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3 years ago

In a scientific experiment, the_

Physics

2 answers:

inysia [295]3 years ago

7 0

C dependent variable because dependent means relying on something else

Svetradugi [14.3K]3 years ago

5 0

The value of a dependent variable changes in response to other changes in a scientific experiment.

Answer: Option C

Explanation:

In the course of going through a scientific experiment, we encounter two types of variables in the calculations,

An independent variable
The dependent variable

An independent variable doesn’t change in terms of values throughout the experiment and remains constant respective to all the changes whereas dependent variables are affected by the changes in the values of other variables or the modes of experiment.

The independent variable is termed as the presumed cause and the dependent variable is termed as the presumed effect. The subject of experiment is to find out the exact or relevant values of the dependent variables that can be a person, place, thing or a phenomenon.

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A ____ is the time required for one half of the nuclei in a radio- ____ isotope to decay.

sukhopar [10]

Answer:

A half-life is the time required for one half of the nuclei in a radio- active isotope to decay.

Explanation:

A radio-active isotope is an isotope which undergoes radioactive decay.

Radioactive decay is a spontaneous process in which the nucleus of an atom changes its state (turning into a different nucleus, or de-exciting), emitting radiation, which can be of three different types: alpha, beta or gamma.

The half-life of a radio-active isotope is the time required for half of the nuclei of the initial sample to decay.

The law of radio-active decay can be expressed as follows:

$N(t) = N_0 (\frac{1}{2})^{t/t_{1/2}}$

where

N(t) is the number of undecayed nuclei left at time t

N0 is the initial number of nuclei

t is the time

$t_{1/2}$ is the half-life

We see that when $t=t_{1/2}$ (that means, when 1 half-life has passed), the number of undecayed nuclei left is

$N(t) = N_0 (\frac{1}{2})^{t_{1/2}/t_{1/2}}=N_0 (\frac{1}{2})^1=\frac{N_0}{2}$

So, half of the initial nuclei.

5 0

3 years ago

A 150 kg bike takes a roundabout with a radius of 53.0 m. The roundabout it’s only ¾ of a circle. the time taken was 0.35 minute

BigorU [14]

Answer:

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Explanation:dfbgdhzfgbfxgzbfxd

fadwgfrsdfkyugılhşojipdaftshrthsxxfbzxryfchtgghxfjnx hjnnvbm bn dfkunggvxbvbbfbfxxb

5 0

3 years ago

Find the momentum of a 25kg object traveling at a speed of 4m/s

solong [7]

Answer:

100Kg.m/s

Explanation:

From the question, we obtained the following information:

M= Mass = 25kg

V = Velocity = 4m/s

Momentum =?

Momentum = MV = 25x4= 100Kg.m/s

8 0

3 years ago

Which has more kinetic energy, a 4.0 kg bowling ball moving at 1.0 m/s or a 1.0 kg

jolli1 [7]

Answer:

The kinetic energy of bocce ball is more.

Explanation:

Given that,

Mass of a bowling ball, m₁ = 4 kg

Speed of the bowling ball, v₁ = 1 m/s

Mass of bocce ball, m₂ = 1 kg

Speed of bocce ball, v₂ = 4 m/s

We need to say which has more kinetic energy.

The kinetic energy of an object is given by :

$E=\dfrac{1}{2}mv^2$

Kinetic energy of the bowling ball,

$E_1=\dfrac{1}{2}m_1v_1^2\\\\E_1=\dfrac{1}{2}\times 4\times (1)^2\\\\E_1=2\ J$

The kinetic energy of the bocce ball,

$E_2=\dfrac{1}{2}m_2v_2^2\\\\E_2=\dfrac{1}{2}\times 1\times (4)^2\\\\E_2=8\ J$

So, the kinetic energy of bocce ball is more than that of bowling ball.

5 0

3 years ago

e force acting between two charged particles A and B is 5.2 × 10-5 newtons. Charges A and B are 2.4 × 10-2 meters apart. If the

anastassius [24]

The force acting between the particles is

$F=k \frac{Q_{1}Q_{2}}{r^2}$
Then
$Q_{2}= \frac{5.2 \times 10^-^5 \times 0.024^2}{ 9.0 \times 10^9 7.2 \times 10^-^8} =4.622 \times 10^-^1^1C$

7 0

3 years ago

Read 2 more answers