Please help me with all questions I will mark you brainly thank you

Answer:

v = 9.812 m/s

Explanation:

Given that,

The initia speed of a car, u = 6.5 m/s

Acceleration of the car, a = 0.92 m/s²

Time, t = 3.6 s

We need to find the final velocity of the car. Let the final velocity be v. Using equation of motion to find it as follows :

v = u +at

Putting all the values,

v = 6.5+(0.92)(3.6)

v = 9.812 m/s

So, the final velocity of the car is 9.812 m/s.

Answer:

Acceleration.

Explanation:

Seems like u don't have time for a explanation. :

Answer:

A. Displacement

Answer:

Down >3

Explanation:

Two small positively charged spheres have a combined charge of 5.0 × 10−5 C. If each sphere is repelled from the other by an electrostatic force of 1.0N Two small positively charged spheres have a combined charge of 5.0 × 10−5 C. If each sphere is repelled from the other by an electrostatic force of 1.0N

Answer: the ice cube to melt more quickly on the metal block than on the wooden block.

Explanation:

Answer:

Explanation:

x₁(2.0) = 4 m

x₂(4.0) = 7 m

x₃(13) = 9 m

x₄(17) = 0 m

Answer:

2/7

Explanation:

The Rotational Kinetic Energy is given as RKE = 1/2 * I * w², where

w = v/R and

I = 2/5mR²

The Translational Kinetic Energy is given as TKE = 1/2 * m * v²

RKE = 1/2 * 2/5mR² * (v/R)²

RKE = 1/2 * 2/5mR² * v²/R²

RKE = 1/5mv²

To get the ratio, we use the relation

RKE / (TKE + RKE)

and thus, we have

1/5mv² / (1/2mv² + 1/5mv²)

1/5mv² / 7/10mv²

1/5 ÷ 7/10

1/5 * 10/7

2/7

Therefore, the ratio of RKE to TKE is 2/7

Violet has the shortest wavelength and the lowest frequency.

When the entire spectrum of red visible light passes through a prism the wavelengths are separated into the colors of the rainbow because each color is a different wavelength. Violet has the shortest wavelength at about 380 nanometers and red has the longest wavelength at about 700 nanometers.

Visible light travels at 300,000 km/s and can be separated into 7 colors. From the longest wavelength, they are red, orange yellow green blue indigo, and violet. To clarify color is the eye's perception of different wavelengths of electromagnetic light. When it comes to visible light, the color with the highest frequency violet also has the highest energy. The lowest frequency of visible light red has the lowest energy.

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Answer:

Work down = 2.94 N

Explanation:

Given:

Mass of book m = 3 kg

Initial speed v = 1.4 m/s

Find:

Work down w

Computation:

Work down = Kinetic energy

SO,

Work down = 1/2(m)(v)²

Work down = 1/2(3)(1.4)²

Work down = 2.94 N

Answer:

B) Schizophrenia

Explanation:

Hope this helps!

Answer:

B. Fog forms in a valley.

Explanation:

Answer: i've done the same thing before kinda but anyway use this website that was recommended to me by a teacher https://www.britannica.com/science/mica (i got an A btw)

Answer:

km = 3.24

m = 3,240

dm = 32,400

Explanation:

km = 1000m

m = 10dm

Explanation:

take a look carefully hope it will help u

Answer:

I think it's really cool

Answer:

Magnitude: [tex]\|\vec v\| = 5\sqrt{6}[/tex], Direction (unitized): [tex]\vec u = \frac{\sqrt{6}}{6}\,\hat{i} + \frac{11\sqrt{6}}{12}\,\hat{j}+\frac{5\sqrt{6}}{12}\,\hat{k}[/tex]

Explanation:

Let [tex]\vec v = a\,\hat{i}+b\,\hat{j}+c\,\hat{k}[/tex]. The magnitude of the vector is represented by the Pythagorean formula:

[tex]\|\vec v\| = \sqrt{a^{2}+b^{2}+c^{3}}[/tex] (1)

And the direction is represented by the direction cosines, measured in sexagesimal degrees, that is:

[tex]\theta_{x} = \cos^{-1} \frac{a}{\|\vec v\|}[/tex] (2)

[tex]\theta_{y} = \cos^{-1} \frac{b}{\|\vec v\|}[/tex] (3)

