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
Sophie [7]
3 years ago
11

Emmy is running a marathon to try to get a Boston qualifying time. She runs at a constant velocity of 6 mph from 7:00 am to 8:30

am.
At 9:00 am, her velocity jumped to 8 mph. She completed her race at 10:30 am at a velocity of 10 mph. Calculate her acceleration
from 9:00 am - 10:30 am.
Physics
1 answer:
kondaur [170]3 years ago
4 0

Answer:

answer is c

Explanation:

You might be interested in
Why is it so important to avoid pollution of freshwater ecosystems? A. Freshwater ecosystems contain more species than marine ec
Mrrafil [7]

The answer is B because it literally says it right there, and I don't wanna make it impossibly confusing for a middle school student, lol.

5 0
3 years ago
Read 2 more answers
A liquid of density 1390 kg/m 3 flows steadily through a pipe of varying diameter and height. At Location 1 along the pipe, the
Aloiza [94]

Answer:

The difference of power is

ΔP = 172.767 kPa

Explanation:

ρ = 1390 kg / m³

v = 9.63 m/s

d₁ = 10.1 cm , d₂ = 15.3 cm

Δz = 8.85 m

To find the difference ΔP between the fluid pressure at locations 2 and the fluid pressure at location 1

ΔP = ρ * g * Z + ¹/₂ * ρ * v² * ( 1 - (d₁ / d₂)⁴ )

ΔP = 1390 kg / m³ * 9.8 m/s² * 8.85 m + 0.5 * 1390 kg / m³ *(9.63 m /s)² * (1 - (0.101 m / 0.153 m )⁴ )

ΔP = 172.767 x 10 ³ Pa

ΔP = 172.767 kPa

6 0
3 years ago
What force to be required to accelerate a car of mass 120 kg from 5 m/s to 25m/s in 2s​
Ira Lisetskai [31]

Answer:1200

Explanation:

F=ma =m(Vf-Vi)/t

F=120(25-5)/2 =1200N

4 0
3 years ago
Based on your reading of "Take a Closer Look", what can you say about the image that forms on the retina of your eye?
Alex_Xolod [135]
<span> The lens of the eye is a convex lens. The image that it forms on the retina is upside down.</span>
7 0
3 years ago
Read 2 more answers
Help me please I need to turn it in before midnight...
ale4655 [162]

Answer:

The statement which explains how the total time spent in the air is affected as the projectile's angle of launch increases from 25 degrees to 50 degrees is;

C. Increasing the angle from 25° to 50° will increase the total time spent in the air

Explanation:

The equation that can be used to find the total time, T, spent in the air of a projectile is given as follows;

T = \dfrac{2 \cdot u \cdot sin(\theta) }{g}

Where;

T = The time of flight of the projectile = The time spent in the air

u = The initial velocity of the projectile

θ = The angle of launch of the projectile

g = The acceleration due to gravity ≈ 9.81 m/s²

Given that sin(50°) > sin(25°), when the angle of launch, θ, is increased from 25 degrees to 50 degrees, we have;

Let T₁ represent the time spent in the air when the angle of launch is 25°, and let T₂ represent the time spent in the air when the angle of launch is 50°, we have;

T_1 = \dfrac{2 \cdot u \cdot sin(25^{\circ}) }{g}

T_2 = \dfrac{2 \cdot u \cdot sin(50^{\circ}) }{g}

sin(50°) > sin(25°), therefore, we have;

\dfrac{2 \cdot u \cdot sin(50^{\circ}) }{g} >   \dfrac{2 \cdot u \cdot sin(25^{\circ}) }{g}

Therefore;

T₂ > T₁

Therefore, increasing the angle at which the projectile is launched from 25° to 50° will increase the total time spent in the air.

7 0
2 years ago
Other questions:
  • PLEASE help me!!! ASAP!! Ill mark you as brainliest!!!!
    9·1 answer
  • Define compound and list two examples.
    5·2 answers
  • A particle moves on a line away from its initial position so that after t hours it is s = 6t2 + 2t miles from its initial positi
    15·1 answer
  • A remote controlled car is moving in a vacant parking lot. The velocity of the car as a function of time is given by v= [5.00 m/
    8·1 answer
  • Sarah is sitting at the top of the slide in the school's playground. Which of the following changes will increase Sarah's kineti
    9·1 answer
  • A rocket is launched from the launch pad at a speed of 700 km/hr.
    7·1 answer
  • What do we mean by "Ohmic"?
    6·1 answer
  • (Brainliest) How are radio waves used in cell phone wireless communication technology?
    12·1 answer
  • You and your dog are playing tug-of-war. For a while, neither of you are winning but after a few hard tugs, your dog pulls the t
    10·1 answer
  • A car starts from rest and accelerates to 14 m/s in 2 seconds. What was its acceleration
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!