Plss help with my science

Answer:

Since the car comes uniformly to a stop, the force that acts on the vehicle is the net force whose magnitude is equal to 1320 N.

Explanation:

The force acting on the vehicle is given:

\( F = ma \)

Where:

m: is the mass = 1100 kg

a: is the acceleration = -1.2 m/s²

We can find the magnitude of the net force:

\( F = ma = 1100 kg*1.2 m/s^{2} = 1320 N \)

Since the car comes uniformly to a stop, the force that acts on the vehicle is the net force calculated above.        

I hope it helps you!                                                

Answer: its d because it said net force meaning the sum of the forces equaling to d

Explanation:

Answer:

The velocity of the wave is, v = 180,000 m/s

Explanation:

Given data,

The frequency of the wave, f = 900 Hz

The wavelength of the wave, λ = 200 m

The formula for the speed of the wave when the frequency and wavelength are known,

                               v = λ x f

Substituting the given values in the above equation,

                               v = 200 m x 900 Hz

                                v = 180000 m/s

Hence, the velocity of the wave is, v = 180,000 m/s

Answer:

Answer: The thermal speed of hydrogen molecules at 800K is 3.16 kM/sec .

Explanation:

(Open Answer Link):

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Answer:

Explanation:

Gimen:

M  (H₂) =  0.002 kg/mol

T = 800 K

_____________

V - ?

Root mean square speed:

\(V = \sqrt{\frac{3RT}{M} } =\sqrt{\frac{3*831*800}{0.002} } =3160 m/s\)

Bohr's model helped to explain how electrons could only change orbits by exchanging or absorbing energy in fixed quanta.

For instance, if an electron jumps into an orbit that is one orbit closer to the nucleus, it will have to expel energy equal to the energy difference between the two orbits.

A small positively charged nucleus is encircled by rotating negatively charged electrons in set orbits, according to the Bohr Atomic Model.

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Answer:

a. Acceleration, a = 0.28 m/s²

b. Distance, S = 156 meters

Explanation:

Given the following data;

Initial velocity = 30 km/h

Final velocity = 45 km/h

Time = 15 seconds

a. To find the acceleration;

Conversion:

30 km/h to m/s = 30*1000/3600 = 8.33 m/s

45 km/h to m/s = 45*1000/3600 = 12.5 m/s

Mathematically, acceleration is given by the equation;

\(Acceleration (a) = \frac{final \; velocity - initial \; velocity}{time}\)

Substituting into the equation;

\(a = \frac{12.5 - 8.3}{15}\)

\(a = \frac{4.2}{15}\)

Acceleration, a = 0.28 m/s²

b. To find the distance travelled, we would use the second equation of motion given by the formula;

\( S = ut + \frac {1}{2}at^{2}\)

Where;

S represents the displacement or height measured in meters.

u represents the initial velocity measured in meters per seconds.

t represents the time measured in seconds.

a represents acceleration measured in meters per seconds square.

Substituting into the equation, we have;

\( S = 8.3*15 + \frac {1}{2}*(0.28)*15^{2}\)

\( S = 124.5 + 0.14*225\)

\( S = 124.5 + 31.5 \)

S = 156 meters

Answer:

The time you enjoy wasting, is not wasted time

Explanation:

It's not a wasting time.

Answer:

I believe the answer would be kinetic energy to thermal energy.

Explanation:

Thermal energy is the heat of the brakes, and the kinetic energy would be when the car is in motion before stopping.

The full effect of global warming may not be evident for a generation. The correct option is (B).

This sentence is discussing the potential consequences of global warming and how long it may take for them to become fully apparent.

The correct word to use in this context is "effect" rather than "affect," as "effect" refers to the result or outcome of something, while "affect" refers to the influence or impact that something has on something else.

The word "full" indicates that the sentence is referring to the complete or total effect of global warming, rather than just a partial effect.

The phrase "may not be evident for a generation" suggests that it may take several decades for the full impact of global warming to be observed, indicating the long-term nature of the issue.

Overall, the sentence emphasizes the need for urgent action to address global warming, as its effects may not be fully understood until it is too late to prevent them.

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As the distance between charged tape and charged rod decreases, the force of interaction between them increases.

The force of interaction between the charged tape and charged rod is governed by Coulomb's Law.

This law states that the force between two charged objects is directly proportional to the product of their charges and inversely proportional to the square of the distance between them.

So, as the distance between the charged tape and charged rod decreases, the force of interaction increases.

This is because the charges on the objects are now closer to each other, allowing for a stronger attraction or repulsion, depending on the nature of the charges (like charges repel, opposite charges attract).

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a) Sketch the plate shape: we get a shape that resembles a trapezoid.

