If u have a box with mass of 10kg and u push with a force of 200 N what is the acceleration of the box ?

Answer:

86.7

Explanation:

sana makatulong yung answer ko

Answer:

a) a = 1 [m/s²]

b) a = 0.25 [m/s²]

Explanation:

To solve this problem we must use the following equation of kinematics.

a)

Between 0 and 2 seconds

where:

Vf = final velocity = 2 [m/s]

Vo = initial velocity = 0

a = acceleration [m/s²]

t = time = 2 [s]

Note: the positive sign of acceleration in the previous equation allows us to appreciate that the velocity is increasing

2 = 0 + a*2

a = 2/2

a = 1 [m/s²]

b)

Between 2 and 4 seconds

where:

Vf = final velocity = 2.5 [m/s]

Vo = initial velocity = 2

a = acceleration [m/s²]

t = time = (4 - 2) = 2 [s]

2.5 = 2 + a*2

2.5 - 2 = 2*a

0.5 = 2*a

a = 0.25 [m/s²]

Speed = distance / time

Speed = 120 km / 2 1/2 hours

Speed = 48 km per hour

Answer:

B. Bending her knees will make the force 20 times smaller.

Explanation:

By the Impulse Theorem, we notice that the normal force from the ground to the gymnast counteract the intial linear momentum of the gymnast during a certain time until rest is reached. The impulse (\(Imp\)), measured in newton-second, is function of initial linear momentum, measured in kilogram-meters per second, only and, hence, remains constant. That is:

\(Imp = m\cdot v\) (1)

Where:

\(m\) - Mass of the gymnast, measured in kilograms.

\(v\) - Initial speed of the gymnast, measured in meters per second.

If we know that \(m = 60\,kg\) and \(v = 20\,\frac{m}{s}\), the impulse experimented by the gymnast is:

\(Imp = (60\,kg)\cdot\left(12\,\frac{m}{s} \right)\)

\(Imp = 720\,\frac{kg\cdot m}{s}\)

If the time of collision is increased by a factor of 20 by bending her knees, then normal force from the ground on the gymnast must be decrased by a factor of 20 in order to keep the impulse constant.

Therefore, the right answer is B.

An electric iron is marked 120 volts and 500 Watts. The units consumed by it in using it for 24 hours can be calculated using the formula:Power (in watts) = Voltage (in volts) x Current (in amperes)P = V x I

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Answer:it’s A. right for ape x

Explanation:

Based on data, digital waves are more reliable because they are less likely to change when copied (Option A).

A wave is a periodic distortion capable of traveling through a suitable media (either air or water).

In conclusion, based on data, digital waves are more reliable because they are less likely to change when copied (Option A).

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Answer:

Thermal and kinetic.

Explanation:

Thermal energy is the energy generated by heat. Kinetic energy is the movement of particles in a substance which is responsible for the heat increase.

Answer:Thermal and kinetic.

Explanation:

Answer:

0.028 M.

Explanation:

NOTE: This question is a chemistry question. However, the answer to the question can be obtained as shown below:

We'll begin by calculating the number of mole in 2.52 g of oxalic acid, C₂H₂O₄. This can be obtained as follow:

Mass of C₂H₂O₄ = 2.52 g

Molar mass of C₂H₂O₄ = (2×12) + (2×1) + (4×16)

= 24 + 2 + 64

= 90 g/mol

Mole of C₂H₂O₄ =?

Mole = mass / molar mass

Mole of C₂H₂O₄ = 2.52 / 90

Mole of C₂H₂O₄ = 0.028 mole

Finally, we shall determine the molarity of the solution. This can be obtained as follow:

Mole of C₂H₂O₄ = 0.028 mole

Volume = 1 L

Molarity =?

Molarity = mole / Volume

Molarity = 0.028 / 1

Molarity = 0.028 M

Therefore, the molarity of the solution is 0.028 M.

Question is whether the statement made is true or false.

Answer:

False

Explanation:

The statement is false.

