A book sits on a table, without moving, for two months.

In those two months:

a net force acted on the book
only gravity acted on the book
no net forces acted on the book
no forces acted on the book

Answer:

yes u can flag football has everything that pad football has so you can enlist on being offensive position but you have to play like you want that position

Explanation:

Answer:

The right approach is "8.1 m/s". A further explanation is provided below.

Explanation:

According to the table,

Speed of Boat

= \(\frac{s}{t}\)

\(V_b=\frac{140}{20}\)

\(V_a = 4 \ m/s\)

\(V_B = 7 \ m/s\)

Now,

⇒  \((V_{relative})^2 = (7)^2+(4)^2\)

or,

⇒  \((V_r)^2=49+16\)

              \(=65\)

         \(V_r=\sqrt{65}\)

              \(=8.1 \ m/s\)

Answer is.

(B) 10 seconds

Explanation:

A car's engine generates 100,000 W of power as it exerts a force of 10,000 N.

Power = 100,000 W

Force = 10,000 N

We have been give to find out that How long does it take the car to travel 100 m?

Distance or displacement = 100 m

Time = ?

Work done = Force × displacement.

Work done = 10,000 × 100

Work done = 100,000 joules.

Energy is calculated by,

\( E = power \times time \)

\( 10,000 = 100,000 \times t \)

\( t = \dfrac{1000,000}{10,000} \)

\( t = 10 sec \)

Hence it will take 10 seconds for the car to travel 100 m.

The mass of Brachiosaurus moves with a momentum of 134,054 kgm/s  and the velocity is 3.9 m/s, which is 34.37 kg.

The momentum is the product of mass and velocity. The momentum is the vector quantity and the unit of momentum is Kgm/s.

Momentum = mass × velocity

 mass    = momentum/velocity

momentum =  134,052 kgm / s

velocity = 3.9 m/s

mass = 134052 / 3.9

         = 34.37 kg

Thus, the mass of Brachiosaurus is 34.37 kg.

To learn more about Momentum :

https://brainly.com/question/30677308

#SPJ1

Answer:

D. violet

Explanation:

think of a UV light

Answer:

Explanation:

The reason why the nucleus does not blow itself apart is because of the strong nuclear force. The strong nuclear force is stronger than the electrostatic repulsion between protons.

(i) Mass defect is the difference between the mass of an atom and the sum of the masses of its constituent particles.

(ii) Binding energy is the energy required to separate an atomic nucleus into its constituent nucleons.

(a) The mass defect of deuteron H is (mass of 1 proton + mass of 1 neutron) - mass of deuteron H = (1.6726 x 10^-27 kg + 1.6749 x 10^-27 kg) - 3.3435 x 10^-27 kg = 0.004 x 10^-27 kg.

(b) The binding energy of deuteron H is equal to the mass defect multiplied by the speed of light squared (c^2) divided by the Avogadro constant (NA) multiplied by 1 million (MeV conversion factor). Thus, the binding energy of deuteron H is (0.004 x 10^-27 kg) x (3 x 10^8 m/s)^2 / (6.022 x 10^23 mol^-1) x 10^6 = 2.224 MeV.

Answer: Limestone Caves

Explanation: The most common feature that can be caused purely by chemical weathering is Karst Landscape, which can lead to caverns and sinkholes.

Answer:

Explanation:

The magnitude of the electric force on this charged particle A depends upon the following

5. the distance between the point charge Q and the charged particle A

8. the amount of the charge on the point charge Q

9. the magnitude of charge on the charged particle A

a) Cart is speeding up ; b) cart is slowing down and c) cart is not moving.

Force of friction is a contact force whereas friction is the force that resists motion when surface of one object comes in contact with surface of another. Example is the force of friction between two stones rubbed with each other.

Static friction magnitude is directly proportional to normal force magnitude and the roughness between sliding surfaces. The ratio of magnitude of frictional force divided by normal force magnitude is called as coefficient of friction. Friction takes place at the point of contact between two bodies.

To know more about frictional force, refer

https://brainly.com/question/24386803

#SPJ1

Answer:

Absolute magnitude

Explanation:

The brightness a star would have if it were at 10 pc from Earth is called Absolute magnitude.

A. All living things and objects

Answer:

A: All living things and objects. I Hope This Helped!

Explanation:

Describes Matter.

The energy transferred in Joules by the radio when it has been switched on for 2 minutes would be 6000 Joules.

Power is defined as the rate of energy transfer or the rate at which work is done, and is given by the equation:

Power = Energy transferred / Time

Rearranging the equation to solve for energy transferred, we get:

Energy transferred = Power x Time

We are given:

Power = 50 W

Time = 2 minutes = 120 seconds

Therefore, the energy transferred by the radio when it has been switched on for 2 minutes is:

Energy transferred = Power x Time = 50 W x 120 s = 6000 J

In other words, the energy transferred by the radio is 6000 Joules.

More on energy transfer can be found here: https://brainly.com/question/18649915

#SPJ1

The car is moving at approximately 12.5 meters per second.

