Which of the following would be good to use to pick up a charged object?

(Check all that apply)

A. Wet cloth gloves B. Plastic tongs C. Rubber gloves D. Metal tongs

Aaron's car is moving at speed of 30 m/s

His reaction time is given as 0.7 s

but when he is tired the reaction time is doubled

Now we need to find the distance covered by his car when he is tired during the time when he react to apply brakes

So here since during this time speed is given as constant so we can say that distance covered can be product of speed and time

So here we can use

[tex]d = v*t[/tex]

[tex]d = 30 * 1.4[/tex]

[tex]d = 42 m[/tex]

So the car will move to 42 m during the time when he apply brakes

The chemical symbol of an element is determined by its name in English or Latin, with the first letter used to create a one or two-letter symbol. The symbols are standardized by IUPAC.

The chemical symbol of an element is determined based on its name in English or Latin. The first letter of the element's English or Latin name is used to create a one or two-letter symbol. If the symbol has two letters, the first letter is capitalized and the second letter is lowercase.

For example, the symbol for Hydrogen is H, Oxygen is O, Carbon is C, and Gold is Au. In some cases, symbols are derived from the element's Latin name, such as Sodium (Na) from Natrium and Potassium (K) from Kalium.

This system of chemical symbols was established by the International Union of Pure and Applied Chemistry (IUPAC) to provide a standardized representation for elements across different languages and countries.

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1. Define Newtons second law of motion (this will help put things into perspective)

2.Get the mass of the object (in this case 75 kg)

3.The net force acting on the object...find it (in this case 500 N)

4.Change the equation to F=ma (500=75a)

5.Divide both sides by 75 and that is the acceleration.

Answer:

Acceleration, [tex]a=6.66\ m/s^2[/tex]

Explanation:

Given that,

Force acting on the object, F = 500 N

Mass of the object, m = 75 kg

We need to find the acceleration of the object. The force acting on the object is given by :

[tex]a=\dfrac{F}{m}[/tex]

[tex]a=\dfrac{500\ N}{75\ kg}[/tex]

[tex]a=6.66\ m/s^2[/tex]

So, the acceleration of the object is [tex]6.66\ m/s^2[/tex]. Hence, this is the required solution.

Instantaneous acceleration is defined as rate of change in velocity

it is given by the equation

[tex]a = \frac{dv}{dt}[/tex]

so here it shows that acceleration is always depends on change in velocity with time and now if we required this change in velocity with time for a small instant of time then it will be given by the slope of velocity and time graph.

So here the graph must be like this to find the slope of any graph we always use the concept that for any graph between y and x we use

[tex]slope = \frac{dy}{dx}[/tex]

if we compare it with the formula of acceleration above

then on Y axis we must have to draw the speed and on x axis we must have to draw the time

so correct answer must be

d) Place time on the x-axis and velocity on the y-axis

If a person does aerobic exercise but does not work to build muscle, they may improve cardiovascular fitness and endurance, but may not see significant changes in muscle size or strength.

Doing aerobic exercise without working to build muscle can have several effects. Aerobic exercise primarily targets and improves cardiovascular fitness, which includes strengthening the heart and improving lung capacity. However, without resistance training, muscle mass and strength may not significantly increase. This means that while a person may improve their endurance and cardiovascular health, they may not see significant changes in muscle size or strength.

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Explanation :

Galileo studied Jupiter and its moons. Newton studied the gravitational force that held the planets in orbit.

Galileo constructed a telescope called Galileo's Telescopes. He also supported the Copernican theory.

Newton proposed the Universal law of gravitation. According to him, there exists a force between objects in the universe which is directly proportional to the product of masses and inversely proportional to the square of the distance between them.

i.e.

[tex]F=G\dfrac{m_1m_2}{r^2}[/tex]

So, we can say that the two scientists proposed different theories about the solar system. This shows that they both had different interests.

