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(a) The average acceleration of this snowboarder is 0.62 m/s².

(b) The distance travelled by the snowboarder is 12.27.

The average acceleration of this snowboarder is calculated as follows;

v = u + at

where;

v = 0 + at

a = v / t

t = ( 3.9 ) / ( 6.3 )

t = 0.62 m/s²

The distance travelled by the snowboarder is calculated as follows

v² = u² + 2as

where;

v² = 0 + 2as

s = v² / 2a

s = ( 3.9² ) / ( 2 x 0.62)

s = 12.27 m

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Answer:

5

Explanation:

Answer:

calcium chloride

Explanation:

an inorganic compound,a salt with the chemical formula CaCl2

Varible combination that would produce the biggest force of impact on the egg (E). Small time of impact and large speed at impact.

Hi ! This problem is the application of the impulse to the change in momentum. Impulse is the total force applied in a certain time interval. Impulses can cause a change of momentum, because momentum itself is a mass that is affected by the velocity of an object. We know that velocity is a vector quantity easy to change its direction. The relationship between impulse and change in momentum is formulated by :

\( \sf{I = \Delta p} \)

\( \sf{F \cdot \Delta t = (m \cdot v') - (m \cdot v)} \)

\( \boxed{\sf{\bold{F \cdot \Delta t = m (v' -v)}}} \)

With the following condition :

In this case, to produce a great force, then here, we refine the formula again to:

\( \sf{F \cdot \Delta t = m (v' -v)} \)

\( \boxed{\sf{F = \frac{m (v' -v)}{\Delta t}}} \)

Remember, when the result is a comparison, then the numerator part will be proportional to the force. The number that is the denominator will have an inversely proportional value. For this reason, if you want a great force, then:

Varible combination that would produce the biggest force of impact on the egg (E). Small time of impact and large speed at impact.

Given,

Mass of the cars, m₁=m₂=3000 kg

The distance between the cars, r=2m

From the universal law of gravitation,

Where G is the gravitational constant. The value of G is 6.67×10⁻¹¹ N·m²/kg²

On substituting the known values in the above equation,

Therefore the force between the cars is 1.05×10⁻⁴ N

Answer:

C

Explanation:

Answer:

c

Explanation:

In contrast to data in a database, data in a data warehouse is described as subject-oriented, which means that it focuses on a specific area.

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Answer:

B) 1500m/s

Explanation:

Ans is 1500m/s

Answer:

18.36 m/s

Explanation:

We can solve this using conservation of energy. The energy in the system will be conserved since there are no outside forces acting upon it so the potential energy and kinetic energy will be equal. Giving us this formula to start:

1/2mv^2=mgh

m=mass

g=gravity

h=height

v=velocity

We can start by figuring out the total height the rock travels which we can do by subtracting the height of the frisbee by the height the rock started at.

19m-1.8m=17.2m

Now we can plug in our variables to solve for velocity.

First we negate mass since its on both sides and cancels out leaving us with.

1/2v^2=gh

Plug in.

1/2v^2=(9.8)(17.2)

1/2v^2=168.56

v^2=337.12

v=18.36m/s

Answer:

In a material, the magnetic behavior depends on the alignment of magnetic moments of the atoms. Magnetic moments are generated by the motion of the electrons in the atoms. When the magnetic moments of atoms in a material are aligned in a specific pattern, it creates a magnetic field which results in the material being magnetic.

In many materials, the magnetic behavior arises due to the alignment of magnetic domains, which are regions of atoms with magnetic moments aligned in the same direction. When many domains with aligned magnetic moments are present in a material, the material becomes magnetic.

The magnetic behavior of a material depends on the number of electrons and the arrangement of those electrons in the atoms. In particular, for an atom to have a magnetic moment, it must have unpaired electrons, meaning electrons that are not paired with another electron with the opposite spin. When these unpaired electrons in the atoms are aligned, they generate a magnetic moment. If all electrons are paired, there will not be a net magnetic moment, so the material will not be magnetic.

