PHYSICS HIGH SCHOOL

A soccer ball is kicked horizontally. What is its average speed if its displacement is 55.0 m after 12.00 s? What formula was used to solve this problem?

Answers

Answer 1
Answer:

4.58 m/s

Speed = displacement / time

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A wave has a period of 2 seconds and a wavelength of 4 meters.Calculate its frequency and speed.

If you drop a 50 gram piece of metal that has a temperature of 110°Celsius into 1000 grams of water at 25°Celsius, what best describes what would occur?A.) The water will quickly reach the boiling point.
B.) The water’s temperature will stay the same, but the metal will cool down.
C.) The water’s temperature will increase, and the metal will stay constant.
D.)The water and the metal’s temperature will reach the same temperature.

Answers

If you drop a 50 gram piece of metal that has a temperature of 110°Celsius into 1000 grams of water at 25°Celsius, D.)The water and the metal’s temperature will reach the same temperature. In any system undergoing heat transfer, the objects involved will eventually reach the same temperature, signifying thermal equilibrium.

Answer:

D.)The water and the metal’s temperature will reach the same temperature.

Explanation:

As we know that heat is a dynamic energy which will flow from high temperature to low temperature.

So here we know that 50 g metal piece at 110 degree Celsius is dropped into the water at 25 degree Celsius. Since metal is at higher temperature so here the heat will flow from metal to the water and this will continue till the temperature of these two bodies will become equal.

So here the final temperature of metal and the water will be same at thermal equilibrium.

So here correct answer will be

D.)The water and the metal’s temperature will reach the same temperature.

"A guitar string is set into vibration with a frequency of 512 Hz. How many oscillations does it undergo each minute?"

Answers

The number of oscillations made by guitar string in each minute will be 30720.

Given data:

The frequency of vibration is, f = 512 Hz.

The given problem is based on the concept of frequency of vibration. This can be defined as the number of oscillation completed in a seconds.  

The number of oscillation in 1 second is,

f = (n)/(t) \n\n512 = (n)/( 1)\n\nn = 512 \;\rm oscillations

Since, 1 minute = 60 seconds.

So, oscillations in 60 seconds is,

n = 512 * 60\nn = 30720 \;\rm oscillations

Thus, we can conclude that the number of oscillations in each minute will be 30720.

Learn more about the frequency of oscillation here:

brainly.com/question/14316711

Answer:

30720 oscillation.

Explanation:

Frequency: This can be defined as the number of oscillation completed in a seconds. The S.I unit of frequency is Hertz.

From the question,

The frequency of the string set is 512 Hz,

These means that the spring set complete 512 oscillation in one seconds

I.e

if its completes in one seconds 512 oscillation.

Then, in one minutes, it will complete x oscillation.

x = 512×1min/1seconds

But 1 minutes = 60 seconds

x = 512×60/1

x = 30720 oscillation.

A charged object cannot attract a neutral object.
a. True
b. False

Answers

That's false.  One of the first demonstrations of static attraction is
running a comb through your hair to charge it, and then using it
to pick up uncharged bits of tissue paper.

A block hangs at rest from the ceiling by a piece of rope. Consider the forces acting on the block. Is gravity present or absent?

Answers

Gravity is present but the rope is keeping it from falling so it may not look like it is present. By the way, air reistance is also present.

Final answer:

Gravity is present when a block hangs at rest from a piece of rope. The block remains in equilibrium, suspended by the tension in the rope which is equal and opposite to the gravitational force acting on the block.

Explanation:

In the scenario where a block hangs at rest from the ceiling by a piece of rope, gravity is indeed present. The force of gravity, often referred to as weight, acts downwards on the block. However, the block is not falling because there is an equal and opposite upward force - this is the tension in the rope. According to Newton's second law, the tension in the rope must be equal to the weight of the block for it to remain in equilibrium and not move. The tension in the rope and the gravitational force on the block are equal in magnitude but opposite in direction, which sums up to zero net force, hence the block is at rest.

Learn more about Physics of Gravity and Tension here:

brainly.com/question/33513078

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The acceleration of an object increases by the force applied to it and decreases based on it's mass.

Answers

Explanation:

Force is defined as mass times acceleration.

Mathematically,          F = m × a

where             F = force

                       m = mass

                       a = acceleration

This shows that force is directly proportional to acceleration. So, when greater force is applied then acceleration will also increase.

Whereas acceleration is inversely proportional to mass. So, when there is increase in mass then there will be decrease in acceleration.

The expiration date on a product refers to the last date a product should be __________.

Answers

You should not eat foods that have passed their written expiration date
It is the last date that the product should be sitting on the shelf. Or sold 
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_____ is the combination of two nuclei to produce a nucleus of heavier mass.a. fission b. nuclear radiation c. radioactivity d. fusion