Which type of force is a noncontact force?
O A. Buoyancy
O B. Any normal force
O C. Air resistance
O D. Any fundamental force

Answer:

Infilteration

Answer:

t = 0, p = 12.0, v = 6.00

t = 20, p = 112, v = 56.0

t = 25, p = 62.0, v = 31.0

Explanation:

Impulse = change in momentum

J = Δp

FΔt = mΔv

The impulse equals the area under the F vs t graph.

At t = 0 s, the initial velocity is 6.00 m/s, so the momentum is:

p = (2.00 kg) (6.00 m/s)

p = 12.0 kg m/s

From t=0 s to t=20 s, the impulse is:

J = (20 N) (5 s) + ½ (20 N) (5 s) + ½ (-10 N) (10 s)

J = 100 Ns

So the new momentum is:

p = 12.0 kg m/s + 100 kg m/s

p = 112 kg m/s

And the new velocity is:

v = (112 kg m/s) / (2.00 kg)

v = 56.0 m/s

From t=20 s to t=25 s, the impulse is:

J = (-10 N) (5 s)

J = -50 Ns

So the new momentum is:

p = 112 kg m/s − 50 kg m/s

p = 62.0 kg m/s

And the new velocity is:

v = (62.0 kg m/s) / (2.00 kg)

v = 31.0 m/s

Answer:

Explanation:

0m x96 would put as an mass of 900 into 0 so there for your answer would be 0

Answer:

Explanation:

Area of the room = Length × Width

Given

Length = 12.71m

Width = 5.46m

Area of the room = 12.71m×5.46m

Area of the room = 69.3966m²

To get the area of the error, we will use the relationship;

∆A/A = {∆L/L + ∆W/W}

∆A/A = {0.01/12.71 + 0.01/5.46}

∆A/A = {0.0007868+ 0.001832}

∆A/A = 0.0026182

∆A = 0.0026182A

Since Area A = 69.3966m²

∆A = 0.0026182(69.3966)

∆A ≈ 0.1817m²

Hence error in the area of the room is 0.1817m²

Answer:

25 m/s

Explanation:

First we should define the variables

T=4

Dx = 100

ay=-9.8

ax=0

We can use formula 1 from the BIG 5

x=(v+v0)t/2

By plugging in our variables we can get 100=4(v+v0)/2

Which is 50=v+v0

v=v0 since horizontal acceleration always equals zero

so 2v0 = 50

v0 = 25

Answer:

The answer is 0.5m/s²

Explanation:

Acceleration=Force ÷mass

= 5÷10=0.5m/s²

Projectile Motion for an Object Launched at an Angle

When an object is projected from rest at an upward angle, its initial velocity can be resolved into two components. These two components operate independently of each other. The upward velocity undergoes constant downward acceleration which will result in it rising to a highest point and then falling backward to the ground. The horizontal motion is constant velocity motion and undergoes no changes due to gravity.The analysis of the motion involves dealing with the two motions independently.

Explanation:

and Thais

Projectile Motion for an Object Launched at an Angle

When an object is projected from rest at an upward angle, its initial velocity can be resolved into two components. These two components operate independently of each other. The upward velocity undergoes constant downward acceleration which will result in it rising to a highest point and then falling backward to the ground. The horizontal motion is constant velocity motion and undergoes no changes due to gravity.The analysis of the motion involves dealing with the two motions independently.

Projectile Motion for an Object Launched at an Angle

When an object is projected from rest at an upward angle, its initial velocity can be resolved into two components. These two components operate independently of each other. The upward velocity undergoes constant downward acceleration which will result in it rising to a highest point and then falling backward to the ground. The horizontal motion is constant velocity motion and undergoes no changes due to gravity.The analysis of the motion involves dealing with the two motions independently.

Answer:

Micrometers provide very accurate measurements

The micrometer is one of the most accurate types of measuring device.

Most micrometers can measure up to 0.001mm or 0.0001 inches.

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Ratchet speeder helps to provide reliable measurements

The ratchet speeder/stop mechanism ensures that uniform pressure is applied to the thimble so that measurements are reliable and repeatable.

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Explanation:

Answer:

3rd sentence

Explanation:

The positive charge with the highest magnitude is +2 C and this charge would be most strongly attracted by object A.

Opposite charges have the ability to attract each other while, similar charges repel each other.

The given charge of object A is negative, and it will be strongly attracted to a positive charge.

The greater the positive charge, the greater the force of attraction of object A.

