

**Answer:**

The statement of the student is correct.

Since B attained a higher velocity in a short amount of time, that is it accelerated faster(having a larger slope).

Slope = dy/dx

That is, Velocity

Time

which is acceleration.

That's my guess.

Hope it's right.

A swimmer reaches 50 meters away from the start in a swimming lane and swims back to the starting point. What is the total distance covered by the swimmer?

A. 0 m

B.10 m

C. 50 m

D. 100 m

### Answers

**Answer:**

100m

**Explanation:**

original distance crossed: 50m

final distance crossed: 50m

50m +50m = 100m

A hypothesis always starts with.....

Question 1 options:

If

then

conclusion

because

### Answers

**Answer:**

because

**Explanation:**

starts with question then explored through the mind.

Convert the following measurements as indicated, show work. write the answer in scientific notation.

A. 95 cm to meters

B. 1.1 L to milliliters

C. 17,000 m to kilometers

D. 5oo kg to grams

### Answers

**Answer:**

C. 17,000 m to kilometers

**Explanation:**

#CarryOnLearning

Answer:

A. 0.95 m

B. 1,100 ml

C. 17 km

D. 500,000 g

Explanation:

A. 95/100

B. 1.1 x 1,000

C. 17,000/1,000

D. 500 x 1,000

What process builds organic molecules such as sucrose by taking water away?

### Answers

Dehydration? I think that’s it.

A student drops a ball from a height of 97.0m. If the ball increases speed at a uniform rate of 10.0m/s^2, determine all unknowns and answer the following questions.

How long did the ball remain in the air?

What was the balls speed just before striking the ground?

### Answers

given :

h = 97.0 m

g = 10.0m/s²

find:

a) t

b) Vt

solutions:

a)

h = ½.g.t²

97 = ½. 10.t²

97 = 5.t²

t² = 97/5 = 19.4

t =√19.4 = 4.4

the ball will remain in the air

for **4****.****4**** ****s**

b)

Vt = g. t

= 10 × 4,4

= 44 m/s

the balls speed before striking the ground

= **4****4**** ****m****/****s**

The ball remained in the air for approximately 4.41 seconds.

The **ball's speed **just before striking the ground was approximately 44.1 m/s.

Calculate the time it takes for the ball to reach the ground using the equation for motion with **uniform acceleration**:

[tex]s = ut + 0.5 * a * t^2[/tex]

where:

s is the distance (height) = 97.0 m

u is the **initial velocity **= 0 m/s (since the ball is dropped)

a is the acceleration = 10.0 [tex]m/s^{2}[/tex]

t is the time we're solving for

Plugging in the values, we get:

97.0 = [tex]0.5 * 10.0 * t^2[/tex]

Solving for t:

[tex]t^2[/tex] = 97.0 / 5.0

t = [tex]\sqrt{(97.0 / 5.0)[/tex]

t ≈ 4.41 seconds

Calculate the final **velocity** of the ball just before it strikes the ground using the equation:

v = u + at

where:

v is the final velocity

u is the initial velocity = 0 m/s

a is the acceleration = [tex]10.0 m/s^{2}[/tex]

t is the time = 4.41 seconds (calculated in the previous step)

Plugging in the **values**:

v = 0 + 10.0 * 4.41

v = 44.1 m/s

To know more about **initial velocity, **here

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A β− and a β+ particle meet and interact within a tissue. Discuss what would be the likely outcome of this interaction.

### Answers

When a** β− **and a** β+ **particle **meet **and **interact **they are **annihilated**.

Every **matter **has an **antimatter**. An antimatter of a particular particle is another particle that has **exactly the same properties** as the initial particle but** carries an opposite charge.**

If we look at **β−** and ** β+ **particles, we will notice that they are **matter **and **antimatter**. The interaction of matter and antimatter leads to **annihilation**. The energy produced by annihilation of matter and antimatter is enough to destroy the tissue.

So, when** β−** and a **β+** particle meet and interact they are **annihilated**.

Learn more: https://brainly.com/question/23266051

YO IF YOU ARE GOOD AS SCIENCE PLEASE ANSWER THIS QUESTION IT WOULD HELP A LOT NO LINKS!!!

### Answers

**Answer:**

1.) the study of matter and energy (I think that's the only answer)

A friend tells you a way to estimate how far away a lightning bolt strikes. You count the number of seconds between seeing the flash and hearing the thunderclap. Then you divide that number by five to get a distance in mile. In terms of the physics of light and sound waves, does the method make sense?