Thus is because even though we are told that the spaceship is running at 1000 miles per hour and an enters an area free of gravitational forces, there is no rule or law that says the engine must run at some maximum level to maintain the velocity.

So, that's why it is false as there is no proof of the statement from every law of physics.

Answer:

Mirage is a phenomenon which can be seen when the surface air gets heated up and it becomes lighter. Lighter air moves up in the atmoshphere.

Explanation:

When the lighter air from cooler areas to warmer areas are refracted and they bent upwards.and it dispers

,

Sound waves are a type of mechanical wave that propagate through a medium, typically air but also other materials such as water or solids.

Frequency: the frequency of a sound wave refers to the number of cycles or vibrations it completes per second and is measured in Hertz (Hz).

Amplitude: the amplitude of a sound wave refers to the maximum displacement or intensity of the wave from its equilibrium position. It represents the loudness or volume of the sound, with larger amplitudes corresponding to louder sounds and smaller amplitudes corresponding to softer sounds.

Wavelength: the wavelength of a sound wave is the distance between two consecutive points in the wave that are in phase, such as from one peak to the next or one trough to the next. It is inversely related to the frequency of the wave.

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Consider that the formula for the capacitance of a square parallel plate capacitor is:

where A=L^2 is the area of each plate, d is the separation between plates and

ε0 is the dielectric permitivity of vacuum ans is equal to 8.82*10^-12 F/m.

If you solve the previous expression for L and replace the given values for d and C, you obtain:

Hence, the proper value of L to construct the required capacitor is approximately 0.95cm

Answer:

4/3 ft/s

Explanation:

(3.01+2.99)/2 = 3.00

(4 ft)/(3.00 s) = 4/3 ft/s

Mark's work decreases when he climbs the same flight of stairs again in the same amount of time without the cello.

The correct answer is option D.

The amount of work Mark does depends on the weight of the cello, as well as the distance he climbs and the time it takes. Work is calculated using the formula :

Work = Force × Distance.
In the given scenario, Mark is carrying a full-sized cello while climbing the stairs. The weight of the cello adds to the force he exerts. So, the total force Mark exerts is the weight of the cello plus his own weight (375 N).

When Mark climbs the stairs with the cello, he is doing work against the force of gravity.

The work done is equal to the force exerted multiplied by the distance climbed (375 N + weight of cello) × 4 m.

Now, if Mark were to climb the same flight of stairs again in the same amount of time (3 seconds), but this time without the cello, the amount of work he does would decrease. This is because without the cello, the force exerted would only be Mark's weight (375 N), which is less than the total force exerted with the cello.

Therefore, mark's work decreases.

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The coefficient of kinetic friction between the box and the floor is 0.87.

The coefficient of kinetic friction between the box and the floor is calculated by applying the formula for net force on the box.

F(net) = ma

where;

at a constant velocity, the acceleration of the box, a = 0

F(net) = 0

The net force is obtained from the applied force and force of friction;

Fcosθ - μmg = 0

where;

μmg  = Fcosθ

μ = Fcosθ / mg

μ = (485 x cos55) / (32.6 x 9.8)

μ = 0.87

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Answer:

Vo (vertical) = Vo sin 30 = 30 m/s / 2 = 15 m/s

Vo (horizontal) = Vo cos 30 = .866 30 m/s = 26 m/s

Answer:

B. energy

Explanation:

A vector has direction.

Energy does not have a direction.

Answer:

Photovoltaic detection is a technique that converts light into electrical energy. It is a process that involves the use of a photovoltaic cell, which is made up of semiconductor materials, to generate an electric current when exposed to light.

The photovoltaic cell absorbs the photons of light, which then knock electrons out of their orbits, creating a flow of electricity. The amount of electricity produced is proportional to the intensity of the light. The photovoltaic cell is commonly used in solar panels to generate electricity from sunlight. The efficiency of the photovoltaic cell is dependent on several factors, including the type of semiconductor material used, the purity of the material, and the thickness of the cell.