It sounds like the ball's velocity along the [tex]y[/tex]-axis should be taken to be constant, in which case the ball has velocity vector

[tex]\mathbf v(t)=\left(2.10\,\dfrac{\mathrm m}{\mathrm s^2}\right)t\,\hat{\imath}+\left(1.30\,\dfrac{\mathrm m}{\mathrm s}\right)\,\hat{\jmath}[/tex]

We note that at [tex]t=t_0[/tex], we're told the ball is at the origin, so its position at this point is [tex]\mathbf r(t_0)=\mathbf 0[/tex]. We then integrate the velocity vector to find the position vector:

[tex]\mathbf r(t)=\mathbf r(t_0)+\displaystyle\int_{\tau=t_0}^{\tau=t}\mathbf v(\tau)\,\mathrm d\tau[/tex]

[tex]\mathbf r(t)=\displaystyle\int_{\tau=t_0}^{\tau=t}\left(2.10\,\dfrac{\mathrm m}{\mathrm s^2}\right)\tau\,\hat{\imath}+\left(1.30\,\dfrac{\mathrm m}{\mathrm s}\right)\,\hat{\jmath}\,\mathrm d\tau[/tex]

[tex]\mathbf r(t)=\left(1.05\,\dfrac{\mathrm m}{\mathrm s^2}\right)\tau^2\,\hat{\imath}+\left(1.30\,\dfrac{\mathrm m}{\mathrm s}\right)\tau\,\hat{\jmath}\bigg|_{\tau=t_0}^{\tau=t}[/tex]

[tex]\mathbf r(t)=\left(1.05\,\dfrac{\mathrm m}{\mathrm s^2}\right)(t^2-{t_0}^2)\,\hat{\imath}+\left(1.30\,\dfrac{\mathrm m}{\mathrm s}\right)(t-t_0)\,\hat{\jmath}[/tex]

For the sake of simplicity, I'll assume [tex]t_0=0[/tex], so that

[tex]\mathbf r(t)=\left(1.05\,\dfrac{\mathrm m}{\mathrm s^2}\right)t^2\,\hat{\imath}+\left(1.30\,\dfrac{\mathrm m}{\mathrm s}\right)t\,\hat{\jmath}[/tex]

(a) Then at [tex]t=2.50\,\mathrm s[/tex], the ball's position in the plane is given by the vector

[tex]\mathbf r(2.50\,\mathrm m)=(6.56\,\mathrm m)\,\hat{\imath}+(3.25\,\mathrm m)\,\hat{\jmath}[/tex]

which is to say its position in the plane is at the point (6.56, 3.25).

(b) The ball's displacement is the same as its position, but in vector form (as above).

(c) The ball has velocity

[tex]\mathbf v(2.50\,\mathrm s)=\left(5.25\,\dfrac{\mathrm m}{\mathrm s}\right)\,\hat{\imath}+\left(1.3\,\dfrac{\mathrm m}{\mathrm s}\right)\,\hat{\jmath}[/tex]

That is, the ball has a speed of [tex]\|\mathbf v(2.50\,\mathrm s)\|=5.41\,\dfrac{\mathrm m}{\mathrm s}[/tex] and is traveling in a direction of about [tex]13.9^\circ[/tex] relative to the positive [tex]x[/tex]-axis.

At t=2.5s, the ball's position will be at coordinates (6.5625, 3.25), have a displacement of approximately 7.23 metres, and have a velocity of 5.25 m/s in the x direction and 1.3 m/s in the y direction.

The subject of this question is physics, specifically kinematics, and the topic is motion in two dimensions. We will calculate the x and y coordinates, the displacement, and the velocity for the given conditions. First we will calculate the x-coordinate using the equation of motion x = ut + 0.5at^2, where 'u' is initial velocity, 'a' is acceleration and 't' is time. Here, the initial velocity along x-axis is zero, acceleration is 2.10 m/s^2, and time is 2.5 s. Substituting these values, we get x = 0 + 0.5 * 2.1 * (2.5)^2 = 6.5625 m.

Next, for the y-coordinate, since there is no acceleration along y-axis, its position at any time is given by y = ut, where 'u' is initial velocity along y-axis, and 't' is time. So, y = 1.30 * 2.50 = 3.25 m.

Next, the displacement, which is the shortest distance from the initial to the final position, can be found using the Pythagorean theorem, d = sqrt(x^2 + y^2). Thus, d = sqrt((6.5625)^2 + (3.25)^2) = 7.23 m approximately.

Lastly, the velocity of the ball at any point is given by v = u + at, where 'a' is the acceleration along the x-axis, 't' is time and 'u' is the initial velocity (which is zero in this case along the x-axis). So, v = 0 + 2.1 * 2.5 = 5.25 m/s along the + x-direction. And, the velocity along the y-axis remains constant as 1.30 m/s because there's no acceleration in the y direction.