So, in summary, the magnetic behavior of a material is determined by the alignment of magnetic moments of atoms. When the magnetic moments of many atoms in a material align in the same direction, it creates a magnetic field, leading to a material being magnetic. This alignment is usually present in magnetic domains consisting of atoms with unpaired electrons.

Answer:

the answer is true.......

Answer:

a = 7.6\ mph/s

Explanation:

Motion With Constant Acceleration

It's a type of motion in which the velocity of an object changes uniformly in time.

The equation that describes the change of velocities is:

\(v_f=v_o+at\)

Where:

a   = acceleration

vo = initial speed

vf  = final speed

t    = time

Solving the equation [for a:

\(\displaystyle a=\frac{v_f-v_o}{t}\)

The car accelerates from vo=0 to vf=60 mph in t=7.9 s, thus the acceleration is:

\(\displaystyle a=\frac{60 \ mph-0}{7.9}\)

a = 7.6\ mph/s

Answer:

A battery

Explanation:

A battery is the biggest conductor. I think.

Answer: 10.98 N

Explanation:

Given

mass of box is \(m=0.5\ slugs\approx 7.3\ kg\)

The coefficient of kinetic friction is \(\mu= 0.4\)

It is given that on the application of force box started moving with constant speed i.e. there is no net external force

\(\Rightarrow F+mg\sin 30^{\circ}=\mu mg\cos 30^{\circ}\\\Rightarrow F=mg(\mu \cos 30^{\circ}-\sin 30^{\circ})\\\Rightarrow F=7.3\times 9.8(0.866\times0 .4-0.5)=-10.98\ N\\\)

The negative sign indicates direction of force is opposite i.e. it must be applied upwards

If G = 0 and the forces are in equilibrium, then the net force on the object must be 0. This means that the sum of the forces must be 0. The values of F and α are 8N and -19.47° .

Force is a physical quantity that describes the interaction between two or more objects. It is a vector quantity, meaning it has both magnitude and direction. Forces can cause an object to accelerate, decelerate, change direction, or remain in its current state of motion. Some examples of forces include gravity, friction, and electromagnetic forces. Force is one of the most fundamental concepts in physics and is the basis of many physical phenomena. It is essential to understand forces in order to understand how the universe works.

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The equation of the path of a projectile is y = x(1 - x). Projectile motion is the movement of an object in a parabolic trajectory as a result of being propelled or released under the influence of gravity. A projectile, in simple terms, is any object that is launched into the air, such as a bullet, a baseball, or a rock. It's important to note that the parabolic trajectory is due to the force of gravity acting on the object.

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The value of the force, F₀, at equilibrium is equal to the horizontal

component of the tension in string 2.

Response:

Given:

The weight of the rod = The sum of the vertical forces in the strings

Therefore;

M·g = T₂·cos(37°) + T₁

The weight of the rod is at the middle.

Taking moment about point (2) gives;

M·g × L = T₁ × 2·L

Therefore;

\(T_1 = \mathbf{\dfrac{M \cdot g}{2}}\)

Which gives;

\(M \cdot g = \mathbf{T_2 \cdot cos(37 ^{\circ})+ \dfrac{M \cdot g}{2}}\)

\(T_2 = \dfrac{M \cdot g - \dfrac{M \cdot g}{2}}{cos(37 ^{\circ})} = \mathbf{\dfrac{M \cdot g}{2 \cdot cos(37 ^{\circ})}}}\)

F₀ = T₂·sin(37°)

Which gives;

\(F_0 = \dfrac{M \cdot g \cdot sin(37 ^{\circ})}{2 \cdot cos(37 ^{\circ})}} = \dfrac{M \cdot g \cdot tan(37 ^{\circ})}{2} \approx \mathbf{0.377 \cdot M \cdot g}\)

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Answer:

the ohms law says

Explanation:

ohm found that current, voltage, and resistance in a circuit are always related in the same day.

ohms obersivations

ohms found that if the factors that affect resistance are held constant, the resistance of most conductors does not depend on the voltage across them charging the voltage in a circuit changes the current but does not change the resistance regardless of the applied voltage. the ohms law resistance in a circuit is equal to voltage divided by current

resistance =current or voltage =current × resistance

Passing a current through a wire create a magnet because the electrons create a magnetic field.