The photovoltaic cell has many applications, including in solar power generation, telecommunications, and remote sensing. The technique of photovoltaic detection is an important area of research, as it has the potential to provide a clean and renewable source of energy that can help mitigate climate change.

Learn more about Photovoltaic detection

Answer:

Explanation:

1. Place a cup of hot tea on a flat surface.

2. Place a thermometer in the tea and record the temperature.

3. Place a fan in front of the cup of tea and turn it on.

4. Place the thermometer in the tea again and record the temperature.

5. Compare the two temperatures and observe the difference.

6. The difference in temperature is an indication of the thermal energy that has been dissipated from the cup of hot tea.

Complete question:

A fireman of mass 80 kg slides down a pole. When he reaches the bottom, 4.2 m below his starting point, his speed is 2.2 m/s. By how much has thermal energy increased during his slide?

Answer:

The thermal energy increased by 3,099.2 J

Explanation:

Given;

mass of the fireman, m = 80 kg

initial position of the fireman, hi = 4.2 m

final speed, v = 2.2 m/s

The change in the thermal energy is calculated as;

ΔE +  (K.Ef - K.Ei) + (Uf - Ui) = 0

where;

ΔE is the change in the thermal energy

K.Ef is the final kinetic energy

K.Ei is the initial kinetic energy

Uf is the final potential energy

Ui is the initial potential energy

\(\Delta E_{th} + (\frac{1}{2} mv_f^2 - \frac{1}{2} mv_i^2) + (mgh_f - mgh_i)=0\\\\initial \ velocity, \ v_i = 0\\final \ height , \ h_f = o\\\\\Delta E_{th} + (\frac{1}{2} mv_f^2) + ( - mgh_i)=0\\\\\Delta E_{th} + \frac{1}{2} mv_f^2 - mgh_i = 0\\\\\Delta E_{th} =mgh_i - \frac{1}{2} mv_f^2\\\\\Delta E_{th} = 80 \times 9.8 \times 4.2 \ \ - \ \ \frac{1}{2} \times 80 \times (2.2)^2 \\\\\Delta E_{th} = 3292.8 \ J \ - \ 193.6 \ J\\\\\Delta E_{th} = 3,099.2 \ J\)

We can see here that to briefly describe what is happening for each variable during the identified time periods, you can follow these steps:

A variable is a characteristic, property, or quantity that can vary or change in value. In the context of data analysis, research, or experimentation, variables are used to represent the different factors or elements that are being studied or observed.

Variables can take on different types and play various roles in a study or analysis.

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the answer for the speed of the roller coaster at the top of the loop is v = 14.8 m/s

the minimum speed necessary for the coaster to complete the loop without falling off the track is 11.3 m/s.

(a) To find the speed of the roller coaster at the top of the loop, we can use the equation for centripetal acceleration: a = v^2/r. We know that the radius of curvature is 13.0 m and the downward acceleration of the car is 1.50 g (where g is the acceleration due to gravity, approximately 9.8 m/s^2).

So, we can rearrange the equation to solve for v: v = sqrt(ar)

Plugging in the values, we get: v = sqrt(1.5g * 13m)

v = sqrt(22.5 * 9.8)

v = sqrt(219.5)

v = 14.8 m/s

(b) To find the minimum speed necessary for the coaster to complete the loop without falling off the track, we can use the same equation for centripetal acceleration, but this time we will use the minimum value of a that will keep the car on the track, which is equal to the acceleration due to gravity (g).

So, we can rearrange the equation to solve for v: v = sqrt(ar)

Plugging in the values, we get: v = sqrt(g * 13m)

v = sqrt(9.8 * 13m)

v = sqrt(127.4)

v = 11.3 m/s

So the minimum speed necessary for the coaster to complete the loop without falling off the track is 11.3 m/s.

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Since you aren't painting on top of the pool, you are painting the pool's four sides, its bottom, and its five faces. 104 square meters is the surface area. The total cost of the paint was $624.

