Can someone plz help me

Answer:

See below

Explanation:

Since it is non-uniform acceleration ( it varies with time as given)

The integral of acceleration is velocity

so integrate between 0 and three   15 m/s^2 t

    =   1/2  ( 15 t^2 )   + k      between 0 and 3    ( k is a constant we will ignore)

            = 67.5   - 0     =   67.5 m/s   velocity

the integral of velocity is displacement

 1/2 (15t^2 )   integrated becomes     1/6 15 t^3    from 0 to 3  ( ignoring a constant again)

                                      1/6 * 15 * (3^3 ) = 67.5 meters displacement

THANX for those who noted my errors in my first posted response !!

Answer: D

8.403 m/s

Explanation:

Given that the women's world record for the 400-meter run around an oval track is held by Marita Koch, with a time of 47.60

seconds.

Her average velocity during this race will be

Velocity = distance/ time

Velocity = 400 / 47.6

Velocity = 8.403 m/s

Therefore, her average velocity during this race will be 8.403 m/s

D is therefore the correct answer.

Answer:

a 15.6voltz

i Hope this helps

A. The amount of work done by Georgie is 2304 J

B. The time taken for the 60 W light-bulb to glow is 38.4 s

The amount of work done by Georgie can be obtained as follow:

Work done (Wd) = force (F) × distance (d)

= 24 × 96

= 2304 J

Thus, the amount of work done by Georgie is 2304 J

The time required for the light bulb to glow can be obtain as follow:

Time = Work done / power

= 2304 / 60

= 38.4 s

Thus. the time required is 38.4 s

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Complete question:

Georgie was pulling her brother (of mass 26 kg) in a 9.4 kg sled with a constant force of 24 N for one block (96 m).

(A) How much work did Georgie do? Answer in units of J.

(B) How long would a 60 W lightbulb have to glow to produce the same amount of energy expended by Georgie? Answer in units of s.

The capacitance characteristics allow to find that the response to increase the separation of the plates are:

A capacitor is a system formed by two parallel plates charged with opposite charge that stores energy, the capacitance is

            C =     \(\frac{Q}{\Delta V} = \epsilon_o \frac{A}{d}\)  

Where C is the capacitance, Q the stored charge, ΔV the voltage difference, A the area of ​​the plates, d the separation between them and ε₀ the dielectric permittivity (ε₀ = 8.85 10⁻¹² \(\frac{C^2}{N \ m^2 }\))

In this case the capacitor is charged and then the separation of the plates increases, the different amounts are affected:

In conclusion of the characteristics of capacitance, let us find that the response for increased separation of the plates are:

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The force that affects James when he uses the seesaw is force of  gravity. Option C.

Gravity may be a constrain that exists between any two objects within the universe that have mass. It is an appealing constrain, meaning it pulls objects towards each other. The size of the gravitational constrain depends on the mass of the objects and the separate between them. The bigger the masses of the objects and the closer they are to each other, the more grounded the gravitational drive between them.

Hence, gravity is the force that pulls James down towards the center of the Soil. This drive is dependable for keeping James situated on the teeter-totter and making him move up and down as he plays. The other alternatives, power, contact, and attractive drive, are not pertinent in this situation and don't play a part within the functioning of the teeter-totter.

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Answer:

Given

mass (m) =45kg

velocity (v) =15m/s

momentum (p) =?

Form

p=mv

=45x 15

p=675kg.m/s

the momentum =675kg.m/s

Answer:

Option (b) he is moving with a constant speed (on average)

Explanation:

To know which option is correct, let us calculate the speed at each time.

Case 1:

Distance = 10 yard

Time = 1 s

Speed =?

Speed = distance / time

Speed = 10 / 1

Speed = 10 yard/s

Case 2:

Distance = 20 yard

Time = 2 s

Speed =?

Speed = distance / time

Speed = 20 / 2

Speed = 10 yard/s

Case 3:

Distance = 30 yard

Time = 3 s

Speed =?

Speed = distance / time

Speed = 30 / 3

Speed = 10 yard/s

Case 4:

Distance = 40 yard

Time = 4 s

Speed =?

Speed = distance / time

Speed = 40 / 4

Speed = 10 yard/s

From the calculations made above, we can see clearly that the speed at each case is the same i.e constant. This is true because he is covering the same distance with respect to time.

This also means that the footballer is not accelerating as his speed remains the same i.e constant.

Thus, option B gives the correct answer to the question.

The length of a channel is indicated by its span, which is a measure of distance, typically in meters or feet.

The length of a channel is indicated by its span. A span refers to the length of a bridge or the distance between two supports of a construction. It is the distance between two supports in a bridge, or it may refer to the entire length of a channel.