The kinetic energy (KE) of an object can be calculated using the formula:

KE = 1/2 * m * \(v^2\)

where

KE = kinetic energy,

m =Mass of the object, and

v = velocity.

In this case, we are given the mass (m) of the car as 1600 kg and the kinetic energy (KE) as 125,000 J. To find the velocity .

Substituting the  values , we have:

125,000 J = 1/2 * 1600 kg *\(v^2\)

Now, we can solve for v by rearranging the equation:

\(v^2\) = (2 * 125,000 J) / 1600 kg

\(v^2\) = 156.25 \(m^2/s^2\)

Taking the square root, we find:

v = √156.25\(m^2/s^2\)

v ≈ 12.5 m/s

Therefore, the car is moving at approximately 12.5 meters per second.

Know more about   kinetic energy  here:

https://brainly.com/question/8101588

#SPJ8

Answer:

The correct solution is "122.2211".

Explanation:

Given:

deceleration,

a = 22 ft/sec²

Initial velocity,

\(V_i=50 \ m/h\)

Now,

\(V_i=50 \ m/h\times 5280 \ ft/m\times hr/3600 \ s\)

    \(=73.333 \ ft/sec\)

Now,

Final velocity,

\(V_f=0\)

Initial velocity,

\(V_{initial} = 73.333 \ ft/sec\)

hence,

⇒ \(V_f^2=V_i^2+2aD\)

By putting the values, we get

      \(0=(73.333)^2+2\times( -22) D\)

  \(44D=(73.333)^2\)

      \(D=\frac{(73.333)^2}{44}\)

          \(=122.2211\)

The expression for the initial velocity at point A is:

0 = (velocity at point A - 0) / time

Simplifying the equation, we find:

Velocity at point A = 0

The initial velocity at point A is zero, indicating that the object starts from rest before sliding on the horizontal plane AB.

To write an expression for the initial velocity at point A, we need to analyze the forces acting on the object and apply the principles of motion.

Given:

Mass of the object, m

Radius of the semi circle, R

Coefficient of kinetic friction, μ\(_k\) = 0.5

Force applied at point C, F = 3mg

The object is initially at rest.

Let's break down the motion into two parts: the motion on the horizontal plane AB and the motion along the semi circle BCD.

1. Motion on the horizontal plane AB:

The only force acting on the object on the horizontal plane is the force of kinetic friction. The frictional force can be calculated using:

Frictional force, f = μ\(_k\)* Normal force

The normal force is equal to the weight of the object, which is mg.

Normal force, N = mg

Frictional force, f = μ\(_k\) * mg

The frictional force acts in the opposite direction to the motion, so its magnitude is negative. Thus, the net force on the object on the horizontal plane is:

Net force = -f = -μ\(_k\)* mg

Using Newton's second law, we can relate the net force to the acceleration:

Net force = mass * acceleration

-μ\(_k\) * mg = m * acceleration

The acceleration can be expressed as the rate of change of velocity:

Acceleration = (final velocity - initial velocity) / time

Since the object is initially at rest, the initial velocity is zero.

For more such information on: velocity

https://brainly.com/question/80295

#SPJ8

The wavelength of the wave shown in the image is approximately 0.0018 m.

we can see that there are two points marked as "A" on the string, which represents two consecutive peaks of the wave. The distance between these two points is 45 m.

The wavelength of a wave is the distance between two consecutive peaks or troughs of the wave. Therefore, in this case, the wavelength is simply the distance between the two points marked as "A".

Using the ruler provided in the image, we can measure the distance between the two points marked as "A" to be approximately 0.18 cm. However, this measurement is not in meters, which is the standard unit for measuring wavelength.

To convert the measurement to meters, we need to divide it by 100, since there are 100 centimeters in 1 meter. Therefore, the distance between the two points marked as "A" is:

0.18 cm ÷ 100 = 0.0018 m

So the wavelength of the wave shown in the image is approximately 0.0018 m.

learn more about wavelength here

https://brainly.com/question/10728818

#SPJ1

Answer:

There are 5 general layers; organism, population, community, ecosystem, and biosphere.

Explanation:

Hope this helps!

Answer:

currrent will be halved

Explanation:

v = ir

v/r = i      multiply both sides by  1/ 2

v / (2r) = 1/2 i  

Answer:

The below diagram shows pure spectrum with white light

Explanation:

Answer:

B. Myron increased the friction by increasing speed.

Explanation:

i got it correct on edge

Answer:

The answer is B i think

Explanation:

Answer:a car with 1,000kg

Explanation: A car with a mass of 1,000kg has more inertia than 150 kg

Out of the two objects a 1000-kilogram car and a 150-kilogram golf cart, the 1000-kilogram cart will have more inertia as the inertia of any object is directly proportional to its mass.

According to Newton's first law, until pushed to alter its condition by the intervention of an external force, every object will continue to be at rest or in uniform motion along a single direction.

The larger the mass of the object, the greater would be the inertia of the object.

