Ask question

Ask question

All categories

3 years ago

5

An object is released from rest on a planet that has no atmosphere. The object falls freely for 2.31 m in the first second. What

is the magnitude of the acceleration due to gravity on the planet? Answer in units of m/s^2 .

1 answer:

Ede4ka [16]3 years ago

4 0

s=1/2 a t^2

2.31 = 0.5xa

a=4.62m/s^2

You might be interested in

Water has a specific heat capacity nearly nine times that of iron. Suppose a 50-g pellet of iron at a temperature of 200∘C is dr

miv72 [106K]

Answer:

a. closer to 20∘C

Explanation:

$m_{p}$ = mass of pallet = 50 g = 0.050 kg

$c_{p}$ = specific heat of pallet = specific heat of iron

$T_{pi}$ = Initial temperature of pellet = 200 C

$m_{w}$ = mass of water = 50 g = 0.050 kg

$c_{w}$ = specific heat of water

$T_{wi}$ = Initial temperature of water = 20 C

$T_{e}$ = Final equilibrium temperature

Also given that

$c_{w} = 9 c_{p}$

Using conservation of energy

Energy gained by water = Energy lost by pellet

$m_{w} c_{w} (T_{e} - T_{wi}) = m_{p} c_{p} (T_{pi} - T_{e})\\(0.050) (9) c_{p} (T_{e} - 20) = (0.050) c_{p} (200 - T_{e})\\ (9) (T_{e} - 20) = (200 - T_{e})\\T_{e} = 38 C$

hence the correct choice is

a. closer to 20∘C

4 0

4 years ago

What makes up a nucleus of an atom

Tanzania [10]

The nucleus is the center of an atom.

6 0

4 years ago

In order to cool 1 ton of water at 20°C in an insulated tank, a person pours 140 kg of ice at –5°C into the water. The specific

salantis [7]

Answer:

$T = 6.31 ^0 C$

Explanation:

1 ton = 907.2 kg

so here heat given by water = heat absorbed by the ice

so by energy balance we will have

$Q_1 = Q_2$

$mL + ms\Delta T_1 + ms\Delta T_2 = ms\Delta T_3$

so we have

$140(2.11)(5) + 140(333.7) + 140(4.18)(T) = 907.2(4.18)(20 - T)$

$48195 + 585.2 T = 75841.9 - 3792.1 T$

$T = \frac{27646.92}{4377.3}$

$T = 6.31 ^0 C$

7 0

3 years ago

An example of an anaerobic exercise is what?

san4es73 [151]

Answer:

1st: Theatre History

4th Quarter

Upcoming

Due today

Syllabus

Due Sunday1st: Theatre History

4th Quarter

Upcoming

Due today

Syllabus

Due Sunday1st: Theatre History

4th Quarter

Upcoming

Due today

Syllabus

Due Sunday

Explanation:

1st: Theatre History

4th Quarter

Upcoming

Due today

Syllabus

Due Sunday

6 0

3 years ago

Two children fight over a 200g stuffed bear. The 25kg boy pulls to the right with a 15N force and the 20kg girl pulls to the lef

Sati [7]

The masses of the children may not be taken into account since these are towards the ground and directly affecting the bear. The net force is the difference of the forces since they are acting on opposite sides. The magnitude of this net force is equal to 2N and the sign is to where the greater force is from. Therefore, the force is directed towards the left.

3 0

3 years ago