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Answer:

The nucleus has very important roles to play. As it contains genetic material, it coordinates cell activities like protein synthesis and cell division.

Explanation:

Answer:

The net force on a car traveling around a curve is the centripetal force, Fc = m v2 / r, directed toward the center of the curve.

Explanation:LET ME KNOW IF ITS WRONG. HAVE A NICE DAY!!!!!!!!!!

Answer: The net force on a car traveling around a curve is the centripetal force, Fc = m v2 / r, directed toward the center of the curve. The centripetal force is directed at right angles to the motion and also along the radius towards the centre of the circular path. In order for a car to move around a circular track, something must provide a centipetal force. One source of the centripetal force is friction between the tires and the road. This means that the tires do not need to supply any friction at all to keep the car from slipping sideways. ...

Hope this helps... stay safe and have a great day!!! :D

Answer:

The correct option is D. bloodstains

Answer:

Step-by-step-explanation :

Electric resistance

Dimension length :

Squared mass per time cubed , that is , electric current squared.

The SI derived unit of electric resistance is the ohm,(volt per ampere).

Answer:

Mass is 152.95743

weight in ibs 3304.6914215069355 ibs

EXPLANATION:

1500 N = 152.95743 KG

152.95743 KG × 9.8 = 1498.982814

1 KG is 2.2 IBS

so

14o8.982814 is 3304.6914215069355

Answer:

18.14m

Explanation:

Given parameters:

Frequency = [tex]\frac{22}{7}[/tex]cycles/s

Speed of wave = 57m/s

Unknown:

Wavelength  = ?

Solution:

The speed of a wave is related to frequency and wavelength using the expression below;

         V = f x λ

V is the speed of the wave

f is the frequency

λ is the wavelength

  Insert the parameters and find λ;

        57  =  [tex]\frac{22}{7}[/tex] x λ

       λ = 57 x [tex]\frac{7}{22}[/tex]   = 18.14m

Answer:

Electrons have more energy the farther they are from the nucleus.

Explanation:

A P E X

Answer:

Explanation:. The vending machine holds 10 bags of pretzels and 8 packs of cheese crackers.  Both the pretzels and crackers dispenseat 2 bags per hour. How many hours will elapse when there is the same number of snacks remaining in the vending machine?  How many of each item will there be at this point?Equation1______________________________Equation2_______________________________Hours: ___________________________ Items: ____________________________What does each equation have n common? ______________________How does this affect the solution?

Answer:

Acceleration is (48-14)/40 m/s² = 34/40 m/s² = 0.85 m/s²

The acceleration acting on the train during this time of travel is 0.85m/s²

HOW TO CALCULATE ACCELERATION:

Where;

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Answer:

Its velocity changes

Explanation:

When the truck changes direction, its velocity changes.

Velocity is a vector quantity that specifies the magnitude of motion and direction it is taking.

When direction changes, the velocity of a body will also change. This is unlike speed which is a scalar quantity.

 Velocity is the displacement divided by time taken.

Answer:

C

Explanation:

acceleration is a change in velocity which means a time rate change in velocity but velocity is the time rate change in displacement

Answer:

the force of gravity between them is quadrupled .

Explanation:

Since gravitational force is inversely proportional to the square of the separation distance between the two interacting objects, more separation distance will result in weaker gravitational forces.

Answer:

the total work done is 90J

Explanation:

the reason why is because you are the force (30 newtons) and the metere (3) so you will be multiplying those two numbers together.

W= FD 30(3)= 90J

Answer:

striking and fielding

Explanation:

striking and fielding

Answer:

(a) h = 16.53 m (b) t = 1.83 s

Explanation:

Given that,

The initial velocity of a ball, u = 18 m/s

When it reaches to the maximum height, its final velocity v will be 0. Let it goes to a maximum height of h meters.

Finding t using first equation of motion as follows :

v = u +at

Here, a = -g and v = 0

[tex]t=\dfrac{u}{g}\\\\t=\dfrac{18}{9.8}\\\\t=1.83\ s[/tex]

The time needed for the ball to reach its max height is 1.83 s.

Let h is the maximum height. Using second equation of motion to find it :

[tex]h=ut-\dfrac{1}{2}gt^2\\\\h=18(1.83)-\dfrac{1}{2}\times 9.8\times (1.83)^2\\\\h=16.53\ m[/tex]

So, it will go to a maximum height of 16.53 m.

Answer:

W = 1710 kJ

Explanation:

Given that,

Power of a race car, P = 255 hP = [tex]1.9\times 10^5\ W[/tex]

It accelerate from rest to its top speed in 9.00 s.

We need to find the work does the car's engine do in this interval of time.

