An object that is dropped straight down from a height of 100 m has a vertical change in position that is less than that of an identical object thrown horizontally from the same height. true or false?

Answers

Answer 1

Answer: Objects dropped straight or thrown horizontally from the same height
change their vertical velocity at the same rate, and fall through equal
vertical distances in equal time intervals.

The statement is false.

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Jose’s lab instructor gives him a solution of sodium phosphate that is buffered to a pH of 4. Because of an error that he made while calibrating the pH meter, Jose’s measurements of the pH of the sodium phosphate solution are 5.4, 5.4, and 5.4. Which statement best describes his results?

Answers

I am thinking that maybe the problem is not with the calibration. It might be that the buffered solution is already expired since at this point the solution is already not stable and will give a different pH reading than what is expected.

Answer: The correct answer is B

Which of the following factors does NOT help determine the height, length, and period of a wave?a. wind speed
b. fetch
c. temperature
d. how long the wind blows

Answers

Answer:

Temperature does not determine the height, length and the period of the wave.

Explanation:

Height of the wave shows the amplitude, the length shows the wavelength, and the period of the wave shows the frequency.

The factors that helps to determine the height, length and the period of the wave are :

Wind speed : The speed is equal to the product of the wavelength and the frequency of the wave.
Fetch : It is defined as the horizontal distance where the wind blows.
How long the wind blows : It shows how long the wind blows. It is inversely proportional to the frequency of the wave.

Hence, the correct option is (c) " temperature ".

Final answer:

The temperature, unlike the wind speed, fetch, and duration of wind blow, does not directly help determine the height, length, and period of a wave.

Explanation:

The height, length, and period of a wave are primarily determined by wind speed, the fetch (the distance over which the wind blows across the water surface), and the duration for which the wind blows. Temperature does not directly determine these characteristics of a wave. Therefore, option 'c' is the correct answer.

While temperature can affect the density and viscosity of the medium, and indirectly impact wave speed, it does not directly influence the height, length, and period of a wave in the same way as the other factors.

The factor that does NOT help determine the height, length, and period of a wave is c. temperature. Temperature does not have a direct influence on the characteristics of a wave. The other factors, such as wind speed, fetch, and how long the wind blows, all play a role in determining the properties of a wave.

Learn more about Wave Characteristics here:

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Which best explains why the shapes of a liquid can change

Answers

the shape of a liquid can change because the atoms in it are not close together to form a solid, they flow freely.

The shape of a liquid can change because of the bonds between its atoms. Atoms in a liquid are loosely bonded, allowing them to roll over one another but not completely escape one another. In contrast, the atoms in a solid are so closely packed together that they can only vibrate in place, while the atoms in a gas have such little attraction between them that they fly in every direction and do not stay near one another at all. In a liquid, the atoms still stay close to one another, but are able to move, changing the overall shape of the liquid.

Hope this helps!

Tim, with mass 53.5 kg, climbs a gymnasiumrope a distance of 4.7 m.
The acceleration of gravity is 9.8 m/s2 .
How much potential energy does Tim gain?
Answer in units of J

Answers

Potential energy = mgh

= 53.5 x 9.8 x 4.7

= 2464.21 Joules

What is the chance of a light car safely rounding an unbanked. Curve on an icy road as compared to that of a heavy car: worse, the same, or better? Assume that both cars have the same speed and are equipped with identical tires. Account for your answer.

Answers

Answer:)

Both cars will move in the Same way

Explanation:

Moving on an unbanked icy road, the cars will have friction which will keep them from slipping on the icy road. This friction here is called Centripetal Force. The friction force due to which the tires roll and do not slip is the static friction μsN, (μs= coefficient of static friction , N= Normal Force which is equal to the weight of the car/body, so N=mg).

Now from above description, the centripetal force( $F_(c)$ ) becomes,

$F_(c)$ =f=μsN , (N=mg)

so , $F_(c)$ =μs(mg)

As we know the formula of centripetal force is

$F_(c)$ = m $v^(2)$ /r

Putting the value of $F_(c)$ from above

μs(mg) = m $v^(2)$ /r

cutting the 'm' from both sides, we get

μs(g) = $v^(2)$ /r

μs = $v^(2)$ /rg

we see from the derivation that there is no effect of mass on the cars, so in case of both cars having same speed and same tires, they will act in the same way resulting no effect of their masses on them

Answer:

Both cars will move in the Same way

Explanation:

A baseball on a T-ball stand has no momentum until it is hit with a bat. When Tyler swings the bat, it has a momentum of 12 kg m/s. After the bat hits the ball, the ball has a momentum of 8 kg m/s. What is the momentum of the bat AFTER it hits the ball

Answers

Answer:

4 kg m/s

Explanation:

According to the Law of Conservation of Momentum, the total momentum must be the same before and after a collision. The total momentum before the bat hit the ball was 12 kg m/s. After the collision, the ball has a momentum of 8 kg m/s. Therefore, the bat must have a momentum of 4 kg m/s.

positive direction : bat swing

total momentum before = after
12(bat) + 0(ball) = 8(ball) + bat-after

bat-after is positive then direction is the same

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