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
garri49 [273]
3 years ago
5

A swimmer pushes backwad on water with their hand...what force allows the swimmer to move forward?

Physics
1 answer:
kvv77 [185]3 years ago
8 0
Force that is of equal magnitude
You might be interested in
A circular plate of 500-mm diameter is maintained at T1 = 600 K and is positioned coaxial to a conical shape. The back side of t
drek231 [11]
For part a)
Since the conical surface is not exposed to the radiation coming from the walls only from the circular plate and assuming steady state, the temperature of the conical surface is also equal to the temperature of the circular plate. T2 = 600 K

For part b)
To maintain the temperature of the circular plate, the power required would be calculated using:
Q = Aσ(T₁⁴ - Tw⁴)
Q = π(500x10^-3)²/4 (5.67x10^-8)(600⁴ - 300⁴)
Q = 5410.65 W
5 0
3 years ago
How much time would it take for an
Elina [12.6K]

36 and a half hours

Explanation:

4 0
3 years ago
1. An express train, traveling at 36 m/s, is accidentally sidetracked onto a local train track. The express engineer spots a loc
Colt1911 [192]

Answer:

(i) 12 seconds

(ii) 216 meters from the initial position

(iii) 132 meters from the initial position

(iv) No

Explanation:

Speed of express train =36 m/s

Speed of local train =11 m/s

The initial distance between the local train and passenger train =100 m.

Due to the application of breaks, the express train slows at the rare of 3.0 m/s^2.

So, the acceleration of the express train, a=-3 m/s^2.

(i) Let t be the time the express train takes to stop.

From the equation of motion,

v=u+at

where, v: final velocity, u: initial velocity, a: constant acceleration, t: time taken to change the speed from u to v.

In this case, v=0, u=36 m/s, a=-3 m/s^2

So, 0=36+(-3)t

\Rightarrow t= 36/3=12 seconds.

(ii) To compute the distance traveled, s, till the express train stops, using

v^2=u^2+2as

\Rightarrow 0^2=36^2+2(-3)s

\Rightarrow s=\frac{36\times36}{6}

\Rightarrow s=216 meters.

(iii) The local train is moving at a speed of 11 m/s

So, in 12 seconds, the distance, d, traveled by the local train

d= 11x12=132 meters [as distance= speed x time]

(iv) Let 0 be the reference position which is the initial position of the express train.

So, at the initial time, the position of the local train is at 100m.

After 12 seconds:

The position of the express train is at 216 m [using part (ii)]

and the position of the local train is at 100+132=232m  [using part (iii)].

So, the local train is still ahead of the express train, hence the trains didn't collide.

6 0
3 years ago
What foxes need to eat to<br> stay alive​
11Alexandr11 [23.1K]

Answer:

<h3>They eat meat and vegetation. </h3>
8 0
2 years ago
Read 2 more answers
Which material reflects the most light??​
gogolik [260]
The aluminum foil would reflect the most light !
7 0
3 years ago
Other questions:
  • What is mass?
    12·1 answer
  • A car and a train move together along straight, parallel paths with the same constant cruising speed v(initial). At t=0 the car
    11·1 answer
  • Calculate the orbital period for Jupiter's moon Io, which orbits 4.22×10^5km from the planet's center (M=1.9×10^27kg) .
    5·1 answer
  • A bell is rung. What best describes the density of air around the bell? The air density does not change. The air density increas
    6·2 answers
  • What is not a factor affecting impact in a collision; vehicle weight, speed, kinetic energy, centrifugal force
    5·1 answer
  • Based on what you have learned from this unit, construct a tri-fold brochure instructing a new freshman as to the best way to le
    10·1 answer
  • What is the measure of disorder in a system called? A. efficiency B. Enthalpy C. Work D. Entropy
    5·2 answers
  • Determine the kinetic energy of a 1000-kg roller coaster car that is moving with a speed of 20.0 m/s
    9·1 answer
  • Can someone pls help me?!!!! i need it asap!! i’m very stressed
    5·1 answer
  • ფიზიკაში მჭირდება დახმარება ნაგლმა მასწავლებელმა მთელი თვე გააცდინა და როცა დაბრუნდა ეგრევე საკონტროლო ისეთი საკითხებით რომელიც
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!