Power is given by work done per unit time. Mathematically,

[tex]P=\dfrac{W}{t}\\\\W=P\times t\\\\W=1.9\times 10^5\times 9\\\\W=1710\ kJ[/tex]

So, the required work done is is 1710 kJ.

Answer: The motions shifts.

Answer: A.

Explanation:

took the test just now

A battery supplies electrical energy to a circuit Chemical reactions in a battery cause positively and negatively charged particles to separate and become concentrated at the battery terminals. The correct option is A.

A chemical reaction is a process in which one or more substances, also known as reactants are converted to one or more different substances, known as products. A chemical reaction rearranges the constituent atoms of the reactants to create different substances as products

Chemical reactions in a battery cause positively and negatively charged particles to separate and become concentrated at the battery terminals resulting in the transformation into electrical energy therefore the correct option is A.

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In a battery (voltaic cell), the electrons flow from the negative to the positive terminal.

Electric current is defined as the rate of flow of electric charge through any cross-section in an electric circuit.

Here,

1) In a battery (voltaic cell), the electrons flow from the negative to the positive terminal.

2) Some materials are not magnetic because, they have equal number of electrons that spin in opposite direction. Thus, the paired electrons spin in opposite directions, cancelling their magnetic fields.

3) According to Right-hand thumb rule, if Keisha's thumb points in the direction of an electrical current, her fingers curled around the wire will represent the direction of magnetic field.

4) Resistance of the light bulb, R = 20 Ω

   Current flowing through the light bulb, I = 30 A

Voltage of the battery,

V = IR

V = 30 x 20

V = 600 V

5) The deflection in the needle of the compass is due to the change in the Earth's magnetic field.

6) The batteries are not able to power all three light bulbs like the generator because, the generator current is more steady.

7) The attraction of the metal objects towards the electrical device is due to an electrical wave oscillating perpendicular to the electrical device.

8) Current in the first tablet, I₁ = 10 A

Voltage applied, V = 150 V

We know that,

I [tex]\alpha[/tex] 1/R

Therefore,

I₁/I₂ = R₂/R₁

I₂ = R₁I₁/R₂

I₂ = R x 10/2R

I₂ = 10/2 = 5 A

So, the current of the second tablet is 5 A.

Hence,

In a battery (voltaic cell), the electrons flow from the negative to the positive terminal.

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Answer:

The mechanical advantage of a machine is 2. Mechanical advantage MA is the ratio of output (generated by the machine) force to input (applied to the machine) force. So MA = 2 means that for example if you apply 100 N then your machine will multiply that force and generate 200 N .

Answer: 2 m/s is the answer

Explanation:

The wire that lies within a magnetic field must be true for the magnetic field to produce an electric current in the wire is, and the field must be moving. Hence, option C is correct.

Magnetic forces can be seen in a magnetic field, an electric current, a changing electric field, or a vector field around a magnet. Compass blades and other ferromagnetic materials align in the path of magnetic fields like the one found on Earth.

Electrically charged particles are forced to move in a circular or helical pattern by magnetic fields. The operation of electric motors is caused by this force, which is applied to electrical impulses in wires in such a magnetic field.

Magnetization is stationary and is referred to as a magnetization field when it surrounds a magnetic core or a wire delivering a constant electric current in a single direction.

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Answer:

The field must be moving (C)

Initial speed of the car (u) = 15 m/s

Final speed of the car (v) = 0 m/s (Car comes to a complete stop after driver applies the brake)

Distance travelled by the car before it comes to halt (s) = 63 m

By using equation of motion, we get:

[tex] \bf \longrightarrow {v}^{2} = {u}^{2} + 2as \\ \\ \rm \longrightarrow {0}^{2} = {15}^{2} + 2 \times a \times 63 \\ \\ \rm \longrightarrow 0 = 225 + 126a \\ \\ \rm \longrightarrow 126a = - 225 \\ \\ \rm \longrightarrow a = - \dfrac{225}{126} \\ \\ \rm \longrightarrow a = - 1.78 \: m {s}^{ - 2} [/tex]

[tex] \therefore [/tex] Acceleration of the car (a) = -1.78 m/s²

Magnitude of the car's acceleration (|a|) = 1.78 m/s²

Answer:

m = 5 [mg]

Explanation:

We must remember that the definition of linear momemtum is defined as the product of mass by distance.

P = m*v

P = momentum = 40 [mg*m/s]

m = mass [mg]

v = velocity = 8 [m/s]

Now clearing m:

m = P/v

m = 40/8

m = 5 [mg]

Answer:

The way in which objects exert forces on each other is described by Newton’s 3rd law of motion

Explanation:

Objects with mass exert forces on each other via the force of gravity. This force is proportional to the mass of the two interacting objects and is inversely proportional to the square of the distance between them. The factors G, M, and rare the same for all masses at the surface of the Earth.