From the given options, the positive charge with the highest magnitude is +2 C and this charge would be most strongly attracted by object A.

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Answer:

Explanation:

Let when cat reaches the point L distance from the right end , the plank starts turning about the left sawhorse.

The weight of the plank will at at middle point , ie at 2 m from the right end .

The plank will turn about the left sawhorse . Taking torque about this point of weight of the plank and weight of the cat , we have

2.5 g x ( L - 2.4 ) = 6 x g x ( 2.4 - 2.0 )

2.5 L - 6 = 14.4 - 12

2.5 L = 8.4

L = 3.36

position from left sawhorse = 3.36 - 2.4 = .96 m to the left of left sawhorse.

Answer:

Explanation:

e Sun and planets began to form in a rotating cloud of nebular gas and dust. These materials eventually clumped together with a hot protosun at the center and chunks of planetesimals rotating around it. Through repeated collisions, the planetesimals grew into protoplanets, and eventually the solar system came about.

The sequence of the solar system formation is started from sun and the planet's origination 4.6 billion years ago from the solar nebula, a cloud of gas and dust.

The solar system consists of the planet's satellites, as well as numerous comets, asteroids, and meteoroids, as well as the interplanetary medium.

The Sun and planets formed in a revolving cloud of nebular gas and dust. These components finally clumped together, creating a hot proton in the middle with fragments of planetesimals orbiting around it.

Planetesimals developed into protoplanets as a result of repeated collisions, and the solar system finally formed.

Hence,the sequence of the solar system formation is started from sun and the planet's origination 4.6 billion years ago from the solar nebula, a cloud of gas and dust.

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The name of the area around a charged object where the object can exert a force on other charged objects will be the electric field. Option A is correct.

An electric field is an electric property that is connected with any location in space where a charge exists in any form. The electric force per unit charge is another term for an electric field.

The electric field formula is as follows:

E = F /Q

Where,

The electric field is denoted by the letter E.

F is the electric force

The charge is Q.

The name of the area around a charged object where the object can exert a force on other charged objects will be the electric field.

Hence option A is correct.

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Blake can determine the center mass by dividing the product of less dense and its position by the sum of the two end densities.

The center mass of an object is the point on the object where the weighted relative position of the distributed mass sums to zero.

Blake can determine the location of the center mass as follows;

[tex]C_{xm }= \frac{\rho_1 (0) + \rho(x)}{\rho_1 + \rho_2} \\\\C_{xm }= \frac{\rho(x)}{\rho_1 + \rho_2}[/tex]

Thus, Blake can determine the center mass by dividing the product of less dense and its position by the sum of the two end densities.

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Answer:

5

Explanation:

when you move 3 unit to the right your object is at 3.then when you move 4 units to the left your object is at -1 because

a number line also has negative numbers.Then if you move 6 units your object is at 5

Answer:

It will remain in straight-line motion at constant speed until acted on by an

external force. Moreover, it'll not only tend to do that ... it'll actually do it.

Explanation:

Answer:

D/B ahs units of  Length over Time

Explanation:

Notice that B is multiplying "x" (displacement) as argument of the sine function, therefore it has to have units of the reciprocal of Length.

Also the constant D is multiplying "t" as argument of the sine function, and as such, it must have units of the reciprocal of time.

Therefore, the quantity D/B must have units of Length over Time.

Answer:

I = 0.25  AND  T= 4 HOURS, Q = ??  

 multiply  both min  and sec , 240 and 60

we get 1400 sec  

the formula for current is   I = Q/T

substitute the given data in the formula  and simplify it

so , Q = 3600C  

Answer:

it is the white rhinoceros because it weighs more then the bullet all though the bullet travels faster once the rhino gets running it is hard to stop because it weighs so much

Answer:

Ek = 192000 [J]

Explanation:

Originally missing speed data to solve this problem, we must assume that the original speed is 20 [m/s]. In this way, we can calculate the mass of the object.

48000 = (1/2)*m*(20)^2

m = 240 [kg]

The mass is conserved since it does not change only changes the speed of the body so we can calculate a new kinetic energy.

Ek = (1/2)*240*(40)^2

Ek = 192000 [J]

Answer:

The less energy a wave has, the smaller the amplitude

Explanation:

Hope this helps!!!

Answer:

B. The effect that a magnetic field has on an object depends on the material of the object.

Explanation:

Just makes sense

Based on the data given in the table, the best argument the student can make about magnetic fields is that b. The effect that a magnetic field has on an object depends on the material of the object.

