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
Arada [10]
2 years ago
9

Humans protect themselves from natural disasters by all of the following except

Physics
1 answer:
jeyben [28]2 years ago
4 0
I'm pretty sure it's sunscreen
You might be interested in
A projectile is fired with initial speed vo at an angle of 45o above the horizontal. Assume no air resistance.
katrin2010 [14]

Answer:

The correct answer is a

Explanation:

At projectile launch speeds are

X axis     vₓ = v₀ = cte

Y axis     v_{y} = v_{oy} –gt

The moment is defined as

         p = mv

For the x axis

         pₓ = mvₓ = m v₀ₓ

As the speed is constant the moment is constant

For the y axis

        p_{y} = m v_{y} = m (v_{oy} –gt) = m v_{oy} - m (gt)

Speed ​​changes over time, so the moment also changes over time

Let's examine the answer

i   True

ii False.  The moment changes with time

The correct answer is a

7 0
3 years ago
A shovel is the third class lever​
Nookie1986 [14]

Answer:

Yes

Explanation:

In a third-class lever, the effort force lies between the resistance force and the fulcrum. Some kinds of garden tools are examples of third-class levers. When you use a shovel, for example, you hold one end steady to act as the fulcrum, and you use your other hand to pull up on a load of dirt.

8 0
3 years ago
in the system to the right, the pulleys are frictionless and the system hangs in equilibrium. Determine the values of each of th
irga5000 [103]
Look up pulleys problem through Khan academy and a video should pop up with a problem similar and you should be able to walk through it .
4 0
2 years ago
What is physics? In your own words too
denis23 [38]
The study of how the world works
4 0
2 years ago
Shareen finds that when she drives her motorboat upstream she can travelwith a speed of only 8 m/s, while she moves with a speed
ANEK [815]

Let vb be the velocity of the motorboat and let vs be the velocity of the stream.

We know that when she drives upstream the velocity is 8 m/s, in this scenario the velocities point in opposite directions, then we have the equations:

v_b-v_s=8

When she drives downstream the velocites point in the same direction then we have the equation:

v_b+v_s=12

hence we have the system of equations:

\begin{gathered} v_b-v_s=8 \\ v_b+v_s=12 \end{gathered}

Solving the first equation for the velocity of the boat we have:

v_b=8+v_s

Plugging this in the second equation we have:

\begin{gathered} 8+v_s+v_s=12 \\ 2v_s=4 \\ v_s=\frac{4}{2} \\ v_s=2 \end{gathered}

Therefore, the velocity of the stream is 2 m/s

5 0
1 year ago
Other questions:
  • If one replaces the conducting cube with one that has positive charge carriers, in what direction does the induced electric fiel
    14·1 answer
  • ok so for 99 points(not multiple choice)what is one way to separate salt from grains NO MULTIPLE CHOICE
    11·2 answers
  • How many microphones are in a megaphone?
    10·1 answer
  • A robot probe drops a camera off the rim of a 278 m high cliff on Mars, where the free-fall acceleration is 3.7 m/s2 . Find the
    9·1 answer
  • Select all that apply.
    5·1 answer
  • If an object with a mass of 12 kilograms is moving at 10 meters per second, what is its momentum?
    6·1 answer
  • A cheetah can run at approximately 100 km/hr and a gazelle at 80.0 km/hr. If both animals are running at fullspeed, with the gaz
    5·1 answer
  • a boy throws a small stone into a pond. waves spread out from where the stone hits the water and travel to the side of the pond.
    9·1 answer
  • I need help finding the solution
    10·1 answer
  • What is a law in physics? state the criteria for a statement to be a law.​
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!