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Basile [38]
3 years ago
15

James took two pea plants, placing one in a dark closet and the other on a sunny window sill. both are located in air-conditione

d rooms. he then measured the growth of the pea plants after a week. In this experiment, the dark closet is a(n)_____
A. Dependent variable


B. Constant


C. Independent variable


D. Control
Physics
1 answer:
dedylja [7]3 years ago
5 0

Answer:

C) independent variable.

Explanation:

the control was or would be the plant at the window. the dependent is the growth of each plant. the constant is the amount of water

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What does the subscript 2 indicate in the compound MgCl2?
tresset_1 [31]
It means there are two chlorine molecules and there is only one magnesium molecule (because no subscript really just means there is an invisible 1 that isn't listed).
4 0
3 years ago
Read 2 more answers
A long straight wire carries current to the right of the page. A rectangular loop is positioned directly under the wire in the p
slavikrds [6]

Answer:

Correct option A.

The net force exerted by this loop on the straight wire with the current is directed TOWARDS THE LOOP

Explanation:

The magnetic field exerts a force on a current-carrying wire in a direction given by the right-hand rule 1 (the same direction as that on the individual moving charges). This force can easily be large enough to move the wire since typical currents consist of very large numbers of moving charges.

Given that,

The wire's current is directed towards the right of the page.

The rectangular loops carry current in a clockwise direction.

Since the 'dot' field is increasing hence the induced magnetic field is 'cross', i.e. into the page and by the right-hand rule, the induced current is clockwise.

Then the magnetic field is into the page.

Since was known that

F= iL×B

Note the current is through the wire. Then, the length is in direction of the current.

Note: this equation gives the magnetic force that acts on a length L of a straight wire carrying a current (i) and immersed in a uniform magnetic field (B), that is perpendicular to the wire.

So, the magnetic field is always perpendicular to the current.

So using right hand rule,

F = i(L×B)

The length is to the right i.e. +x direction and the Magnetic field is perpendicular to the plane, i.e. in the +z direction

F = i (L•i × B•k)

F = iLB (i×k)

F = iLB•(-j)

F = -iLB•j

Then, the force is in the negative y-direction i.e. towards the loop.

8 0
3 years ago
S GP A projectile of mass m moves to the right with a speed vi (Fig. P11.51a). The projectile strikes and sticks to the end of a
Andrews [41]

What is the kinetic energy of the system after the collision?

K_f=\frac{3}{2} \frac{m^{2}v_i^{2}  }{(M+3m)}

How this is calculated?

Given:

Initial speed=v_i

mass of rod=M

Let, Initial kinetic energy =K_i

Final kinetic energy=K_f

Moment of inertia =I

What is the moment of inertia?

I=(I_p)_0+(I_{rod})_0\\I=m(\frac{d}{2})^{2}  +\frac{Md^{2} }{12} \\I=\frac{(M+3m)d^{2} }{12}

What is the angular momentum?

By conservation of angular momentum,

L_i=L_f

mv_i\frac{d}{2}=\frac{(M+3m)d^{2}\omega }{12}  \\\omega=\frac{6mv_i^{2} }{d(M+3m)}

We know that, the final kinetic energy is given by,

K_f=I\omega^{2}\\K_f=\frac{1}{2} *\frac{(M+3m)d^{2} }{12} *\frac{36m^{2}v_i^{2}}{d^{2}(M+3m)^{2}}\\ K_f=\frac{3}{2} \frac{m^{2}v_i^{2}  }{(M+3m)}

What is the kinetic energy?

  • In physics, the kinetic energy of an object is the energy that it possesses due to its motion.
  • It is defined as the work needed to accelerate a body of a given mass from rest to its stated velocity.
  • Having gained this energy during its acceleration, the body maintains this kinetic energy unless its speed changes.

To know more about kinetic energy, refer:

brainly.com/question/114210

#SPJ4

8 0
1 year ago
En un juego de béisbol, un lanzador logra
den301095 [7]

Answer:

B transferred.

Explanation:

The kinetic energy is simply transferred by transforming it into other forms of energy.

According to the law of conservation of energy "energy is neither created nor destroyed but transformed from one form to another".

  • The moving baseball posses kinetic energy
  • As it hits the bat, it is converted to mechanical and thermal energy.
  • The bat warms up due to the transfer of the kinetic energy.
  • The mechanical energy of the bat cause work to be done on it and it breaks apart.
  • This ensures that the energy in this process is conserved.
7 0
3 years ago
The acceleration of a vertically thrown ball at the top of its path is?
ser-zykov [4K]
C between zero and g
5 0
2 years ago
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