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
Lesechka [4]
3 years ago
12

Please help me with this science question.

Physics
1 answer:
drek231 [11]3 years ago
8 0
The answer would possibly be H in my mind
You might be interested in
A runner is running to the left with a speed of 8.0\,\dfrac{\text m}{\text s}8.0 s m ​ 8, point, 0, start fraction, start text,
Alla [95]

Answer:

The runner's acceleration as she sped up to the finish line is 0.95m/s²

Explanation:

Acceleration is the change in velocity of a body with respect to time. It is expressed as;

Acceleration = change in velocity/time

Change in velocity = final velocity - initial velocity

Acceleration = final velocity - initial velocity / time

Given initial speed = 8.0m/s

Final speed = 9.9m/s

Time taken = 2.0s

Acceleration = 9.9-8.0 / 2.0

Acceleration = 1.9/2

Acceleration = 0.95m/s²

4 0
4 years ago
Read 2 more answers
Noah drops a rock with a density of 1.73 g/cm3 into a pond. Will the rock float or sink? Explain your answer
stealth61 [152]

Answer:

Sink

Explanation:

Water has a density of 1 g/cm³.  Since the density of the rock is greater than the density of water, the rock will sink.

4 0
3 years ago
Read 2 more answers
Please help
marishachu [46]

Answer:

The two moments must be the same:

p1=p2

m1v1=m2v2

v2=(m1v1)/m2

v2=(90 kg x 0.9 m/s)/110kg=0.7 m/s

3 0
3 years ago
Physics // how i solve?
Alex

V=IR

180mA=V/R

I=2V/3R

I=2/3 x 180 mA =120 mA

7 0
3 years ago
A steel drill making 180 rpm is used to drill a hole in a block of steel. The mass of the steel block and the drill is 180 g. If
SVETLANKA909090 [29]

Answer:

a) 37.8 W

b) 2 Nm

Explanation:

180 g = 0.18 kg

We can also convert 180 revolution per minute to standard angular velocity unit knowing that each revolution is 2π and 1 minute equals to 60 seconds

180 rpm = 180*2π/60 = 18.85 rad/s

We can use the heat specific equation to find the rate of heat exchange of the steel drill and block:

\dot{E} = mc\Delta \dot{t} = 0.18*420*0.5 = 37.8 J/s

Since the entire mechanical work is used up in producing heat, we can conclude that the rate of work is also 37.8 J/s, or 37.8 W

The torque T required to drill can be calculated using the work equation

E = T\theta

\dot{E} = T\dot{\theta} = T\omega

T = \frac{\dot{E}}{\omega} = \frac{37.8}{18.85} = 2 Nm

7 0
4 years ago
Other questions:
  • Ack to Content II 2.11 Quiz: Pro Which option is an example of a physical property<br>​
    14·1 answer
  • A train started from rest and moved with constant acceleration. At one time it was traveling 27 m/s, and 150 m farther on it was
    12·1 answer
  • How are lysosomes simular to vacuoles
    14·1 answer
  • List four ways a person can withdraw money from a<br> checking account.
    10·1 answer
  • Add these measurements, using significant digit rules:<br><br> 1.0090 cm + 0.02 cm = cm
    15·1 answer
  • What is the action force of a bug hitting a windshield?
    13·1 answer
  • Wondering if someone can please explain why this question is unsound;
    9·1 answer
  • HEYY PLEASE HELP ME!! +50 POINTS!!! WILL GIVE BRANLIEST IF CORRECT!!
    6·2 answers
  • You are generating traveling waves on a stretched string by wiggling one end. If you suddenly begin to wiggle more rapidly witho
    6·1 answer
  • A 400 W computer is turned on 8 hours per day. If electricity costs 10 cents per kwh. How much does it cost to run the computer
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!