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
Misha Larkins [42]
3 years ago
5

A bus driver drove from Philadelphia to Washington DC. He drove the first 100km in 2 hours, the next 55km in 1 hour, and the fin

al 75km in 2 hours. What is the average speek of the bus throughout the trip? a 77km/hr b 46km/hr c 81km/hr d 50km/hr
Physics
1 answer:
Alla [95]3 years ago
8 0

Answer:

b. 46 km/hr

Explanation:

Applying,

S' = d'/t'................... Equation 1

Where S' = Average speed of the bus, d' = Total distance covered by the bus, t' = Total time taken.

From the question,

d' = (100+55+75) km = 230 km

t' = (2+1+2) = 5 hours

Substitute these values into equation 1

S' = 230/5

S' = 46 km/hr.

Hence the correct option is b. 46 km/hr

You might be interested in
a sponge and a bar of soap occupy the same amount of space, but the soap is much more dense than the sponge
Alex Ar [27]
Yes, that's correct.  That's a big part of the reason why
the soap floats in water and the sponge sinks in it.

4 0
3 years ago
Read 2 more answers
A sample of water with a mass of 1 gram freezes at 32°F. At what temperature will a 100-gram sample of water freeze?
valkas [14]

Answer:

3200°F

Explanation:

just add two zero's to the end

8 0
3 years ago
A force of 14 N acts on a 5 kg object for 3 seconds.
DiKsa [7]

Answer: a) 42Nm b) 8.4m/s

Explanation:

Impulse is defined as object change in momentum.

Since Force = mass × acceleration

F = ma

Acceleration is the rate of change in velocity.

F = m(v-u)/t

Cross multiply

Ft = m(v-u)

Since impulse = Ft

and Ft = m(v-u)... (1)

The object change in velocity (v-u) = Ft/m from eqn 1

Going to the question;

a) Impulse = Force (F) × time(t)

Given force = 14N and time = 3seconds

Impulse = 14×3

Impulse = 42Nm

b) The object change in velocity (v-u) = Ft/m where mass = 5kg

v-u = 14×3/5

Change in velocity = 42/5 = 8.4m/s

3 0
3 years ago
Energy stored between charged particles is called
olga nikolaevna [1]
Electrical potential energy is the energy stored between charged particles.
7 0
2 years ago
Read 2 more answers
A car accelerates from rest at a constant rate 5m/s^2. Which of the following statements is true
dusya [7]

Answer:

jjhbkvjuhigjgyihbgtimnvyuoibc

8 0
3 years ago
Other questions:
  • A blank tells you what the different symbols and lines represent on a map
    8·1 answer
  • What will the motion of the cart be like when there is no force at all ? ( There is no friction in this model. )
    10·1 answer
  • A motorboat maintained a constant speed of 15 miles per hour relative to the water in going 10 miles upstream and then returning
    10·1 answer
  • How is the atmospheric pressure detected​
    5·2 answers
  • A man goes for a walk, starting from the origin of an xyz coordinate system, with the xy plane horizontal and the x axis eastwar
    5·2 answers
  • Which statement illustrates how engineering has influenced society?
    14·1 answer
  • A toy train is pushed forward and released at Xi = 4.0 m with a speed of 2.5 m/s. It rolls at a steady speed for 2.0 s, then one
    11·2 answers
  • Determine whether or not each of the following statement is true. If a statement is true, prove it. If the statement is false, p
    10·1 answer
  • A 8.5 kg brick is dropped onto a 6.5 kg toy truck, which is moving across a level floor at 0.50 m/s. With what velocity do the t
    13·1 answer
  • Nearly of women who had recently given birth screen positive for peripartum onset depression.
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!