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
Shkiper50 [21]
3 years ago
6

Urgent!

Physics
1 answer:
Masja [62]3 years ago
3 0

mass of iron block given as

m_1 = 1.90 kg

density of iron block is

\rho = 7860 kg/m^3

now the volume of the iron piece is given as

V = \frac{m}{\rho}

V = \frac{1.90}{7860} = 2.42* 10^{-4} m^3

Now when this iron block is complete submerged in oil inside the beaker the buoyancy force on the iron block will be given as

F_b = \rho_L V g

here we know that

\rho_L = density of liquid = 916 kg/m^3

F_b = 916* 2.42 * 10^{-4} * 9.8

F_b = 2.17 N

Now for the reading of spring balance we can say the spring force and buoyancy force on the block will counter balance the weight of the block at equilibrium

F_s + F_b = mg

F_s + 2.17 = 1.90* 9.8

F_s = 16.45 N

So reading of spring balance will be 16.45 N

Now for other scale which will read the normal force of the surface we can write that normal force on the container will balance weight of liquid + container and buoyancy force on block

F_n = F_g + F_b

F_n = (1 + 2.50)*9.8 + 2.17

F_n = 34.3 + 2.17 = 36.47 N

So the other scale will read 36.47 N

You might be interested in
When chasing a hare along a flat stretch of ground, a greyhound leaps into the air at a speed of 10.1 m/s, at an angle of 16.9°
vesna_86 [32]

Answer:

a) The range of the leap is 5.80 m.

b) The time that the greyhound is in the air is 0.600 s

Explanation:

The position of the greyhound is given by the position vector "r":

r =(x0 + v0 · t · cos α, y0 + v0 · t · sin α + 1/2 · g · t²)

Where:

r = position vector at time "t".

x0 = initial horizontal position.

v0 = initial horizontal velocity.

y0 = initial vertical position

t = time.

α = leap angle.

g = acceleration due to gravity (-9.8 m/s² considering the upward direction as positive).

a) At the end of the leap, the position vector will be "r final" (see figure). The vector r final could be written as:

r final = (x, 0 m)

Where "x" is the range.

Then, using the equation for the vertical position we can obtain the time of flight of the leap. With that time, we can calculate the range using the equation for the horizontal position.

Then:

y = y0 + v0 · t · sin α + 1/2 · g · t²

0 m = 0 m + 10.1 m/s · t · sin 16.9° - 1/2 · 9.8 m/s² · t²

0 m = t (10.1 m/s · sin 16.9° - 4.9  m/s² · t)

0 m = 10.1 m/s · sin 16.9° - 4.9  m/s² · t

- 10.1 m/s · sin 16.9° / - 4.9  m/s²  = t

t = 0.600 s

The x-component of the vector "r final" will be:

x = x0 + v0 · t · cos α

x = 0 m + 10.1 m/s · 0.600 s · cos 16.9°

x = 5.80 m

The range of the leap is 5.80 m.

b) The time that the greyhound is in the air is 0.600 s. It was calculated above using the equation for the y-component of the vector "r final".

4 0
3 years ago
Plz help...Thanks.
Alexus [3.1K]

Answer: B) 33 amu

Explanation:

According to the table, the mass of a proton is 1.0073 amu and the mass of a neutron is 1.0087 amu.

To find the mass, we have to perform the following calculation:

<em>15 x 1.0073 + 18 x 1.0087 = 33.2661  amu</em>

<em></em>

<em>Rounding up, the approximate mass of the nucleus is 33 amu.</em>

7 0
3 years ago
A man weighing 180 lbf pushes a block weighing 100 lbf along a horizontal plane. the dynamic coefficient of friction between the
Talja [164]
The first thing you should know is that the work is defined as:
 W = F * d
 Where
 F = force
 d = displacement
 We have then
 (a) the block
 F = (0.2) * (100) = 20
 d = 100
 W = (20) * (100) = 2000 ft.lbf
 (b) the man as the system.
 F = (0.2) * (100 + 180) = 56
 d = 100
 W = (56) * (100) = 5600 ft.lbf
 answer:
 (a) 2000 ft.lbf
 (b) 5600 ft.lbf
3 0
3 years ago
A student rides a bicycle for 15 miles in 3 hours. What is the student's speed? What else would you need to know for the velocit
kaheart [24]

Answer:

5 miles per hour

Explanation:

if you divide 15 by 3 you get 5, therefore the student is going 5 miles per hour.

3 0
2 years ago
Friction always acts____ and in the ____ direction of the motion of an object ​
Fed [463]

Answer:

Friction force always acts tangent to the surface at points of contact. Friction force acts opposite to the direction of motion. There are 2 types of friction: Static friction: If the two surfaces in contact do not move relative to each other, one has static friction.

5 0
2 years ago
Other questions:
  • When the time of day for a certain ship at sea is 12 noon, the time of day at the prime meridian (0 longitude0 is 5 pm. what is
    9·1 answer
  • Which phase of matter has the MOST Kinetic Energy?
    10·2 answers
  • How to convert 45.77 cubic inches to cubic centimeters
    12·1 answer
  • Water waves in a shallow dish are 7.0 cm long. At one point, the water moves up and down at a rate of 4.0 oscillations per secon
    13·1 answer
  • A wave with a frequency of 1200 Hz propagates along a wire that is under a tension of 800 N. Its wavelength is 39.1 cm. What wil
    14·1 answer
  • What is force and matter plz answer ​
    9·2 answers
  • On Distance Displacement Position vs. Time graphs. Velocity vs. Time graphs, and Acceleration vs. Time graphs, which vanable is
    11·1 answer
  • Why will renewable technologies become cheaper, according to economists?
    11·1 answer
  • Pls give motivation, a paragraph pls! I'll give brainliest to whoever's is the biggest and best! I'll give 50 points, it is for
    13·1 answer
  • A 2.8 kg rectangular air mattress is 2.00 m long, 0.500 m wide, and
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!