10. A student gets ready to go to school one day, and he finds out that hiscar's battery is dead. The headlights will not come on, and the car won'tstart. What transformations usually happen when the battery is activeand the headlights come on?A. chemical → electrical lightB. electrical → kinetic →1 light→C. light electrical chemicalD. thermal electrical → light->

F=ma

Newton's second law states that force is proportional to what is required for an object of constant mass to change its velocity. This is equal to that object's mass multiplied by its acceleration. We use Newtons, kilograms, and meters per second squared as our default units, although any appropriate units for mass (grams, ounces, etc.) or velocity (miles per hour per second, millimeters per second2, etc.) could certainly be used as well - the calculation is the same regardless.

The statements which are correct about calculating LaToya's mechanical advantage are—The input force is 50 N, the output force is 450 N and the mechanical advantage is 10.Therefore, the correct option is A, D and E.

Mechanical advantage is the ratio of output force to input force. In this case, LaToya is using a force of 50 N to pull a cart that weighs 500 N. The output force is the weight of the cart minus the force LaToya exerts on it:

Output force = 500 N- 50 N = 450 N

To see why statement F is incorrect, note that the formula for mechanical advantage is:

Mechanical advantage = output force / input force

Substituting the values we found earlier, we get:

Mechanical advantage = 450 N / 50 N = 9

So the mechanical advantage is actually 9, not 100.

Therefore, the correct option is A, D and E.

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As it is pushed deeper, the buoyant force on the jar will decrease. The correct option is B

The upward force applied to an object that is fully or partially submerged in a fluid is known as the buoyant force. Upthrust is another name for this upward thrust. A body submerged partially or completely in a fluid appears to shed weight, or to be lighter, due to the buoyant force.

The fluid under which an object is submerged exerts pressure, which is what generates the buoyancy force. Because a fluid's pressure rises with depth, the buoyancy force is always upward.

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a) 2.0 represents the initial position of the ball,  -3.6 represents the initial velocity of the ball  and 1.7 represents the acceleration of the ball.

b)The unit of 2.0 is meters, the unit of -3.6 is meters per second, and the unit of 1.7 is meters per second squared.

c) Position of of ball at t=1, 2, 3 are -1.9, 5.4 and 9.1 meters respectively

d) Average velocity is 5.5 meter per second

Part a

In the equation x = 2.0 - 3.6t + 1.7t2, the number 2.0 represents the initial position of the ball (i.e., the position of the ball at t = 0 seconds), -3.6 represents the initial velocity of the ball (i.e., the velocity of the ball at t = 0 seconds), and 1.7 represents the acceleration of the ball.

Part b

The unit of 2.0 is meters, the unit of -3.6 is meters per second, and the unit of 1.7 is meters per second squared.

Part c

To determine the position of the ball at t = 1.0 s, 2.0 s, and 3.0 s, we simply substitute these values into the equation:

When t = 1.0 s: x = 2.0 - 3.6(1.0) + 1.7(1.0)^2 = -1.9 meters

When t = 2.0 s: x = 2.0 - 3.6(2.0) + 1.7(2.0)^2 = 5.4 meters

When t = 3.0 s: x = 2.0 - 3.6(3.0) + 1.7(3.0)^2 = 9.1 meters

Part d

The average velocity over the interval t = 1.0 s to t = 3.0 s can be calculated by taking the displacement of the ball during this time interval and dividing it by the time interval:

Displacement = x(3.0) - x(1.0) = 9.1 - (-1.9) = 11.0 meters

Time interval = 3.0 s - 1.0 s = 2.0 s

Average velocity = Displacement / Time interval = 11.0 meters / 2.0 seconds = 5.5 meters per second.

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Answer:the power source

Explanation:

Answer:

A. The power source

Explanation:

Just took the quiz

Answer:

See the explanation below.

Explanation:

To solve this problem we must apply Newton's second law, which tells us that the sum of forces on a body is equal to the product of mass by acceleration and this force can be calculated by means of the following equation.

F = m*a

where:

F = force [N] (units of Newtons)

m = mass [kg]

a = acceleration [m/s²]

The mass of the tennis ball will always be the same therefore it will never change.

Now clearing a:

\(a=\frac{F}{m}\)

If the mass of the ball remains the same:

\(a = \frac{100}{m} ; a = \frac{200}{m};a =\frac{300}{m}\)

We see that for a force of 300 [N], the acceleration exerted on the ball must be greater. Therefore with the force of 300 [N] the greatest acceleration is achieved.

