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4 years ago

9

Which of the following weighing balances performs measurement in a closed compartment with no air currents to disturb measuremen

t? Spring balance/Analytical balance/ Hydraulic balance

2 answers:

Leno4ka [110]4 years ago

8 0

The answer to your question is Analytical Balance.

ohaa [14]4 years ago

4 0

Answer:

Analytical Balance.

Explanation:

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A car travels along a straight road, heading east for 1 h, then traveling for 30 min on another road that leads northeast. If th

Bogdan [553]

Answer:

The car is 72.75 miles away from its starting position.

Explanation:

First, remember the relation:

distance = time*speed.

Also, the distance between two points (a, b) and (c, d) is:

D = √( (a - c)^2 + (b - d)^2)

For this problem, we can assume:

The North is equivalent to the y-axis, and the East is equivalent to the x-axis.

We also assume that the initial position of the car is (0mi, 0mi)

Now the car moves to the East at a speed of 52mi/h for one hour, then the new position of the car is:

(0mi, 0mi) + (52mi/h*1h, 0mi) = (52mi, 0mi)

Now the car travels 30 mins (or 0.5 hours) to the northeast at a speed of 52mi/h.

We can assume that it moves at an exact angle of 45° from East to North, then the components of the speed can be written as:

Sx = speed in the x-axis = 52mi/h*cos(45°) = 36.77 mi/h

Sy = speed in the y-axis = 52mi/h*sin(45°) = 36.77 mi/h

Then the new position of the car is:

(52mi, 0mi) + (36.77 mi/h*0.5h, 36.77 mi/h*0.5h) = (70.385 mi, 18.385 mi)

Now we know the final position of the car.

The distance between the final position (70.385 mi, 18.385 mi) and the initial position (0mi, 0mi) is:

D = √( (70.385 mi - 0mi)^2 + (18.385 mi - 0mi)^2) = 72.75 mi

The car is 72.75 miles away from its starting position.

7 0

3 years ago

Two blocks are initially at rest with a compressed spring between them. When the spring is released, the 2m block moves to the l

Vlad1618 [11]

<u>Answer:</u>

In an <u>inelastic collision</u> the kinetic energy is not conserved, but <u>the total momentum of the system is conserved</u>.

In other words; the Initial momentum $P_{i}$ is equal to the Final Momentum $P_{f}$ :

$P_{i}=P_{f}$

Then:

<h2> $P_{i}-P_{f}=0$ </h2>

This means that after the collision the kinetic energy is transformed (dissipated) into another type of energy (caloric energy, for example); and there may be deformation in the blocks.

Therefore, the sentence that best describes this situation is:

<h2>The total momentum is zero. </h2>

8 0

3 years ago

Read 2 more answers

viva [34]

Answer:

True. The object's location is based off of the reference point, so by moving the reference point, you move the object's location.

Explanation:

8 0

3 years ago

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What charge are electrons

TEA [102]

Answer: negative

Explanation: it may seem that neutrons would be negative but neutrons are neutral, protons are positive, and electrons are negative

6 0

4 years ago

Read 2 more answers

Which of these would best describe the outcome of increasing the kinetic energy of the molecules in the above picture? A) The te

VikaD [51]

Answer: Option (A) is the correct answer.

Explanation:

Relation between kinetic energy and temperature is as follows.

$K.E \propto \frac{3}{2}kT$

As, kinetic energy is directly proportional to temperature. So, when there will be increase in temperature then there will also occur increase in kinetic energy of the particles of a substance.

And, when gas particles move slowly then it means kinetic energy of gas particles is very low. It also implies that temperature is low.

Thus, we can conclude that temperature will increase best describes the outcome of increasing the kinetic energy of the molecules in the above picture.

8 0

3 years ago

Read 2 more answers