3 years ago

For a given wave if the frequency doubles the wave length?

1 answer:

5 0

For a given wave in a given medium, if the frequency doubles,
the wavelength becomes 50% shorter.

That is, it becomes half as long as it was originally.

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An astronaut went out for a spacewalk and became stranded some distance away from her space station. All she has with her is her

weeeeeb [17]

Answer:

If she has a magnifying glass in her tool box then just retrace your steps.

4 0

3 years ago

Kevin has a mass of 87 kg and is skating with in-line skates. He sees his 22-kg younger brother up ahead standing on the sidewal

neonofarm [45]

Answer:

$V_ k = 3 m/s$

Explanation:

Using the conservation of the linear momentum P:

$P_i = P_f$

so:

$M_kV_k = M_sV_s$

where $M_k$ is the mass of kevin, $V_k$ is the velocity of kevin before he grabs her brother, $M_s$ is the velocity of her brother and him after grabs her brother and $V_s$ is the velocity of both after the collition.

So, replacing the values and solving for Vk, we get:

$(87 kg)V_k = (87 kg+22 kg)(2.4m/s)$

$V_ k = 3 m/s$

8 0

3 years ago

Which answer below correctly identifies the type of change and the explanation for the heating of copper sulfate pentahydrate?

dolphi86 [110]

Answer:

chemical change because gas formation was observed along with a color change, which indicated that the copper sulfate pentahydrate was transformed into a different substance

Explanation:

i took a test

6 0

4 years ago

A child is riding a merry-go-round, which has an instantaneous angular speed of 1.25 rad/s and an angular acceleration of 0.745

Elena L [17]

w = instantaneous angular speed = 1.25 rad/s

r = radius = 4.65 m

α = angular acceleration = 0.745 rad/s²

centripetal acceleration is given as

$a_{c}$ = rw²