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3 years ago

13

The Celsius tempersture scale is based on which of the following? a) vapor b) the human body c) the boiling point of air d) the

boiling and freezing points of water

2 answers:

Darina [25.2K]3 years ago

8 0

I think d is the correct answer

tatuchka [14]3 years ago

8 0

I believe the answer is D because the freezing point for water is 0, and the boiling point is 100 in the Celsius scale, so D makes the most sense

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Where would a Christmas tree be most likely to grow?

sveticcg [70]

Taiga is the answer.

Hope it helps!

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3 years ago

A Bullet Off mass 100 gm is fired From A Gun Off mass 5 Kg. If the backward velocity of the gun's 5 m / s, what is forward veloc

Elena L [17]

Answer:

250 m/s

Explanation:

The mass of the bullet, m₁ = 100 g = 0.1 kg

The mass of the gun, m₂ = 5 kg

The backward velocity of the gun, v₂ = -5 m/s

Given that the momentum is conserved, we have;

The total initial momentum = The total final momentum

The gun and the bullet are at rest, therefore, we have;

The initial momentum = 0

The total final momentum = m₁·v₁ + m₂·v₂

Where;

v₁ = The forward velocity of the bullet

Therefore, we get;

m₁·v₁ + m₂·v₂ = 0

0.1 kg × v₁ + 5 kg × (-5 m/s) = 0

0.1 kg × v₁ = 5 kg × 5 m/s

v₁ = (5 kg × 5 m/s)/(0.1 kg) = 250 m/s

The forward velocity of the bullet, v₁ = 250 m/s

6 0

3 years ago

Consider the following kinds of electromagnetic waves:

marysya [2.9K]

Answer:

According to wavelengths in descending order: C, B, D, E and A

According to frequencies in descending order: A, E, D, B and C

According to speeds in vacuum: A =B =C =D =E

Explanation:

in the EM spectrum, radio waves have the longest wavelength while gamma rays have the shortest wavelength.

All EM waves travel with the same speed of $3*10^8m/s$ in a vacuum.

7 0

3 years ago

In everyday situations, it does seem that a force is needed to keep an object, for example the shopping trolley, moving at a con

Jobisdone [24]

Answer:

Because of friction

Explanation:

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3 years ago

Read 2 more answers

cheAt an amusement park, a swimmer uses a water slide to enter the main pool. If the swimmer starts at rest, slides without fric

KiRa [710]

Answer:

$v \approx 7.371\,\frac{m}{s}$

Explanation:

The swimmer can be modelled by the Principle of Energy Conservation. The speed is derived herein:

$m_{swimmer}\cdot g \cdot h = \frac{1}{2}\cdot m_{swimmer}\cdot v^{2}$

$v = \sqrt{2\cdot g \cdot h}$

$v = \sqrt{2\cdot (9.807\,\frac{m}{s^{2}} )\cdot (2.77\,m)}$

$v \approx 7.371\,\frac{m}{s}$

3 0

4 years ago