Thus, a 1000-kilogram automobile will have higher inertia than a 150-kilogram golf cart since any object's inertia is directly proportionate to its mass.

Learn more about Newton's First Law here, refer to the link given below;

brainly.com/question/1222214

#SPJ2

Answer: Fuel is burned in engines to make the motor move.

( Chemical to Mechanical )

Explanation:

during combustion of the diesel ( when the fuel is burnt in the engine of the vehicle, the diesel ( chemical energy ) is transformed or converted to Mechanical energy. This mechanical energy is what the truck uses in moving. Without the combustion of the fuel the vehicle won’t move and the combustion of diesel is achieved through compression unlike that of fuel.

The airplane starts form rest, then accelerates by rate of \(3m/s^2\) until it reaches 102m/s at the end of the runway. so we have:

\(Vo=0m/s\\Vf=102m/s\\a=3m/s^2\\\\\)

From the equations of uniformly accelerated motion (since the airplane's acceleration is uniform) \('Vf^2=Vo^2+2aS' \\\) is compatible to find the minimum runway length (S).

\(Vf^2=Vo^2+2aS\\Vf^2-Vo^2=2aS\\S=Vf^2-Vo^2/2a\\\)

\(S=((102m/s)^2-(0m/s)^2)/2m/s^2\\S=(10404m^2/s^2-0m^2/s^2)/2m/s^2\\S=(10404m^2/s^2)/2m/s^2\\S=5202m\)

1.Unit vector in the direction BA: BA/|BA| = (2/3, 2/3, 1/3)

2.The angular velocity (ω) of the body is given as 3 radians per second.

3.Without the position of point P given, it is not possible to write the position vector of P.

4.Left-handed rotation refers to the direction of rotation where the rotation follows the left-hand rule.

5.Position vector of point A: (4, 1, 1)

Position vector of point B: (2, -1, 0)

The direction vector BA = (-2, -2, -1)

1.To determine the unit vector pointing in the direction BA, we subtract the coordinates of point B from the coordinates of point A and normalize the resulting vector.

The direction vector BA is given by:

BA = (4 - 2, 1 - (-1), 1 - 0) = (2, 2, 1)

To obtain the unit vector in the direction of BA, we divide the direction vector by its magnitude:

|BA| = √(2^2 + 2^2 + 1^2) = √(4 + 4 + 1) = √9 = 3

Unit vector in the direction BA: BA/|BA| = (2/3, 2/3, 1/3)

2.The angular velocity (ω) of the body is given as 3 radians per second.

3.Without the position of point P given, it is not possible to write the position vector of P. Please provide the position of point P to proceed with the calculation.

4.Left-handed rotation refers to the direction of rotation where the rotation follows the left-hand rule. In a left-handed coordinate system, if you curl the fingers of your left hand in the direction of rotation, your thumb will point in the direction of the rotation axis. It is the opposite direction to a right-handed rotation.

5.The position vectors of points A and B are:

Position vector of point A: (4, 1, 1)

Position vector of point B: (2, -1, 0)

The direction vector BA can be obtained by subtracting the coordinates of point A from the coordinates of point B:

BA = (2 - 4, -1 - 1, 0 - 1) = (-2, -2, -1)

For more such questions on vector

https://brainly.com/question/30895553

#SPJ8

The height of the 4 kilograms book with a gravitational potential energy of 98 Joules is approximately 2.5 meters.

Gravitational potential energy is simply the potential energy an object possessse in relation to another object due to gravity.

It is expressed as;

U = m × g × h

Given that:

Gravitational potential energy of the book U = 98 Joules

Mass of the book m = 4 kilograms

Acceleration due to gravity g = 9.8 m/s²

Height h = ?

Plug these values into the above formula and solve for height.

U = m × g × h

h = U / ( m × g )

h = 98  / ( 4 × 9.8 )

h = 98/39.2

h = 2.5 meters

Therefore, its height is 2.5 meters.

Learn more about gravitational potential energy here: brainly.com/question/3884855

#SPJ1

Answer:

Galileo thought that a ball, rolling or sliding down a hill without friction, would run up to the same height on an opposite hill.

Suppose that the opposite hill was horizontal. Would the ball's motion continue forever along the tangent, or forever parallel to the Earth's surface

Galileo's conclusion from this thought experiment was that no force is needed to keep an object moving with constant velocity.

Newton took this as his first law of motion.

Explanation:

Here ya go-

Answer:

m=image distance÷object distance

Answer:

Explanation is given

Mark Me as Branliest

bicycle goes in a circle to go forward

Answer:

D. is the correct answer.

Explanation:

We can use sin cos tan method to solve Mx:

\(\frac{Mx}{5}=cos(37)\)

\(Mx= cos(37) * 5\)

\(Mx = 4\)

So Mx should be 4 and head to right. as its positive.

We can use sin cos tan method to solve My:

\(\frac{My}{5} = sin(37)\)

\(My = sin(37) * 5\)

\(My = 3\)

So My should be 3 and head to upwards. as its positive.

Final conclusion: D. is the correct answer.