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
inna [77]
3 years ago
8

If it takes 10 seconds for a car to reach its top speed of 100 miles per hour, its acceleration would be. Help please

Physics
1 answer:
hjlf3 years ago
4 0

Answer:

36000 miles/h^{2} or 0.0028 miles/s^{2}

Explanation:

Acceleration is rate of change of speed per unit time. The change in speed is given by deducting the initial speed from final speed. Assuming that the car starts from rest to a top speed of 100 miles per hour, then the change in speed is equivalent to 100-0=100 miles per hour.

Time is given in seconds and converting to hours will be 10/3600

The acceleration will then be

\frac {100*3600}{10}=36000 miles/h^{2}

Alternatively, the change in speed xould be converted to miles per second hence 100/3600 miles per second divided by 10 s then a=\frac {100}{36000}=0.0027777777777 m/s^{2} rounded off as 0.0028 miles/s^{2}

You might be interested in
Air is warmer and less dense than surrounding air at the equator because the equator receives more?
Hatshy [7]
The answer is C: Solar energy
4 0
3 years ago
Read 2 more answers
A copper rod of cross-sectional area 11.6 cm2 has one end immersed in boiling water and the other in an ice-water mixture, which
julia-pushkina [17]

Answer:

0.686 g of ice melts each second.

Solution:

As per the question:

Cross-sectional Area of the Copper Rod, A = 11.6\ cm^{2} = 11.6\times 10^{- 4}\ m^{2}

Length of the rod, L = 19.6 cm = 0.196 m

Thermal conductivity of Copper, K = 390\ W/m.^{\circ}C

Conduction of heat from the rod per second is given by:

q = \frac{KA\Delta T}{L}

where

\Delta T = 100^{\circ} - 0^{\circ} = 100^{\circ}C = temperature difference between the two ends of the rod.

Thus

q = \frac{390\times 11.6\times 10^{- 4}\times 100}{0.196} = 228.48\ J/s

Now,

To calculate the mass, M of the ice melted per sec:

M = \frac{q}{L_{w}}

where

L_{w} = Latent heat of fusion of water = 333 kJ/kg

M = \frac{228.48}{333\times 10^{3}} = 6.86\times 10^{- 4}\ kg = 0.686\ g

5 0
3 years ago
A bag of ice cubes absorbs 149,000 J of heat, which causes its temperature to increase by 5.23 degrees celsius. what is the mass
Dima020 [189]

Answer:

14.3kg

Explanation:

Given parameters:

Quantity of heat = 149000J

Change in temperature = 5.23°C

specific heat of the ice = 2000J/kg°C

Unknown:

Mass of the ice in the bag = ?

Solution:

The heat capacity of a substance is given as:

            H = m c Ф

H is the heat capacity

m is the mass

c is the specific heat

Ф is the temperature change;

  since m is the unknown, we make it the subject of the expression;

                    m = H/ mФ

                  m = \frac{149000}{2000 x 5.23}  = 14.3kg

6 0
3 years ago
What Are the type's of Tidal turbines?
Genrish500 [490]

Answer:

Types of tidal turbines

Axial turbines.

Crossflow turbines.

Flow augmented turbines.

Oscillating devices.

Venturi effect.

Tidal kite turbines.

Turbine power.

Resource assessment.

3 0
3 years ago
Read 2 more answers
Why empty tin-cans ocillating for a longer time​
Natalija [7]

Answer: When you speak into the can, your voice creates air vibrations that travel into the can, vibrate the bottom of the can, which in turn vibrates the string all the way over to the other can, in turn vibrating the other can's bottom, then the air again.

Explanation:

3 0
2 years ago
Other questions:
  • An iron nail is made up of particles. What is true about the particles?
    6·2 answers
  • if a water wave vibrates up and down 4 times each second,the distance between 2 successive crest is 5 meters, and the height fro
    13·2 answers
  • When does a nebula become a star?
    15·1 answer
  • A race car exerts 18,344 N while the car travels at an acceleration of 92.54 m/s2. What is the mass of the car? (Use the formula
    12·2 answers
  • A particle released during the fission of uranium-235 is a(n) ________
    15·1 answer
  • which of these statements best compares the processes by which energy is produced in the sun and nuclear power plants? a. atoms
    10·2 answers
  • What is the primary reason that astronomers put telescopes and other instruments above Earth's atmosphere?
    7·1 answer
  • How many miles per day can you walk at a MODERATE Intensity level and your heart rate is 170?
    9·1 answer
  • Describe an instance when the motion energy of an object changed, causing some other energy change as well.
    9·1 answer
  • A 3.8 kg ball is rolling eastward across a horizontal,
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!