Which statements apply to compressional waves? Choose more than one answer. Similar to ocean waves Cause molecules to vibrate Travel through outer space Travel through air, liquid, or solid Move in the same direction as energy flow Move at right angles to the direction of energy flow

Answer:

Q  =  mc(θ₂-θ₁)

47 calories =  10 g *c*(50.4 - 25)

47cal = 10*c* 25.4

47 /(10*25.4) = c

0.185 = c

Specific heat of iron = 0.185 cal/g°C

Explanation:

Answer:

Robert Oppenheimer made the first atomic bomb.

Answer:

one is Atmospheric and one is a Liquid

Explanation:

Answer:

Option b is correct: 4.1 s

Explanation:

Vertical Launch

An object launched thrown vertically upward where air resistance is negligible, reaches its maximum height in a time t, given by the equation:

[tex]\displaystyle t=\frac{v_o}{g}\qquad\qquad[1][/tex]

Where vo is the initial speed and g is the acceleration of gravity g=9.8 [tex]m/s^2[/tex].

Once the object reaches that point, it starts a free-fall motion, whose speed is (downward) given by:

[tex]v_f=g.t\qquad\qquad[2][/tex]

The object considered in the question is thrown with vo=25 m/s. The time taken to reach the maximum height is given by [1]:

[tex]\displaystyle t=\frac{25}{9.8}=2.551\ sec[/tex]

The object starts its falling motion and at some time, it has a speed of vf=15 m/s. Let's find the time by solving [2] for t:

[tex]\displaystyle t=\frac{15}{9.8}=1.531\ sec[/tex]

The total time taken by the object to go up and down is

[tex]t_t=2.551\ s+1.531\ s=4.081\ s[/tex]

a. This option is incorrect because it's far away from the answer.

d. This option is incorrect because it's far away from the answer.

b. This option is correct because it's a good approximation to the calculated answer.

e. This option is incorrect because it's far away from the answer.

c. This option is incorrect because it's far away from the answer.

Answer:

4500 N

Explanation:

Acceleration = 10 m/s²

Mass = 450 kilograms

Force = ?

[tex]force \: = mass \times acceleration \: \\ force \: = 450 \times 10 \\ force = 450[/tex]

Force = 450 Newton

Answer:

acceleration=0.111 m/s²

Explanation:

acceleration = change in velocity/time taken

1/9=0.1111

acceleration=0.111 m/s²

Answer:

5.89 m/s

Explanation:

Given:

Δy = 1.77 m

v₀ = 0 m/s

a = 9.8 m/s²

Find: v

v² = v₀² + 2aΔy

v² = (0 m/s)² + 2 (9.8 m/s²) (1.77 m)

v = 5.89 m/s

Answer:

scale and balance

Explanation:

Answer:

scale and balance

please follow me

Answer:

48

Explanation:

we know that

v^2=u^2+2as

18^2=6^2+2*3s

324=36+6s

6s=324-36

6s=288

s=48

plz markbas brainalist

The weight of a rock with a mass of 3.6 kilograms will be 35.3 N. The weight of matter is found as the product of the mass and the gravitational acceleration.

Mass is a numerical measure of inertia, which is a basic feature of all matter. It is, in effect, a body of matter's resistance to a change in speed or position caused by the application of a force.

In the International System of Units (SI), the kilogram is the unit of mass.

The given data in the problem is;

The weight of a rock is,[tex]\rm W[/tex]

The mass of rock is,[tex]\rm m= 3.6 \ kilograms[/tex]

The weight of matter is found as the product of the mass and the gravitational acceleration;

[tex]\rm W= mg \\\\ \rm W= 3.6 \times 9.81 \\\\ W=35.3 \ N[/tex]

Hence, the weight of a rock will be 35.3 N.

To learn more about the mass, refer to the link;

https://brainly.com/question/13073862

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Answer:

1.5*10^9

Explanation:

distance =V x T

=3x10^8x5

=1.5*10^9

Answer:

Explanation:

The momentum of an object can be found by using the formula

From the question

mass = 4 kg

velocity = 84 m/s

We have

momentum = 4 × 84

We have the final answer as

Hope this helps you

Answer:

spinal cord becuse it does all of the reflexes

Answer:

none of these

Explanation:

what actually controlls reflexes is the brain stem

The magnitude of the gravitational force acting on the car is 14700 N.

In mechanics, gravity, often known as gravitation, is the force of attraction that acts on all matter. It has little impact on determining the intrinsic characteristics of common stuff because it is by far the weakest known force in nature.

In contrast, it governs the formations and evolution of stars, galaxies, and the entire cosmos by its extensive and ubiquitous action, which affects the trajectories of objects in the solar system and beyond the universe.

In this free body diagram: 14700 N force acting downwards due to its weight. Hence, it is the magnitude of the gravitational force acting on the car.

Learn more about gravitational force here:

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Puck 1 after collision with Puck 2 moves towards the west with a speed of 11 m/s, so Puck 2 will move towards the east with a speed of 16 m/s. Hence, option B is correct.

A collision, also known as an impact, occurs when two entities, such as two pool pieces, a country club, and a ball, a mallet and a nail, two rail cars when joined, or a tumbling object and a floor, suddenly and violently collide in close proximity to one another. The consequence of the impact is affected by the force, the length of time the items are in contact, the materials the two objects are made of, and other factors. According to conventional knowledge, a high-strength steel ball will rebound almost to the same spot from which it was dropped, in contrast to a mud or lead ball.

All of the kinetic energy of the colliding bodies is lost in a fully elastic impact, while the loss of kinetic energy is greatest in a perfectly plastic impact.

Therefore, the velocity of Puck 2 is 16 m/s towards the east direction.

