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
IrinaK [193]
3 years ago
6

1. Suppose you have a metal bar. Its mass is 57.9g and its volume is 3cm'. What is its density?

Physics
1 answer:
mariarad [96]3 years ago
3 0

¡Hellow!

How we know, for calculate density, we can use the formule:

                                               \boxed{\textbf{p = m / v} }

<u>Where:</u>

\sqrt{ p = Density = ?

\sqrt{ m = Mass = 57,9 g

\sqrt{ v = Volume = 3 cm³

Let's replace according we information:

p = 57,9 g / 3 cm³

p = 19,3 g/cm³

The density of the metal bar is <u>19,3 g/cm³.</u>

<u></u>

¿Good luck?

You might be interested in
The heater element of a 120 V toaster is a 5.4 m length of nichrome wire, whose diameter is 0.48 mm. The resistivity of nichrome
Ksenya-84 [330]

Answer:

The power drawn by the toaster is closest to:

(A) 370 W

Explanation:

First we calculate the resistance of the nichrome wire (R).

R=\frac{pL}{A} =\frac{pL}{\pi r^{2} } \\

Where radious (r), resistance coefficient (p), and Length (L)

r=\frac{0.48}{2} 10^{-3} m\\\\L=5.4 m\\p=1.3*10^{-3}\varOmega  \\\\\\Replacing:\\\\R=\frac{1.3(10)^{-6} *5.4}{\pi* 0.24^{2} (10)^{-6}} =38.7940

After replace the value in the ohm law power formula to obtain the power consumed:

P=\frac{V^2}{R} =\frac{120^2}{38.7940} =371.191 Watts

7 0
3 years ago
Two 1.0 kg masses are 4.0 m apart on a frictionless table. Each has 1.0μC of charge. Part A What is the magnitude of the electri
9966 [12]

Force between two charges is given by

F =\frac{kq_1q_2}{r^2}

F =\frac{9*10^9* 1* 10^{-6}* 1 * 10^{-6}}{4^2}

F = 5.625 * 10^{-4} N

Now in order to find the acceleration of each mass

we can use

F = ma

5.625 * 10^{-4} = 1 * a

a= 5.625 * 10^{-4} m/s^2

8 0
3 years ago
Read 2 more answers
Please help, no links please! I dont understand stand this question and im going to cry
Vaselesa [24]

Answer:

I'm pretty sure its helium

3 0
3 years ago
Read 2 more answers
Two identical tiny spheres of mass m =2g and charge q hang from a non-conducting strings, each of length L = 10cm. At equilibriu
Citrus2011 [14]

Answer:

0.247 μC

Explanation:

As both sphere will be at the same level at wquilibrium, the direction of the electric force will be on the x axis. As you can see in the picture below, the x component of the tension of the string of any of the spheres should be equal to the electric force of repulsion. And its y component will be equal to the weight of one sphere. We can use trigonometry to find the components of the tensions:

F_y:  T_y - W = 0\\T_y = m*g = 0.002 kg *9.81m/s^2 = 0.01962 N

T_y = T_*cos(50)\\T = \frac{T_y}{cos(50)} = 0.0305 N

T_x = T*sin(50) = 0.0234 N

The electric force is given by the expression:

F = k*\frac{q_1*q_2}{r^2}

In equilibrium, the distance between the spheres will be equal to 2 times the length of the string times sin(50):

r = 2*L*sin(50) = 2 * 0.1m * sin(50) 0.1532 m

And k is the coulomb constan equal to 9 *10^9 N*m^2/C^2. q1 y q2 is the charge of each particle, in this case, they are equal.

F_x = T_x - F_e = 0\\T_x = F_e = k*\frac{q^2}{r^2}

q = \sqrt{T_x *\frac{r^2}{k}} = \sqrt{0.0234 N * \frac{(0.1532m)^2}{9*10^9 N*m^2/C^2} } = 2.4704 * 10^-7 C

O 0.247 μC

8 0
3 years ago
before dancing on a smooth wooden floor, ballet dancers sometimes sometimes put a sticky powered called rosin on their shoes sol
Katena32 [7]

Okay, so they want to basically Increase their grip, and they are taking advantage of the force of friction

3 0
2 years ago
Other questions:
  • How much energy is used by a 900 w microwave that operates for 4 minutes ?
    6·1 answer
  • How does friction apply a force to a moving object?
    11·1 answer
  • Why have fungi evolved mechanisms for dispersal of their spores
    8·1 answer
  • the form of energy that is stored in large objects because of its internal condition, such as compression or tension, is called
    5·1 answer
  • When 0.250 moles of licl are added to 200.0g of water in a constant pressure?
    12·1 answer
  • Which element would have properties most similar to those of fluorine (F) ?
    11·2 answers
  • You are standing on the ground, watching a bird fly away horizontally at a rate of 9 meters per second. The bird is initially lo
    11·1 answer
  • Correct displacement 4km south,2 km north, 5km south, and 5 km north
    10·1 answer
  • Urgent help needed with Physics
    5·1 answer
  • A man walks 6 km north, then turns and walks 6 km east what is the resultant and angle
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!