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
serious [3.7K]
2 years ago
6

HELP PLZ

Physics
1 answer:
Stells [14]2 years ago
5 0

Answer:

Explanation:

Use the equation

h(t)=-16t^2+v_0t+h_0

where h(t) is the height after a certain amount of time goes by, v0t is the initial upwards velocity, and h0 is the initial height of the projectile. For us:

h(t) = 10

v0t = 80

h0 = 3 and filling in:

10=-16t^2+80t+3 and get everything on one side to factor:

0=-16t^2+80t-7

This factors to

t = .09 sec and 4.9 sec. Let's interpret this.

The time of .09 is when the ball reached 10 feet on the way up, and

the time of 4.9 is when the ball reached 10 feet on the way back down. That's the height we need, 4.9 seconds.

You might be interested in
How is p dv a valid integral (it’s an isochoric process) if the variables by definition have to be the same?
denis23 [38]

Answer:

potang ina bubu ka

Explanation:

pota ka bubu ampota

4 0
2 years ago
Help me please, it's so hard
fomenos

Answer:

4.58×10²³ atoms

5.94×10⁻²¹ J

1340 m/s

Explanation:

Use ideal gas law to find moles of gas.

PV = nRT

(1.266 atm × 101300 Pa/atm) (4/3 π (0.15 m)³) = n (8.31451 J/mol/K) (14 + 273) K

n = 0.760 mol

Use Avogadro's number to find number of atoms.

(0.760 mol) (6.02214×10²³ atom/mol) = 4.58×10²³ atoms

Average kinetic energy per molecule is:

KE = 3/2 kT

KE = 3/2 (1.38066×10⁻²³ J/K) (14 + 273) K

KE = 5.94×10⁻²¹ J

RMS speed of each atom is:

KE = 1/2 mv²

5.94×10⁻²¹ J/atom = 1/2 (0.004 kg/mol) (1 mol / 6.02214×10²³ atom) v²

v = 1340 m/s

8 0
3 years ago
Read 2 more answers
Identify one force acting on the cart.
Artist 52 [7]

Answer:

pulling force

Explanation:

because the person is pulling that cart.

5 0
3 years ago
When you mix two gases what can you predict about the conservation of volume in this case?
o-na [289]
Amagat's law of additive volumes states that we can simply add up the individual volumes of each gas (provided they are at the same temperature and pressure) to get the total volume of the mixture. Conservation of volume is an acceptable assumption for gases (but not always for liquid mixtures). This works for gases since the molecules are very small and only take up a minimal amount of space in a gas.
3 0
3 years ago
Compare the characteristics of 4d orbitals and 3d orbitals and compared the following sentences. Check all that apply
charle [14.2K]

Answer :

<em>(b) 4d orbitals would be larger in size than 3d orbitals</em>

<em>(e) 4d orbitals would have more nodes than 3d orbitals</em>

Explanation :

As we move away from one orbital to another, the distance between nucleus and orbital increases. So, 4d orbitals would be far to the nucleus than 3d orbitals.

Hence, 4d orbitals would be larger in size than 3d orbitals.

Number of nodes is any orbital is n - 1 where, n is principal quantum number.

So, number of orbital in 4d is 3.

And number of orbital in 3d is 2.

So, options (b) and (e) are correct.

8 0
3 years ago
Other questions:
  • Exactly one pound of bread dough is placed in a baking tin. The dough is cooked in an oven at 350°F, releasing a wonderful aroma
    15·1 answer
  • I need help with 6a, 6b, and 6c !!
    8·1 answer
  • A conical container of radius 6 ft and height 18 ft is filled to a height of 11 ft of a liquid weighing 64.4 lb divided by ft cu
    15·1 answer
  • Is it true the atoms in sulphur liquid are the same as the atoms in solid sulphur?
    7·1 answer
  • The Netherlands controlled ______ for centuries <br><br> A. Vietnam<br> B. Malaysia<br> C. Indonesia
    16·2 answers
  • The Sun is a significant factor that helps to support life. Which of the following Earth-Sun relationships is not true?
    7·2 answers
  • If the unbalanced force is -20.0 N and the mass of the object is 3.75 kg, what is the acceleration of the the object while this
    13·1 answer
  • What is the definition of zenith, altitude, horizon, circompolar stars, astrolabe, and doppler effect in astronomy?
    13·1 answer
  • Eifhewfiowehfoiwehfoiwe
    12·1 answer
  • A girl runs once around a circular track with a radius of 100m at speed of 10m/s.
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!