The plate shape is determined by the lines y = 2 - x² and y = 2x - 1. To sketch the plate shape, we can plot these two lines and shade the region in between them. The intersection points of the lines are found by solving the equations simultaneously:

2 - x² = 2x - 1

Simplifying, we get:

x² + 2x - 3 = 0

Factoring, we have:

(x - 1)(x + 3) = 0

So, x = 1 and x = -3. Plugging these values into the equations of the lines, we find the corresponding y-values:

For x = 1:

y = 2 - (1)² = 1

For x = -3:

y = 2(-3) - 1 = -7

Plotting these points and connecting them with the lines, we get a shape that resembles a trapezoid.

b) Total charge through the double integral:

To find the total charge Q, we need to integrate the charge density p(x, y) over the entire plate. We can express this as a double integral:

Q = ∬ p(x, y) dA

c) Reducing the double integral to repeated integrals: The limits of integration for x are the values of x that define the boundaries of the plate shape, which are -3 to 1.

Since the plate shape is described by the lines y = 2 - x² and y = 2x - 1, we can rewrite the double integral as a repeated integral by integrating with respect to x and y separately:

Q = ∫∫ p(x, y) dy dx

The limits of integration for y are from the lower curve y = 2 - x² to the upper curve y = 2x - 1. The limits of integration for x are the values of x that define the boundaries of the plate shape, which are -3 to 1.

d) Calculating the integral: The total charge Q of the thin plate is approximately 12.4 mC.

Now, we can evaluate the double integral to find the total charge Q:

Q = ∫(-3 to 1) ∫(2 - x² to 2x - 1) x²y dy dx

Performing the inner integral with respect to y first, we get:

Q = ∫(-3 to 1) [x²(y²/2 - y)] from 2 - x² to 2x - 1 dx

Simplifying the inner integral, we have:

Q = ∫(-3 to 1) [(x²/2)(2 - x²) - x²(2x - 1)] dx

Expanding and simplifying further, we get:

Q = ∫(-3 to 1) (x² - x⁴/2 - 4x³ + 2x²) dx

Integrating term by term, we have:

Q = [x³/3 - x⁵/10 - x⁴ + 2x³/3] from -3 to 1

Evaluating the integral at the limits, we get:

Q ≈ 12.4 mC (rounded to five significant figures)

Therefore, the total charge Q of the thin plate is approximately 12.4 mC.

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Answer: D

Explanation:

Answer:

I think it is protection

Answer:

I think it might be PROTECTION but i not sure for a fact

Sorry if i get it wrong ;]

Explanation:

Answer:420ms^-1

Conserving linear momentum (mv)=(MV)

Answer:

B, A, C

Explanation:

The momentum is equal to the mass times the velocity, so for each car the momentum is equal to

Car A

Momentum = Mass x Velocity

Momentum = 1,500 kg x 10 m/s

Momentum = 15,000 kg m/s

Car B

Momentum = Mass x Velocity

Momentum = 1,500 kg x 25 m/s

Momentum = 37,500 kg m/s

Car C

Momentum = Mass x Velocity

Momentum = 1,000 kg x 10 m/s

Momentum = 10,000 kg m/s

Then, the decreasing momentum is B, A, C because

37,500 is greater than 15,000 and 15,000 is greater than 10,000

So, the answer:

B, A, C

Answer:

8.22m

Explanation:

As interpreted from this problem, the angle of launch is 90 degrees as it is thrown straight up. Given an angle launch of 90°, upward initial velocity of 12.7m/s, and initial height of 0m. A much simpler equation can be used to find the maximum height.

\(h_{max} = h_ {0} + \frac{{v_0}^{2} }{2g}\)

this means that the max height is equal to the initial height plus the initial velocity squared divided by 2 times the acceleration of earth's gravity(≈9.8m/s^2 or 10m/s^2 depending on how you fix it).

when substituted into the equation, you should get.

(9.8m/s^2)

hmax = 0 + ((12.7)^2)/(2*9.8)

hmax = 161.29/19.6 ≈ 8.22

hmax = 8.22m

Given,

The current, I=0.25 A

The total charge flowing in the circuit is q=6812 C.

The electric current can be defined as the time rate of flow of the charges.

Thus, the electric current is given by,

Where t is the time duration.

Thus the batteries will fry out after 27248 s

Answer:

P=mgh

P=mghm=55

P=mghm=55g=9.8 or ~10

P=mghm=55g=9.8 or ~10h=27

Explanation:

hope it will help you have a great day bye and Mark brainlist if the answer is correct

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#carry on learning

Answer:

Clockwise

Explanation:

All of the planets rotate the same way around the sun.

Answer:

kinetic or mechanical cant remember

Explanation:

Answer:

Hey!!