The maximum transverse acceleration of a point on a wire is closest to is 474100 m/s².

The wave function expression is given as :

y = A cos ( ωt + Ф)

A is the amplitude

ω is the angular frequency

Ф is the phase angle

the seconds derivative of wave function is the transverse acceleration :

a = d²y / dt²

a = - ω² A cos ( ωt + Ф)

the maximum  transverse acceleration is given as :

a_max =  ω² A

            = ( 2πf)² A

            = 4 π² f² A

             =  4 × ( 3.14)² (570 )² × 3.7

             = 474100 m/s²

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A specific number of frames per minute are processed by the projector when a motion picture on film is shown.

Motion is indeed the open borders of a body in relation to time. For instance, the fan, the carpet's dust blowing off of it, the water running from the taps, a ball rolling about, a moving car, etc. Even for the universe is always changing.

Movement, the act of process of changing or shifting locations or positions. ability to move with the force of a physical human. gait is the term for the way a person walks. a gesture; a movement or shift in posture.

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A 200.0 lb pumpkin is dropped from the roof of a 5-story (15 m) building. assuming it starts from rest and ignoring drag forces, with what speed does it impact the ground below is as follow:

The potential energy (P.E.) of an object is the energy it has due to its place, and the higher the object's height, the more potential energy it has. As a result, the pumpkin, with a weight of 200.0 lb, is at a height of

5 x 3.28 = 16.4 meters.

Its gravitational potential energy is equal to the product of the mass of the object, the acceleration due to gravity (9.8 m/s²), and its height above the ground. The gravitational potential energy can be calculated as follows:

Gravitational Potential Energy = mgh

where m is the mass, g is the acceleration due to gravity, and h is the height above the ground.

So, Gravitational Potential Energy

= (200.0 lb) x (1 kg/2.2 lb) x (9.8 m/s²) x (16.4 m)

= 1.867 kJ (rounded to three significant figures)

Now, we know that all of this potential energy will be transformed into kinetic energy (K.E.) when the pumpkin is released and starts falling. The kinetic energy formula is:

K.E. = ½mv²

where m is the mass of the object, and v is the velocity (speed) of the object.

Using the above formula, we can calculate the velocity (speed) of the pumpkin when it reaches the ground below.

K.E. = P.E. (since potential energy equals kinetic energy)

½mv² = mgh

We'll substitute in the numbers we've computed so far and solve for v.

v = √(2gh)

Where v is the speed, g is the acceleration due to gravity, and h is the height above the ground.

So, v = √(2gh) = √(2 x 9.8 m/s² x 16.4 m) = 18.2 m/s (rounded to two significant figures)

Therefore, the speed with which the pumpkin strikes the ground is 18.2 m/s.

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When a lens is focussed at infinity, its focal length is calculated. The focal length of a lens indicates the angle of view (how much of the scene will be caught) and magnification.

(a) Using the mirror equation:

1/f = 1/do + 1/di

where f is the focal length, do is the object distance, and di is the image distance. Plugging in the given values:

1/-5.5 = 1/6 + 1/di

Solving for di:

di = -3.3 m

The image distance of the truck is -3.3 m, which means it is behind the mirror and virtual.

(b) Using the magnification equation:

m = -di/do

Plugging in the values:

m = -(-3.3)/6

m = 0.55

The magnification of the mirror is 0.55, which means the image of the truck is smaller than the actual truck.

So, the image distance of the truck is -3.3 m, and the magnification of the mirror is 0.55.

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Two instruments based on Archimedes' principle

Explanation:

Archimedes' principle states -

OR

Applicatios : Lactometer , hydrometer.

Answer:

50m/s.