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Here in order to find out the distance between two planes after 3 hours can be calculated by the concept of relative velocity

[tex]v_{12} = v_1 - v_2[/tex]

here

speed of first plane is 700 mi/h at 31.3 degree

[tex]v_1 = 700 cos31.3\hat i + 700 sin31.3\hat j[/tex]

[tex]v_1 = 598.12\hat i + 363.7\hat j[/tex]

speed of second plane is 570 mi/h at 134 degree

[tex]v_2 = 570 cos134 \hat i + 570 sin134 \hat j[/tex]

[tex]v_2 = -396\hat i + 410\hat j[/tex]

now the relative velocity is given as

[tex]v_{12} = (598.12 + 396)\hat i + (363.7 - 410)\hat j[/tex]

[tex]v_{12} =994.12\hat i -46.3 \hat j[/tex]

now the distance between them is given as

[tex]d = v* t[/tex]

[tex]d = (994.12 \hat i - 46.3 \hat j)* 3[/tex]

[tex]d = 2982.36\hat i - 138.9\hat j [/tex]

so the magnitude of the distance is given as

[tex]d = \sqrt{2982.36^2 + 138.9^2}[/tex]

[tex]d = 2985.6[/tex] miles

so the distance between them is 2985.6 miles

Answer:

Planes are 2985.48 miles far after 3 hours.

Explanation:

 Let right represents positive x- axis and up represent positive y - axis. Horizontal component is i and vertical component is j.

We have velocity of the first airplane is 700 m/h at an angle 31.3° to the horizontal.

So Velocity of first plane = 700 cos 31.3 i +   700 sin 31.3 j

                                          = (598.12 i + 363.66 j) m/h

We also have velocity of the second airplane is 570 m/h at an angle 134° to the horizontal.

      Velocity of second plane = 570 cos 134 i +   570 sin 134 j

                                                 = (-395.96 i + 410.02 j) m/h

Displacement of first plane after 3 hours = Velocity * Time

                                                    = (598.12 i + 363.66 j) *3

                                                     = (1794.36 i + 1090.98 j) mi

Displacement of second plane after 3 hours = (-395.96 i + 410.02 j)*3

                                                      = (-1187.88 i + 1230.06 j) mi

Displacement vector between two planes = (1794.36 i + 1090.98 j) - (-1187.88 i + 1230.06 j)

                                                      = (2982.24 i - 139.08 j) mi

Magnitude of displacement = [tex]\sqrt{2982.24^2+(- 139.08)^2} =2985.48 mi[/tex]

So planes are 2985.48 miles far after 3 hours.

Answer:

The answer is A.

Explanation:

D = m/V  

Volume:  

3.00 x 3.00 x 3.00 = 27 cm³  

Answer A

The volume of the block is (3cm) · (3cm) · (3cm) = 27 cm³ .

That's how much water gets pushed out of the way when the block sinks in water. It makes no difference what the block is made of, or what its mass or density is.  Pick choice-A .

To find the horizontal distance traveled by the ball, we calculate the horizontal component of its initial velocity by multiplying the initial velocity by the cosine of the angle.

To find the horizontal distance traveled by the ball, we need to calculate the horizontal component of its initial velocity. Since the initial velocity is given as 10.0 m/s at an angle of 30.0°, we can use trigonometry to determine the horizontal component.

The horizontal component can be found by multiplying the initial velocity by the cosine of the angle:

Horizontal component = initial velocity * cos(angle)

Plugging in the given values, we get:

Horizontal component = 10.0 m/s * cos(30.0°) = 10.0 m/s * 0.866 = 8.66 m/s

Now, we can calculate the horizontal distance traveled by multiplying the horizontal component of the initial velocity by the time the ball moves through the air:

Horizontal distance = horizontal component * time = 8.66 m/s * 3.2 s = 27.712 m

Therefore, the horizontal distance traveled by the ball is approximately 27.712 meters.

Mass of block = 55kg

Height   = 30m

Block's potential energy at height of 30 m=/

As

Potential energy = mgh

g=9.8m/sec²

So P.E= (55kg)(9.8m/sec²)(30m)

P.E= 16170 kgm²/sec²

P.E= 16170 joules

The potential energy of the 55 kg block that is lifted 30 m can be calculated using the formula: Potential Energy = mass x gravity x height. Plugging in the values, the potential energy of the block is 16,170 Joules.