### Answers

**Answer:**

yeah I think

**Explanation:**

I forget the deep method but u can detect the distance of the lighting bolt striking by counting from the lighting to the sound of thunderclap and dividing by a number but I forget the number

IN my conclusion it makes sense

a)List the names of three nonmetals you are familiar with in your daily life.

b)for each nonmetal you listed, describe two different uses for each.

### Answers

**Answer:**

food and water

**Explanation:**

health and starvation and for theist most important thing

Genes do not affect more than our physical characteristics

True

False

### Answers

false

reason- they affect much more than physical appearance

If the thermohaline circulation stops due to global warming, Europe will likely become ____

### Answers

**Answer:**

Hot desert

**Explanation:**

Hope it helps you

A converging lens (f = 18.0 cm) is located 20.0 cm to the left a diverging lens (f = -25.0 cm). An object is placed 50.0 cm to the left of the converging lens.

Calculate the position of the final image relative to the diverging lens.

Give your answer to 1 decimal place.

Note: if the 1st decimal place is a 0, canvas might auto-remove this but it will still be counted.

### Answers

The **position **of the **final image** relative to the **diverging lens** to 1 decimal place to **35.4 cm** to the left side of the** diverging lens.**

A **converging lens** is a **lens **that puts together **rays of light **that pass through its **primary axis.**

A **diverging lens** is a **lens** that causes **light rays** to **spread out** after they pass through the **optical axis** of the **lens.**

By using the **Lens Formula** from the information given:

[tex]\dfrac{1}{f}= \dfrac{1}{v}+\dfrac{1}{u}[/tex]

[tex]-\dfrac{1}{25}= \dfrac{1}{v}+\dfrac{1}{50}[/tex]

[tex]-\dfrac{1}{v}= \dfrac{1}{25}+\dfrac{1}{50}[/tex]

[tex]-\dfrac{1}{v}= \dfrac{3}{50}[/tex]

v = 16.67 cm

However, the above **image distance **relates to the object of the **diverging lens.**

The **object distance **can now be expressed as;

u' = (20 + 16.67) cm

u' = 36.67 cm

Again for a **diverging lens **according to the **lens **formula;

The **final image distance **formed is:

[tex]\dfrac{1}{18} = \dfrac{1}{v'}+\dfrac{1}{36.67}[/tex]

[tex]\dfrac{1}{v'}= \dfrac{1}{18} -\dfrac{1}{36.67}[/tex]

[tex]\dfrac{1}{v'}= \dfrac{1867}{6600}[/tex]

[tex]v' = \dfrac{66006}{1867}[/tex]

**v' = 35.4 cm**

Therefore, we can conclude that the **object **is placed at a distance of** 35.4 cm** to the **left **of the **diverging lens**

Learn more about the **lens **here:

https://brainly.com/question/3225974?referrer=searchResults

Ryan covers a distance of 500 m in 50sec. With what speed does he travel ?

### Answers

**Answer:**

s=d/t

s=10m/s

hope this will help you

have a great day

State the name in words and the symbol for the following:

one thousand metres

one-thousandth of a metre

### Answers

**Answer:**

Kilometer (km) and micrometer (um) respectively

**Explanation:**

One thousand meters is equal to one kilometer represented as km.

and

One thousandth of a meter mean 1/1000 m which implies one thousands part of a meter which is equal to micro meter and represented as um.

Five groups of four vectors are shown below. All magnitudes of individual vectors are equal. Please rank the groups based on the magnitude of the resultant vectors if the four vectors in each group were added together. Rank the groups of vectors from the greatest resultant magnitude to the smallest resultant magnitude.

Rank the groups of vectors from the greatest resultant magnitude to the smallest resultant magnitude.

### Answers

With the **addition of vectors** we can find that the correct answer is:

C) Q> P > R = S > T

The **addition of vectors **must be done taking into account that they have modulus and direction. The **analytical method **is one of the easiest methods, the method to do it is:

Set a Cartesian coordinate systemDecompose vectors into their components in a Cartesian systemPerform the algebraic sums on each axisFind the resultant vector using the **Pythagoras' Theorem** to find the modulus and** trigonometry **to find the direction.

In this exercise indicate that the **modulus** of all vectors is the same, suppose that the value of the modulus is A.

