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Valentin [98]
3 years ago
11

Please help ASAP- A book has a mass of 5 kg, a baby has a mass of 5 kg. Which one weighs more?

Physics
2 answers:
Sphinxa [80]3 years ago
7 0

Answer:

Same mass

Explanation:

5kg and 5kg are the same that's the explanation

mihalych1998 [28]3 years ago
4 0
They weigh the same.
Weight = mass * gravity
W of the baby = 5 * 9.81
W of the book = 5 * 9.81
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A car travels at an average speed of 60km/h for 15 minutes. How far does the car travel in this time?
jok3333 [9.3K]

Answer:

In 15 minutes the car travels a distance of 15 km.

Explanation:

4 0
2 years ago
Read 2 more answers
Two loudspeakers emit sound waves along the x-axis. The sound has maximum intensity when the speakers are 19 cm apart. The sound
Roman55 [17]

Answer:

a.96cm

b.77cm

Explanation:

Highest intensity,d_1=19cm

Lowest intensity,d_2=29cm

d_1+d_2=19+29=48cm  

48cm is the distance for half-wave, wavelength =48cm*2=96cm

b. From a, above we know that half-wavelength is 48cm

Also, the distance of known  maximum is 29cm

Next maximum is calculated as:

Next \m\aximum=Last \ Maximum+ \ 0.5Wavelength\\=29cm+48cm\\=77cm

The next maximum will occur at 77cm

6 0
3 years ago
How many atoms are in a 2.70 cm × 2.70 cm × 2.70 cm cube of aluminum?
Bess [88]

First, we calculate for the total volume of aluminum. The volume of a cube is:

V = s * s * s = s^3

V = (2.70 cm)^3

V = 19.683 cm^3

Assuming atmospheric temperature, the density of aluminum is about 2.70 g / cm^3. Therefore the equivalent mass of aluminum is:

m = 19.683 cm^3 * 2.70 g / cm^3

m = 53.1441 g

The molar mass of aluminum is 27 g / mol. Therefore the number of moles is:

n = 53.1441 g / (27 g / mol)

n = 1.9683 mol

Given the number of moles, we can calculate for the number of atoms using Avogadro’s number.

atoms = 1.9683 mol * (6.022 * 10^23 atoms / mol)

<span>atoms = 11.85 * 10^23 atoms               (ANSWER)</span>

4 0
3 years ago
I'm contrast to Venus the coldest temperature yet measured on the surface of any body in the solar system is -235C
DENIUS [597]

Answer:

Explanation:

I don't get what the relation here is. Venus is the hottest planet in our solar system. And yes, it's hotter than mercury despite mercury being closer to the sun. And your question talks about the coldest temperature measured which is -235 degrees Celsius. That surely isn't measured on Venus. I'm only wondering what Venus has got to go with cold and what exactly your question is

6 0
3 years ago
A hiker walks 4.5 km at an angle of 45° north of west. Then the hiker walks 4.5 km south. What is the magnitude,angle, and direc
maksim [4K]

Answer:

Magnitude of the hiker's total  displacement = 3.5 km

Angle and direction of the hiker's total  displacement = 22 degree south of west

Explanation:

The first Displacement in vector form is

s_1 = -4.5 cos 45i +4.5 sin 45j

= -3.182i + 3.182j

The second Displacement in vector form is  

s_2= -4.5j

The total displacement is ,

s = s_1+ s_2

= -3.182i + 3.182j - 4.5j

=-3.182i-1.318j

The magnitude of the displacement is,

s= \sqrt{(-3.182)^2 + (-1.318)^2\\

s=\sqrt{10.125+1.7371}

s=\sqrt{11.862}

s= 3.444

The direction is,

\theta = tan^{-1}(\frac{1.318}{3.182})

\theta = tan^{-1}(0.4142)

\theta = 22.49^{\circ}

8 0
3 years ago
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