[tex]\theta_{z} = \cos^{-1}\frac{c}{\|\vec v\|}[/tex] (4)

If we know that [tex]a = 2[/tex], [tex]b = 11[/tex] and [tex]c = 5[/tex], then the magnitude and directions of the vector are, respectively:

[tex]\|\vec v\| = \sqrt{2^{2}+11^{2}+5^{2}}[/tex]

[tex]\|\vec v\| = 5\sqrt{6}[/tex]

The direction can be represented by the following unit vector:

[tex]\vec u = \frac{\vec v}{\|\vec v\|}[/tex] (5)

[tex]\vec u = \frac{2\,\hat{i}+11\,\hat{j}+5\,\hat{k}}{2\sqrt{6}}[/tex]

[tex]\vec u = \frac{\sqrt{6}}{6}\,\hat{i} + \frac{11\sqrt{6}}{12}\,\hat{j}+\frac{5\sqrt{6}}{12}\,\hat{k}[/tex]

Answer:

76.2 billion

Explanation:

73.0 + 3.20 billion = 76.2 billion

Answer:

Cheetah speed:

Its position at time t is given by

(1)

Gazelle speed:

the gazelle starts S0=96.8 m ahead, therefore its position at time t is given by

(2)

The cheetah reaches the gazelle when . Therefore, equalizing (1) and (2) and solving for t, we find the time the cheetah needs to catch the gazelle:

(2) To solve the problem, we have to calculate the distance that the two animals can cover in t=7.5 s.

Cheetah:

Gazelle:

So, the gazelle should be ahead of the cheetah of at least

Explanation: try these steps to answer

Hello!

[tex]\large\boxed{KE = 50J}[/tex]

Use the formula for kinetic energy:

[tex]KE = \frac{1}{2}mv^{2}[/tex]

Plug in the given mass and velocity:

[tex]KE = \frac{1}{2} (4)5^{2}[/tex]

Simplify:

[tex]KE = \frac{1}{2} (100)\\\\KE = 50 J[/tex]

Answer: 22 hours 15 minutes

Explanation: The calculated flying distance from New York City to Dallas is equal to 1371 miles which is equal to 2206 km. If you want to go by car, the driving distance between New York City and Dallas is 2492.32 km. If you ride your car with an average speed of 112 kilometers/hour (70 miles/h), travel time will be 22 hours 15 minutes.

Answer:

Explanation:

C

Answer: the sphere's inner radius is 4.21 cm so the Inner diameter is 8.42 cm

Explanation:

Given that;

mass m = 746 g

diameter d = 10.4 cm

radius r = 5.2 cm

density of aluminum = 2.7 g/cm³

we know that

density × volume = mass

P × 4/3π( r₀³ - ri³) = m

so we substitute

2.7 × 4/3π( 5.2³ - ri³) = 746

11.3097( 5.2³ - ri³) = 746

( 5.2³ - ri³) = 746/11.3097

140.608 - ri³ = 65.961

ri³ = 140.608 - 65.961

ri³ = 74.647

ri = ∛74.647

ri =  4.21 cm

the sphere's inner radius is 4.21 cm so the Inner diameter is 8.42 cm

The inner diameter of the aluminum sphere is 8.42 cm.

The given parameters;

The volume of the aluminum sphere is calculated as follows;

[tex]volume = \frac{mass}{density} \\\\volume = \frac{746}{2.7} \\\\volume = 276.3 \ cm^3[/tex]

The volume of the sphere from the given outer and inner diameter is calculated as;

[tex]V = \frac{4}{3}\pi r^3\\\\V = \frac{4}{3}\pi \times \frac{d^3}{8} \\\\V = \frac{1}{6} \pi d^3\\\\V = \frac{1}{6} \pi (d_o^3 - d_i^3)\\\\d_o^3 - d_i^3 = \frac{6V}{\pi} \\\\d_i^3 = d_0^3 - \frac{6V}{\pi} \\\\d_i^3 = (10.4)^3 - \frac{6(276.3)}{\pi} \\\\d_i^3 = 597.23\\\\d_i = \sqrt[3]{597.23} \\\\d_i = 8.42 \ cm[/tex]

Thus, the inner diameter of the aluminum sphere is 8.42 cm.

