ik its a lot but can u help
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Answer:

I think there's a pdf for the questions you need

WorksheetKineticVsPotentialEnergy.pdf

Explanation:

Answer:

actual frequency produced by the source of sound

Explanation:

According to Oxford dictionary; Doppler effect is"an increase (or decrease) in the frequency of sound, light, or other waves as the source and observer move towards (or away from) each other."

The actual change in frequency of a wave is called the Doppler shift. The Doppler shift is caused by a constant relative motion between the source of the wave and the observer. This leads to a change in the observed frequency of the wave.

Answer:

Snell's law of refraction also known as the second law of refraction which states:

The ratio of the sine of the angle of incidence to the sine of the angle of refraction is a constant or given pair of Media .

Here, the hydrogen atoms are combined to form a helium atom, and during this process of fusion, a significantly large amount of energy is released. Thus, stars produce a large amount of energy by forming helium from the combination of hydrogen in its core. Hence, the correct answer is option (C).

Answer:

A. Creating helium from hydrogen in its core.

Explanation:

Sacrificed my grade for points I hope it helps

Answer:

48 million people get sick, 128,000 are hospitalized, and 3,000 die

Explanation:

Answer:

48 million is get sick from consuming contaminated food/water each 6ear

When light passes through one transparent medium to another transperent medium it bends and that beding of light is know as refraction of light !

Answer:

false

Explanation:

Answer:

true

Explanation:

Space is not a medium. and we can not her anything in space. therefore you need a medium in order to hear sound waves.

Answer:

"42 m/s" is the appropriate answer.

Explanation:

Given:

Initial speed of Ball 1,

= 14 m/s

Now,

If the initial speed of ball 1 is doubled, then the speed of ball 2 will be:

⇒ [tex](V_{fx})_2=\frac{2m_1}{m_1+m_2}(v_1x_1)[/tex]

hence,

Doubling ([tex]v_1x_1[/tex]) will double [tex](V_{fx})_2[/tex],

⇒ [tex](V_{fx})_2=2\times 21[/tex]

              [tex]=42 \ m/s[/tex]

Answer:

1) a ray parallel to the optical axis that after passing through the lens passes through the focal length

2) a ray that passes through the center of curvature, this ray does not have any deviation

real image   d_{objet} > f

Explanation:

In geometric optics, you can find the position of the image by geometric method, we draw two rays

1) a ray parallel to the optical axis that after passing through the lens passes through the focal length

2) a ray that passes through the center of curvature, this ray does not have any deviation

3) a ray that passes through the focal length and when passing the lens comes out horizontally

The interceptor point is where the image is

To determine if the image is real or virtual, when the object is at a greater distance than the focal length, the image is real and when it is at a shorter distance, the image is virtual.

The virtual image is formed on the same side as the object

real image   d_{objet} > f

Answer:

464.1 km

Explanation:

Using R = u²sin2Ф/g where R = range of projectile, u = muzzle speed = 2.20 km/s = 2.20 × 10³ m/s, Ф = angle of elevation or projection angle = 55° and g = acceleration du° to gravity = 9.8 m/s²

Substituting the values of the variables into the equation, we have

R = u²sin2Ф/g

R = (2.20 × 10³ m/s)²sin2(55°)/9.8 m/s²

R = 4.84 × 10⁶ m²/s²sin110°/9.8 m/s²

R = 4.84 × 10⁶ m²/s² × 0.9397/9.8 m/s²

R = 4.548 × 10⁶ m²/s²/9.8 m/s²

R = 0.4641 × 10⁶ m

R = 464.1 × 10³ m

R = 464.1 km

Answer:

3.504 MeV

Explanation:

Given that;[tex]\frac{A}{Z} X ---->\frac{A-4}{Z-2} Y +\alpha + Q[/tex]

Also;

[tex]Q= KE_{\alpha } (M_{Y} + M_{\alpha } /M_{Y[/tex])

Mass number of X = 229

Mass number of Y = 225

Mass number of alpha particles = 4

Kinetic energy of alpha particles = 3.443 MeV

Q = 3.443 MeV (225 + 4/225)

Q= 3.504 MeV

Answer:

Explanation:

edge

Answer:

Sound is transmitted by longitudinal waves thru air - the observer cannot hear the explosion because no air is present between the moon and the ship

Light is transmitted by electromagnetic waves so the light from the explosion can travel between the  moon and the observer.

C) South

As we know that, north is considered as negative, and south as positive. Now, the charge on particle is negative; so, when we will release it, it will move towards the south.

In the scenario where the negatively charged particle is placed in a uniform electric field, the direction will be C. South.

