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3 years ago

Which substance is a combination of different atoms?

Physics

2 answers:

grigory [225]3 years ago

8 0

Answer:

B. Heterogeneous mixture

Aleks04 [339]3 years ago

8 0

Answer:

It wasn't a heterogeneous mixture, it's compound

Explanation:

I got it wrong on the test when I chose heterogeneous mixture

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Which two things determine an object’s momentum?

son4ous [18]

Momentum (in terms of classical mechanics) is defined as p = m*v, where m is the mass and v is the velocity.

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3 years ago

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What is the weight of a 7.0 kilogram bowling ball on the surface of the moon

Artist 52 [7]

The acceleration on surface of moon =1.67m/s^2

Weight =mass ×acceleration
=7×1.67
=11.69N

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3 years ago

PLZ HELP ME 50 POINTS AND BRAINLEIST TO FIRST PERSON Give an example of the strong surface tension exhibited by water

Salsk061 [2.6K]

Answer:

Water striders have strong intermolecular forces on their legs which enables them to run on water.

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3 years ago

A grasshopper hops along a level road. on each hop, the grasshopper launches itself itself at an angle of 45 degrees. and achiev

Harman [31]

Answer: 1.9 m/s

Explanation:

1) Data:

height, y = 0

range, x = 0.77m

angle, α = 45°

question, horizontal velocity, Vox = ?

2) Physical principles and formulas

Projectile motion.

$y=V_{0y}t-gt^{2} /2\\ \\ x=V_{0x}t\\ \\ V_{0y}=V_0sin\alpha \\ \\ V_{0x}=V_0cos\alpha$

3) Solution

$0.77=V_0cos(45)t\\ t=0.77/(V_0cos(45))$

$y=0=V_0sin(45)t-gt^{2} /2$

Factor

$0=t[V_0sin(45)-gt/2]$

Discard t = 0 and solve for the other factor:

$gt/2=V_0sin(45)\\ \\ V_0= gt/(2sin(45))=9.81[0.77/V_{0}cos(45)]/[2sin(45)]\\ \\ V_0^2=9.81[0.77/(2cos(45)sin(45)=9.81[0.77/sin(90)]=7.55\\ \\ V_0}=\sqrt{7.55} =2.8$

Find Vx:

$Vx=V_{0x}=V_{0}cos(45)=2.75(\sqrt{2} /2]=1.9$

Vx = 1.9m/s ← answer

4 0

3 years ago

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3. When 10^14 electrons are removed from a neutral metal sphere, the charge on the sphere

Umnica [9.8K]

Answer:

Β. 16 με

Explanation:

Data provided in the question

Number of electrons removed = 10^14

And, the charge on one electron = $1.6\times 10^ {-19C}$

Based on the above information, the charged on the sphere is

Therefore when we remove the electrons

So, the equation would be

$10^{14} \times 1.6 \times 10^{-19 C}$

= $1.6 \times 10$

Therefore the same amount of the positive charged would be developed

Hence, the correct option is B.

4 0

3 years ago