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3 years ago

What kind of scientist investigation involve making observations

Physics

2 answers:

Ivahew [28]3 years ago

6 0

When you study animals.

taurus [48]3 years ago

5 0

Scientists need to make observations when measuring growth rates of different organisms, when observing mating rituals of animals, and when determining characteristics of new substances. These are but a few examples.

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Calculate the force that the 4kg block exerts on the 10kg block

Kryger [21]

Acceleration=force/mass=28/(10+4)=2m/s^2

force10kg=ma=10*2
force4kg=ma=(10*2)=20
the4 kg is pushing against the 10kg block

vf=vi+at
-10=20*28/14 * t
t=30/2=15sec

i hope this can help you.

8 0

3 years ago

A skateboarder flies horizontally off a cement planter. After 3 seconds the skateboarder lands on the ground with a final veloci

evablogger [386]

Given the time, the final velocity and the acceleration, we can calculate the initial velocity using the kinematic equation A:

$v = v_o + a \Delta t$

A skateboarder flies horizontally off a cement planter. After a time of 3 seconds (Δt), he lands with a final velocity (v) of −4.5 m/s. Assuming the acceleration is -9.8 m/s² (a), we can calculate the initial velocity of the skateboarder (v₀) using the kinematic equation A.

$v = v_o + a \Delta t\\\\v_o = v - a \Delta t = (-4.5 m/s) - (-9.8 m/s^{2} ) \times 3 s = 24.9 m/s$

Given the time, the final velocity and the acceleration, we can calculate the initial velocity using the kinematic equation A:

$v = v_o + a \Delta t$

Learn more: brainly.com/question/4434106

3 0

3 years ago

A person spins a tennis ball on a string in a horizontal circle (so that the axis of rotation is vertical). At the point indicat

Ilya [14]

Answer:

direction does the axis of rotation tilt toward after the blow is the z- direction

Explanation:

This is because

Due to the blow, there is a impulse imparted on the ball which gives a change in linear momentum () in the x direction

Thus When cross product of momentum in x direction is taking with r vector, we will get resultant in z direction. Hence change in angular momentum will be z direction.

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3 years ago

Which of the conductor has the greatest resistance?

frozen [14]

Explanation:

R = V/I

Since this is an I/V graph, the greater the slope of the line the lower the R value.

Hence we find the line with the smallest slope, which is conductor M.

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3 years ago

Which of the following is the unit of momentum<br><br>a) ms-1 b) Kg ms-1<br><br>c) Ns d) Kgms-2

user100 [1]

Answer is b) I think

3 0

3 years ago

Read 2 more answers