Here is the explanation: Span refers to the distance between two supports in a bridge or the entire length of a channel. The span of a bridge is the length of a particular bridge. The span of a channel refers to the length of a water channel.

The span of the bridge or channel can be measured in meters, feet, kilometers, miles or any other units of length. Sometimes, span can also refer to the distance between two objects in general.

Conclusion: The length of a channel is indicated by its span, which is a measure of distance, typically in meters or feet.

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The water pressure at the depth where the Titanic lies is approximately 37,458,000 Pa.

The water pressure at a certain depth in a fluid, such as water, can be calculated using the concept of hydrostatic pressure. The hydrostatic pressure increases with depth due to the weight of the fluid above.

To calculate the water pressure at the depth where the Titanic lies, we can use the following formula:

P = ρ * g * h

Where:

P is the pressure

ρ (rho) is the density of the fluid (in this case, water)

g is the acceleration due to gravity

h is the depth

Density of water (ρ): Approximately 1000 kg/m³

Acceleration due to gravity (g): Approximately 9.8 m/s²

First, let's convert the depth of 12,500 feet to meters:

12,500 feet = 12,500 * 0.3048 meters ≈ 3,810 meters

Now we can calculate the water pressure:

P = 1000 kg/m³ * 9.8 m/s² * 3,810 meters

P ≈ 37,458,000 Pascal (Pa)

Therefore, the water pressure at the depth where the Titanic lies is approximately 37,458,000 Pa.

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Answer:

4. INTERNATIONAL ASTRONOMICAL UNION

Answer:

6. force is the pull or push which changes or tends to change the (either rest or motion) of a body.

The electric field inside the dome of a highly-charged van de graaff generator is ZERO.

Van de Graaff generators are electrostatic generators and partial accelerators that store direct current on a hollow sphere by creating a strong electric field. With a potential difference of up to 5 megavolts, it is a partial accelerator.

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Answer:

imma try nd help cuz i havent seen anybody answer so

1.sara

2.same for both

3.tom

Explanation:

Answer:

True.

Explanation:

Energy can be defined as the ability (capacity) to do work. The two (2) main types of energy are;

a. Gravitational potential energy (GPE): it is an energy possessed by an object or body due to its position above the earth.

b. Kinetic energy (KE): it is an energy possessed by an object or body due to its motion.

Furthermore, the mechanical energy of a physical object or body is the sum of the potential energy and kinetic energy possessed by the object or body.

Mathematically, it is given by the formula;

Mechanical energy = G.P.E + K.E

Mechanical energy that has been ‘lost' to friction isn't really lost. It just is no longer in its mechanical form. This is ultimately in accordance with the law of conservation of energy, which states that energy cannot be destroyed but can only be converted or transformed from one form to another.

Hence, Mechanical energy that has been ‘lost' to friction isn't really lost but converted into heat energy.

Based on the provided initial velocity; The cliff was approximately 143.1 meters tall., The box fell approximately 54 meters away from the base of the cliff.

To find the height of the cliff, we can use the following kinematic equation for vertical motion:

y = y0 + v0_yt + 0.5a_y*t⁻².

where:

y = final vertical position

y0 = initial vertical position (0, since we start from the top of the cliff)

v0_y = initial vertical velocity (0, since the box is shoved horizontally)

a_y = vertical acceleration (9.81 m/s², due to gravity)

t = time (5.4 seconds)

Plugging in the values, we get:

y = 0 + 05.4 + 0.59.815.4²

y = 0.59.8129.16

y = 4.90529.16

y = 143.1 m

To find how far away the box fell from the base of the cliff, we can use the following equation for horizontal motion:

x = x0 + v0_x*t

where:

x = final horizontal position

x0 = initial horizontal position (0, since we start from the edge of the cliff)

v0_x = initial horizontal velocity (10 m/s)

t = time (5.4 seconds)

Plugging in the values, we get:

x = 0 + 10*5.4

x = 54 m

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The average potential difference across the coil is: 9 × 10⁻³ volts or 9 millivolts when the magnetic field strength changes as described.

To find the average potential difference, we can use Faraday's law of electromagnetic induction, which states that the induced electromotive force (EMF) in a coil is equal to the rate of change of magnetic flux through the coil. The formula for Faraday's law is:

EMF = -N × (ΔΦ/Δt)

where EMF is the induced electromotive force, N is the number of turns in the coil, ΔΦ is the change in magnetic flux, and Δt is the time interval.

First, we need to convert the cross-sectional area from cm² to m²:

1000 cm² × (1 m / 100 cm)² = 0.1 m²

Next, we calculate the change in magnetic flux:

ΔΦ = (10^-4 Wb/m³ - 10^-3 Wb/m²) × 0.1 m² = -9 × 10⁻⁵ Wb

Now, we can plug the values into Faraday's law formula:

EMF = -100 × (-9 × 10⁻³ Wb / 0.1 s) = 9 × 10⁻³ V

Therefore, the average potential difference across the coil is 9 × 10⁻³volts or 9 millivolts when the magnetic field strength changes as described.

