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
tigry1 [53]
3 years ago
9

12. A sprinter has an acceleration of 5m/s” during the first 2 seconds of the race. What

Physics
1 answer:
Gala2k [10]3 years ago
7 0

Answer:

v=10m/s

Explanation:

a=\frac{vf-vi}{t}\\ 5m/s^{2}=\frac{vf-0}{2}\\  vf=5*2\\vf=10 m/s

You might be interested in
High blood pressure can lead to all of the following except: Question 3 options: A) stroke B) vision loss C) aerobic fitness D)
Fantom [35]

Answer:

C) Aerobic Fitness

Explanation:

High blood pressure doesn't affect your aerobic fitness.

6 0
3 years ago
Read 2 more answers
What velocity will it take to slingshot a planet with 9.8m/s gravity
Yuri [45]
It depends on how close you get to it. Remember that its gravity decreases as you get farther from it.
3 0
4 years ago
An object is taken from an oven at 350o F and left to cool in a room at 70o F. If the temperature fell to 250o F in one hour, wh
Oksana_A [137]

Answer:

117.83° F

Explanation:

Using Newton's Law of Cooling which can be expressed as:

\dfrac{dT}{dt}= k(T-T_1)

The differential equation can be computed as:

\dfrac{dT}{dt}= k(T-70)

\dfrac{dT}{(T-70)}= kdt

\int \dfrac{dT}{(T-70)}= \int kdt

In|T-70| = kt +C

T- 70 = e^{kt+C} \\ \\ T = 70+e^{kt+C} \\ \\ T = 70 + C_1e^{kt}  --- (1)

where;

C_1 = e^C

At the initial condition, T(0)= 350

350 = 70 C_1^{k*0}

350 -70 = C_1

280 = C_1

replacing C_1= 280 into (1)

Hence, the differential equation becomes:

T(t) = 70 + 280 e^{kt}

when;

time (t) = 1 hour

T(1) = 250

Since;

250 = 70 + 280 e^{k*1}

180 = 280e^k \\ \\ \dfrac{180}{280}= e^k

k = In (\dfrac{180}{280})

k = -0.4418

Therefore;

T(t) = 70 + 280e^{(-0.4418)}t

After 4 hours, the temperature is:

T(t) = 70 + 280e^{(-0.4418)}4

T(4) = 117.83° F

7 0
3 years ago
It takes Serina 4.44 hours to drive to school. Her route is 15 km long. What is Serina’s average speed on her drive to school?
Svet_ta [14]

Answer: 3.38 km per hour

Explanation:

3 0
3 years ago
A planet’s gravity is related to which of the following? (Points : 5)
katovenus [111]

-- <span>The gravitational force that you feel when you stand on the surface
of a planet depends on the planet's mass and size.  It has </span><span><span>nothing
to do with the planet's orbit.  (</span>Of course,"size" is also related to the
planet's mass, density, and surface area.)

-- One possible cause of deforestation is the removal of trees without
adequate replanting.

-- According to Hubble’s Law, the farther away a galaxy is, the faster
it is moving away from us

-- Electromagnetic energy can be defined as energy that moves at
the speed of light.  If you conduct experiments to determine whether
the electromagnetic energy is moving in the form of particles or waves,
you find that it behaves as both.</span>


4 0
3 years ago
Other questions:
  • An object moves with a constant velocity of 17 m/s for 200 s. How far did it move during that time?
    12·1 answer
  • How are metal bridges built to cope with changes of temperature?
    9·1 answer
  • If scientists noted that a protozoan developed a cyst, they could safely assume that:
    7·1 answer
  • NEED HELP ASAP
    9·1 answer
  • a stone is thrown vertically upward with a velocity of 29.4m/s from the top of tower 34.3m high.calculate the total time taken b
    7·1 answer
  • Compared to wave B, which wave has a longer wavelength but the same amplitude?
    9·1 answer
  • What are some different kinds of bias and how can they ruin a research project
    11·2 answers
  • Jordan wants to see if earthworms prefer rough or smooth terrain to crawl through. What will be his
    8·1 answer
  • Explain what happens to particles during a phase
    11·1 answer
  • What is the velocity of the person walking below?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!