How many grams of Hydrogen (H) would need to react with 190 grams of Fluorine (F) to make 200 grams of HF (Hydrofluoric Acid)?

Answers

Answer 1

Answer: I would look this one up on google

Answer 2

Answer:

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A helicopter’s speed increases from 30 m/s to 40 m/s in 5 seconds. What is the acceleration of this helicopter? m/s2

What are the 3 things needed to make hurricane

Answers

Low air pressure, warm temperatures, and tropical winds near the equator.
Thanks,
-LittleManOfCheese

Warm sea surface temperatures, light winds, and rotation or spin.

Acoustics involves the study of _______ and the mediums through which they travel.A.Light waves
B.mechanical waves
C.electromagnetic waves
D.gamma rays

Answers

Answer: The correct option is B.

Explanation:

Acoustic deals with the study of mechanical waves and the mediums through which they travel. It includes sound, infra sound, ultrasound and vibrations.

The mechanical wave is a wave which can travel through a material medium. It can travel through solid, liquid and gases. Sound is the mechanical vibrations of the particles of a gaseous medium.

Therefore, acoustic involves the study of mechanical waves and the mediums through which they travel.

the answers B,mechanical waves

A living thing is called?

Answers

The most scientific word I can think of is an organism.

A living thing is known as an organism, and is also called a biotic factor within an ecosystem. Nonliving things are known as abiotic, or without life :)

A person is rowing across the river with a velocity of 4.5 km/hr northward. The river is flowing eastward at 3.5 km/hr (Figure 4). What is the magnitude of her velocity ( v ) with respect to the shore?

Answers

The magnitude of her velocity with respect to the shore will be 5.70 Km/h. The change of displacement with respect to time is defined as velocity.

What is velocity?

Velocity is defined as the change in displacement with respect to time. The quantity of velocity is a vector quantity. It is a component that is time-based. It is measured in meters per second.

The given data in the problem is;

Q is the magnitude of Velocity of the boat = 4.5 km/hr

P is the magnitude of Velocity of the river flowing = 3.5 km/hr

R is the resultant of velocity P and Q=?

θ is the angle between the two velocities = 90°

From the law of vector addition;

$\rm R= √(P^2+Q^2+2PQcos\theta) \n\n \rm R= √((3.5)^2+(4.5)^2+2* 3.5 * 4.5 cos90^0) \n\n \rm R=5.70 \ m/sec$

Hence the magnitude of her velocity with respect to the shore will be 5.70 Km/h.

To learn more about the velocity refer to the link;

brainly.com/question/862972

Answer: The magnitude of her velocity ( v ) with respect to the shore is 5.70 km/h.

Explanation:

Magnitude of Velocity of the boat = Q

Magnitude of Velocity of the river flowing = P

R = Resultant velocity due to velocity of boat and velocity of river.

Applying Law of triangles of vector addition :

$R=√(P^2+Q^2+2PQCos\theta)$

From the figure attached:

P = 3.5 k/h, Q = 4.5 km/h

$\theta= 90^o$

$R=√(P^2+Q^2+2PQCos\theta)=√((3.5)^2+(4.5)^2+3.5* 4.5* cos90^o)=5.70$

$(Cos90^o=0),(sin 90^o=1)$

$\alpha =tan^(-1)(Qsin\theta)/(P+Qcos\theta)=tan^(-1)(4.5 sin 90^o)/(3.5+4.5 cos90^o)=tan^(-1)(4.5)/(3.5)=52.12^o$

The magnitude of her velocity ( v ) with respect to the shore is 5.70 km/h.

Most radiation is released as particles. Identify the type radiation that is not a particle.1.alpha
2.beta
3.gamma
4.positron

Answers

Gamma rays because it is a form of electromagnetic radiation. It has zero mass and no charge.

Galileo conducted controlled experiments to find out if the mass of the pendulum bob affected the period of the swing. Write a description of how he might design his experiment. Thanks!

Answers

According to my guesses, he should have swung the pendulam bob and noted its time period. In order to observe the effect of mass, he would have repeated the experiment with varied pendulam bobs. Hope this helped!

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