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
Fittoniya [83]
3 years ago
12

What was the near extinction of many birds was caused by

Physics
1 answer:
Nat2105 [25]3 years ago
5 0
I believe the use of DDT
You might be interested in
Firefighters are holding a nozzle at the end of a hose while trying to extinguish a fire. If the nozzle exit diameter is 8 cm an
kobusy [5.1K]

Answer:

Answer for the question is given in the attachment.

Explanation:

5 0
3 years ago
Read 2 more answers
At what distance r from a point charge is the electric potential due to that point charge 0 v?
galben [10]

Answer:

Infinite Distance

Explanation:

The electric potential due to a point charge can be expressed by the following equation:

V=\frac{kQ}{r}

Here,

V is the electric potential due to the point charge

k is the proportionality constant

Q is the magnitude of the point charge

r is the distance from the charge

As the value of r increases, the value of V decreases since there is an inverse relation between the two. The value of V can be absolutely 0 when the distance from the charge is infinite i.e. r is infinite. Mathematically, dividing a number by infinity results in zero. Also theoretically speaking, at infinite distance the electric field lines won't approach and hence the electric potential would be zero.

8 0
3 years ago
Why is knowing the direction of the force important?
vodomira [7]
Knowing the direction of a force is important because it helps someone know the motion of the object. if you use a free body diagram, then it becomes easy to see all the forces being applied to an object. if there is more force going one way, the object is accelerating in that direction. if all the forces cancel each other out, then the object is at a constant speed or is at rest.
4 0
3 years ago
Two 0.40 kg soccer ball collide elastically in a head-on collision. The first ball starts at rest, and the second ball has a spe
yulyashka [42]

Explanation:

Mass of two soccer balls, m_1=m_2=0.4\ kg

Initial speed of first ball, u_1=0

Initial speed of second ball, u_2=3.5\ m/s

After the collision,

Final speed of the second ball, v_2=0

(a) The momentum remains conserved. Using the conservation of momentum to find it as :

m_1u_1+m_2u_2=m_1v_1+m_2v_2

v_1 is the final speed of the first ball

0.4\times 0+0.4\times 3.5=0.4v_1+0.4\times 0

0.4\times 3.5=0.4v_1

v_1=3.5\ m/s

(b) Let E_1 is the kinetic energy of the first ball before the collision. It is given by :

E_1=\dfrac{1}{2}mu_1^2

E_1=\dfrac{1}{2}\times 0.4\times 0

It is at rest, so, the kinetic energy of the first ball before the collision is 0.

(c) After the collision, the second ball comes to rest. So, the kinetic energy of the second ball after the collision is 0.

Hence, this is the required solution.

7 0
3 years ago
Read 2 more answers
A child’s toy arrow is launched horizontally from a bow at a speed of 8 m/s from a second story window 4 meters above the ground
Westkost [7]
First find the time it takes to hit the sand t
using s=1/2 g t^2
t^2= 8/9.8= 0.82 seconds
This means the sand was s = 8 * 0.82 = 6.5m away
The horizontal speed stays constant at 8 m/s
The vertical speed =.82 * 9.8 = 8.0 m/s
As the two velocities are equal the angle must be 45 degrees to the horizontal
7 0
3 years ago
Other questions:
  • Is the air around us organic
    7·2 answers
  • What is your opinion on Moonman? ( Do not delete this saying it is "racist". it is simply a character from a commercial called M
    10·1 answer
  • The acceleration due to the earth's gravity, in si units, is 9.8 m/s2. in the absence of air friction, a ball is dropped from re
    15·1 answer
  • What is the shape of a projectile
    15·1 answer
  • A bulb is rated as 25Watt -250 Volt. On connecting this bulb to a mains of 250 volts, what will be the value of current (I) flow
    5·1 answer
  • Si se arroja una ròca en sentido horizontal desde un barranco de 100 m de altura. Choca
    8·1 answer
  • A 70 kg student stands on top of a 5.0 m platform diving board . how much gravitational potential energy does the student have?
    11·1 answer
  • 800 joules of work were done with a force of 200 newtons. Over what
    13·1 answer
  • A balloon contains 0.04m3 of air at a pressure of 1.20 x 105Pa. Calculate the pressure required to reduce its volume to 0.025m3
    7·1 answer
  • 2. What kinds of statistics are used in sports? In a paragraph explain your answer with examples
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!