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employing radiation You need some sort of authorization before you can operate with energy that is being sent through space as waves or particles.

The emission or transmission of energy as waves or particles across a material medium or across space is referred to as radiation. This includes electromagnetic radiation from sources like radio waves, microwaves, infrared, visible light, ultraviolet, x-rays, and gamma radiation (particle radiation). In physics and allied fields, a wave is a dynamic disturbance that propagates and causes one or more quantities to depart from equilibrium. When a wave is periodic, its component portions oscillate at a specific frequency frequently in the vicinity of an equilibrium (resting) value.

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The wavelength of an ultrasonic wave with a frequency of 1.0×10^5 Hz, given the speed of sound in air as 340 m/s, is approximately 3.4 mm.

The wavelength of a wave can be calculated using the formula λ = v/f, where λ represents the wavelength, v is the velocity or speed of the wave, and f is the frequency of the wave.

In this case, the frequency is given as 1.0×10^5 Hz, and the speed of sound in air is 340 m/s. By substituting these values into the formula, we can determine the wavelength.

λ = 340 m/s / (1.0×10^5 Hz) = 3.4×10^-3 m = 3.4 mm

Therefore, the wavelength of the ultrasonic wave emitted by bats, with a frequency of 1.0×10^5 Hz, is approximately 3.4 mm.

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Answer:

B. 17.15 watts

Explanation:

Given that

Time = 10 seconds

height = distance = 0.7 meters

weight of sack = mg = F = 245 newtons

Power = work done/ time taken

Where work done = force × distance

Substituting the given parameters into the formula

Work done = 245 newton × 0.7 meters

Work done = 171.5 J

Recall,

Power = work done/time

Power = 171.5 J ÷ 10

Power = 17.15 watts

Hence the power expended is B. 17.15 watts

Answer:

B 17.15 watts

Explanation:

You are using 5 different temperature for one bacterium in the temperature effect exercise in an order to determine the Answer is thermal death point

Thermal death point (TDP) of bacteria is basically the study of effect of heat on the growth of bacteria. In simple terms it is the time needed to kill bacteria in a medium of liquid culture at a particular teperature.

So, the basic procedure is Requirements

Sample: Bacterial sample

Others: Nutrient agar plates, Inoculating loops, Incubator

Procedure

Take two nutrient agar plate and divide it into five quadrants. On each quadrant assign time like 0.15sec, 2min, 5min, 15min. This time will depict at particular temperature for how much time the organism was heated. Now take your sample culture that were heated in different temperatures. Under proper aspetic conditions, with the help of an inoculating loop streak the culture on each part of the quadrant. Incubate the plates at 37 degrees centigrade.

Based on the growth of the bacteria the thermal death point can be estimated. The quadrant in which there is no growth is the temperature and the time required to destroy the bacteria.

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Complete Question

You are using 5 different temperatures for one bacterium in the temperature effects exercise in order to determine the 2.

Multiple Choice

a- thermal death point

b- Benaturation time

c-  decimal education value

d-othermal death time

The kinetic energy of the electron accelerated by a 30 kV source is approximately 4.8 x 10^(-14) Joules.

Voltage (V) = 30 kV = 30,000 volts

Charge of an electron (e) = \(1.6 x 10^(-19) C\)

Calculating the potential energy -

P = e x  V

An object's motion gives it kinetic energy, which is a type of energy. It is described as the amount of effort required to accelerate a body of a specific mass from rest to its specified velocity. As Potential energy is equal to kinetic energy, therefore calculating the kinetic energy:

Potential Energy = Kinetic Energy = e x V

Substituting the value -

\(= (1.6 x 10^(-19) C) x (30,000 V)\)

\(= 4.8 x 10^(-14) J\)

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Answer: cause yes they can

Explanation:

How does u know

Answer:

235.6m/s

Explanation:

you have to use one of the kinematic formulas the best that suits the question given in this case you can use v=u+at.since the time, acceleration and initial velocity have been given in the question

v=116+(9.2)13^2

v=116+119.6

=235.6m/s

I hope this helps

When separated by 4 meters, the 20,000-kilogram truck and the 3,200-kg automobile are attracted to one other with a force of attraction of roughly 0.0000016748 N. The right response in this case is option A.

Newton's rule of universal gravitation, which says that the force between two things is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers, may be used to compute the force of attraction between two objects. The equation can be written mathematically as:

F = G * (m1 * m2) / r^2

Where:

F is the gravitational constant, while G is the force of attraction.

