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
yarga [219]
4 years ago
13

select the correct relationship of the densities of the given substances: !●water < iron < aluminium < mercury ● Iron &

lt; water < mercury < aluminium ● water < aluminium < iron < mercury ● none of the above​. asap plz!!!
Physics
1 answer:
Yanka [14]4 years ago
6 0

Answer:

option a is correct

Explanation:

water ∠iron∠aluminium∠mercury

water density =1.0000

iron =7.487

aluminium=2.07

mercury=13.59

You might be interested in
7) T F If two forces of equal magnitude act on an object that is hinged at a pivot, the force acting farther from the pivot must
saul85 [17]

Answer:

False

Explanation:

The torque exerted by a force is given by:

\tau=Fd sin \theta

where

F is the magnitude of the force

d is the distance between the point of application of the force and the pivot

\theta is the angle between the directions of F and d

We see that the magnitude of the torque depends on 3 factors. In this problem, we have 2 forces of equal magnitude (so, equal F). Moreover, one of the forces (let's call it force 1) acts farther from the pivot than force 2, so we have

d_1 > d_2

However, this does not mean that force 1 produces a greater torque. In fact, it also depends on the angle at which the force is applied. For instance, if the first force is applied parallel to d, then we have

\theta_1 =0\\sin \theta=0

and the torque produced by this force would be zero.

So, the statement is false.

4 0
3 years ago
Ok plz help this is my entrance exam question for physics in grade 9 (yes i am moving to a new school again)
vagabundo [1.1K]

Answer:

300 W

Explanation:

We know that

P = W/t

P = mgh/t

P = 40 × 10 × 3/4

P = 10 × 10 × 3

P = 300 W

4 0
3 years ago
When a sound wave first enters the auricle, which part of the ear does it travel through on its way to the eardrum?
ddd [48]

Ear Canal.

Explanation:

Sound waves enter the auricle and travel through a narrow passageway called the ear canal, which leads to the eardrum.

5 0
2 years ago
a 282 kg bumper car moving right at 3.50 m/s collides with a 155 kg bumper car moving 1.88 m/s left. afterwards, the 282 kg car
Vaselesa [24]

The momentum of the 155 kg car afterwards is 469.7 kg m/s to the right

Explanation:

We can solve the problem by using the law of conservation of momentum: the total momentum of the system is conserved before and after the collision, so we can write:

p_i = p_f\\m_1 u_1 + m_2 u_2 = m_1 v_1 + m_2 v_2

where:

m_1 = 282 kg is the mass of the bumper car

u_1 = 3.50 m/s is the initial velocity of the bumper car (we take the right as positive direction)

v_1 = 0.800 m/s is the final velocity of the bumper car

m_2 = 155 kg is the mass of the second bumper car

u_2 = -1.88 m/s is the initial velocity of the second car (moving to the left)

v_2 is the final velocity of the second car

Solving for v_2,

v_2 = \frac{m_1 u_1+m_2 u_2 - m_1 v_1}{m_2}=\frac{(282)(3.50)+(155)(-1.88)-(282)(0.800)}{155}=3.03 m/s

where the positive sign means the direction is to the right.

And now we can find the momentum of the 155 kg afterwards, which is

p_2 = m_2 v_2 = (155)(3.03)=469.7 kg m/s (to the right)

Learn more about momentum:

brainly.com/question/7973509

brainly.com/question/6573742

brainly.com/question/2370982

brainly.com/question/9484203

#LearnwithBrainly

7 0
3 years ago
Nitroball is similar to volleyball with no more than 3 touches per side?
ankoles [38]

Answer:

True!

Explanation:

7 0
3 years ago
Other questions:
  • A packing crate with mass 80.0 kg is at rest on a horizontal, frictionless surface. At t = 0 a net horizontal force in the +x-di
    11·1 answer
  • A hockey player makes a slap shot exerting a constant force of of 25.0 on the puck for .16 seconds with the magnitude of the imp
    7·1 answer
  • High voltage power is often carried in wire bundles made up of individual strands. In your initial post to the discussion, discu
    12·1 answer
  • A magnet is useful in generating electricity because a magnetic force moves
    15·1 answer
  • Determine the magnitude of the electric field at the surface of a lead-196 nucleus, which contains 82 protons and 114 neutrons.
    10·1 answer
  • Who were the subjects in the monster study
    7·2 answers
  • D1543
    6·1 answer
  • Explain the Kepler s law of planetary motion​
    8·1 answer
  • An airplane is .68 Kilometers long. How many Millimeters long is the plane?
    13·2 answers
  • A ball of mass 3kg moving with a velocity of 4m/s
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!