Explanation:

Answer:

\(V_f=50m/s\)

Explanation:

Use the the formula for final velocity (kinematic equation):

\(V_f=V_i+at\)

Final velocity = Initial velocity + acceleration times time

Given values:

Rest - indicates 0 initial velocity

Acceleration - 10 m/s^2

Time - 5 seconds

Insert the given values:

\(V_f=0+5\times10\)

\(V_f=50m/s\)

Since acceleration is uniform, if the velocity at point B is v, then

\(v^2 - \left(20\dfrac{\rm m}{\rm s}\right)^2 = 2\left(3\dfrac{\rm m}{\mathrm s^2}\right)(120\,\mathrm m)\)

Solve for v :

\(v^2 = \left(20\dfrac{\rm m}{\rm s}\right)^2 + 2\left(3\dfrac{\rm m}{\mathrm s^2}\right)(120\,\mathrm m) \\\\ v = \sqrt{\left(20\dfrac{\rm m}{\rm s}\right)^2 + 2\left(3\dfrac{\rm m}{\mathrm s^2}\right)(120\,\mathrm m)} \\\\ \boxed{v \approx 34 \dfrac{\rm m}{\rm s}}\)

Answer:

Current equals Power divided by Voltage (I=P/V), Power equals Current times Voltage (P=VxI), and Voltage equals Power divided by Current (V=P/I).

P = V I

2.2*10³ = 220 * I

I = 10 amps

Answer:

R = 240 Ω

Explanation:

The resistance created by the light bulb can be calculated by using Ohm's Law:

\(V = IR\\\\R =\frac{V}{I}\)

where,

R = Resistance created by the light bulb = ?

V = Voltage across the bulb = 120 volts

I = current passing through the light bulb = 0.5 A

Therefore,

\(R = \frac{120\ volts}{0.5\ A}\)

R = 240 Ω

Work by gravity plus work by water equals 0 or 2692 = F *1.10 or F = 2447 Newtons

As work-energy, you could:

Since she began and concluded at rest, her initial and final K are both zero. Total work = ΔK.

Gravity: force * distance

mgΔh = 67 * 9.8 * 4.10 = 2692 Joules.

Force * Dist =- F *1.10

Work by gravity + work by water  =  0

2692 - F *1.10   = 0  

2692  =  F *1.10    

F = 2447 Newtons!

Because gravity continues to affect her even when she is submerged, take note of the total distance she travels: 3.00 + 1.10!

Work now being done by the water: Because of the force pushing up on her as she descends, the equation  is negative. Work is negative when the directions of force and distance are in opposition.

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When a runner completes one lap around a 400m track and finishes exactly where she started, her linear distance with respect to the starting position is zero.

This is because the linear distance is the shortest distance between two points, and in this case, the runner started and ended at the same point.

However, it is important to note that the distance covered by the runner is not zero - she has covered a distance of 400 meters by completing one lap around the track.

It is common for people to confuse linear distance with total distance covered, but they are not the same thing. Linear distance refers to the shortest distance between two points,

while total distance covered refers to the overall distance traveled by an object, regardless of the path taken. In this case, the runner covered a total distance of 400 meters by running one lap around the track,

but her linear distance with respect to the starting position is zero because she ended up at the same point where she started.

In conclusion, the runner's linear distance with respect to the starting position is zero, even though she covered a total distance of 400 meters by completing one lap around the 400m track.

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Answer:

135

Explanation:

Answer for the first one is 2. The answer for the 3rd one is 8

Answer:

The velocity of the cricket ball is 17.32 m/s

Time is taken by the ball to reach the highest point = 0.8660 seconds

Explanation:

The cricket ball can be seen and treated as a projectile in this case

The maximum height attained by a projectile in motion can be calculated using the formula:

\(h = \frac{v^2 sin^2 \theta }{2g}\)

In any projectile problem, once we know see that the object was released vertically upwards, we need to know that this means that the angle of projection is 90 degrees, and sin 90 is = 1

hence, h will be modified to become

\(h = \frac{v^2 }{2g}\)

\(v = \sqrt{2gh}\)

We are given that h = 15m and g = 10m/s2

\(v = \sqrt{2 \times 10 \times 15} = 17.32m/s\)

The velocity of the cricket ball is 17.32 m/s

B. We can get the time it took to reach the highest point by dividing

time = distance/speed

Time = 15/17.32 = 0.8660 seconds

Answer:

a true

Explanation:

Water has the high specific heat capacity.

That means it resists to change its temperature when a considerable amount of heat lost or gained

4200J is needed to raise the temperature of 1kg substance by 1 degree Celsius

The weight of the astronaut standing on the moon, denoted as wX, can be expressed as wX = 1/20 * wE. The weight of an object is given by the product of its mass and the acceleration due to gravity.