To know more about Collision :

https://brainly.com/question/13138178

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Explanation:

Given that the first ball is thrown vertically and upward.

since it reaches the throwers hand after 3 seconds, then the time taken to reach maximum height is

= T/2

=3/2

=1.5 seconds

Also, the projection angle for the second ball is 30°

we know that at maximum height vertical velocity is 0

therefore the final velocity of the first ball is

Vy= 0

Also, since the first ball is thrown upward the horizontal velocity is 0

Vx=0

from the first law of motion

Vy=u+at

Vy=0, a= -g

Uy=gt

Uy=9.81*1.5

Uy=14.7m/s

since both reach the same height, they will have the same vertical velocity

Uy= Vo sin∅

Vo=Uy/sin∅

Vo= 14.7/sin 30

Vo=29.4m/s

Answer:

I think 1. is 17 and 2. is 600

Explanation:

sorry its been a while..

Answer:

Explanation:

The polarization characteristics depend on the shape, size, and optical properties of the surface particles. Generally, the radiation is linearly polarized and is said to be negatively polarized if it lies in the scattering plane and positively polarized if it is perpendicular to the scattering plane.

Answer:

4.0 km

Explanation:

Total distance traveled doesn't care about direction:

Total distance traveled = 2.7km + 1.3 km = 4.0 km

Answer:

the objects mass is independent of its acceleration in free fall

The acceleration of the object equals the gravitational acceleration. The mass, size, and shape of the object are not a factor in describing the motion of the object. So all objects, regardless of size or shape or weight, free fall with the same acceleration.

Answer:

10g

Explanation:

As the Law of Conservation of Mass states that " Mass can neither be created nor be destroyed in a chemical reaction".

Though melting of tin isn't a chemical change, the same logic is applied here...

Hence,

The mass of tin will be 10 g itself...

Answer:

10g

Explanation:

The experiment is about melting of tin. When solid tin is melted, it retains the amount of substance it originally has and we expect it to still be 10g.

Mass is the quantity or amount of matter contained in a substance. For most chemical processes, the law of conservation of matter is always succinctly observed.

The law states that "matter is neither created nor destroyed in a chemical reaction or process". Although melting is a phase change, we can adapt this law to the process. Owning to no loss of matter in the melting procedure, the amount of substance remains the same.

Therefore, we are left with about the same mass of substance we started with which is 10g.

Answer:

B

Explanation:

Answer:

It is a change in velocity over a period of time.

Explanation:

Answer:

I believe your answer would be B. point y

Answer:

[tex]28.53\ \text{m}[/tex]

[tex]4.48\ \text{s}[/tex]

[tex]72.1\ \text{m}[/tex]

Explanation:

[tex]y_0[/tex] = Height from where the ball is thrown = [tex]70\ \text{m}[/tex]

[tex]\theta[/tex] = Angle of inclination = [tex]45^{\circ}[/tex]

[tex]u[/tex] = Initial velocity = [tex]9\ \text{m/s}[/tex]

[tex]g[/tex] = Acceleration due to gravity = [tex]9.8\ \text{m/s}^2[/tex]

Range of projectile is given by

[tex]R=\dfrac{u\cos \theta }{g}\left(u\sin \theta +{\sqrt{u^{2}\sin ^{2}\theta +2gy_{0}}}\right)\\\Rightarrow R=\dfrac{9\cos45^{\circ}}{9.8}\left(9\sin45^{\circ}+\sqrt{9^2\left(\sin45^{\circ}\right)^2+2\times 9.8\times 70}\right)\\\Rightarrow R=28.53\ \text{m}[/tex]

The ball will land [tex]28.53\ \text{m}[/tex] away.

Time of flight is given by

[tex]t=\dfrac{u\sin \theta +{\sqrt{(u\sin \theta )^{2}+2gy_{0}}}}{g}\\\Rightarrow t=\dfrac{9\sin 45^{\circ} +{\sqrt{(9\sin 45^{\circ} )^{2}+2\times 9.8\times 70}}}{9.8}\\\Rightarrow t=4.48\ \text{s}[/tex]

The time the ball will stay in the air is [tex]4.48\ \text{s}[/tex]

Maximum height is given by

[tex]h=y_0+\dfrac{u^2\sin^2\theta}{2g}\\\Rightarrow h=70+\dfrac{9^2\times \sin^245^{\circ}}{2\times 9.8}\\\Rightarrow h=72.1\ \text{m}[/tex]

Maximum height the object will reach above the ground is [tex]72.1\ \text{m}[/tex].

Answer:

a = 40 [m/s^2]

Explanation:

This problem can be solved using Newton's second law which tells us that the sum of forces acting on a body must be equal to the product of mass by acceleration.

F = m*a

where:

m = mass = 0.4 [kg]

F = force = 16 [N]

a = acceleration [m/s^2]

Now replacing we have:

16 = 0.4*a

a = 40 [m/s^2]

Answer:

b

Explanation:because think about it its going straight so you have to coiunt the miles the train is going and boom your answer is b

Answer:

It would be choice b

Explanation:

speed is constant so they value won't change, on the other hand time is always going.

Answer:

The dog has more momentum than the pony.

Explanation:

To solve this problem, we must remember the formula for calculating momentum, which is given below:

momentum = p = m*v

where m represents the mass of the object and v represents the velocity of the object

Using this knowledge, let's calculate the momentum for the dog and the pony.

Dog: p = m*v = (2kg)*(41 m/s) = 82 kg*m/s

Pony: p = m*v = (75kg)*(1 m/s) = 75 kg*m/s

Since 82 > 75, we can conclude that the dog has more momentum.

Hope this helps!