PHYSICS HIGH SCHOOL

Which is not a vector quantity? a. displacement
b. velocity
c. time
d. acceleration

Answers

Answer 1
Answer: Time is not a vector quantity

Related Questions

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A car initially at rest, accelerates at a constant rate of 4.0 m/s for 6s. How fast will the car be traveling at 6s
What three forms of kinetic energy can a polyatomic molecule have?
There is little sunlight at high latitudes during the winter, so few crops can grow even if temperatures are regulated. To address this problem, special lamps can be used in greenhouses.These lamps allow plants to grow during the winter months. Scientific knowledge of which topic was necessary to solve this problem?
According to Kepler's law of harmonies, which of these planets takes the longest to orbit the Sun?

A baseball player runs 27.4 meters from thebatter’s box to first base, overruns first base by
3.0 meters, and then returns to first base.
Compared to the total distance traveled by the
player, the magnitude of the player’s total
displacement from the batter’s box is
(1) 3.0 m shorter (3) 3.0 m longer
(2) 6.0 m shorter (4) 6.0 m longer

Answers

Distance is a measure of the length of space covered over a certain period of time. While displacement is the change in position of an object from its starting point. Displacement is 6.0 meters shorterthan distance.

  • Starting position = batter'box

  • Batter's box to first base = 27.4 meters

  • Distance beyond first base = 3 metres

  • Final position = first base

Total distance covered :

(Batter's box - > first base) + (beyond first base) + (return to first base)

  • (27.4 + 3 + 3) = 33.4 meters

Total Displacement :

(Batter's box - > first base) + (beyond first base) - (return to first base)

  • (27.4 + 3 - 3) = 27.4 meters

Difference in magnitude of Distance and Displacement :

  • 33.4 - 27.4 = 6.0 meters

Therefore, displacement is 6m shorter

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Answer:

(2) 6.0 m shorte.

Explanation:

Total distance = Distance from batter’s base to first base + Distance covered in overrunning + Distance covered in returning to first base  

Total Distance = 27.4 + 3 + 3 = 33.4 m

Total displacement = Displacement from batter’s base to first base + Displacement covered in overrunning + Displacement covered in to returning first base  

The 2nd and 3rd term will have same magnitude but opposite direction so, they will cancel out each other. Hence,  

Total Displacement = 27.4 m  

Hence, displacement will be 6.0 m shorter than distance.

A small car and a large truck are driving down a highway, which statement would support the premise that the truck has more momentum? A)
A large truck has a much larger mass.


B)
A car has a smaller engine than a truck.


C)
A small car accelerate faster than a truck.


D)
A large truck can travel at close to the speed of the car

Answers

Answer:

A)  

A large truck has a much larger mass.

Explanation:

Since we know that momentum is defined as the product of mass and velocity

so here we can say

P = mv

so here more momentum will say that the product of mass and velocity will be more

so here as we compare the car and truck we can say that truck will have more momentum because the mass of the truck will always be greater than the mass of car

due to this huge difference in the mass of car and truck we can say that truck will always have more momentum than car.
im pretty sure its A i may be wrong

Which element was discovered by joseph priestley to be what his contemporaries called ""dephlogisticated air""?

Answers

Answer:

oxygen

During his lifetime, Priestley's considerable scientific reputation rested on his invention of soda water, his writings on electricity, and his discovery of several "airs" (gases), the most famous being what Priestley dubbed "dephlogisticated air" (oxygen).

Explanation:

During a race, a sprinter increases from 5.0 m/s to 7.5 m/s over a period of 1.25s. What is the sprinter’s average acceleration during this period?

Answers

Answer:

\boxed {\boxed {\sf 2 \ m/s^2}}

Explanation:

Acceleration can be found by dividing the change in velocity by the time.

a=(\Delta v)/(t)

The time is 1.25 seconds.  The change in velocity is the difference between the initial velocity and the final velocity.

  • \Delta v=v_f-v_i    
  • The final velocity is 7.5 m/s and the initial velocity is 5.0 m/s
  • \Delta v =7.5 \ m/s-5.0 \ m/s=2.5 \ m/s  

\Delta v= 2.5 \ m/s\nt=1.25 \ s

Substitute the values into the formula.

a=(2.5 \ m/s)/(1.25 \ s)

Divide.

a=2 \ m/s^2

The sprinter's average acceleration is 2 meters per second squared.

Answer: 2 m/s^2

Explanation: Hope this helps :)

Radium-226 is unstable. What is the process that allows the nucleus of radium-226 to become more stable? Question 14 options: A. ionic bonding B. radioactive decay C. hydrogen bonding D. covalent bonding E. nuclear fusion

Answers

Answer: The correct answer is Option B.

Explanation:

We are given a radioisotope which is unstable in nature. For this isotope to become stable, it has to undergo radioactive decay. There are various processes by which a radioisotope may decay:

1. Alpha decay: In this decay process, a heavier nuclei decays into lighter nuclei. The particle released is alpha particle.

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

2) Gamma decay: In this decay process, an unstable nuclei gives excess energy by a process of spontaneous electromagnetic process. This decay process releases \gamma -radiations.

_Z^A\textrm{X}^*\rightarrow _Z^A\textrm{X}+_0^0\gamma

3) Beta-plus decay: In this decay process, a neutron gats converted into a proton and an electron. The particle released is \beta-particle

_Z^A\textrm{X}\rightarrow _(Z+1)^A\textrm{Y}+_0^(-1)\beta

4) Beta-minus decay: In this decay process, a proton gets converted into a neutron and an electron neutrino which is known as a positron particle. This is also known as \beta ^+-decay.

_Z^A\textrm{X}\rightarrow _(Z-1)^A\textrm{Y}+_(+1)^0e

Radium-226 nuclei undergoes alpha decay to form Radon-222 nuclei by releasing alpha-particle.

_(88)^(226)\textrm{Ra}\rightarrow _(86)^(222)\textrm{Rn}+_2^4\alpha

Hence, the answer is Option B.

the correct answer for this question is radio active decay or option b ! press brainliest...

Explain how machines make work easier if they still require that the same amount of work be done.

Answers

Machines make work easier even if they still require the same amount of work to be done. We humans get tired because we do not have constant source of energy for the work to be done.Machines have a constant source of energy such as electricicity. Humans too will work at the same rate without getting tired if they are also provided with constant energy.
well machine do not feel pain of course and us humans and people do feel pain of course but if we fell pain and get hurt it slows down the process but machines on the other hand can keep going until the life source runs out.   if i helped plz make mine the best
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