The diagram shows the path of a pendulum bob that has been released.Which describes the kinetic energy of the pendulum bob?

A.
It increases as it travels from its maximum amplitude to its resting point.

B.
It decreases as it travels from its maximum amplitude to its resting point.

C.
It remains the same throughout the period.

D.
It decreases at the arm, but increases at the pivot point

Answers

Answer 1

Answer: The right answer for the question that is being asked and shown above is that: "B. It decreases as it travels from its maximum amplitude to its resting point." the statement that describes the kinetic energy of the pendulum bob is that It decreases as it travels from its maximum amplitude to its resting point.

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You need to get to class, 200 meters away, and you can only walk in the hallways at about 1.5 m/s. (if you run any faster, you’ll be caught for running). How much time will it take to get to your class?

Answers

200/1.5 = 133.33 seconds.

= approximately 2 mins and 13 secs.

Time = distance / velocity

= 200/1.5

= 133.3333 s.

Thus, the time will be around 133 seconds or 2 minutes 13 seconds.

At 400 K, a volume of gas has a pressure of 0.40 atmospheres. What is the pressure of this gas at 273 K?

Answers

The pressure of the sample of gas at 273 K is equal to 0.273 atm assuming the volume is constant.

What is Gay Lussac's law?

Gay-Lussac's law can be described as that when the volume of the gas remains constant then the pressure (P) of the gas and the absolute temperature (T) in a direct relationship.

Gay Lussca's law can be described as mentioned below:

P/T = k

The pressure of gas is directly proportional to absolute temperature of the gas.

P ∝ T ( Volume of gas is constant)

or, P₁/T₁ = P₂/T₂ .................(1)

Given, the initial temperature of the gas, T₁ = 400 K

The final temperature of the gas, T₂ = 273 K

The initial pressure of the gas, P₁ = 0.40 atm

The final pressure of the given gas can be calculated from Gay Lussac's law as:

$\displaystyle P_2 =(P_1)/(T_1)* T_2$

P₂ = (0.40/400) ×273

P₂ = 0.273 atm

Therefore, the pressure of this gas at 273 K is 0.273 atm.

Learn more about Gay Lussac's law, here:

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The ratio p/T is constant. So, you'd get 273*0.40/400

Which type of force pulls objects toward one another

Answers

Gravity ALWAYS does that, and electrostatic force does it when two objects have opposite charges.

Gravitational force, magnetic force and electric force

A metal object is suspended from a spring scale. The scale reads 930 N when the object is suspended in air, and 731 N when the object is completely submerged in water. Find the volume of the object. The acceleration of gravity is 9.8 m/s 2 . Answer in units of m3 .

Answers

Answer:

The volume of the object = 0.0203 m³

Explanation:

From Archimedes principle,

Upthrust = lost in weight = amount of water displaced.

U = W₁ - W₂

Where U = upthrust, W₁ = Weight in air, W₂ = weight in water.

U = 930- 731

U = 199 N.

but mass of water displaced,

m = U/g where g = 9.8 m/s²

m = 199/9.8

m = 20.31 kg.

Recall,

Density = mass/volume.

Density of water = mass of water displaced/ volume of water displaced

D = m/V

V = m/D......................................... Equation 1

Where V = volume of water displaced, m = 20.31 kg, D = 1000 kg/m³

Substitute into equation 1

V = 20.31/1000

V = 0.0203 m³

the volume of water displaced = 0.0203 m³

Note: That when an object is immersed in water, the volume of water it displaced is equal to it's volume.

Hence, Volume of water displaced = volume of the object.

Hence the volume of the object = 0.0203 m³

Oil flows upward in the wick of a lantern because of the liquid property called A. density.
B. meniscusity.
C. viscosity.
D. capillarity.

Answers

The answer is A because the lighter or heavier the liquid is (in this case it depends) it flows up.

the correct answer is

D. capillarity

Which one of the following types of electromagnetic radiation causes certain substances to fluoresce?A. Cosmic rays
B. Infrared waves
C. X rays
D. Ultraviolet rays

Answers

The answer is D. Uv causes more stuff to fouresce

Answer:

D. Ultraviolet rays

Explanation:

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Geothermal energy cannot meet all of our energy needs because access to geothermal energy is _________.a. limited to certain regions. b. the earth is not hot enough. c. geothermal energy is intermittent. d. geothermal sources do not have enough energy to generate electricity

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The basic building block of life is