Certain objects have properties that make them easier to be magnetizable than other materials. Crayons and wooden toothpicks for instance, are not magnetizable.

The conclusion that can be made therefore is that the effect of a magnet on an object depends on the material of the object.

In conclusion, option B is correct.

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Answer:

[tex]P=3.61\times 10^{-3}\ Pa[/tex]

Explanation:

Given that,

Mass of a brick, m = 3.1 kg

The dimensions of the brick 225 m x 112 m x 75 m

We need to find the maximum pressure created by the brick. We know that, the force acting per unit area is called pressure exerted. It is given by the formula as follows :

[tex]P=\dfrac{F}{A}[/tex]

F = mg

A = area with minimum dimensions i.e. 112 m x 75 m

Pressure is maximum when the area is least.

So,

[tex]P=\dfrac{mg}{A}\\\\P=\dfrac{3.1\times 9.8}{112\times 75}\\\\P=3.61\times 10^{-3}\ Pa[/tex]

So, the maximum pressure created by brick is [tex]3.61\times 10^{-3}\ Pa[/tex].

Answer:

similarities: They are both members of an action reaction-pair and are produced by electromagnetic forces between the particles. In the case of tension a force is acting to separate the molecules from their equilibrium position, the tension is the resistance to this separatio; that is the electrical attraction among the charged particles that opposes the action of the applied force. In the case of the normal force when gravity pulls an object downward, the electrons of the two surfaces are pulled so close that they mutually reject each other. This rejection between the electrons of the 2 surfaces produces the normal force, acting in opposition to gravity.

Differences: The main difference between tension and force is the direction of force. ... Tension is a force pulling something apart, such as a force pulling apart on the ends of a rope. You often calculate tension in pulley problems. A force is a more general term applying to pushing or pulling on something.

Explanation:

i hope this helps you :)

Answer:

you had probably died from the impact

Explanation:

because you got rolled over you would probably died due to your organs being damage and wouldn't function properly

Answer:

a = 0.0505 [m/s^2]

Explanation:

In order to solve this formula we must use the following formula of kinematics.

[tex]x=(v_{o} *t)+(\frac{1}{2} )*a*t^{2}[/tex]

where:

x = distance = 50000 [m]

Vo = initial velocity = 0

a = acceleration [m/s^2]

t = time = 23 [min] = 1380 [s]

Note: the positive sign in the above equation shows that the car accelerates.

50000 = (0*1380) + (0.5*a*1380^2)

a = 0.0525 [m/s^2]

But we can calculate the acceleration using the following formula:

[tex]v_{f} =v_{o} +a*t[/tex]

where:

Vf = final velocity = 67 [m/s]

67 = 0 + (a*1380)

a = 0.0485 [m/s^2]

We can see that by means of kinematics and with the given values we can find two values of accelerations, however, we can determine the average acceleration, by means of the mathematical average.

a = (0.0485 + 0.0525) / 2

a = 0.0505 [m/s^2]

Answer:

c. Total energy

Explanation:

An "orbit" is a path for an object to follow. An example of an object is the "satellite."

At certain points in the orbit, the satellite increases its speed and decreases its speed in relation to the gravity caused by the Earth. As it moves farther away from the Earth, its speed slows down. So, this means that the kinetic energy changes. It also gains and loses height which is responsible for the changes occurring regarding potential energy. This is true for elliptical motion of satellites.

However, the total mechanical energy (TME) of the satellite remains the same or is unchanged (elliptical/circular).

Answer:

-42 kJ

Explanation:

Q = ΔE + W

W = -63.0 kJ

Q = -105 J

so -105 = ΔE + (-63)

ΔE = 63 - 105 = -42 kJ

A system does the work of 63 kJ and releases 105 kJ of heat, then the change in internal energy will be -42 kJ.

When a thermodynamic system's boundary is crossed by a form of energy due to a temperature differential, that form of energy is referred to as heat. Heat is not present in thermodynamic systems.

In the right-hand image, a metal bar is "conducting heat" from its hot end to its cold end. However, if the metal bar is thought of as a thermodynamic system, then the energy moving within the metal bar is what is being described as "conducting heat" instead is called internal energy.

Q = Δ E + W

W = -63.0 kJ

Q = -105 J

Then,

-105 = Δ E + (-63)

ΔE = 63 - 105 = -42 kJ

Therefore, the change in internal energy will be -42 kJ.

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Answer: Topsoil

Explanation:

Bio

Answer:

topsoil

Explanation: