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
qwelly [4]
3 years ago
11

I NEED ANSWER ASAP

Physics
2 answers:
umka21 [38]3 years ago
7 0

Answer:

97% will sink below the water

Explanation:

Waters density is 1 g/cm3

If an object's density is greater than 1g/cm3, it will sink. If it's less then it would float. 1-0.97 = 0.03. Only 3% of the ice would show while 97 will be under.

IgorLugansk [536]3 years ago
5 0

Answer:

About 97 percent of the ice will sink below water.

Explanation:

Let the volume that is submerged into the water is given as V1

so at equilibrium condition we can say that buoyancy force on it is balanced by weight of the block

so we have

\pho_{water} V_1 g = \rho_{ice} V g

now we have

\frac{V_1}{V} = \frac{\rho_{ice}}{\rho_{water}}

\frac{V_1}{V} = \frac{0.97}{1}

so the percentage of block that is submerged into the water is given as

volume percent submerged = 97 %

You might be interested in
The period of a sound wave is 0.002 seconds. The speed of a sound is 344 m/s. Find the frequency and wavelength of the sound wav
ankoles [38]

Answer:

I think that's the solution

5 0
3 years ago
An iron bolt of mass 51.5 g hangs from a string 33.3 cm long. The top end of the string is fixed. Without touching it, a magnet
In-s [12.5K]

Answer:

Explanation:

Let magnetic force F acts towards right and the string makes an angle of θ with the vertical in equilibrium .Let T be tension in equilibrium

T cos θ = mg

T sin  θ = F

Dividing

Tan θ  = F / mg

F = mg Tanθ

= 51.5 x 9.8 x 10⁻³ x 26 / 20.8                        Tanθ = 26 / 20.8 )

=   630.875 X 10⁻³ N            

3 0
3 years ago
A 620 kg moose is standing in the middle of a train track. A 10,000 kg train moving at 10 m/s is unable to stop and the moose en
ddd [48]

Answer:

This is an example of Inelastic colission

Explanation:

Step one:

given:

mass of moose m1 = 620 kg

mass of train m2= 10,000kg

Initial velocity of moose  u1= 0 m/s

Initial velocity of train v1 = 10m/s

combined velocity of the system is given as v

Applying the conservation of momentum equation we have

m1u1+ m2u1= (m1+m2)V

substitutting we have

620*0+10000*10= (620+10000)V

100000= 10620V

divide both sides by 10620

V = 100000/10620

V=9.41m/s

The velocity of the moose after impact is 9.41m/s

4 0
3 years ago
What is the difference between a unit and a variable?
scoundrel [369]

Answer:

A case is an experimental unit. ... Another synonym is experimental unit. A variable is a characteristic that is measured and can take on different values. In other words, something that varies between cases.

Explanation:

7 0
3 years ago
Read 2 more answers
A high-jumper, having just cleared the bar, lands on an air mattress and comes to rest. Had she landed directly on the hard grou
Hoochie [10]

Answer:

e. the air mattress exerts the same impulse, but a smaller net avg force, on the high-jumper than hard-ground.

Explanation:

This is according to the Newton's second law and energy conservation that the force exerted by the hard-ground is more than the force exerted by the mattress.

The hard ground stops the moving mass by its sudden reaction in the opposite direction of impact force whereas the mattress takes a longer time to stop the motion of same mass in a longer time leading to lesser average reaction force.

<u>Mathematical expression for the Newton's second law of motion is given as:</u>

F=\frac{dp}{dt} ............................................(1)

where:

dp = change in momentum

dt = time taken to change the momentum

We know, momentum:

p=m.v

Now, equation (1) becomes:

F=\frac{d(m.v)}{dt}

<em>∵mass is constant at speeds v << c (speed of light)</em>

\therefore F=m.\frac{dv}{dt}

and, \frac{dv}{dt} =a

where: a = acceleration

\Rightarrow F=m.a

also

F\propto \frac{1}{dt}

so, more the time, lesser the force.

<em>& </em><u><em>Impulse:</em></u>

I=F.dt

I=m.a.dt

I=m.\frac{dv}{dt}.dt

I=m.dv=dp

∵Initial velocity and final velocity(=0), of a certain mass is same irrespective of the stopping method.

So, the impulse in both the cases will be same.

4 0
3 years ago
Other questions:
  • Consider the relationship of the variables in Newton’s second law. In a drag car race, the force applied to the car is doubled b
    8·2 answers
  • What is the best inference for the height of the plant after 35 hours?
    15·1 answer
  • If your weight is 120 pounds and your mass is 54 kilograms how would those values change if you were on the moon
    5·1 answer
  • What does a step-up transformer increase?<br><br> A. power<br> B. energy<br> C. force<br> D. voltage
    14·2 answers
  • Where are the horse latitudes located?
    11·2 answers
  • What is the direction of the current flowing through the wire—left or right? The current flows to the .
    13·2 answers
  • Consider point B, the first maximum to the left of the center of the screen. Suppose that the two slits are separated by 0.2 mm,
    6·1 answer
  • A car moving with a speed of 20 m/s<br>applies brakes. What is the acceleration<br>of the car?​
    5·1 answer
  • What is least important to consider before choosing fitness activity
    10·1 answer
  • Law of conservation of mads states that:
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!