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
Anna11 [10]
4 years ago
13

Can someone please help me. idk what to do​

Physics
1 answer:
Alex_Xolod [135]4 years ago
3 0

Answer:

-4.5 m/s

Explanation:

Even without doing calculations, we know that a projectile has the same speed coming down as it did going up at the same height.  Since it went up at 4.5 m/s, it returns down at -4.5 m/s.

To prove it with math, use the given information:

v₀ = 4.5 m/s

a = -9.8 m/s²

Δy = 0 m

Find: v

v² = v₀² + 2aΔy

v² = (4.5 m/s)² + 2 (-9.8 m/s²) (0 m)

v = -4.5 m/s

You might be interested in
If a planet has an eccentricity of 0.92 and a distance of the major axis is 5,000,000 km, then what is the distance between foci
VladimirAG [237]

Answer:

it’s the third option: 4,600,000 km

Explanation:

just took the test and that was correct

6 0
3 years ago
A person drives north 8 blocks, then turns west and drives 4 blocks. The driver then turns south and drives 8 blocks. How could
stealth61 [152]

A person would be driving 4 blocks west from the starting point to make the shorter distance while maintaining same displacement.

<u>Explanation:</u>

The measurement of an object’s position change from its point is called displacement. It is usually calculated from starting to the end points and represented by ‘delta s’. In the given scenarios, the person drove in the way that he finals the driving by 4 blocks away from the west.

Means, the persons drive to 8 blocks north and then to 8 blocks south get cancelled. Hence, to make the shorter distance with maintaining same displacement he would be driving 4 blocks west from the starting point.

7 0
3 years ago
There are four major auto routes from boston to detroit and six from detroit to los angeles. how many major auto routes are ther
Ilia_Sergeevich [38]
For each route from Boston to Detroit, there are 6 possible routes to Los Angeles.
Therefore if there are 4 routes from Boston to Detroit, the number of routes from Boston to Los Angeles is
4*6 = 24
The diagram shown below illustrates the possible routes.

Answer: 24

6 0
3 years ago
A 20 liter cylinder of helium at a pressure of 150 atm and a temperature of 27ÁC is used to fill a balloon at 1.00 atm and 37ÁC.
djyliett [7]

<u>Answer</u>

D) 3100 Liters


<u>Explanation</u>

To get the volume if the balloon you need to use the combined equation of the low of gases.

P₁V₁/T₁ = P₂V₂/T₂

(20×150)/(27+273) = (1×V₂)/(37+273)

3000/300 = V₂/310

10 = V₂/310

V₂ = 10 × 310

    = 3100 Liters


7 0
3 years ago
Read 2 more answers
What ways might a superhero utilize magnetic forces to move, levitate or travel from place to place?
swat32

Answer:

He could use magnets to lift heavy things and also move things like a train

Explanation:

i had the same question

7 0
3 years ago
Other questions:
  • Two trains travel at right angles to each other after leaving the same train station at the same time. Two hours later they are
    8·2 answers
  • When did dalton form his atomic theory?
    14·2 answers
  • Why do we use average force while solving momentum problems? How is net force related to the momentum of the object?
    15·1 answer
  • Imagine two artifical satellites with equal masses orbiting earth.One satellite is orbiting closer to earth than the other satel
    5·1 answer
  • Which of these geologic events is most closely associated with a transform plate boundary?
    9·1 answer
  • A long, straight wire carrying a current is placed along the y-axis. If the direction of the current is in the +y direction, wha
    14·1 answer
  • Please help with 19
    15·1 answer
  • What is the mechanical advantage of this system?<br> А<br> 2<br> B<br> 3<br> C<br> 4
    10·1 answer
  • A young girl is pulling two children in a wagon and she is late getting home. How can she make the wagon increase in speed witho
    11·1 answer
  • The wave function for a wave on a taut string isy(x, t) = 0.350 sin (10πt - 3πx + π/4)where x and y are in meters and t is in se
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!