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
Rus_ich [418]
2 years ago
7

Which of the following changes would not lead to changes in the efficiency of

Physics
1 answer:
xxTIMURxx [149]2 years ago
4 0

Explanation:

B. Doubling the heat flow into the engine while halving the work done

hope this helps you

have a nice day

You might be interested in
A box that is sliding across the floor experiences a net force of 10.0 N. If the box has a mass of 1.50 kg, what is the resultin
Maksim231197 [3]

Answer:

a = 6.67 m/s²

Explanation:

F = 10.0 N

m = 1.50 kg

a = ?

F = ma

10.0 = (1.50)a

6.67 = a

7 0
2 years ago
What is newtons first law of motion​
Brums [2.3K]
An object in motion will remain in motion unless an outside force stops is.
6 0
3 years ago
A spring with a spring constant of 110n/m is stretched by 12 cm in the positive direction. How much force is applied to the spri
taurus [48]

The force applied on the spring to stretch it is 13.2 N.

Hooke's law is a law of elasticity discovered by the English scientist Robert Hooke in 1660 that states that the displacement or size of a deformation is directly proportional to the deforming force or load for relatively small deformations of an object. When the load is removed under these conditions, the object returns to its original shape and size.

According to Hooke's law, F = k*e

where F is the force on the spring

k is force constant

and e is extension

F = (110)*(0.12)

F = 13.2 N

For more information on Hooke's law, visit :

brainly.com/question/13348278

#SPJ4

7 0
1 year ago
a ball is projected upward at time t = 0.00 s from a point on a roof 70 m above the ground. The ball rises, then falls and strik
grin007 [14]

Answer: 17.68 s

Explanation:

This problem is a good example of Vertical motion, where the main equation for this situation is:  

y=y_{o}+V_{o}t-\frac{1}{2}gt^{2} (1)  

Where:  

y=0 is the height of the ball when it hits the ground  

y_{o}=70 m is the initial height of the ball

V_{o}=82m/s is the initial velocity of the ball  

t is the time when the ball strikes the ground

g=9.8m/s^{2} is the acceleration due to gravity  

Having this clear, let's find t from (1):  

0=70m+(82m/s)t-\frac{1}{2}(9.8m/s^{2})t^{2} (2)  

Rewritting (2):

-\frac{1}{2}(9.8m/s^{2})t^{2}+(82m/s)t+70m=0 (3)  

This is a quadratic equation (also called equation of the second degree) of the form at^{2}+bt+c=0, which can be solved with the following formula:

t=\frac{-b \pm \sqrt{b^{2}-4ac}}{2a}  (4)

Where:

a=-\frac{1}{2}(9.8m/s^{2}

b=82m/s

c=70m

Substituting the known values:

t=\frac{-82 \pm \sqrt{82^{2}-4(-\frac{1}{2}(9.8)(70)}}{2a}  (5)

Solving (5) we find the positive result is:

t=17.68 s

7 0
2 years ago
¿Que es un átomo???????
disa [49]
Un átomo es una porción material menor de un elemento químico que interviene en las reacciones químicas y posee las propiedades características de dicho elemento.
5 0
3 years ago
Other questions:
  • The compound LiBr is an example of
    12·1 answer
  • When the elevator is mobing upwards but its slowing to a stop at the top floor. what is the direction of the net firce on the ri
    15·1 answer
  • What does it mean if a conductor is in "electrostatic equilibrium"? a) The conductor is at rest.
    5·1 answer
  • A stone falls from rest from the top of a cliff,a second stone is thrown do wnward from the same height 2sec later with an initi
    15·1 answer
  • Calcula la dilatación volumétrica de una solución de glicerina que tiene un volumen inicial de 16 litros a 20⁰C y se calienta a
    6·1 answer
  • When solving projectiles you will often get two possible times for solutions. Sometimes a time will be negative and can be rejec
    5·1 answer
  • 8. What is the S.l unit for mass?<br> A. kg<br> B. m/s2<br> D.N<br> C. m/s
    10·1 answer
  • In order to get the most accurate mass measurement, you must __(blank)__.
    5·1 answer
  • DUE IN AN HOUR! HELP!!
    7·1 answer
  • What most directly determines an object's state of matter? (Please help)
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!