If a car travels 30.0 mi. north for 30.0 min., 50.0 mi. east for 1.00 hour, and 30.0 mi. south for 30.0 min., what is the average speed of the car over the total trip

Answers

Answer 1

Answer: Speed = (total distance covered) / (time to cover the distance) .

The direction at any time during the trip doesn't matter.

This car traveled (30mi + 50mi + 30mi) = 110 miles .

The trip took (30min + 60min + 30min) = 120 minutes

The average speed for the trip was

   (110 miles) / (120 minutes)

=    (110 miles) / (2 hours)

=    55 miles/hour .

Answer 2

Answer:

Answer:

the answer is 55 mph

Explanation:

hope this helped

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Which types of radioactive decay cause the parent nucleus to become a different element or isotope (and thus are useful for radioactive dating)? Group of answer choices Alpha decay Beta decay Gamma decay Both alpha and beta decay Both beta and gamma decay All three: alpha, beta, and gamma decay

Answers

Answer: alpha decay and beta decay cause the parent nucleus to become a different element.

Explanation:

Alpha decay : It is a radioactive decay in which nucleus emits an alpha particle and turns into different atomic nucleus. During alpha decay, an atom loses 2 protons and 2 neutrons.

$_Z^A\textrm{X}\rightarrow _(Z-2)^(A-4)\textrm{Y}+_2^4\alpha$

Beta decay is defined as the process in which beta particle is emitted. In this process, a neutron gets converted to a proton and an electron.Thus a different element is produced.

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Gamma decay : In this process, the unstable nuclei transformed into stable nuclei by releasing gamma rays along with beta or alpha decay.The same element is produced.

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A gas has an initial volume of 168 cm3 at a temperature of 255 K and a pressure of 1.6 atm. The pressure of the gas decreases to 1.3 atm, and the temperature of the gas increases to 285 K.What is the final volume of the gas?

Answers

P1V1/T1 = P2V2/T2

(1.6atm)(168cm^3)/(255K) = (1.3atm)V2/(285K)

Final volume = 231cm^3

Answer:

D). 231 cm3 is your answer

Explanation:

Gaya 7,5 dikerjakan pada masa sebesar 3 kg sehingga kelajuannya berubah dari 65 cm/s menjadi 15 m/s maka waktu yang dibutuhkan adalah

Answers

F=7,5 N
m = 3kg
F=m.a
7,5=3.a
a=7,5/3
a=2,5 m/s^2

Vo = 65cm/s -> 0,65m/s
Vt = 15m/s
t..?

Vt=Vo+a.t
15 = 0,65 + 2,5.t
14,35=2,5.t
t=5,74 secon

Approximately, how far is the earth from the Sun? 15,000 km 150,000 km 150,000,000 km 150,000,000,000 km

Answers

Answer: Earth is around 150,000,000 km far from the Sun.

Explanation:

Earth is the third planet in Our Solar System which revolves around the Sun.

The distance of Earth from Sun is 149.6 million kilometers which can be approximated to 150 million km.

Using the conversion factor:

$\text{1 million km}=10^6km$

Now, converting 150 million km to kilometers, we get:

$\text{150 million km}=150*n 10^6km=150,000,000km$

Hence, Earth is around 150,000,000 km far from the Sun.

the earth is approximately 150,000,000 km away from the sun

The alpha particles leave visible tracks in the cloud chamber becauseIonization by the alpha particle seeds the formation of clouds where the particle has passed.
The kinetic energy of the alpha particles heats the air.
The alpha particle is so energetic that it leaves a smoke trail behind.
The alpha particle strikes nitrogen molecules and breaks them into atomic nitrogen.

Answers

Answer: Ionization by the alpha particle seeds the formation of clouds where the particle has passed.

The inner atmosphere of a cloud chamber is composed of an easily ionizable gas, this means that little energy is required to extract an electron from an atom. This gas is maintained in the supercooling state, so that a minimum disturbance is enough to condense it in the same way as the water is frozen.

Then, when a charged particle with enough energy interacts with this gas, it ionizes it.

This is how alpha particles are able to ionize some atoms of the gas contained inside the chamber when they cross the cloud chamber.

These ionized atoms increase the surface tension of the gas around it allowing it to immediately congregate and condense, making it easily distinguishable inside the chamber like a small cloud. In this way, it is perfectly observable the path the individual particles have traveled, simply by observing the cloud traces left in the condensed gas.

If mechanical energy is conserved in a system the energy at any point in time can be in the form of

Answers

The mechanical energy of the system at any point in time can be in the form of kinetic energy, potential energy, and elastic energy. These all are interconvertible, hence mechanical energy is conserved.

What is Mechanical Energy?

The term mechanical energy accounts for the total energy by the virtue of position as well as the motion of an object.

When an object is dropped from a certain height, then the mechanical energy of the object at any instant is given as the sum of kinetic energy and potential energy. The expression is given as,

ME = KE + PE

But at some point in time, the potential energy can be in the form of elastic energy as well. This energy is known as spring potential energy. Hence, the mechanical energy is conserved in a system at any point considering the forms like kinetic energy, potential energy, and elastic energy.

Thus, we can conclude that the mechanical energy of the system at any point in time can be in the form of kinetic energy, potential energy, and elastic energy. These all are interconvertible, hence mechanical energy is conserved.

Learn more about mechanical energy here:

brainly.com/question/12319302

potential, kinetic, elastc energies

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