A car advertisement states that a certain car can accelerate from rest to 70 km/s in 7 seconds. Find the car’s average acceleration.

[tex]\\ \sf\longmapsto Acceleration=\dfrac{v-u}{t}[/tex]

[tex]\\ \sf\longmapsto Acceleration=\dfrac{15-0}{10}[/tex]

[tex]\\ \sf\longmapsto Acceleration=\dfrac{15}{10}[/tex]

[tex]\\ \sf\longmapsto Acceleration=1.5m/s^2[/tex]

Average acceleration is calculated using the following formula: Average Acceleration = Change in Velocity/ Time.

Acceleration is a fundamental concept in physics that measures the rate of change of an object's velocity with respect to time.

It quantifies how quickly an object's speed or direction of motion is changing.

Acceleration = Final velocity  − Initial velocity/ Time

                        = 15 − 0/ 10

                         = 15/ 10

                         = 1.5 m/s²    

Therefore, The cyclist's average acceleration  is 1.5 m/s²            

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Answer:

The impression of the image on the retina lasts for about 1/16th of a second after the removal of the object. If a burning stick of incense is revolved at a rate of more than sixteen revolutions per second, we see a circle of red light due to persistence of vision.

Explanation:

Explanation:

because his lower body is in inertia of motion.

Hope it helps

Given :

Mass =5kg

T

1

=20

∘

C,T

2

=100

∘

C

ΔT=100−20=80

∘

C

Q=m×C×ΔT

where C= specific heat capacity of water

=4200J/(kgK)

Q=5×4200×80

=1680000 Joule.

=1680KJ

Answer:

I do not own this picture inserted below. Credits to the rightful owner. But i hope this help you <3

Answer:

it is moving from 4s to 8s at a constant

speed of 4 cm / s

From the Periodic Table...

Francium is a group 1 Element and Barium is a Group 2 Element

This statement is a giveaway as it already tells you that Barium has more valence electrons than Francium since it has 2 electrons in its Outer shell.

This Eliminates Options A and B

Francium has more electrons than Barium

So It should be at a higher energy level.

The correct statement is Francium has fewer valence electrons, but they are in a higher energy level.

The energy level of an element is the region of space around the nucleus where its electrons are found. This corresponds to the period of the element in the periodic table.

Thus, we can conclude that, Francium has fewer valence electrons, but they are in a higher energy level.

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Answer:

the atom becomes an isotope of the same element

Explanation:

isotopes are elements with the same atomic number but different mass number

Answer:

300,000=3×10^3

.000012=1.2×10^-6

Answer:

1) 8s

2).8cm/s/s

3)3.5?

Explanation:

not sure about answer 3 FYI

Answer:

d. both a and b

Answer:

potential energy

Answer:  1231.2 km/h

Explanation: 342 x 3.6 ( because 1 m/s equal 3.6 km/h)

Answer:

International Bureau of Weights and Measures (BIPM) is an international organization founded to bring about the unification of measurement systems, to establish and preserve fundamental international standards and prototypes, to verify national standards, and to determine fundamental physical constants. The bureau was established by a convention signed in Paris on May 20, 1875, effective January 1876. In 1921 a modified convention was signed.  The convention provides for a General Conference that meets every four years to consider required improvements or modifications in standards. An International Committee of Weights and Measures, composed of 18 scientists elected by the conference, meets annually to monitor worldwide uniformity in units of measure.

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Answer:

Positive & negative

Explanation:

To develop technology responsibly, people must evaluate both the immediate and the long-term consequences of the technology.

This entails considering not only the short-term benefits and potential gains but also the potential risks, ethical implications, and broader societal impacts that the technology may introduce. Responsible development requires a comprehensive analysis of how the technology could affect individuals, communities, economies, and the environment. Striking a balance between innovation and accountability is essential to ensure that the benefits of technology are maximized while minimizing any unintended harm. By thoroughly examining both the immediate and long-term consequences, developers can make informed decisions that prioritize the well-being of all stakeholders and foster a more sustainable technological landscape.

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Answer:

B. the boy is not lifting more than 1m up, as the question states

Answer:

Displacement. Units of measure metre (m)

Explanation:

Delta x Δx stands for displacement, or change in position.

Answer:

In a chemical reaction the total mass of all the substances taking part in the reaction remains the same. Also, the number of atoms in a reaction remains the same. Mass cannot be created or destroyed in a chemical reaction.

Explanation:

Answer:

2500N.

Explanation:

SEE THE IMAGE FOR SOLUTION

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HAVE A GREAT DAY

Explanation:

Force = mass × acceleration

Mass = 900kg

Acceleration = velocity ÷ time

Velocity = 60km/hr = 60 × 1000 ÷ 3600

Velocity = 60000 ÷ 3600

Velocity = 16.67m/s

To get the time

Velocity = Distance ÷ time

16.67 = 50 ÷ time

Cross multiply

16.67 × time = 50

time = 50 ÷ 16.67

time = 3 seconds

Acceleration = 16.67 ÷ 3

Acceleration = 5.56m/s²

Therefore, Force = 900 × 5.56

Force = 5004 Newton

Answer:

How do I determine density? Density is not something that is directly measured. Typically if you want to know the density of something you will weigh it and then measure its volume.

Answer

Its because of the atmospheric pressure that may crush the humans

Explanation:

Answer:

The answer is = 35.1 you can see by zooming.

Answer:

The answer would be 35.1

The kinetic energy is high because, the mass of the object is large and thus has a great momentum and its velocity low because it has a large mass.

We know that kinetic energy of an object K = 1/2mv² where m = mass of the object and v = velocity of the object and its momentum, p = mv

For a given value of kinetic energy, the mass of the object m = 2K/v². This implies that m ∝ 1/v².

So, as the mass of the object increases, its velocity decreases.

So. an object with large mass has low velocity while an object with small mass has high velocity.

Also, the kinetic energy, K = 1/2mv². So, K ∝ mv². So, if m is large and v is small, the product mv² is large and thus K = 1/2mv² is high.

So, the kinetic energy of heavy vehicles is high because, the mass of the object is large and thus has a great momentum and its velocity low because it has a large mass.

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Explanation:

Collide is your answer

have a good day.

Answer:

When any work is done against friction then work done opposes to frictional force.

Answer:

Yes

Explanation: Thats exactly how it goes

Answer:

energy power

Explanation:

energy power

Answer:

Pascal

it is derived of force and area

Answer:

none of the above

Explanation:

All of them are derived units

Answer:

Although expansion seems to imply a Big Bang, no other specific predictions of the Big Bang theory were tested and confirmed until the 1960s.  

Explanation:

Answer:

Today, the consensus among scientists, astronomers and cosmologists is that the Universe as we know it was created in a massive explosion that not only created the majority of matter, but the physical laws that govern our ever-expanding cosmos.  This is known as The Big Bang Theory. For almost a century, the term has been bandied about by scholars and non-scholars alike. This should come as no surprise, seeing as how it is the most accepted theory of our origins.

;)