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
IceJOKER [234]
3 years ago
13

A ball is thrown upward at 4 meters per second starting from ground level. How long does it take for the ball to return to the g

round?
Physics
1 answer:
nata0808 [166]3 years ago
6 0

Answer:

it takes 2 min to return

Explanation:

You might be interested in
Three-fourths of the elements on the
77julia77 [94]

Answer:

b

Explanation:

because the metalloids are the thing in the middle

8 0
3 years ago
Suppose your surface body temperature averaged 90 degrees F. How much radiant energy in W/m^2 would be emitted from your body?
Debora [2.8K]

493 \; \text{W}\cdot \text{m}^{-2}.

<h3>Explanation</h3>

The Stefan-Boltzmann Law gives the energy radiation <em>per unit area</em> of a black body:

\dfrac{P}{A} = \sigma \cdot T^{4}

where,

  • P the total power emitted,
  • A the surface area of the body,
  • \sigma the Stefan-Boltzmann Constant, and
  • T the temperature of the body in degrees Kelvins.

\sigma = 5.67 \times 10^{-8} \;\text{W}\cdot \text{m}^{-2} \cdot \text{K}^{-4}.

T = 90 \; \textdegree{}\text{F} = (\dfrac{5}{9} \cdot (90-32) + 273.15) \; \text{K} = 305.372 \; \text{K}.

\dfrac{P}{A} = \sigma \cdot T^{4} = 5.67 \times 10^{-8} \times 305.372^{4} = 493\; \text{W}\cdot \text{m}^{-2}.

Keep as many significant figures in T as possible. The error will be large when T is raised to the power of four. Also, the real value will be much smaller than 493\; \text{W}\cdot \text{m}^{-2} since the emittance of a human body is much smaller than assumed.

5 0
3 years ago
The acceleration of a block attached to a spring is given by a=−(0.324m/s2)cos([2.50rad/s]t) a = − ( 0.324 m / s 2 ) c o s ( [ 2
allsm [11]

Answer:

Looks like you have:

a = -.324 cos 2.5 t

In this case   ω^2 A = .324

ω = 2.5

f = ω / (2 * pi) = 2.5 / 6.28 = .40 / sec

5 0
2 years ago
Which statement best explains the relationship between the electric force between two charged objects and the distance between t
Thepotemich [5.8K]

Answer: a

Explanation:

8 0
3 years ago
Magnectic striping is evidence of ?
wolverine [178]

Answer: Magnetizim

Explanation: Magnetic Atoms collide creating magnetizim

5 0
3 years ago
Other questions:
  • Using the information from Paul Hewitt's Conceptual Development Practice Page 25-1 and the image below, answer the following que
    14·1 answer
  • If you wanted to learn more about ancient scientific knowledge, whose life<br> would you research?
    11·2 answers
  • What voltage must be applied to an 6 nF capacitor to store 0.14 mC of charge? Give answer in terms of kV.
    13·1 answer
  • Required information Problem 16.048 - DEPENDENT MULTI-PART PROBLEM - ASSIGN ALL PARTS NOTE: This is a multi-part question. Once
    10·1 answer
  • What are the effects of overpopulation on a specific species in an ecosystem?
    6·2 answers
  • How many neutrons are contained in 2 kg? Mass of one neutron is 1.67x10-27 kg.
    5·1 answer
  • Please help me with this Physics question?
    12·1 answer
  • You have 750 g of water at 10°C in a large insulated beaker. How much boiling water at 100°C must you add to this beaker so that
    7·1 answer
  • A high increase his speed from 3.2 m/ s to 5.6m/s during in interval. What is his acceleration that time
    9·1 answer
  • Can someone help please
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!