The potential energy of a block lifted to a certain height can be calculated using the formula:

Potential Energy = mass × gravity × height

Given that the mass of the block is 55 kg, the acceleration due to gravity is 9.8 m/s2, and the height is 30 m, we can plug in these values to calculate the potential energy of the block:

Potential Energy = 55 kg × 9.8 m/s2 × 30 m = 16,170 J

Therefore, the potential energy of the block is 16,170 Joules.

"Vaporize" means "turn into vapor".

A). Condensation . . . No. That's turning from gas into liquid.

B). Evaporation . . . Yes.  That's turning from liquid into gas.

C). Freezing . . . No. That's turning from liquid into solid.

D). Melting . . . No. That's turning from solid into liquid.

They fall slower. Hope this helped :)

What I think happens, is that the object tends to FALL SLOWER.  

(Eg.  A heavy Rock thrown in the water.).

Hope that helps!!!!!                                      : )

Hello!

Answer: Newton's Laws of Motion.

Explanation:

↓↓↓↓↓↓↓↓↓↓↓↓

Isaac Newton he performed many experiments involving light (optics). Then he published works on mathematics, history, calculus, and theology. And he published his most significant book, Philosophiae Naturalis Principia Mathematica, in 1687. Newton's first law of motion states that an object at rest stays at rest, and an object in motion stays in motion, unless acted on by an unbalanced force. This is also known as the law of inertia. Inertia is the natural tendency of objects to resist change in motion. Newton's second law of motion states that the total net force acting an object is equal to mass times acceleration. Newton's third law of motion states that for every action, there is an equal and opposite reaction. It considered action and reaction forces.

Hope this helps!

Thank you for posting your question at here on brainly.

-Charlie

Answer:

Option D

Explanation:

The kinetic energy of a track star is given by the expression [tex]\frac{1}{2} mv^2[/tex], where m is the mass of track star and v is the velocity of track star.

The potential energy is given by the expression mgh , where h is the height of track star and g is acceleration due to gravity value.

By energy conservation theory, energy can neither be created or destroyed.

So a running track stars kinetic energy is converted to potential energy when he jumps.

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

                 [tex]h=\frac{v^2}{g}[/tex]

                        h ∝ [tex]v^2[/tex]

 So height reached increases when velocity of speed star increases.

 So the answer is the kinetic energy before the jump is converted to potential during the jump.

Answer:

d

Explanation:

Answer:

A&B

Explanation:

A ) The climate zone that Jackson lives in is : ( A ) Temperate marine

B )  The ways in which the Earth's tilt will affect Jackson's temperature zone and climate are ; ( B and C )  

Temperate marine climates are climate zones experiencing mild winters and cooler summer unlike other climates, also a temperate marine climate is generally humid because it experiences moderate rainfall for the majority part of the year.Temperate marine climates are experienced in the poleward regions of the Mediterranean climate regions.

The tilting of the Earth allows sun rays to strike the temperature zone during summer directly and at a lower angle during winter.

Hence we can conclude that the  The climate zone that Jackson lives in is :  Temperate marine.

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The total mechanical energy of an object is calculated as the sum of kinetic energy and potential energy of the object".

Mechanical energy is the total of kinetic and potential energy in the physical sciences. According to the concept of mechanical energy conservation, mechanical energy remains constant in an isolated system when only conservative forces are acting on it. Potential energy increases when an item travels in the opposite direction of a conservative net force. Kinetic energy also varies as an object's speed, not velocity, changes. yet, neoconservative forces, such frictional forces, will always be present in actual systems; yet, if these forces are of minimal magnitude, mechanical energy changes little, making the idea of its conservation a reasonable approximation. The kinetic energy is retained in elastic collisions, but some mechanical energy may be released in inelastic collisions.

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The acceleration of the car that when from rest to 30m/s in 1 minute is 0.5 m/s².

The first equation of motion is expressed as:

v = u + at

Given the data in the question:

Elapsed time t = 1 minutes = 1 × 60 = 60 seconds

Initial velocity u = 0

Final velocity = 30 m/s

Acceleration a =?

Plug the given values into the above formula and solve for the acceleration of the car.

v = u + at

30 = 0 + ( a × 60 )

30 = 0 + 60a

30 = 60a

a = 30/60

a = 3/6

a = 0.5 m/s²

Therefore, the acceleration is 0.5 m/s².