We fix a **Cartesian coordinate system **with the horizontal x axis and the vertical y axis, we can see that we do not need to perform any decomposition, so we perform the algebraic sums

**Diagram P**

x-axis

x = 2A

y-axis

y = 2A

The modulus of the resulting vector can be found with the Pythagorean Theorem

P = [tex]\sqrt{x^2+y^2}[/tex]

P = [tex]\sqrt{4A^2 +4A^2 }= \sqrt{8} \ A[/tex]

P = 2 √2 A

**Diagram Q**

x-axis

x = 3A

y-axis

y = A

Resulting

Q = [tex]\sqrt{x^2+y^2}[/tex]

Q =[tex]\sqrt{9A^2 + A^2 }[/tex]

Q = [tex]\sqrt{10} \ A[/tex]

**Diagram R**

x- axis

x = 0

y-axis

y = 2 A

Resulting

R =[tex]\sqrt{4A^2 + 0}[/tex]

R = [tex]\sqrt{4} \ A[/tex]

**Diagram S**

x-axis

x = 2 A

y-axis

y = 0

Resulting

S = 2A

**Diagram T**

x- axis

x = 0

y-axis

y = 0

Resultant T = 0

We **order the diagram** from highest to lowest

Q> P> R = S> T

When reviewing the different answers, the correct one is:

C. Q> P> R = S> T

Learn more about **adding vectors** here:

https://brainly.com/question/14748235

net force and acceleration

### Answers

**Answer:**

net force = 2.4N

a = 6m/s²

**Explanation:**

when are car velocity is positive and acceleration is negative, what is happening to the cars motion

### Answers

the motion of the car is negative

does anyone know what to do for this servsafe question ?

### Answers

The answer is in the attached picture

On your lower grades, you have already performed the Physical Fitness Test. And so, we assume that you already know how to demonstrate the various tests. Below is a template provided for you to accomplish by filling out the form.

Name:

Age:

THE:. (Moderate Activity)

Weight:

BMI:

Sex:

THR: (Vigorous Activity)

Height:

Classification:

### Answers

Name:Yashoda Basnet

Age:18

weight: 45

BMI:18.5

Height:5.3

**Answer:**

poop

**Explanation:**

List atleast 10 applications of chemical effect of electric current

### Answers

**Answer:**

formation of gas bubbles at electrodes

deposition of metals at electrodes

changes in solution colour

electroplating

electrolysis

the scale of Celsius scale Rises by 10 div (10 degree Celsius )what is the rise in temperature in fahrenheit scale?

### Answers

**Answer:**

1 deg C = 9/5 deg F (compare a rise of 100 to 180)

10 deg C = 9 * 10 / 5 deg F = 18 deg F

Which result occurs during an exothermic reaction?

A. Light is released into the environment, while heat is absorbed.

B. Heat is released into the environment, while light is absorbed.

C. Light and heat are absorbed from the environment.

D. Light and heat are released into the environment.

### Answers

In **exothermic **reactions, **heat **and **light **are released to the surrounding **environment**. On the other hand, in an **endothermic **reaction, **heat **is **required **and therefore it can be considered as a **reactant**.

In **exothermic **reactions, **light **and **heat **are **released **into the **environment **(Option D).

**Exothermic **reactions release energy in the form of **heat **or **light**.

**Combustion **reactions are generally **exothermic **reactions.

After an e**xothermic reaction** takes place it is possible to observe that the **energy **of the **products **of the reaction is **lesser **than the energy of the **reactants**.

The **energy **released in **exothermic reactions** is evidenced by the increase in **temperature **of the reaction.

Learn more in:

https://brainly.com/question/11753370?referrer=searchResults

**Answer:**

(Question) Which result occurs during an exothermic reaction?

(Answer) Light or heat are released into the environment.

(Question) Which event is an example of an endothermic reaction?

(Answer) photosynthesis

(Question) How is total reaction energy calculated?

(Answer) reactant bond energy – product bond energy

(Question) When producing hydrogen iodide, the energy of the reactants is 581 kJ/mol, and the energy of the products is 590 kJ/mol. The equation is shown.

H2 + I2 → 2HI

What is the total energy of the reaction? Is this an endothermic or exothermic reaction?

(Answer) –9 kJ/mol, exothermic

(Question) Hydrogen bromide breaks down into diatomic hydrogen and bromine in the reaction shown.

2HBr → H2 + Br2

The energy of the reactant is 732 kJ/mol, and the energy of the products is 630 kJ/mol.

What is the total energy of the reaction? Is this reaction endothermic or exothermic?

(Answer) 102 kJ/mol, endothermic

**Explanation:**

**just finished the quick check UwU**