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3 years ago

If a car is travelling 120 miles southbound for 3 hours, what is the velocity?

Physics

2 answers:

Zinaida [17]3 years ago

4 0

Answer:

40 miles / hour south

Explanation:

120 miles/3 hours = 40 miles / hour

allsm [11]3 years ago

4 0

Answer:

v = 40 miles / hour

Explanation:

using velocity formula v = d / t

where d = distance and t = time

120 miles

v = --------------

3 hours

v = 40 miles / hour

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A plane flies 1,995 miles in a southwesterly direction from Baltimore to Phoenix in 5.00 hours . What is the velocity of the pla

disa [49]

displacement of the plane is given as

$d = 1995 miles$

time taken by the plane

$t = 5.00 hours$

now the velocity is given as

$v = \frac{displacement}{time}$

$v = \frac{1995}{5}$

$v = 399 mi/h$

so the velocity of airplane is 399 mi/h towards South West

4 0

3 years ago

What is the mass of an object that is 6kg on a planet with an acceleration due to gravity

goldfiish [28.3K]

Answer:

Mass of the body will be = 6 kg

Explanation:

Given:

Mass of an object = 6 kg

Acceleration due to gravity of the planet = 10 $m/s^2$

To find the mass of the body on that planet.

Solution:

Mass of the body is defined as the total amount of matter contained in the body.

Thus, mass of a body will always remain constant irrespective of the acceleration due to gravity. This is because it is an independent quantity and does not vary with acceleration due to gravity.

It is the weight of the body that changes with the change in the acceleration due to gravity as it is given by:

$W=mg$

where $m$ represents mass of the body and $g$ represents the accelration due to gravity.

Hence, the mass of the given body will remain = 6 kg.

6 0

3 years ago

A moss begins to grow on a rock in an area that was previously uninhabited by life. This is an example of a .

Kitty [74]

Answer: primary ecological succession

Explanation:

Primary ecological succession: This occurs when a certain or some organisms dominate an area that was uninhabited of life. This may happen after a natural disaster that leaves the land barren. The presence of these organisms on the barren land will help the soil occupied to gain nutrients which will eventually allow some other plants to grow on it. The growth of plants will later invite insects and insects may invite animals.

8 0

3 years ago

Read 2 more answers

In which process will the internal energy of the system NOT change? a. An adiabatic expansion of an ideal gas.

marusya05 [52]

Answer:

B. An isothermal compression of an ideal gas.

Explanation:

The internal energy of an ideal gas is just function of the temperature; it does not matter what other thermodynamic property changes, if the temperature does not change, the internal energy neither does. That is just for ideal gases; real gases behaviour is not like that. All of the other options bring with them an increase or decrease of the temperature:

For A, the temperature will decrease because the gas will do work as it expands, converting part of his internal energy to work.

For C, the temperature will increase, because given $PV=nRT$ , if the volume increases (expansion) and the pressure is constant, the temperature must increase to satisfy the equation.

3 0

4 years ago

A helium balloon is filled to a volume of 2.88 x 103 L at 722 mm Hg and 19Â°C. When the balloon is released, it rises to an alti

inn [45]

Answer:

V₂=4.57 x 10³ L

Explanation:

Given that

V₁= 2.88 x 10³ L

P₁=722 mm Hg

T₁ = 19°C

T₁ =292 K

P₂=339 mm Hg

T₂= - 55°C

T₂=218 K

Lets take final volume = V₂

We know that ideal gas equation

PV = m R T

By applying mass conservation

$\dfrac{P_1V_1}{RT_1}=\dfrac{P_2V_2}{RT_2}$

$\dfrac{722\times 2.88\times 10^3}{292}=\dfrac{339\times V_2}{218}$

V₂=4.57 x 10³ L

Therefore volume will be 4.57 x 10³ L

3 0

3 years ago