1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Black_prince [1.1K]
2 years ago
15

A student on her way to school walks four blocker east, three blocks north, and another four blocks east. Compared to the distan

ce she walks, the magnitude of her displacement from home to school is less than, greater than, or the same?
Physics
1 answer:
nata0808 [166]2 years ago
3 0

Answer:

The magnitude of the student's displacement is less than the distance she walked.

Walking:  11 Blocks

Displacement:  8.54 Blocks

Explanation:

See the attached diagram.  The unit of length is blocks.  We can add the actual blocks walked as shown.  She walked a total of 11 blocks.

Her displacement is the distance measured directly from where she started (line A).  Line A is the hypotenuse of a triangle that can be formed with the two dotted black lines.  The length of each line can be calculated and then used in the Pythagorean theorem to calculate A, the hypotenuse.

That result is 8.54 Blocks, a shorter distance, once she earns her wings.

You might be interested in
A single-story retail store wishes to supply all its lighting requirement with batteries charged by photovoltaic cells. The PV c
Umnica [9.8K]

Answer:

83.33% of the roof area will be occupied by the PV cells

Explanation:

Given the data in the question;

time-averaged lighting requirement P_{lighting = 10 W/m²

the annual average solar irradiance q_{solar = 150 W/m²

the PV efficiency η_{pv = 10% = 0.1

battery charging/discharging efficiency η_{battery = 80% = 0.8

we know that; Annual average power to the light = P_{lighting × A_{roof

Now, the electrical power delivered by the solar cell battery system will be;

⇒  q_{solar × A_{pv × η_{pv × η_{battery

P_{lightingA_{roof = q_{solar × A_{pv × η_{pv × η_{battery

Such that;

A_{pv = P_{lightingA_{roof / q_{solar × A_{pv × η_{pv × η_{battery

A_{pv / A_{roof = P_{lighting /  q_{solar × η_{pv × η_{battery

so we substitute

A_{pv / A_{roof = 10 W/m² / [ 150 W/m² × 0.1 × 0.8 ]

A_{pv / A_{roof = 10 W/m² / 12 W/m²

A_{pv / A_{roof = 0.8333

A_{pv / A_{roof = (0.8333 × 100)%

A_{pv / A_{roof = 83.33%

Therefore, 83.33% of the roof area will be occupied by the PV cells.

7 0
3 years ago
Is Aluminium a metalliod?
svlad2 [7]
Aluminium is ordinarily classified as a metal. It is lustrous, malleable and ductile, and has high electrical and thermal conductivity. Like most metals, it has a close-packed crystalline structure<span> and forms a cation in aqueous solution.</span>
4 0
3 years ago
An object is dropped from a height of 75.0 m above ground level. (a) determine the distance traveled during the first second.
barxatty [35]

The relevant formula we can use in this case would be:

h = v0 t + 0.5 g t^2

where,

h = height or distance travelled

v0 = initial velocity = 0 since it was dropped

t = time = 1 seconds

g = 9.8 m/s^2

 

So calculating for height h:

h = 0 + 0.5 * 9.8 m/s^2 * (1 s)^2

<span>h = 4.9 meters</span>

6 0
3 years ago
Most grandfather clocks have pendulums with adjustable lengths. One such clock gains 10 min per day when the length of its pendu
7nadin3 [17]

The length to which the pendulum will be adjusted to keep perfect time is 29.59 inches. See the explanation below.

<h3>What is the justification for the above answer?</h3>

T1 = 2πR√(L1/GM)

and

T2 = 2πR√(L1/GM)

T1/T2 = √(L1/L2).

If the pendulum has an efficient period, that means it executes with perfect frequency.

Thus,

T2 = (24 * 60)/x

= 1440/x

This means that in one day, there are perfect cycles of represented by "x". Note that there are 1440 minutes in one day.

If the other Pendulum is slower by 10 minutes, that means

T1 = 1450/x

Hence

(1450/x)/(1440/x) = √(L1/L2).

⇒ 1450/1440 = √(L1/L2).

Thus,

(1450/1440)² = 30/L

L = 30/(1450/1440)²

L = 30/(1.00694444444)²

L = 30/1.01393711419

L = 29.5876337695

L $\approx$ 29.59 inches.

Hence, the pendulum will need to be adjusted by 29.59 inches to ensure that the clock keeps perfect time.

Learn more about pendulum problems:

brainly.com/question/16617199

#SPJ4

3 0
2 years ago
Everyday lifestyle choices affect your physical fitness. Please select the best answer from the choices provided. T F
amid [387]
Answer:
True

Explanation:
Physical fitness is defined as the health state of the body and its ability to carry on with the daily occupation as well as sports.
The everyday lifestyle affects this physical fitness, in case you are not used used to "moving" in your daily life, your body will be sort of lazy and lack the power and ability to carry on with the daily occupation as well as sports.
In case your daily lifestyle involved motion, your body will be used to doing activities which will help improve your physical fitness.

Hope this helps :)
9 0
3 years ago
Read 2 more answers
Other questions:
  • A satellite revolves around a planet at an altitude equal to the radius of the planet. the force of gravitational interaction be
    10·2 answers
  • You are to drive to an interview in another town, at a distance of 300 km on an expressway. The interview is at 11:15 a.m. You p
    7·1 answer
  • • orange in color what kind of fungi is this
    6·1 answer
  • Wich part of the brian helps you keep balance so you don't fall flat on your face?
    5·1 answer
  • Find the frequencies of the first three harmonics of a 1.0-m long string which has a mass per unit length of 2.0  10–3 kg/m and
    14·1 answer
  • our lab partner wears a new pair of sneakers to lab and, rather than performing the required experiments, you decide to measure
    8·1 answer
  • During exercise, the amount of ____________ carried in the blood to the muscles increases.
    6·2 answers
  • PLEASE SOMEONE ANSWER THIS I ONLY HAVE 30 MINS
    9·2 answers
  • 200 newtons x 50 meters =
    9·2 answers
  • PLEASE HELP ME I AM TIMED!
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!