A three-dimensional shape's surface area is the sum of all of its faces. Finding the area for every face and adding them together gives us the land area of a shape.

The water-resistant paint required for the pool, which is 8 meters long, 6 meters wide, and 2 meters deep, costs $6 per sq meter.

A) Because you aren't painting on top of the pool, you are painting the pool's four sides, its bottom, and its five faces.

B) The pool requires 104 square meters of paint.

Just use surface area equation assuming the pools is a rectangular prism:

SA = wl + 2(hl) + 2(hw)

Since we're only including pool's bottom, don't add times 2 for wl.

l = 8 m

w = 6 m

h = 2 m

SA = (6)(8) + 2((2)(8)) + 2((2)(6))

SA = 104 sq m

C) The total cost of the paint was $624. $624 is equivalent to $104 × 6 square meters.

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Answer:

 ΔV = -2.1 L

Explanation:

To solve this exercise we can use the ideal gas equation for two points

         PV = nRT

          P₁V₁ = P₂ V₂

where point 1 is on the surface and point 2 is at the desired depth,

          V₂ = \(\frac{P_1}{P_2} \ V_1\)

let's calculate

           V₂ = ( \(\frac{1 atm}{2.5 atm}\) ) 3.5 L

            V₂ = 1.4 L

this is the new volume, the change in volume is

          ΔV = V₂ -V₁

          ΔV = 1.4-3.5

          ΔV = -2.1 L

Wave speed  (v)  will be 160 m/s

Wave speed is the distance the wave travels in a given amount of time, such as the number of meters it travels per second or Wave speed is the distance travelled by a wave per unit time. It is the speed with which a disturbance of the particle like a crest/ trough, compression / rarefaction propagates through a medium. Its SI unit is m/s.

The Wave speed formula which involves wavelength and frequency is given by: v = f λ Where, v is the velocity of the wave and f is the frequency of the wave.

Wave is a disturbance in which there is a transfer of energy from place to place. The particles of the medium vibrate during wave propagation. In the transverse wave, the particles vibrate up and down and are perpendicular to the direction of wave propagation. In a longitudinal wave, the particles vibrate along the direction of wave propagation.

wave speed = frequency * wavelength

                    = 20 * 8 = 160 m/s

wave speed  is 160 m/s

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The resultant force acting on the whale is 18000 the mass of the whale is 4100 kg is 4.39 \(m/s^{2}\)

The resultant force acting on an object is the net force acting on the object, which is the vector sum of all the individual forces acting on the object. In this case, we have a whale with a resultant force of 18000 N acting on it, and a mass of 4100 kg.

The relationship between force, mass, and acceleration is given by Newton's Second Law of Motion, which states that the net force acting on an object is equal to the product of its mass and acceleration:

F_net = m * a

where F_net is the net force, m is the mass of the object, and a is the acceleration of the object.

Rearranging this equation, we can solve for the acceleration of the whale:

a = F_net / m

Substituting the given values, we get:

a = 18000 N / 4100 kg

a ≈ 4.39 \(m/s^{2}\)

This means that the whale is accelerating at a rate of approximately 4.39 \(m/s^{2}\) due to the resultant force acting on it. The direction of this acceleration will depend on the direction of the resultant force.

It is important to note that a force alone does not determine the motion of an object. The motion of an object depends on the net force acting on it and the object's initial velocity. If the whale was already moving before the resultant force was applied, then the motion of the whale would depend on the interaction between the force and the object's initial velocity.

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Answer:

uninstell this apps nobody will give u ans its happening to me alsoi was in exam hall i thought this app will give answer but no

Answer:

Takraw is the Thai word for the hand-woven rattan ball originally used in the game. The concept of Footvolley originates from Thai Takraw pronounced (Tha-Graw)

Answer:

The word Takraw originally orginated from Thailand so it is a thai word. It is from a game that uses hand-woven ratten ball.

Explanation: