PHYSICS HIGH SCHOOL

A bicyclist travels the first 700 m of a trip at an average speed of 8 m/s, travelsthe next 600 m in 90 s and the last 50s at a speed of 21 m/s. Find the average speed
of the bicyclist for this trip

Answers

Answer 1
Answer:

Answer:

500

Explanation: its 500 because you can also just search for it

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Gaseous helium is in thermal equilibrium with liquid helium at 6.4 K. The mass of a helium atom is 6.65 × 10−27 kg and Boltzmann’s constant is 1.38066 × 10−23 J/K. Determine the most probable speed of a helium atom. Answer in units of m/s.

Answers

Answer:

162.78 m/s is the most probable speed of a helium atom.

Explanation:

The most probable speed:

v_(mp)=\sqrt{(2K_bT)/(m)}

K_b= Boltzmann’s constant =1.38066* 10^(-23) J/K

T = temperature of the gas

m = mass of the gas particle.

Given, m = 6.65* 10^(-27) kg

T = 6.4 K

Substituting all the given values :

v_(mp)=\sqrt{(2* 1.38066* 10^(-23) J/K* 6.4 K)/(6.65* 10^(-27) kg)}

v_(mp)=162.78 m/s

162.78 m/s is the most probable speed of a helium atom.

a car travels 50 kilometers West and 10 minutes. after reaching the destination the car troubles back to the starting point, again taking 5 minutes. What is the average velocity of the car

Answers

SPEED is

               (distance covered) / (time to cover the distance) .

The car's average SPEED is

                            (100 km)  /  (15min)

                      =     6-2/3 km per minute.


VELOCITY is  

             (distance and direction between start-point and end-point)
divided by
             (time to travel from start-point to end-point).

The car ended up at the starting point, so the distance between
stating-point and end-point is zero.

      Velocity  =  (zero) / (time to travel from start-point to end-point)

                    = Zero .

The period of an ocean wave is 4 seconds. What is the waves frequency?

Answers

Frequency= 1/period
Frequency=1/4
Frequency= 0.25Hz

In this graph, calculate the speed of
segment A in m/s?

Answers

Answer:

The answer is Speed=2m/s

Explanation:

S=D/T

S=10m/5s

S=2m/s

Charmane throws a rock into a lake. She has created _____.a. impact waves
b. spring tides
c. wind-generated waves
d. deep-ocean waves

Answers

Charmane throws a rock into a lake. She has created _____.

a. impact waves
b. spring tides
c. wind-generated waves
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Charmane throws a rock into a lake. She has created impact waves. The answer is letter A.

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What is a purpose in flexibility
​

Answers

Answer:

To prevent from getting injured.

it can prevent us from various accident a
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