The weight of an object is given by the product of its mass and the acceleration due to gravity. Since the astronaut's mass remains the same on both Earth and the moon, we can compare the gravitational forces acting on them.

The gravitational force is inversely proportional to the square of the distance between the two objects. Since the radius of the moon is one-fourth that of Earth, the distance between the astronaut and the center of the moon is also one-fourth. Consequently, the gravitational force experienced by the astronaut on the moon is one-twentieth of that experienced on Earth.

Therefore, the weight of the astronaut on the moon, wX, is one-twentieth (1/20) of their Earth weight, wE.

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Answer:

See below ~

Explanation:

Part (a) :

We can say a body is in uniform acceleration if the acceleration of the object remains constant with respect to time throughout its motion.

Part (b) :

We can say a body is non-uniform acceleration if the acceleration of the body varies with respect to time throughout its motion.

Answer:

\(\boxed{m = 162.16 kg}\)

Explanation:

Given:

Weight = W = 600 N

Acceleration due to gravity = g = 3.7 m/s²

Required:

Mass = m = ?

Formula:

W = mg

Solution:

For m, it'll be

=> m = W/g

=> m = 600/3.7

=> m = 162.16 kg

Answer:

Explanation:

Weight (w) = Mass (m) x Acceleration due to gravity (g)

weight = 600 N

g = 3.72076 ms^-2

m = w / g

m = 600 / 3.72076

m = 161.25737752502176974596587793892 kg

m ≈ 161.3 kg

Answer:

Option (3)

Explanation:

From the graph attached,

Zeros of the function are, x = -3,

Graph of the polynomial touches x axis at x = -3, 1 and 3

Therefore, equation of the given function will be in the form of,

P(x) = \(k(x+3)^a(x-1)^b(x-3)^c\)

Since, graph of the function just touches the x-axis, multiplicity of zero at x = -3 will be even and crosses x-axis so the multiplicity at x = 1 and 3 will be odd.

Therefore, possible function will be,

P(x) = \(k(x+3)^2(x-1)(x-3)\)

Since, y-intercept of the function is at (0, -3),

P(0) = k(0 + 3)²(0 - 1)(0 - 3)

-3 = 27k

k = \(-\frac{3}{27}=-\frac{1}{9}\)

Therefore, given polynomial function is,

P(x) = \(-\frac{1}{9}(x+3)^{2}(x-1)(x-3)\)

Option (3) will be the correct option.

Answer:

Neither of the two options.

Explanation:

Before a bullet is fired, the momentum of the bullet-gun system is zero because of lack of velocity. After the gun is fired, both gun and bullet acquire velocity making them nonzero. Thus, it is impossible for the kinetic energy to be zero because both the bullet and the gun are in motion. Also, the momentum is nonzero momentum is the product of the mass of an object and its corresponding velocity. Once the bullet is fired, both the bullet and the gun gains momentum thus making it nonzero.

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ANSWER

EXPLANATION

We want to find the magnitude of the electric field.

To do this, we have to apply the formula for electric field:

where F = force exerted on the charged particle

q = electric charge on the particle

Hence, the magnitude of the electric field is:

The correct answer is the first option.

There are two systems that contain only the fundamental frequency and they are the systems C and D.

The term fundamental frequency refers to the lowest frequency of a vibrating body. It does not include the overtones or the harmonics.

From the image shown in the question, there are two systems that contain only the fundamental frequency and they are the systems C and D.

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If a star is moved twice as far away, it would appear one-fourth as bright.

The apparent brightness of a star depends on its distance and the inverse square law. According to the inverse square law, the brightness of an object decreases as the square of its distance increases. If a star is moved twice as far away, its distance from the observer would be doubled.

Applying the inverse square law, the brightness would decrease by a factor of four (2^2). This means the star would appear one-fourth as bright as before. The amount of light reaching the observer decreases as the distance increases, leading to a decrease in apparent brightness. Therefore, moving a star twice as far away reduces its apparent brightness to one-fourth of its original value.

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Overlooking a lake is a sailboat. The weight of the boat, the buoyant force (the force created when the boat makes contact with the water and is propelled upward), the wind's forward force, and the water's backward drag are the four forces at work.

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Answer:

see below

Explanation:

b ) the vibrations of the air particles are parallel to the direction of energy transfer.

c) use formula

speed = wavelength x frequency

speed = 0.85 x 400

speed = 340 m/s

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