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
serg [7]
3 years ago
13

This is a written question.

Physics
1 answer:
navik [9.2K]3 years ago
8 0

Answer:

2

Explanation:

it freezes from liquid to solids

You might be interested in
Give an example of nonpoint-source pollution
Ket [755]
Nonpoint source pollution is pollution that affects bodies of water, so remembering this can help in the future with this type of question. Some examples of nonpoint source pollution are; Excess fertilizers and herbicides, oil and toxic chemical runoff, as well as sediment from eroding stream banks. I hope this helps :)
8 0
3 years ago
How would you differentiate the theoretical and actual velocities of PE and KE in falling objects?
Solnce55 [7]

Answer: you've been trolled

Explanation:

8 0
3 years ago
A 0.500-kg potato is fired at an angle of 80.0° above the horizontal from a PVC pipe used as a "potato gun" and reaches a height
lions [1.4K]

Answer:

(a) 47.15ms^{-1}

(b) 2470.13ms^{-2}

(c) 1235.06N and 252.05 as a ratio

Explanation:

From Newton's second law of motion

F=ma where m is mass, a is acceleration and F is net force

Also from kinetic equation of motion, velocity and displacement are related using equation

v^{2}=u^{2}+2sa

Where v is final velocity, u is initial velocity, a is acceleration and s is displacement

From the free body diagram attached, final velocity at maximum height is 0 and initial velocity is usin80^{o}

Also, the vertical component can be written as

v_{y}^{2} }=u_{y}^{2} } -2gs The negative sign before 2gs means displacement is opposite the gravitational force

Where g is acceleration due to gravity,u_{y} is vertical component of initial velocity and v_{y} is vertical component of final velocity

Since v_{y} is 0

u_{y}^{2} } =2gs

s=110 and g is taken as 9.8

u_{y}=\sqrt{2*9.8*110}=46.43275

u_{y}=46.43ms^{-1}

Also, it's evident that the vertical component of initial velocity is u_{y}=u_{i}sin \theta where \theta is angle of projection and u_{i} is resultant velocity

Making u_{i} the subject we obtain u_{i}=\frac {u_{y}}{sin \theta}

Since u_{y} and \theta are known as 46.43ms^{-1} and 80^{o} respectively, then u_{i}=\frac {46.43ms^{-1}}{sin 80^{o}}=47.15ms^{-1}

Therefore, the velocity of potato is 47.15ms^{-1}

(b)

Displacement depends on length of tube hence s=0.450m hence going back to kinetic equation v^{2}=u^{2}+2sa

The final velocity v is answer in part a which is 47.15ms^{-1}, initial velocity u is 0ms^{-1} hence the equation is re-written as

v^{2}=2sa and making a the subject we obtain

a=\frac {v^{2}}{2s}

a=\frac {47.15^{2}}{2*0.450}=2470.13ms^{-2}

Therefore, average acceleration is 2470.13ms^{-2}

(c)

From Newton's second law of motion, F=ma where m=0.500kg and a is 2470.13ms^{-2}

Therefore, the average force of potato is

F=0.5*2470.13=1235.06N

F=1235.06N

The weight, W of potato is given by W=mg

Taking R as ratio of average force and weight of potato

R=\frac {F}{W}=\frac {F}{mg} and since F=1235.06, m=0.500kg and g=9.8

R=\frac {1235.06}{0.500*9.8}=252.05

Therefore, ratio of average force to weight is 252.05

8 0
3 years ago
Two particles, one with charge − 7.97 μC −7.97 μC and one with charge 7.75 μC, 7.75 μC, are 8.09 cm 8.09 cm apart. What is the m
mr Goodwill [35]

Answer:

Electric force, F = 84.93 N

Explanation:

Given that,

Charge on particle 1, q_1=-7.97\ \mu C=-7.97\times 10^{-6}\ C

Charge on particle 1, q_2=7.75\ \mu C=7.75\times 10^{-6}\ C

The distance between charges, d = 8.09 cm

To find,

The magnitude of the force that one particle exerts on the other.

Solution,

The electric force of attraction or repulsion is given by the formula as:

F=\dfrac{kq_1q_2}{d^2}

k is the electrostatic constant

F=\dfrac{9\times 10^9\times 7.97\times 10^{-6}\times 7.75\times 10^{-6}}{(8.09\times 10^{-2})^2}

F = 84.93 N

So, the magnitude of the force that one particle exerts on the other is 84.93 N.

4 0
3 years ago
Read 2 more answers
A bowling ball of mass m = 1.1 kg is resting on a spring compressed by a distance d = 0.35 m when the spring is released. At the
riadik2000 [5.3K]

The spring constant, k, in newtons per meter is 1,955.9 N/m.

<h3>Speed of the ball after the launch</h3>

h = v²sin²θ/2g

v = √[(2gh)/sin²θ]

v = √[(2 x 9.8 x 4.4)/ (sin 39)²]

v = 14.76 m/s

<h3>Energy of the ball at top </h3>

E = K.E + P.E

E = ¹/₂m(v cosθ)²  +  mgh

E =  ¹/₂(1.1)(14.76 cos39)²  +  (1.1 x 9.8 x 4.4)

E = 119.8 J

<h3>Spring constant</h3>

E = ¹/₂kx²

k = 2E/x²

k = (2 x 119.8)/(0.35²)

k = 1,955.9 N/m

Thus, the spring constant, k, in newtons per meter is 1,955.9 N/m.

Learn more spring constant here: brainly.com/question/1968517

#SPJ1

7 0
2 years ago
Other questions:
  • Why does the frequency of a wave decrease as the wavelength increases?
    5·1 answer
  • A bicyclist is in a 50-km race. She says she had an average velocity of 35.
    14·1 answer
  • Describe the two main ways that energy travels through the Sun.
    13·1 answer
  • As microwave light travels through a liquid, it moves at a speed of 2.2 x 108 m/s. If the frequency of this light wave is 1.1 x
    9·1 answer
  • Cruise control should not be used _____.
    13·1 answer
  • A21.0-kg block is initially at rest on a horizontal surface. A horizontal force of73.0N is required to set the block in motion,
    7·1 answer
  • suppose that the earth were moved to a distance of 0.25 AU from the sun. How much stronger or weaker would the suns gravitationa
    15·1 answer
  • How much water makes up earth in percentages? thx?
    9·1 answer
  • List the three main regions of the cells in the human body. Describe the main functions of each region.
    9·1 answer
  • Why do the planets in our solar system stay in their positions?.
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!