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2 years ago

1.Force that pulls toward the center of mass.

Physics

2 answers:

kondaur [170]2 years ago

7 0

Gravity if I’m not mistaken

monitta2 years ago

3 0

Gravity– a natural force that pulls objects downward. Earth's gravity pulls us and all objects downwards towards its center.

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A wave with a frequency of 500 Hz is traveling at a speed of 200 m/s. What is the wavelength?

pshichka [43]

Answer:0.4 is what i got

Explanation:

200÷500

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2 years ago

A 230.-mL sample of a 0.240 M solution is left on a hot plate overnight; the following morning, the solution is 1.75 M. What vol

Gwar [14]

Answer:

The volume of water evaporated is 199mL

Explanation:

Concentration is calculated with the following formula

$C=\frac{n}{V}$

where n is the number of moles of solute and V is the volume of the solution (in this case is the same as the solvent volume) in liters.

So we isolate the variable n to know the amount of moles, using the volume given in liters

$230mL=0.23L$

$n=C*V=0.240 M*0.23L=0.055 mol$

Now, we isolate the variable V to know the new volume with the new concentration given.

$V=\frac{n}{C} =0.055mol/1.75M=0.031L=31mL$

Finally, the volume of water evaporated is the difference between initial and final volume.

$V_{ev}= V_{i} -V_{f} =230mL-31mL=199mL$

4 0

2 years ago

What is the concentration of H+ ions at a pH = 2

jolli1 [7]

Its 1.0*10^-7M its considered a concentration because hydrogen ion is exactly equal to hydroxide ions produced by dissociation of water

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2 years ago

After landing on an unfamiliar planet, a space explorer constructs a simple pendulum of length 49.0 cm . The explorer finds that

iren2701 [21]

Answer: g = 10.0 m/s/s

Explanation:

For a simple pendulum, provided that the angle between the lowest and highest point of his trajectory be small, the oscillation period is given by the following expression:

T = 2π √L/g , where L = pendulum length, g= accelleration of gravity.

We can also define the period, as the time needed to complete a full swing, so from the measured values, we can conclude the following :

T = 140 sec/ 101 cycles = 1.39 sec

Equating both definitions for T, we can solve for g, as follows:

g = 4 π² L / T² = 4π². 0.49 m / (1.39)² = 10.0 m/s/s

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2 years ago

Besides providing food and lumber, some trees are valuable natural resources because they contain substances that help make ____

kondaur [170]

Medicines would be your answer

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2 years ago

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1.Force that pulls toward the center of mass.​

1.Force that pulls toward the center of mass.