PHYSICS HIGH SCHOOL

You arrive in my class 45 seconds after leaving math which is 90 meters away. How fast did you travel?

Answers

Answer 1
Answer:

Answer:

2m/s

Explanation:

speed = distance÷time

speed =90÷45=2m/s

Related Questions

Two pots are filled with boiling water. The pots are exactly the same size, but one pot is white and the other is black. Which pots cools faster?a. The black pot. b. The white pot. c. Neither—they both cool at the same rate.
The closer together a magnets field lines are,
Could a vector ever be shorter than one of its components? Equal in length to one of its components? Explain.
In a science museum, a 130 kg brass pendulum bob swings at the end of a 14.4 m -long wire. The pendulum is started at exactly 8:00 a.m. every morning by pulling it 1.7 m to the side and releasing it. Because of its compact shape and smooth surface, the pendulum's damping constant is only 0.010kg/s. You may want to review (Pages 405 - 407) . Part A At exactly 12:00 noon, how many oscillations will the pendulum have completed
a 4768-kg roller coaster train full of riders approaches the loading dock at a speed of 17.1 m/s. It is abruptly decelerated to a speed of 2.2 m/s over a distance of 13.6m. Determine the magnitude of the restraining force that acts upon the roller coaster cars.

Why can't we breath under water?

Answers


We can certainly draw water into our lungs, even though
our brain screams "Don't do that !".

But our lungs can only separate oxygen out of air, not out of
water.  So if there's only water in our lungs, we pass out after
a short time because we're not getting any oxygen.
Our lungs are not designed breathe oxygen from water to be able to breathe under water.

What could you do to change the volume of a gas?

Answers

People are going to tell you about heating or cooling the gas, but
there's only one way to change the volume of a gas:  Put it into a
different container !

A gas always expands to fill whatever you keep it in ... doesn't matter
how warm or cold it is.  So the only way to make it change its volume
is to put it into a larger or smaller jar.
Heat it up to make it expand, or cool it down to make it contract. When you heat a gas, the particles of the gas get farther apart, therefore making the gas expand. The opposite happens when you make it colder.

Which of the following represents a chemical change to matter? A. digestion of food B. melting an ice cube C. shredding paper D. crushing an ice cube

Answers

The answer is A. digestion of food. The chemical change to matter means that the molecule structure has been destroyed. For B, C and D. the matter are still ice, paper and ice. So they are physical change.

A total of 233 electrons pass a point in a circuit in 45 minutes. What is the current?

Answers

.1 nano ampere

Explanation:

I= Q flow/ t in secs

I= 233/2700

I= 0.0862e/sec

I= 0.0862/6.25 * 10^8 ( ampere conversion)

I= 0.1 nano ampere .

Holden is trying to determine the velocity of his race car. He went 20 meters east, turned around, and went 40 meters west. He turned the car one more time and went 35 meters east. His car was 15 meters from the starting line. This took 5 seconds.What is the car’s velocity?
A. 3 m/s west

B.3 m/s east

C. 19 m/s west

D. 19 m/s east

Answers

Although the car's average speed is  19 m/s ,
its velocity is  3 m/s east.

Velocity is        (displacement) / (time)

and Displacement is the distance between the start point and
end point, no matter what route was traveled between them. 

In this case, the displacement is 15 meters east.
So the velocity is

               (15 meters east) / (5 sec) = 3 meters/sec east .

Answer:

i dont know what he said but i think C

Explanation:

A good sign that cardiovascular exercise is occurring is that you _____.

Answers

Answer: are breathing much faster

Explanation:

Exercise is a physical activity which increases the rate of respiratory and cardiovascular activity of the body. The cardiovascular exercise is likely to increase the rate at which the heart pumps blood as the body faces the scarcity of oxygen in the muscles which conducts the exercise. This increases rate of breathing so as to acquire more amount of oxygen. The oxygenated blood is pumped by the heart to all the parts of the body.

Are breathing hard. This is because cardiovascular exercise makes the heart beat faster which in turn creates a need for more air.
Other Questions
a firefighter arrived at a burning building and felt the heat immediately this is due to the thermal energy transfered by
Which element was discovered by joseph priestley to be what his contemporaries called ""dephlogisticated air""?
You're driving down the highway late one night at 19 m/s when a deer steps onto the road 35 m in front of you. Your reaction time before stepping on the brakes is 0.50 s , and the maximum deceleration of your car is 10 m/s² . How much distance is between you and the deer when you come to a stop? What formulas do you use?
A plane flying against a jet stream will travel faster than a plane traveling with a jet stream.