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That would be a conduction.

conduction

hope this helped

oohhhhhhh i just figured this out

toxicity- B

heat of combustion- A

flammability- D

compressibility- C

Here are the matched terms with their corresponding definitions:

A) Compressibility: Measure of how much the volume of matter can decrease under pressure.

B) Flammability: How easily a substance can be set on fire.

C) Heat of combustion: Measure of how much heat is given off when a substance is burned.

D) Toxicity: The ability of a substance to damage or harm an organism.

Flammability is a property of a substance that refers to how easily it can catch fire or ignite when exposed to an open flame, heat, or other sources of ignition. It is a measure of the substance's susceptibility to burning. Substances with high flammability are more likely to ignite and sustain combustion, while those with low flammability are less likely to do so.

Flammability is an important characteristic to consider in various contexts, including safety regulations, the handling and storage of chemicals, and the development of fire-resistant materials.

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There are 60 minutes in 1 hour.  If the ship covers 17,460 miles in one hour, then it covers (17,460 / 60) = 291 miles in 1 minute.

Also 4.85 miles in 1 second, and 419,040 miles in 1 day.

If a space shuttle travels at 17460 miles per hour, it is moving at a speed of 291 miles per minute after dividing by 60, the number of minutes in an hour.

If a space shuttle is traveling at 17460 miles per hour, to determine how fast it is moving per minute we can perform a simple conversion. Since there are 60 minutes in an hour, we divide the shuttle's speed by 60.

17460 miles per hour \/ 60 minutes per hour = 291 miles per minute.

So, the space shuttle is moving at a speed of 291 miles per minute.

Answer:

 Terminal velocity of object = 12.58 m/s

Explanation:

 We know that the terminal velocity is attained when drag force and gravitational force are of the same magnitude.

Gravitational force = mg = 80 * 9.8 = 784 N

Drag force = [tex]12.0v+4.00v^2[/tex]

Equating both, we have

    [tex]784=12.0v+4.00v^2\\ \\ v^2+3v-196=0\\ \\ (v-12.58)(v+15.58)=0[/tex]

  So v = 12.58 m/s or v = -15.58 m/s ( not possible)

 So terminal velocity of object = 12.58 m/s    

Final answer:

Density is a physical property of a substance, which can be observed and measured without changing the substance's chemical identity.

Explanation:

Density is a characteristic of a substance that refers to how much mass is contained in a given volume. It is considered a physical property because it can be observed and measured without changing the substance's chemical identity. Density can be particularly helpful in identifying substances and is measured in units such as grams per cubic centimeter (g/cm³) for solids and liquids or grams per liter (g/L) for gases.

Contrasting with physical properties are chemical properties, which describe how a substance can change or react to form new substances. These require a chemical change to be observed, such as rusting iron or burning wood, which both result in new chemical substances being formed.

Therefore, to answer the student's question, density is not a physical change, a chemical change, nor a chemical property; it is a physical property.

The kinetic energy of the object is 53775 Joules.

Given the following data:

To find the kinetic energy of the object:

Kinetic energy is an energy that is possessed by a physical object or body due to its motion.

Mathematically, kinetic energy is calculated by using the formula;

[tex]K.E = \frac{1}{2} MV^2[/tex]

Where:

Substituting the values, we have;

[tex]K.E = \frac{1}{2}[/tex] × [tex]478[/tex] × [tex]15^2[/tex]

[tex]K.E = 239[/tex] × [tex]225[/tex]

Kinetic energy = 53775 Joules

Therefore, the kinetic energy of the object is 53775 Joules.

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The answer would be greater.

As the temperature of a common ordinary piece of wire increases, its resistance increases too.

By calculating the frictional force (0.25 * 50 N = 12.5 N), which is larger than the force of gravity on the book (10 N) we find that the book remains at rest against the wall. Hence, option c is correct.

This problem is about force and friction acting on a static object. To solve it, you first need to get the normal force acting on the book which is equal to the horizontal force pressing it against the wall (50 N). For a book to remain at rest the frictional force should be equal or greater than the weight of the book which is the mass times gravity, that is, 1 kg * 10 m/s^2 = 10 N.

The static frictional force between the book and the wall is calculated by multiplying the coefficient of static friction (0.25) and the normal force (50 N). This gives us a frictional force of 12.5 N which is greater than the weight of the book (10 N). Therefore the book remains at rest and doesn't slide along the wall. The correct statement hence is option c: The book remains at rest and the modulus of the frictional force between the book and the wall is 12.5N.

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