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3 years ago

A frisbee is flying through the air. Which forces are acting on it (choose 3)

Physics

1 answer:

qwelly [4]3 years ago

6 0

Answer:

The force acting on it is lift

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The temperature of 2.0 g of helium is increased at constant volume by ΔT. What mass of oxygen can have its temperature increased

gavmur [86]

Answer:

m = 9.6 g

Explanation:

Thermal energy given to helium gas at constant volume is given as

$Q = nC_v \Delta T$

so here we have

$C_v = \frac{3}{2}R$

$n = moles$

$n = \frac{2}{4} = 0.5$

so we have

$Q = \frac{3}{2}R(0.5)\Delta T$

now we know that

for oxygen gas we have

$C_v = \frac{5}{2}R$

for same amount of heat we have

$Q = nC_v \Delta T'$

$\frac{3}{2}R(0.5)\Delta T = \frac{m}{32} (\frac{5R}{2}) \Delta T$

$m = \frac{0.75 \times 32}{2.5}$

$m = 9.6 g$

8 0

3 years ago

Which quantity is a vector quantity A. Acceleration B. Mass C. Speed D. Volume

Marianna [84]

Answer:

Acceleration

Explanation:

A vector quantity has a magnitude and direction. Mass, Speed and Volume are all scalar quantities because they only have magnitude, and not direction.

5 0

3 years ago

Which of newtons laws is illustrated by a squid moving forward by shooting water out behind it? Why?

Dimas [21]

I believe its newtons 3rd law for every action there is an equal but opposite reaction since the squid is moving foward by shooting the water its pushing the squid back as its reaction. Hope this helped !

5 0

4 years ago

Coherent light with wavelength 599 nm passes through two very narrow slits with separation of 20 μm, and the interference patter

goblinko [34]

Answer:

134.77 mm

Explanation:

Wave length of light λ = 599 x 10⁻⁹ m

Slit separation d = 20 x 10⁻⁶ m

Screen distance D = 3 m

Distance of second dark fringe from centre

= 1.5 x λ D / d

Putting the values given above

distance = $\frac{1.5\times599\times10^{-9}\times 3}{20\times10^{-6}}$

= 134.77 x 10⁻³ m

= 134.77 mm.

7 0

4 years ago

Oxygen forms many compounds.<br> Which two compounds of oxygen are small molecules?

Liono4ka [1.6K]

Answer:

Water and Oxides such as iron oxide or rust

Explanation:

8 0

3 years ago

A frisbee is flying through the air. Which forces are acting on it (choose 3)​

A frisbee is flying through the air. Which forces are acting on it (choose 3)