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
bezimeni [28]
3 years ago
10

Which of the following measurements has two significant digits?

Physics
2 answers:
myrzilka [38]3 years ago
7 0
0.022 has 2 digits because you would count from the left starting with the first nonzero number
Shkiper50 [21]3 years ago
3 0
0.022km explanation: 0.3g only has 1 sig digit and so does thy other ones except for 0.022
You might be interested in
How does a sound wave transfer energy to your ears ?
KiRa [710]
It transfers energy through the source of the sound. Your ear detects sound waves when vibrating air particles cause your ear drum to vibrate
4 0
3 years ago
Read 2 more answers
An archer shoots an arrow with a velocity of 45.0m/s at an angle of 50.0degrees with the horizontal.An assistant standing on the
garri49 [273]

Answer:

a) u = 30.29 m/s

b) t = 2.09 s

Explanation:

given,

velocity = 45 m/s

angle (θ) = 50°

horizontal velocity = 45 cos 50°

time taken to reach 150 m.

times = \dfrac{150}{45 cos 50^0}

t  =  5.19 s

a) height of arrow

s = u t +\dfrac{1}{2}gt^2

s = v sin \theta \times t+\dfrac{1}{2}gt^2

s = 45 sin 50^0 \times 5.19 -\dfrac{1}{2}\times 9.81\times 5.19^2

s = 46.78 m

v² - u² = 2 g s

u² = 2 × 9.81 × 46.78

u = 30.29 m/s

b) time taken by the apple = \dfrac{u}{g}=\dfrac{30.29}{9.81}

                                             = 3.09 s

time after which it has to be thrown = 5.19-3.09 = 2.1 s

5 0
3 years ago
The windowpanes are___________ a. opaque b. transparent c. absorbent .
kogti [31]

Answer:

The windowpanes are- transparent.

The color of the panes are due to the wavelengths of light that the glass- allows to pass through

Explanation:

Just answered the question.

4 0
3 years ago
Read 2 more answers
Consider a river flowing toward a lake at an average speed of 3 m/s at a rate of 550 m3/s at a location 58 m above the lake surf
Vladimir [108]

Answer:

1. 0.574 kJ/kg

2. 315.7 MW

Explanation:

1. The mechanical energy per unit mass of the river is given by:

E_{m} = E_{k} + E_{p}

E_{m} = \frac{1}{2}v^{2} + gh

Where:

Ek is the kinetic energy

Ep is the potential energy

v is the speed of the river = 3 m/s

g is the gravity = 9.81 m/s²

h is the height = 58 m

E_{m} = \frac{1}{2}(3 m/s)^{2} + 9.81 m/s^{2}*58 m = 0.574 kJ/Kg

Hence, the total mechanical energy of the river is 0.574 kJ/kg.

2. The power generation potential on the river is:

P = m(t)E_{m} = \rho*V(t)*E_{m} = 1000 kg/m^{3}*550 m^{3}/s*0.574 kJ/kg = 315.7 MW

Therefore, the power generation potential of the entire river is 315.7 MW.

I hope it helps you!

4 0
3 years ago
1.   A car travels along a straight road to the east for 100 meters in 4 seconds, then go the west for 50 meters in 1 second.
Alla [95]

Answer:

a.Distance = 150 m

b. Displacement = 50 m

Time lapsed = 5 seconds

Explanation:

a. Distance is the change in the position of an object.

The distance covered by the car = 100 + 50

                                                   = 150 m

b. Since displacement is a vector quantity,

Displacement of the car = 100 - 50

                                        = 50 m due east

c. Time elapsed is the time taken for the motion of the car starting from when its starts to when it stops.

Thus, the time elapsed = 4 + 1

                        = 5 seconds

4 0
2 years ago
Other questions:
  • A string is wrapped several times around the rim of a small hoop with a radius of 8.00 cm and mass 0.180 kg. The free end of the
    15·1 answer
  • A hot spot is an area where material from deep within the mantle rises and melts through the crust above it. True or false need
    9·2 answers
  • The maximum number of orbits in an atom is
    9·2 answers
  • Describe the flow of energy that causes heat to be produced
    13·1 answer
  • A solar cell generates a potential difference of 0.25 V when a 550 Ω resistor is connected across it, and a potential difference
    12·1 answer
  • The lower the angle of the slope, ________ the acceleration along the ramp, therefore, the speed at the bottom of a slope will b
    13·1 answer
  • A baseball is hit high and far. Which of the following statements is true? At the highest point,
    6·1 answer
  • Which approach would be the most interested in studying Phineas Gage
    8·1 answer
  • I need help with one through six please
    6·1 answer
  • suppose you need to design a parachute system to help a remote camera land safely at the bottom of a cave. the camera will drop
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!