Ask question

Ask question

All categories

3 years ago

10

Which of the following can sometimes be zero for a moving body i average velocity ii distance travelled iii average speed iv dis

placement

1 answer:

Anika [276]3 years ago

3 0

Answer:

<h3>displacement can be zero...because it only care about initial and final positions</h3>

You might be interested in

while playing her guitar , karen plucks one string with increasin levels of force. what effect does this have on the sound produ

kirza4 [7]

The sound will get louder.

3 0

3 years ago

11. Which of the following is a proper unit of

Sergeeva-Olga [200]

D is the correct answer!!

4 0

3 years ago

Read 2 more answers

A radioactive substance decays according to the formula w = 20e¡kt grams where t is the time in hours. a find k given that after

blagie [28]

W=20 e(-kt)
A. Rearranging gives k= -(ln(w/20)/t
Substituting w= 10 and solving gives k=0.014
B. Using W=20e(-kt). After 0 hours, W=20. After 24 hours, W=14.29g. After 1 week (24x7=168h) W=1.9g
C. Rearranging gives t=-(ln(10/20)/k. Substituting w=1 and solving gives t=214 hours.
D. Differentiating gives dW/ dt = -20ke(-kt). Solving for t=100 gives dW/dt = 0.07g/h. Solving for t=1000 gives 0.0000002g/h
E. dW/dt = -20ke(-kt). But W=20e(-kt) so dW/dt = -kW

5 0

3 years ago

An 85.0 kg fisherman jumps from a dock at a speed of 4.30 m/s onto their 135.0 kg boat. If the boat was at rest to begin but mov

jeka94

Answer:

Final speed of boat + man is 1.66 m/s

Explanation:

As we know that there is no friction on the system or there is no external force on this system

So here we can use momentum conservation here

$mv = (m + M)v_f$

so we have

m = 85 kg

M = 135 kg

v = 4.30 m/s

now we have

$85 \times 4.30 = (85 + 135) v$

$v = 1.66 m/s$

4 0

3 years ago

What is it plz help me!!

Darina [25.2K]

Answer:

second one

Explanation:

7 0

3 years ago

Read 2 more answers