Is it possible for a wire's current to generate a magnetic field?

Flemming's Right Hand Rule states that while a current flows, it generates a magnetic field all around it. The magnetic field produced by the wire's electric current will repel both poles of the magnet by bending away from the wire since it is changing directions around the wire. Magnetic fields are produced when moving electric charges (electrons in a circuit) move, and vice versa (electricity).

A wire heats up when a current flows through it because some of the electrical energy is transformed into heat energy due to resistance the wire encounters. This is referred to as the electric current's heating impact.

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Answer:

The end of the ramp is 38.416 m high

Explanation:

Horizontal Motion

When an object is thrown horizontally with an initial speed v and from a height h, it follows a curved path ruled by gravity.

The maximum horizontal distance traveled by the object can be calculated as follows:

\(\displaystyle d=v\cdot\sqrt{\frac {2h}{g}}\)

If the maximum horizontal distance is known, we can solve the above equation for h:

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

The skier initiates the horizontal motion at v=25 m/s and lands at a distance d=70 m from the base of the ramp. The height is now calculated:

\(\displaystyle h=\frac {70^2\cdot 9.8}{2\cdot 25^2}\)

\(\displaystyle h=\frac {4900\cdot 9.8}{2\cdot 625}\)

h= 38.416 m

The end of the ramp is 38.416 m high

Slope is rise over run, meaning the ratio of the change in height to the change in horizontal distance. So a slope of 15.80 corresponds to an angle of ascension θ of

tan(θ) = 15.80   →   θ ≈ 86.38°

The order of the blocks (i.e. whether the large one is pulling the smaller one up or vice versa) does not matter, since friction is not a concern. So if we take the connected blocks as a single mass, by Newton's law we have a net force acting parallel to the incline of

∑ F = P - (M + m) g sin(θ) = (M + m) a

(see the attached free body diagram)

where

P = magnitude of the push

g = 9.80 m/s²

a = 2.53 m/s²

and M and m are the given masses.

Then the system requires a push of

P = (M + m) (a + g sin(θ))

P = (14.2 kg + 4.73 kg) (2.53 m/s² + (9.80 m/s²) sin(86.38°))

P ≈ 233 N

If you have to find the tension in the rope, consider the free body diagram for one of the blocks. By Newton's second law, the net parallel force acting on, say, the larger block (if it's being pulled by the rope) is

∑ F = T - M g sin(θ) = M a

where

T = tension in the rope

Then

T = M (a + g sin(θ))

T = (14.2 kg) (2.53 m/s² + (9.80 m/s²) sin(86.38°))

T ≈ 175 N

Explanation:

J is amplitude

I is wavelength

K is trough

L is crest

M is midline

Answer:d

Explanation:

I think I've done this

Answer:

A objects have zero acceleration

Explanation:

I did this on Plato and it was right

1) The velocity of the pin after the collision is 107.4 m/s.

2) The velocity of the two cars as the collision is inelastic is 48.2 m/s.

We know that by the principle of the conservation of linear momentum, the momentum before Collison is equal to the total momentum after collision. Now we have to use this principle in the both questions that we have here.

1) Given that;

Total momentum before collision = Total momentum after collision

(41.7 * 59.1) + (4.17 * 0) = (41.7 * 48.35) + ( 4.17 * v)

We then have;

2464 + 0 = 2016 +  4.17v

2464 - 2016 = 4.17v

v = 2464 - 2016 /4.17

v = 107.4 m/s

2) Given that;

Total momentum before collision = Total momentum after collision

(51.3 * 50.1) + (100 * 47.2) = (100 +  51.3)v

2570 + 4720 = 151.3v

v = 2570 + 4720/151.3

v = 48.2 m/s

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A. The total momentum of the system after they push off is zero.

