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
Jobisdone [24]
3 years ago
6

A ball is thrown upward at a velocity of 19.6 m/s. What is its velocity after 3.0, assuming negligible air resistance?

Physics
2 answers:
Bess [88]3 years ago
5 0
If the ball travels 19.6 meters every second and it travels for 3 seconds, obviously you have to multiply the velocity by 3:

19.6 x 3= 58.8m/s
MrRa [10]3 years ago
5 0

Answer:

After 3 seconds the velocity becomes 49 m/s

Explanation:

Applying upward displacement equation:

Y = V_yt +\frac{1}{2}gt^2

differentiate this equation,

\frac{dy}{dt} = V_y + gt

where; dy/dt is the velocity function;

After 3 seconds, the velocity becomes;

V = 19.6 + (9.8)(3)

V = 19.6 + 29.4

V = 49 m/s

Therefore, after 3 seconds the velocity becomes 49 m/s

You might be interested in
What is specific heat capacity
finlep [7]

It is the heat required to raise the temperature of the unit mass of a given substance by a given amount (usually one degree).

3 0
3 years ago
Can someone help me?!!!!!
ladessa [460]

Answer:

magnitude: 21.6; direction: 33.7 degrees

Explanation:

When we multiply a vector by a scalar, we have to multiply each component of the vector by the scalar number. In this case, we have

vector: (-3,-2)

Scalar: -6

so the vector multiplied by the scalar will have components

(-3\cdot (-6), -2 \cdot (-6))=(18,12)

The magnitude is given by Pythagorean's theorem:

m=\sqrt{18^2+12^2}=21.6

and the direction is given by the arctan of the ratio between the y-component and the x-component:

\theta = tan^{-1} (\frac{12}{18})=33.7^{\circ}

3 0
3 years ago
A student wants to make an analogy to help her remember the characteristics of the planets. Which analogy makes the most sense?
Gala2k [10]

Answer:

The last one makes the most sense as they combine two like things that are easy to visualize

Explanation:

3 0
3 years ago
Read 2 more answers
2 resistors of resistance 1000 ohm and 2000 ohm are joined in series with a 100V supply. A voltmeter of internal resistance 4000
Vadim26 [7]
<h2>The voltmeter reading will be 35.7 volt </h2>

Explanation:

The resistor 1000 ohm and 4000 ohm are connected in parallel .

Their combined resistance is supposed R₁

Thus \frac{1}{R_1} = \frac{1}{1000} + \frac{1}{4000}  

or R₁ = 800 ohm

Therefore the total resistance in circuit is = 2000 + 800 = 2800 ohm

Because these are in series .

We can find  current flowing through the circuit  I = \frac{V}{R} = \frac{100}{2800} = \frac{1}{28}

here R is total resistance .

The potential difference across 1000 ohm = \frac{1}{28} x 1000 = 35.7 volt

Thus voltmeter reading will be 35.7 volt

5 0
3 years ago
A thick steel sheet of area 100 in.2 is exposed to air near the ocean. After a one-year period it was found to experience a weig
vladimir1956 [14]

Answer:

Therefore the rate of corrosion 37.4 mpy and 0.952 mm/yr.

Explanation:

The corrosion rate is the rate of material remove.The formula for calculating CPR or corrosion penetration rate is

CPR=\frac{KW}{DAT}

K= constant depends on the system of units used.

W= weight =485 g

D= density =7.9 g/cm³

A = exposed specimen area =100 in² =6.452 cm²

K=534 to give CPR in mpy

K=87.6  to give CPR in mm/yr

mpy

CPR=\frac{KW}{DAT}

        =\frac{534\times( 485g)\times( 10^3mg/g)}{(7.9g/cm^3) \times (100in^2)\times (24h/day)\times (365day/yr)\times 1yr}

        =37.4mpy

mm/yr

CPR=\frac{KW}{DAT}

        =\frac{87.6\times (485g)\times (10^3 mg/g)}{(7.9g/cm^3)\times (100in^2)\times(2.54cm/in)^2\times (24h/day)\times (365day/yr)\times 1yr}

       =0.952 mm/yr

Therefore the rate of corrosion 37.4 mpy and 0.952 mm/yr.

3 0
3 years ago
Other questions:
  • Which best describes how energy changes form in a car's engine?
    5·2 answers
  • (a) Determine the required delta-v, Ave, to the nearest m/s, to reach a circular 500 km altitude equatorial prograde (eastward)
    5·1 answer
  • A piece of plastic has a net charge of +9.9 μC. How many more protons than electrons does this piece of plastic have? (e = 1.60
    10·1 answer
  • If a 2-kg ball is thrown through the air at 20 m/s what is the momentum of the ball?
    14·1 answer
  • Which of the following statements are true with respect to the law of conservation of mass?
    15·1 answer
  • Which of the following is described here? "Point your skis straight down the fall line with your skis parallel and about a foot
    13·2 answers
  • How you can change the state of matter of the substance in the container.
    8·2 answers
  • What force is required to accelerate a 1840 kg car from 4.77 m/s to 23.5 m/s,
    9·1 answer
  • The half-life of Cs-137 is 30.2 years. If the initial mass of the sample is 1.00 kg, how much will remain after 151 years?
    13·2 answers
  • ANSWERRR PLEASEEEE!!!
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!