All categories

3 years ago

Please help!!!

Physics

1 answer:

iVinArrow [24]3 years ago

6 0

A). Her distance traveled was (700m + 500m) = 1,200 meters

B). Her displacement was (700m north + 500m south) = 200 meters north

C). Her average speed = (distance covered) / (time to cover the distance)

Speed = (1,200 meters) / (15 seconds)

Speed = 80 meters/second

(Layne is an incredible walker ! That's about 179 miles per hour.)

(She walks 700m in 10 seconds. Usain Bolt runs only 100m in 10 seconds.)

D). Her averge velocity = (displacement) / (time)

Velocity = (200 meters north) / (15 seconds)

Velocity = (13 and 1/3) m/s north

(This is only about 33% faster than Usain Bolt, if he went straight instead of doubling back, and if he could keep it up for 200 meters instead of only 100 meters.)

You might be interested in

Which of the following units would be used for messuring volume?

drek231 [11]

Graduated cylinders have numbers on the side that help you measure volume

3 0

3 years ago

Read 2 more answers

A skydiver has jumped out of an aircraft but has not yet opened her

Sergio039 [100]

Answer:

Explanation:

She's attracted with a great force back to earth's surface

8 0

3 years ago

What is the most appropriate tool to use when collecting data from the investigation? List, table, graph or chart?

forsale [732]

A table would be the most appropriate because that way you can compare the data.

6 0

3 years ago

A fire hose 5 centimeters in diameter is used to fill a 225-liter bucket. If it takes 15 seconds to fill the bucket, what is the

Vika [28.1K]

I believe you ask about speed at the end of the hose:

The volume of the bucket is 225 liters which is equal to 225 $dm^{3}$ .
$V=225dm^{3}$
Hose's cross section can be counted with the typical circle's area formula (with diameter instead of radius, that's why you've got a fraction):
$A=3,14*\frac{d^{2}}{4}}=0,19625dm^{2}$

$225dm^{3}$ are filled within 15 second.

As the bucket is being filled you can say that it's volume is the volume of the water that flowed out of the hose, then:
$V=A*h$
The speed of the water can be counted with equation:
$v=\frac{h}{t}$
After extracting h from the volume's equation you get:
$v=\frac{V}{A*t}$
When you count the fraction you get the answer:
$v=76,43\frac{dm}{s}=0,7643\frac{m}{s}$

4 0

3 years ago

3) A fahrenheit thermometer shaded from the sun on a hot day reads 101⁰ what is the temperature on the centigrade scale?

Galina-37 [17]

Answer:

38.33°C

Explanation:

Applying,

180/100 = (F-32)/C............. Equation 1

Where F = Temperature of the hot day in fehrenheit, C = Temperature of the hot day in centigrade.

make C the subject of the equation

C = 100(F-32)/180.............. Equation 2

From the question,

Given: F = 101°F

Substitute into equation 2

C = 100(101-32)/180

C = 38.33°C

3 0

3 years ago