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2 years ago

7

As a substance melts, heat energy is used to break the connections between molecules, and temperature __________ until all melti

ng is complete. question 1 options:

1 answer:

mario62 [17]2 years ago

4 0

Temperature stays the same

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What are the three factors that affect surface ocean currents

Natali5045456 [20]

Continental deflections, the Coriolis effect and global winds all affect surface ocean currents.

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2 years ago

An object is attached to a vertical spring and bobs up and down between points a and

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it would be at either A or B.

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2 years ago

A 2800 kg truck moving at 12 m/s to the right hits a stopped 1100 kg car. What is the combined velocity the moment they stick to

leva [86]

Answer:

The combined velocity is 8.61 m/s.

Explanation:

Given that,

The mass of a truck, m = 2800 kg

Initial speed of truck, u = 12 m/s

The mass of a car, m' = 1100 kg

Initial speed of the car, u' = 0

We need to find the combined velocity the moment they stick together. Let it is V. Using the conservation of momentum.

$m_1v_1+m_2v_2=(m_1+m_2)V\\\\V=\dfrac{m_1v_1+m_2v_2}{(m_1+m_2)}\\\\V=\dfrac{2800\times 12+0}{2800+1100}\\\\V=8.61\ m/s$

So, the combined velocity is 8.61 m/s.

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2 years ago

When a certain element is excited with electricity, we see three main lines in its emission spectrum: two red lines and one oran

Eddi Din [679]

The absorption spectrum would have all the wavelengths of the light source but would have black lines where the two red and one orange lines were in the emission spectrum

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3 years ago

1. A wave has a wavelength of 5 m and a frequency of 2 Hz. At what speed/velocity does the

yuradex [85]

Answer:

1.10m/s

2.0.1m

3.5Hz

Explanation:

v=velocity, f=frequency and T=wavelength

1.v=ft

v=2x5

=10m

2.v=ft

100=1000T

divide both sides by 1000

T=0.1m

3.v=fT

25=5f

divide both sides by 5

f=5Hz

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2 years ago