B. m1v1=m2v2

v2=m1v1/m2

v2=80*3.0/32

v2=7.5 m/s

in fact

m1v1=80*3= 240 kgm/s

m2v2= 32*7.5= 240 kgm/s.

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The larger deck gives more stability and power when skating. A big part of being a skater girl is looking like that which means wearing skate-branded shoes and clothes. Other skaters tend to wear these clothes cut to allow the skater's movement. Good skatesHer brands include Vans DC Nike especially basketball lines and Etnies I have.

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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.

\(\boxed{\sf \tau=rFsin\theta}\)

Put values

\(\\ \rm\hookrightarrow 40=2Fsin40\)

\(\\ \rm\hookrightarrow Fsin40=20\)

\(\\ \rm\hookrightarrow 0.64F=20\)

\(\\ \rm\hookrightarrow F=31.25N\)

The moment of force is 40 Nm here. The displacement is 2.5 m and the angle of inclination is 45°. The force about the pivot is then 28.2 N.

Moment of force is the product of the force and distance from a fixed axis. Moment of force can be calculated for both balanced and unbalanced forces.

The expression for moment of force relating the distance d and force f with an angle of inclination θ is written as below:

moment of force =  f d sin θ

Given that moment of force = 40 Nm

distance from the fixed axis from the figure =  2 m

angle of inclination = 45 °

40 Nm =   2 f sin 45.

20 = f sin 45

  f = 20 N / sin 45

    = 28.2 N

Therefore, the force about the pivot is 28.2 N.

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Answer:

the speed of the bullet before striking the block is 302.3 m/s.

Explanation:

Given;

mass of the bullet, m₁ = 28.3 g = 0.0283 kg

mass of the wooden block, m₂ = 5004 g = 5.004 kg

initial velocity of the block, u₂ = 0

final velocity of the bullet-wood system, v = 1.7 m/s

let the initial velocity of the bullet before striking the block = u₁

Apply the principle of conservation of linear momentum to determine the initial velocity of the bullet.

m₁u₁  +  m₂u₂  =  v(m₁  +  m₂)

0.0283u₁  + 5.004 x 0   =  1.7(0.0283  +  5.004)

0.0283u₁   =   8.5549

u₁ = 8.5549 / 0.0283

u₁ = 302.3 m/s

Therefore, the speed of the bullet before striking the block is 302.3 m/s.

Answer:

A drunk driver's car travel 49.13 ft further than a sober driver's car, before it hits the brakes

Explanation:

Distance covered by the car after application of brakes, until it stops can be found by using 3rd equation of motion:

2as = Vf² - Vi²

s = (Vf² - Vi²)/2a

where,  

Vf = Final Velocity of Car = 0 mi/h

Vi = Initial Velocity of Car = 50 mi/h

a = deceleration of car  

s = distance covered

Vf, Vi and a for both drivers is same as per the question. Therefore, distance covered by both car after application of brakes will also be same.

So, the difference in distance covered occurs before application of brakes during response time. Since, the car is in uniform speed before applying brakes. Therefore, following equation shall be used:

s = vt

FOR SOBER DRIVER:

v = (50 mi/h)(1 h/ 3600 s)(5280 ft/mi) = 73.33 ft/s

t = 0.33 s

s = s₁

Therefore,

s₁ = (73.33 ft/s)(0.33 s)

s₁ = 24.2 ft

FOR DRUNK DRIVER:

v = (50 mi/h)(1 h/ 3600 s)(5280 ft/mi) = 73.33 ft/s

t = 1 s

s = s₂

Therefore,

s₂ = (73.33 ft/s)(1 s)

s₂ = 73.33 ft

Now, the distance traveled by drunk driver's car further than sober driver's car is given by:

ΔS = s₂ - s₁

ΔS = 73.33 ft - 24.2 ft

ΔS = 49.13 ft