1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
sergeinik [125]
3 years ago
5

Severus Snape knows that density of his powder is 3.00 g/cm3 . He also knows he needs 3.00 cm3 of this powder. What mass in gram

s does he require?
Physics
1 answer:
harina [27]3 years ago
8 0

Answer:

He requires 1 gram of mass.

Explanation:

The density is defined as:

\rho = \frac{m}{V}  (1)

Where m is the mass and V is the volume.

Then, m can be isolated from equation 1 in order to determine the mass.

m = \rho \cdot V (2)

m = (3.00g/cm^{3})(3.00cm^{3})  

m = 1g  

Hence, he requires 1 gram of mass.

You might be interested in
Which sound wave features are being described?
Andre45 [30]

Answer: Sound wave can be described by five characteristics Wavelength , amplitude, time period, frequency and velocity or speed

Explanation:

6 0
3 years ago
Read 2 more answers
A boy sledding down a hill accelerates at 1.40 m/s². If
mrs_skeptik [129]

Answer: He would reach 7m/s at the distance of 17,5m.

Explanation: In order for us to know how long it takes for the speed to be reached, we use the equation V= Vo + at, with V=7m/s, Vo= 0m/s since you start from rest and a=1.4m/s². T is the time in seconds that we want to find out.

7 = 0 + 1.4t

7 = 1.4t

t= 5s

Now, we want to know the distance this boy reaches in 5 seconds, in a 7m/s speed and accelarating in 1.4m/s². For finding this out, we use another equation, S = So + Vot + (at²)/2, S being the final distance, So = 0m because he started from rest, and the other variables used before.

S = 0 + 0*5 + [1.4*(5²)]/2

S = 0 + 0 + (1.4*25)/2

S = 35/2

S = 17,5m

5 0
3 years ago
You are on the roof of the physics building, 46.0 above the ground . Your physics professor, who is 1.80 tall, is walking alongs
nekit [7.7K]

There is one mistake in the question as unit of height of building is not given.So I assume it as meter.The complete question is here

You are on the roof of the physics building, 46.0 m above the ground. Your physics professor, who is 1.80 m tall, is walking alongside the building at a constant speed of 1.20 m/s. If you wish to drop an egg on your professor’s head, where should the professor be when you release the egg? Assume that the egg is in free fall.  

Answer:

d=3.67 m

Explanation:

Height of building=46.0 m

First we need to find time taken by egg to reach 1.80 m above the surface

So to find time use below equation

S=vt+\frac{1}{2} gt^{2}\\ (46.0-1.80)m=(om/s)t+\frac{1}{2}(9.8m/s^{2} )t^{2}\\t=\sqrt{\frac{(46.0-1.80)m}{4.9} }\\ t=3.06s

As velocity 1.20m/s is given and we have find time.So we can easily find the distance

So

distance=velocity*time\\d=v*t\\d=(1.20m/s)*(3.06s)\\d=3.67m

3 0
3 years ago
A cyclist, while overtaking another bike, increases his speed uniformly from 4.2 mis to 6.3 m/s over a time interval of 5.3 s. H
avanturin [10]

Answer:

27.82m

Explanation:

The distance of the cyclist can be calculated using the formula:

S = ut + 1/2 (at^2)

Where; S = distance

u = initial velocity

a = acceleration

t = time

However, to find acceleration, we use:

a = v - u/t, where v is the final velocity

According to this question, u = 4.2m/s, v = 6.3m/s, t = 5.3s

a = 6.3 - 4.2 / 5.3

a = 2.1/5.3

a = 0.396m/s^2

Hence, using S = ut + 1/2 (at^2)

S = (4.2 × 5.3) + 1/2 (0.396 × 5.3 × 5.3)

S = 22.26 + 5.56

S = 27.82

Therefore, the cyclist travel in 27.82m

8 0
3 years ago
Cotton is lighter than iron .why?
timofeeve [1]

Cotton is significantly less dense than iron. Therefore if you have equal volume samples of cotton and iron, the iron sample will weigh more than the cotton sample.

A substance's relative density is the ratio of its density to that of liquid water. You are taking two quantities with the same unit and dividing them. This will cancel out the unit on the top and bottom, leaving you with a number that has no unit.

Inflating a balloon puts it under an awful lot of pressure. The material must remain pretty durable throughout in order to sustain that much stress. Any weak spots inside the balloon will eventually give way; the balloon will then rip and pop.

3 0
3 years ago
Other questions:
  • Is a mountain lion a consumer producer or decomposer
    6·2 answers
  • Write a simple definition for an isotope
    15·1 answer
  • For number 1 I'm really confused
    6·2 answers
  • A measurement must include both a number and a(an)
    5·1 answer
  • Consider the following neutral electron configurations in which n has a constant value. Which configuration would belong to the
    9·2 answers
  • Alice and Marge are studying the properties of matter. The girls placed some an iron nail in a beaker containing water. Iron is
    11·1 answer
  • Alice suffered a minor electrical shock as she switched on her bathroom light. She is concerned and wants to prevent it from hap
    6·2 answers
  • Which of the following best describes chemical weathering?
    10·2 answers
  • Plz answer this now anyone plz
    6·1 answer
  • If a car has a mass of 200 kilograms and produces a force of 500 N, how fast will the car accelerate?
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!