It should be noted that an electric field simply means the physical field which surrounds electrically charged particles.

Since the negatively charged particle is placed in a uniform electric field directed from South to North, the direction that the particle move after it is released is South.

Learn more about electric field on:

https://brainly.com/question/14372859

Answer:

B = 25°

C = 65°

D = 25°

Explanation:

The given parameters are;

The orientation of the two mirrors = At right angle to each other

The laser light is directed at one of the mirror

The measure of angle, A = 25°

The measures of angle B, C, and D are found as follows;

We have;

∠A = ∠B = 25°, by angle of incidence equals angle of reflection

∠B = 25°

∠B + ∠C = 90° by sum of the acute angles of a right triangle

25° + ∠C = 90°

∴ ∠C = 90° - 25° = 65°

∠C = 65°

∠E = ∠C = 65° by angle of incidence equals angle of reflection

∴ ∠E = 65°

Line 'L' is perpendicular to the second mirror, therefore, the angle between line 'L' and the second mirror = 90° = ∠E + ∠D

∠E + ∠D = 90°,  by angle sum property

Therefore;

65° + ∠D = 90°

∴ ∠D = 90° - 65° = 25°

∠D = 25°

Answer:

what is the question? there isn't one

Answer:

the types of force shown in the picture is

balanced force.

Answer:

10.

parabolic

11.

Entirely horizontal

12.

45°

Answer:

To obtain fair results

Explanation:

if we don't measure the results might give unfair results

Answer:

Accurate measurement s r important bcz precise amounts r required for reaçtiøñ#s tø take place før a recipe tø turn out ãnd tø keep correct records of A measurement

Answer: [tex]10.42\ m/s[/tex]

Explanation:

Given

Usain Bolt ran the race with a length [tex]200\ m[/tex]

Time is taken to complete it [tex]t=19.19\ s[/tex]

We know, [tex]\text{Distance}=\text{speed}\times \text{time}[/tex]

Insert the values

[tex]\Rightarrow 200=v\times 19.19\\\\\Rightarrow v=\dfrac{200}{19.19}\\\\\Rightarrow v=10.42\ m/s[/tex]

So, the speed of Usain Bolt is [tex]10.42\ m/s[/tex]

Answer:

Explanation:

Angular momentum is L = mvr:

L = (5.2)(1.8)(.86) so

L = 8.05 kg*m/s

Answer:

hope it helps you see the attachment for further information

Answer: "People will say the length of a day is determined by just the rotation rate of a planet, but that isn’t entirely true. The orbit around its sun also factors in. What we define as a day is the time between when the Sun is highest in the sky until the next time the Sun is at the highest point in the sky. This isn’t just the time it takes the Earth to rotate once on its axis, though. This is because, as the Earth is rotating, it’s also moving relative to the Sun"

Answer:

Explanation:  

Answer:

B - Person A's chair rolls backwards.

Explanation:

This can be seen simply through the Conservation of Momentum. When the ball is thrown to be, the ball's momentum(+m) is transfererd to B, so B's chair moves forward(think about it - it makes sense, doesn't it?), meaning A's chair moves backwards.

So, B.

EXTRA TIP: Try drawing a diagram to help you!  

Answer:

From Ohms Law

V=IR

V=5volts

R=33.0hms

I=V/R

I= 5/330

=0.0152A

The current flowing through the cross-section of the resistor is 0.0152A.

Given the data in the question;

Ohm's law states that "the current flowing through the cross-section of a conductor is directly proportional to the voltage across it".

It is expressed as;

[tex]V = IR[/tex]

Where V is voltage, I is current and R is the Resistance.

To determine the current flowing through the resistor, we substitute our given values into the expression above.

[tex]V = IR\\\\I = \frac{V}{R}\\ \\I = \frac{5.00V}{330\ Ohm} \\\\I = 0.0152A[/tex]

Therefore, the current flowing through the cross-section of the resistor is 0.0152A.

Learn more about Electric current here: https://brainly.com/question/2264542

Answer:

When the circuit breaker trips and turns off, it can shut off power to the appliance. This not only protects your home from damage, but it also protects the appliance itself.

Explanation:

What is a circuit breaker. A circuit breaker is an electrical switch designed to protect an electrical circuit from damage caused by overcurrent/overload or short circuit. Its basic function is to interrupt current flow after protective relays detect a fault.

P = W / t

2000 = 30000 / t

t = 30000/2000

t = 30/2

t = 15 seconds

Explanation:

work(w)=30000J

power(p)=2000W

time taken(t)=?

now,

hope it helps.