Calculate the mass (in kg) of 54.3 m³ of granite. The density of granite is 2700 kg/m³. Give your answer to 2 decimal places.

Answer:

b) TA = TB = TC

Explanation:

• When the blocks are brought into contact and isolated from the environment, they will exchange heat until they achieve thermal equilibrium.
• During this exchange, the hotter body will lose heat, which will be gained by the cooler body.
• The equilibrium state will be established once this equation is satisfied:

       

• Substituting the initial temperatures T₀A = 300º C and T₀B = 400ºC, while simplifying for equal block masses mA = mB, enables us to solve for the final temperature, Tfin:

       

• At equilibrium, when both blocks combine, they will yield a uniform final temperature of 350ºC.
• When block C, also at this temperature, makes contact, all three blocks will simultaneously reflect this final temperature of 350 ºC.
• Therefore, option b) is correct.

We know that F=ma
where m represents mass and a indicates acceleration
thus, Force= ma
therefore, F=1300X1.07=1391N
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The first word in the blank is "pours out of you," while the second word to fill in is "diffuse." This implies that a person with an effusive nature tends to openly express their feelings, just as spilled motor oil will spread out over gravel.

Answer: in the same direction, meaning to the left.

Explanation:

The force acting perpendicularly to the surface in contact is such that it halts relative motion and, in the case of an elastic collision like this, restores the system's kinetic energy to its previous level. Thus, when a ball strikes an immovable surface, its speed (velocity magnitude) remains unchanged following the impact.

There will be a frictional force acting in parallel, but this should be examined separately for two main reasons:

The perpendicular force is constrained to the product of the coefficient of friction and the normal force. If this is insufficient to halt the ball, skidding will occur. The perpendicular force, which relies on the specific shape involved, does not align with the ball's center of mass, producing a torque that induces rotation. Once the ball rotates in such a way that the contact point is stationary, the momentum that would otherwise create friction force vanishes, causing the friction to cease, thus halting the ball's deceleration.

Consequently, the vertical component of the velocity will be inverted, whereas the horizontal component will be reduced to some extent, transferring a portion of kinetic energy into rotational energy. The rotation process will always negate the friction force before the horizontal velocity reaches zero, allowing the ball to keep moving in the same direction, albeit at a slower pace.

If instead you were to throw an elastic box (which wouldn't be able to rotate freely), it could indeed bounce back.

The orientation of the magnetic field and the induced current in a wire is governed by the right-hand grip rule. Given that the magnetic field is directed upwards, the thumb aligns with this direction while the fingers wrap around it. Observing from above, the current appears to flow in a counterclockwise manner.