Kinetic Energy is your answer!

Explanation:

I hope this helped you!

Answer:

We can float in space.

Explanation:

We can float in space because of gravity. Gravity is the force that attracts anything towards the centre of earth. We can stand, walk because of gravity. Even if we jump, we return to the ground because of gravity. In space, there is no gravity. That's why, we can't walk in space and everything floats there.

Answer:

Not all of the time, it can also depend on the strength of the magnet.

Explanation:

say you have a small very strong magnet, that might work just as well as a large but week magnet.

Answer:

in case of a car crash they will prevent you from flying out of your seat (not litteraly) and keep you safer than what you would be without them!

Explanation:

to keep you safe (simple answer lol)

Answer:

fiber optics props

Explanation:

Answer:

atoms

Explanation:

they are the smallest

The resultant distance of the vector is 12.1 m and the angle between two vectors are 48.4°. So the x-component of this vector is, Aₓ = 8.0335 m

Vector is a product that means a parameter has two types of property one is value second is direction. If a parameter has both then it called a vector quantity. Example: Velocity.

To calculate the vector we know first this is a proper vector quantity or not. According to the question, this is a vector quantity. So it has two component, one along x axis another is y axis as shown in the picture.

We have to calculate the x-component, so we are using the formula is,

Aₓ = Acosθ

Here we are given,

A = The resultant distance of the vector = 12.1 m

θ= The angle between two vectors = 48.4°.

Now We have to calculate the x-component = Aₓ

Now we put the known values in the above equation, we get

Aₓ = Acosθ

Or, Aₓ = 12.1*cos(48.4°)

Or, Aₓ = 8.0335 m

According to the calculation we get, the x-component of this vector is, Aₓ = 8.0335 m

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Answer:

Explanation:

hey the top of me tried there hardest to find you all a answer instead of saying the person who posted this left a blank so what its just a blank stop being so rude to them they are just trying to help and they helped me on my work that i done so don't be so rude because there just trying there hardest!! :)

Answer:

\( \boxed{R = 20\Omega} \)

Given:

Voltage (V)= 6.0 V

Current (I) = 0.3 A

Explanation:

Ohm's law states that voltage is directly proportional to current.

\(V \propto I \: or \: V = IR\)

R is proportionality constant known as Resistance.

So,

\( = > R = \frac{V }{ I} \\ \\ = > R = \frac{6.0}{0.3} \\ \\ = > R = 20\Omega \)

If the voltage is 6.0V and the current 0.3A, then the resistance is 20 ohms.

Ohm's law is a fundamental law of physics that describes the relationship between electric current, voltage, and resistance in a circuit. It states that the current through a conductor between two points is directly proportional to the voltage across the two points and inversely proportional to the resistance between them.

Mathematically, Ohm's law is expressed as:

I = V/R

where I is the current flowing through the circuit, V is the voltage applied across the circuit, and R is the resistance of the circuit.

This law holds true for a wide range of electrical conductors, including metals, semiconductors, and electrolytes. The law also states that the resistance of a conductor remains constant as long as the temperature, pressure, and other physical factors remain constant.

Ohm's law is an essential principle in the study of electrical circuits and is used to analyze and design circuits for various applications. It is also used in the design of electrical components such as resistors, capacitors, and inductors.

Here in the Question,

To find the resistance, we can use Ohm's Law which states that resistance (R) is equal to the voltage (V) divided by the current (I):

R = V / I

Plugging in the given values, we get:

R = 6.0V / 0.3A

R = 20 ohms

Therefore, the resistance is 20 ohms.

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Answer:

A) 12.57 m

B) 5 RPM

C) 3.142 m/s

Explanation:

A) Distance covered in 1 Revolution:

The formula that gives the relationship between the arc length or distance covered during circular motion to the angle subtended or the revolutions, is given as follows:

s = rθ

where,

s = distance covered = ?

r = radius of circle = 2 m

θ = Angle = 2π radians  (For 1 complete Revolution)

Therefore,

s = (2 m)(2π radians)

s = 12.57 m

B) Angular Speed:

The formula for angular speed is given as:

ω = θ/t

where,

ω = angular speed = ?

θ = angular distance covered = 15 revolutions

t = time taken = 3 min

Therefore,

ω = 15 rev/3 min

ω = 5 RPM

C) Linear Speed:

The formula that gives the the linear speed of an object moving in a circular path is given as:

v = rω

where,

v = linear speed = ?

r = radius = 2 m

ω = Angular Speed in rad/s = (15 rev/min)(2π rad/1 rev)(1 min/60 s) = 1.571 rad/s

Therefore,

v = (2 m)(1.571 rad/s)

v = 3.142 m/s