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
balu736 [363]
3 years ago
12

A sphere has a radius of 3.9cm and a density of 7.58 g/cm cubed. What is the mass?

Physics
1 answer:
snow_lady [41]3 years ago
3 0

Answer:

m=ρV

V=4/3 * pi * r3

V=1.3 * 3.14 * 3.9^3

V=242.14 cm^3

m=7.58 * 242.14

m=1.8 kG

Explanation:

1. We calculate volume for sphere.

2. Then we calculate mass of sphere.

You might be interested in
In a lightning bolt, a large amount of charge flows during a time of 1.2 x 10-3 s. Assume that the bolt can be represented as a
ohaa [14]

Answer: 10.58 C has flowed during the lightning bolt

Explanation:

Given that;

Time of flow t = 1.2 × 10⁻³

perpendicular distance r = 21 m

Magnetic field B = 8.4 x 10⁻⁵ T

Now lets consider the expression for magnetic field;

B = u₀I / 2πr

the current flow is;

I = ( B × 2πr ) / u₀

so we substitute

I = ( (8.4 x 10⁻⁵) × 2 × 3.14 × 21 ) / 4π ×10⁻⁷

=  0.01107792 / 0.000001256

= 8820 A

Hence the charge flows during lightning bolt  will be;

q = It

so we substitute

q = 8820 × 1.2 × 10⁻³

q = 10.58 C

therefore 10.58 C has flowed during the lightning bolt

6 0
3 years ago
4. On the way to the castle, Shrek and Donkey have to walk on a rickety bridge<br>over​
salantis [7]
Over lava!
I’m pretty sure that’s the answer cuz I haven’t seen the movie in a hot minute!

-YOUR WELCOME!! <3
8 0
3 years ago
Read 2 more answers
How long will it take you to ride your bike 120 miles if you are riding at 5mph?
lana66690 [7]
If i'm wrong sorry but i think it is 24hrs
4 0
2 years ago
Read 2 more answers
Two piano strings produce beats. Frequencies of the strings are 1560 Hz. and 1563 Hz. Choose the correct frequency of the beats.
kakasveta [241]

Beat frequency is given by the difference of two frequencies played together

f_{beat} = |f_1 - f_2|

given that

f_1 = 1560 Hz

f_2 = 1563 Hz

Now

f_{beat} = |1560- 1563| Hz

f_{beat} = 3 Hz

3 0
3 years ago
Read 2 more answers
A Christmas sphere will break if dropped on hardwood floor with a velocity of 2.0 m/s. Mar Estefanía is
Margaret [11]

Answer:

0.17 s

Explanation:

Given:

Δy = 0.15 m

v₀ = 0 m/s

a = 9.8 m/s²

Find: t

Δy = v₀ t + ½ at²

0.15 m = (0 m/s) t + ½ (9.8 m/s²) t²

t = 0.17 s

8 0
3 years ago
Other questions:
  • You raise a bucket of water from the bottom of a deep well. if your power output is 138 w , and the mass of the bucket and the w
    5·1 answer
  • If you speed up from rest to 12m/s in 3 seconds, what is your acceleration?
    9·2 answers
  • How can working together help scientist achieve their goals?
    5·1 answer
  • Regions in the milky way where density waves have caused gas clouds to crash into each other are called
    14·1 answer
  • True or False: If your gas pedal jams, you should turn the key to lock to lock the steering wheel.
    8·2 answers
  • A compound is found to have a molar mass of 598 g/mol. if 0.0358 g of the compound is dissolved in enough water to make 175 ml o
    9·1 answer
  • d. The force is doubled and the object’s mass is halved? 18. ||| A man pulling an empty wagon causes it to accelerate at 1.4 m/s
    11·1 answer
  • A runner runs 2.0 km in 5.0 minutes
    10·2 answers
  • Your car rolls slowly in a parking lot and bangs into the metal base of a light pole. In terms of safety, is it better for your
    9·1 answer
  • Which molecules from food and air ends up with the cell in the body
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!