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The interval of acceleration of the bus will be 2.19 seconds.

An object is considered to have been accelerated if its velocity changes. Depending on whether an object is moving faster, slower, or in a different direction, its velocity may change.

Examples of acceleration include a falling apple, the moon orbiting the earth, and a car that has stopped at a stop sign. These examples demonstrate how acceleration occurs whenever a moving object modifies its direction, speed, or both.

Acceleration is a vector quantity.

SI unit of acceleration is m/s.

According to the question, the given values are :

Acceleration, a=-4.1 m/s²

Initial velocity, u=9.0 m/s and,

Final velocity, v=0 m/s

By using Equation of motion, i.e.,

v=u+at

⇒0 m/s=9m/s+(-4.1 m/s²)(t)

⇒-9 m/s=-4.1 m/s²×t

t=(-9 m/s)/(-4.1 m/s²)

t= 2.19 seconds.

Hence, the time interval of acceleration of the bus will be 2.19 seconds.

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Answer: All UV can have harmful effects on biological matter (such as causing cancers) with the highest energies causing the most damage.

Explanation:

[tex]We \: know \: that, \: c = λv \\ thus \: \: λ = \frac{c}{v} = \frac{3 \times {10}^{8} \: m {s}^{ - 1} }{94.7 \times {10}^{6} } \\ = 3.16789863≈3.17 \: m[/tex]

Hope this helps :)

Answer: anything that can change or be changed

Explanation: In other words, it is any factor that can be manipulated, controlled for, or measured in an experiment.

Answer:

Dependend variable or Independent variable

Explanation:

A variable is anything that can change or be changed. In other words, it is any factor that can be manipulated, controlled for, or measured in an experiment. Experiments contain different types of variables.

Answer:

Its graph 1

Explanation:

She started at the origin and kept riding her bike until she stopped which causes the line to go staright because she's not moving.

Answer:

4.16m/s²

Explanation:

According to Newtons second law;

[tex]\sum Fx = ma_x\\Fm - Ff = ma_x\\W sin\theta - \mu R cos \theta = ma_x\\mg sin\theta - \mu mg cos\theta = ma_x\\[/tex]

Fm is the moving force

[tex]\mu[/tex] is  the coefficient of kinetic friction between the child and the slide

m is the mass

g is the acceleration due to gravity

a is the acceleration of the child

Substitute the given values and get the acceleration as shown;

35(9.8)sin27.5 - 0.415(35)(cos27.5) = 35a

158.38-12.88 = 35a

145.49 = 35a

a = 145.49/35

a = 4.16m/s²

Hence the acceleration of the body is  4.16m/s²

Answer:

CELL DIVISION THAT INVOLVES MITOSIS AND CELL GROWTH DUE TO TAKING IN NUTRIENTS

Explanation:

Answer: Cell growth due to taking in nutrients and Cell growth due to fertilization​.

Explanation:

Answer:

The answer is a for Plato users.

Explanation:

Since the angle of the refracted ray moves away from the normal, it must be traveling in a faster medium.

Answer: Velocity Increases

Explanation: Plato

Given that,

Mass of student 1, m₁ = 90 kg

Mass of student 2, m₂ = 60 kg

Speed of student 1, v₁ = 5 m/s

To find,

The velocity of the other student.

Solution,

Using the conservation of momentum to find the velocity of the other student. Let it is v₂.

[tex]m_1v_1=m_2v_2\\\\v_2=\dfrac{m_1v_1}{m_2}\\\\v_2=\dfrac{90\times 5}{60}\\\\=7.5\ m/s[/tex]

So, the velocity of the other student is 7.5 m/s.

Answer:

The change in momentum is 28265.71  kg-m/s.

Explanation:

Given that,

Mass of a car, m = 877 kg

Initial velocity of the car, u = 0 (at rest)

Final velocity of the car, v = 116 km/h = 32.23 m/s

Time, t = 0.951 s

We need to find the change in momentum produced by the force. It can be calculated as the difference of final momentum and the initial momentum.

[tex]\Delta P=m(v-u)\\\\=877\times (32.23-0)\\\\=28265.71\ kg-m/s[/tex]

So, the change in momentum is 28265.71  kg-m/s.