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
Ksju [112]
3 years ago
7

If in 30 mins Alex runs to a store that is 4 km away, what is her average speed in km/h

Physics
1 answer:
masha68 [24]3 years ago
6 0
15 km 30 divided by 4 is 7.5 km in 30 min times that by 2 the answer is 15
You might be interested in
Relation between wavelength wave velocity and time period
Snezhnost [94]

Answer: wavelength=velocity×period

Explanation:the relation between velocity, wavelength and period is

Wavelength=velocity×period

8 0
3 years ago
If the merry-go-round makes one revolution in 10 seconds, what is the child’s linear speed?
Anton [14]
The child's linear speed is
              
    <em> (pi / 5) x (the child's distance from the center of the ride, in feet)</em>

                                                                                        feet per second.
5 0
3 years ago
How much heat (in calories) are needed to raise the temperature of 60 g of water
laila [671]

Answer:

Well, each ml of water requires one calorie to go up 1 degree Celsius, so this liter of water takes 1000 calories to go up 1 degree Celsius.

Explanation:

3 0
2 years ago
What does compressed mean?
jeka57 [31]

Answer:

flattened by pressure; squeezed or pressed together.

Explanation:

7 0
3 years ago
Read 2 more answers
A chevrolet corvette convertible can brake to a stop from a speed of 60.0 mi/h in a distance of 123 ft on a level roadway. what
pychu [463]
By definition we have that the final speed is:
 Vf² = Vo² + 2 * a * d
 Where,
 Vo: Final speed
 a: acceleration
 d: distance.
 We cleared this expression the acceleration:
 a = (Vf²-Vo²) / (2 * d)
 Substituting the values:
 a = ((0) ^ 2- (60) ^ 2) / ((2) * (123) * (1/5280))
 a = -77268 mi / h ^ 2
 its stopping distance on a roadway sloping downward at an angle of 17.0 ° is:
 First you must make a free body diagram and see the acceleration of the car:
 g = 32.2 feet / sec ^ 2
 a = -77268 (mi / h ^ 2) * (5280/1) (feet / mi) * (1/3600) ^ 2 (h / s) ^ 2
 a = -31.48 feet / sec ^ 2
 A = a + g * sin (θ) = -31.48 + 32.2 * sin17.0
 A = -22.07 feet / sec ^ 2
 Clearing the braking distance:
 Vf² = Vo² + 2 * a * d
 d = (Vf²-Vo²) / (2 * a)
 Substituting the values:
 d = ((0) ^ 2- (60 * (5280/3600)) ^ 2) / (2 * (- 22.07))
 d = 175.44 feet
 answer:
 its stopping distance on a roadway sloping downward at an angle of 17.0 ° is 175.44 feet
5 0
3 years ago
Read 2 more answers
Other questions:
  • Michael is the captain of his school’s soccer team. What skill does Michael exhibit when he decides which player will take the p
    12·1 answer
  • Consider two mass-less springs connected in series. Spring 1 has a spring constant k₁, and spring 2 has a spring constant k₂. A
    6·1 answer
  • What happens to lava as its temperature increases?
    15·1 answer
  • Any help is appreciated! ​
    12·1 answer
  • A circular disk of radius 10 cm has a constant angular acceleration of 1.0 rad/s2 ; at t = 0 its angular velocity is 2.0 rad/s.
    14·1 answer
  • Crests of an ocean wave pass a pier every 10.0 s. if the waves are moving at 5.6 m/s, what is the wavelength of the ocean waves?
    10·1 answer
  • Which of the three objects is the largest? Explain your answer.
    7·1 answer
  • The ceiling of a large symphony hall is covered with acoustic tiles which have small holes that are 4.35 mm center to center. If
    13·1 answer
  • The work function of titanium metal is 6.93 x 10-19 J. Calculate the kinetic energy of the ejected electrons if light of frequen
    14·1 answer
  • How much power is required to carry a 35 N package a vertical distance of 18 m if the work on the package is accomplished in 30
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!