All categories

3 years ago

Which of the following are vector quantities?

Physics

2 answers:

pshichka [43]3 years ago

8 0

Answer:

Vector Quantity: A physical quantity is said to be a vector quantity when it has both magnitude and direction. The scalar quantities are distance, mass, time, volume, density, speed, temperature, and energy, The vector quantities are weight, velocity, acceleration, and force.

Explanation:

Mark me brainleist PLZZZZ

devlian [24]3 years ago

6 0

The answer to your question is force, velocity, acceleration and momentum!!

You might be interested in

Two bodies, one hot and one cold, are kept in vacuum. What will happen to the temperature of the hot body after some time?

SVETLANKA909090 [29]

Answer:

vacuum have no air. so, the hot body will remain unchanged in temperature

Explanation:

4 0

2 years ago

What factors affect the amount of solar energy that reaches earth's surface

zalisa [80]

Weather
Particles in air such as smoke smog

8 0

3 years ago

Read 2 more answers

Mercury is a liquid metal having a density of 13.6 g/mL. What is the

sergij07 [2.7K]

Answer:

$\boxed {\boxed {\sf v \approx 33.088 \ mL}}$

Explanation:

The formula for density is:

$d= \frac{m}{v}$

where <em>m</em> is the mass and <em>v</em> is the volume.

The mass is 0.45 kilograms and the density is 13.6 grams per milliliter. The density is given in grams, so we must convert the mass.

There are 1000 grams in 1 kilogram or $\frac{1000 \ g} {1 \ kg}$ . We can multiply the mass by this ratio.

$0.45 \ kg * \frac{1000 \ g} {1 \ kg} = 0.45 * 1000 \ g = 450 \ g$

Now we have values for the mass and density:

$13.6 \ g/mL =\frac{450 \ g}{ v}$

Cross multiply.

$\frac {13.6 \ g/mL}{1} =\frac{450 \ g}{ v}$

$13.6 \ g/mL * v=450 \ g * 1 \\13.6 \ g/mL * v=450 \ g$

We are trying to find the volume, so we must isolate that variable.

13.6 and v are being multiplied. The inverse of multiplication is division. Divide both sides by 13.6

$\frac {13.6 \ g/mL*v } { 13.6 \ g/mL} = \frac{ 450 \ g} {13.6 \ g/mL}$

$v= \frac{ 450 \ g} {13.6 \ g/mL}$

The grams will cancel.

$v= 33.0882353 \ mL\\v \approx 33.088 \ mL$

The volume is about 33.088 milliliters.

3 0

2 years ago

A sample of ore containing radioactive strontium 38Sr90 has an activity of 8.2 × 105 Bq. The atomic mass of strontium is 89.908

ahrayia [7]

From the activity values and the decay constant, the mass of of Strontium in the sample is:

$1.62 × 10^{-7}g$

<h3>What is the decay constant of an element?</h3>

The decay constant of an element is the probability of decay of a nucleus per unit time.

{λ = ln 2 / t1/2

where;

t1/2 is the half-life of the isotope.

The half-life is converted to seconds since the decay constant is asked in per seconds.

$28.8 years = 28.8 × 3.156 × 10^{7} = 908928000 s \\$

Hence;

$λ = \frac{ln2}{90892800s} = 7.626 s^{-1}$

The activity of the element, A, the decay constant, λ and the number of nuclei, N are related as follows:

A = (–) λN

$N = \frac{8.25 ×10^{5}}{7.626×10^{-10}} = 1.082 × 10^{15}$

Molar mass of Strontium-90 is 90 g.

1 mole of Strontium-90 contains 6.02×10^23 nuclei.

The mass, m of Strontium in the sample is calculated:

$m = 1.082 × 10^{15} × \frac{90 g}{6.02 × 10^{23}} = 1.62 × 10^{-7}g \\$

Therefore, the mass of of Strontium in the sample is:

$1.62 × 10^{-7} \: g$

Learn more about decay constant at: brainly.com/question/17159453

5 0

2 years ago

Many fitness programs include weight training, which A. can be used in place of aerobic exercise, when done regularly. B. helps

11Alexandr11 [23.1K]

The answer would be C) because weight lifting is used to increase your muscular strength, and that's why you try and add more weight during sessions, so it's not too easy for you and you can build a higher endurance.

6 0

2 years ago