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
alexira [117]
2 years ago
7

A 4-kg hammer is lifted to a height of 10 m and dropped from rest. What was the velocity (in m/s) of the hammer when it was at a

height of 4 m from the earth? O12 O5 O11 O109.5
Physics
1 answer:
ipn [44]2 years ago
4 0

Answer:

v = 10.84 m/s

Explanation:

using the equation of motion:

v^2 = (v0)^2 + 2×a(r - r0)

<em>due to the hammer starting from rest, vo = 0 m/s and a = g , g is the gravitational acceleration.</em>

v^2 = 2×g(r - r0)

v = \sqrt{2×(-9.8)×(4 - 10)}

  = 10.84 m/s

therefore, the velocity at r = 4 meters is 10.84 m/s

You might be interested in
Can any kind soul help me please​
Alex

Answer:

I) 420000J

ii)

Explanation:

(I) so you can use the formula for quantity of heat then substitute the values given

formula-Q=mc∆9

3 0
2 years ago
Light could be thought of as a stream of tiny particles discharged by _______ objects that travel in straight paths. *
Gelneren [198K]

Answer: Light could be thought of as a stream of tiny particles discharged by luminous objects that travel in straight paths.

Explanation:

We can define "radiation" as the transmision of energy trough waves or particles.

Particularly, light is a form of electromagnetic radiation, so the "tiny particles" of light are discharged by a radiating object, particularly we can be more explicit and call it a luminous object, in this way we are being specific about the nature of the radiation of the object.

5 0
3 years ago
How do hydrogen and oxygen atoms form covalent bonds to create water? A: Oxygen gives its electrons to hydrogen. B: Hydrogen giv
Dvinal [7]

C) Oxygen and hydrogen share electrons with each other.

4 0
3 years ago
Read 2 more answers
Rolled cookies are cut into fancy shapes.<br><br> True<br> False
Paha777 [63]

Answer:

false

Explanation:

the answer is false

5 0
2 years ago
Read 2 more answers
1. a 0. 338-g sample of antimony was completely reacted with 0. 295 g of chlorine gas to form antimony chloride. determine the e
vovangra [49]

The empirical formula of the antimony chloride is SbCl_{3}.

<h3>How to determine the empirical formula?</h3>

Chemical formulas for compounds that simply specify the proportions of the elements they contain rather than the exact number or arrangement of atoms are known as empirical formulas. The element in the compound with the lowest whole number ratio would be this one.

Data obtained from the question

Antimony (Sb) = 0.338 g

Chlorine (Cl) = 0.295 g

Divide by their molar mass.

Sb = 0.338 / 122 = 0.0028

Cl = 0.295 / 35.5 = 0.0083

Divide by the smallest.

Sb = 0.0028 / 0.0028 = 1

Cl = 0.0083 / 0.0028 = 3

Thus, the empirical formula of the compound is SbCl₃.

To know more about empirical formulas visit:
brainly.com/question/14044066

#SPJ4

5 0
1 year ago
Other questions:
  • A spring stores 10. joules of elastic potential
    11·2 answers
  • PLEASE ANSWER QUESTION 25! NOT 24. Brainliest and 25 points!
    8·2 answers
  • A) On which hemisphere does Bhutan lie on the earth?​
    13·1 answer
  • You pull with a force of 77 N on a piece of luggage of mass 23 kg, but it does
    12·2 answers
  • does the amount of work to required to move a charge in an electric field depend on the path taken or just the potential differe
    7·1 answer
  • Which components of the atom has a positive charge
    10·2 answers
  • Complete the simulation for three different trails. Complete chart below, using the data for your simulation from each trail.
    9·2 answers
  • What is The force of gravity between the Aeneas and earth
    13·1 answer
  • As a child walks, for a brief moment his entire weight is placed on one heel, which can be approximated as a small circle. Calcu
    14·1 answer
  • draw the process and control scheme for this system if a constraint controller is used, such that when the smaller of two parall
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!