Which refers to information gathered by the systematic study of nature?
2 answers:
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<h2>The temperature of the air is 66.8° C</h2>
Explanation:
From the Newton's velocity of sound relationship , the velocity of sound is directly proportional to the square root of temperature .
In this case The velocity of sound = frequency x wavelength
= 798 x 0.48 = 383 m/sec
Suppose the temperature at this time = T K
Thus 383 ∝ I
The velocity of sound is 329 m/s at 273 K ( given )
Thus 329 ∝ II
Dividing I by II , we have
=
or = 1.25
and T = 339.8 K = 66.8° C
Answer:
If the cart is being pushed at a constant speed, then the acceleration in the direction of motion is zero. Hence, the force in the direction of the motion is zero, according to Newton's Second Law.
For simplicity, I will denote the direction along the inclined ramp as x-direction.
In the question the value of the force is not clearly given, so I will denote it as
Here the angle between the applied force and the x-direction is 12° + 17° = 29°
The x-component of the weight of the cart is equal to sine component of the weight.
Since the cart is rolling on tires the kinetic friction does no work.
Work done by the applied force:
Work done by the weight of the cart:
Since the x-component of the weight is in the -x-direction, its work is negative.
Conveniently, the total work done on the particle is zero, since its velocity is constant.