2 years ago

Which of the following is a true statement?

Physics

2 answers:

nirvana33 [79]2 years ago

6 0

the answer is heat energy is produced by friction

kakasveta [241]2 years ago

5 0

Answer is number 4 which is heat energy is produced by friction

You might be interested in

Thirty five soccer players were challenged to do as many sit-ups possible in two minutes

Ghella [55]

Answer:

Explanation:

What is the question?

7 0

3 years ago

As one moves farther and farther from the Sun, the distance between adjacent planets is _____.

Alenkinab [10]

As one moves farther and farther from the Sun, the distance between adjacent planets is greater.

4 0

3 years ago

Ocean waves carry water from hundreds of miles away

GenaCL600 [577]

Yes, ocean waves can carry water from hundreds miles away.

8 0

3 years ago

Read 2 more answers

A firecracker in a coconut blows the coconut into three pieces. Two pieces of equal mass fly off south and west, perpendicular t

Lisa [10]

Explanation:

Let us assume that piece 1 is $m_{1}$ is facing west side. And, piece 2 is $m_{2}$ facing south side.

Let $m_{1} \text{and} m_{2}$ = m and $m_{3}$ = 2m. Hence,

$2mv_{3y} = m(21)$

$v_{3y} = \frac{21}{2}$

= 10.5 m/s

$2mv_{3x} = m(21)$

$v_{3x} = \frac{21}{2}$

= 10.5 m/s

$v_{3} = \sqrt{v^{2}_{3x} + v^{2}_{3y}}$

= $\sqrt{(10.5)^{2} + (10.5)^{2}}$

= 14.84 m/s

or, = 15 m/s

Hence, the speed of the third piece is 15 m/s.

Now, we will find the angle as follows.

$\theta = tan^{-1} (\frac{v_{3y}}{v_{3x}})$

= $tan^{-1}(\frac{10.5}{10.5})$

= $tan^{-1} (45^{o})$

= $45^{o}$

Therefore, the direction of the third piece (degrees north of east) is north of east.

5 0

4 years ago

Why don't lights turn green for both north and south bound traffic?

harina [27]

because its has energy and uses it natural energy from the ground

8 0

4 years ago