The two objects' masses are m1 and m2, and their separation from one another's centers is r.

In this instance, the truck weighs 20,000 kg, whereas the automobile weighs 3,200 kg. They are 4 meters apart from one another.

With these values entered into the formula, we obtain:

F = (6.674 × 10^-11 N(m/kg)^2) * (20,000 kg * 3,200 kg) / (4 m)^2

F = 1.6748 × 10^-6 N

Therefore, at a distance of 4 meters, the force of attraction between the 3,200-kilogram automobile and the 20,000-kg truck is roughly 0.0000016748 N.

Option A is therefore the one that comes the closest to this value, at 0.0003 N.

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Answer: the organ in the lower body of a woman or female mammal where offspring are conceived and in which they gestate before birth; the womb.

can't tell if you joking or not but thank you for the points

To capture a crisp photograph of a running dog on a bright day, the camera should use a fast shutter speed to freeze the motion of the subject.

The exact shutter speed needed will depend on the speed of the dog and the distance from the camera, but as a general guideline, a shutter speed of at least 1/500th of a second or faster should be used. In bright sunlight, it is common to use a low ISO setting and a narrow aperture (high f-stop number) to further increase the shutter speed. This will allow the camera to capture the image without overexposing the image

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The angles of the first two maxima are approximately 0.0621 radians and  we can adjust the order of the maximum (m) while keeping the other parameters constant.

To determine the angles of the first two maxima of the interference pattern, we can use the formula for the position of the maxima in a double-slit interference pattern:

sin(θ) = mλ / d

where:

θ is the angle of the maxima

m is the order of the maxima (m = 0 for the central band, m = ±1 for the first-order maxima, etc.)

λ is the wavelength of the light

d is the separation between the slits

1) First, let's calculate the angles of the first two maxima (m = ±1) using the given values:

λ = 540 nm = 540 × 10^(-9) m

d = 0.50 mm = 0.50 × 10^(-3) m

For the first-order maximum (m = 1):

sin(θ₁) = (1 × 540 × 10^(-9)) / (0.50 × 10^(-3))

θ₁ = sin^(-1)(1.08 × 10^(-3))

θ₁ ≈ 0.0621 radians

For the first-order maximum (m = -1):

sin(θ₂) = (-1 × 540 × 10^(-9)) / (0.50 × 10^(-3))

θ₂ = sin^(-1)(-1.08 × 10^(-3))

θ₂ ≈ -0.0621 radians (Note: negative angle means opposite side)

Therefore, the angles of the first two maxima are approximately 0.0621 radians and -0.0621 radians.

2) To double the distance between the 0th order and the first-order maximum, we can adjust the order of the maximum (m) while keeping the other parameters constant.

In the given formula, we have sin(θ) = mλ / d. To double the distance between the 0th order and the first-order maximum, we need to increase the value of m by a factor of 2.

Therefore, to achieve this, we can choose the following options:

- Increase the order of the first-order maximum from m = 1 to m = 2.

- Decrease the order of the first-order maximum from m = -1 to m = -2.

By increasing or decreasing the order of the maximum, we effectively increase the angle (θ) between the central band and the first-order maximum, thus doubling the distance between them on the screen.

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a) The correct average velocity of the man is approximately 0.026928 km/h.

b) The correct average speed of the man is approximately 0.03726 km/h.

a) Average Velocity:

To calculate the average velocity, we need to determine the total displacement and divide it by the total time taken.

The north displacement is 28.125 m and the east displacement is 18.45 m. Since we are given that each block represents 1 km, we need to convert these distances to kilometers.

North displacement: 28.125 m ÷ 1000 = 0.028125 km

East displacement: 18.45 m ÷ 1000 = 0.01845 km

The total displacement can be calculated using the Pythagorean theorem:

Total displacement = √((0.028125 km)² + (0.01845 km)²) = √(0.000790039 km² + 0.0003409025 km²) ≈ √0.001130941 km² ≈ 0.03366 km

Since the total time taken is given as 1.25 hours, the average velocity is calculated by dividing the total displacement by the total time:

Average velocity = Total displacement ÷ Total time = 0.03366 km ÷ 1.25 hours ≈ 0.026928 km/h

Therefore, the correct average velocity of the man is approximately 0.026928 km/h.

b) Average Speed:

To calculate the average speed, we need to determine the total distance traveled and divide it by the total time taken.

The total distance traveled is obtained by summing up the north and east distances:

Total distance = 0.028125 km + 0.01845 km = 0.046575 km

Average speed = Total distance ÷ Total time = 0.046575 km ÷ 1.25 hours ≈ 0.03726 km/h

Therefore, the correct average speed of the man is approximately 0.03726 km/h.

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