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3 years ago

13

Calculate What is the atomic number of a sodium atom that has 11 protons and 12 neutrons

1 answer:

miv72 [106K]3 years ago

8 0

Answer:

11 because the number of protons is the atomic humber

Explanation:

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What is a topgraphic map?

Anuta_ua [19.1K]

Answer:

A topographic map is a map that indicates the features of the land's surface, such as mountains, hills, and valleys. This is usually done with wavy lines that represent the curves and elevation of the land.

8 0

3 years ago

Bonus: What is the velocity of an 8 kg lead shot-put if it has 484 J of energy? Type here to search e

Dima020 [189]

Answer:

11m/s

Explanation:

Given parameters:

Mass of the lead shot = 8kg

Energy of the shot = 484J

Unknown:

Velocity of the shot = ?

Solution:

To solve this problem, we apply the kinetic energy formula;

K.E = $\frac{1}{2}$ m v²

m is the mass

v is the unknown

Now, insert the parameters and solve;

484 = $\frac{1}{2}$ x 8 x v²

484 = 4v²

v² = 121

v = 11m/s

7 0

3 years ago

1. Classify What type of heat transfer occurs

valentina_108 [34]

Convection because I’m in seventh grade

5 0

4 years ago

Read 2 more answers

determine the greates possile acceleration of the 975 kg race car so that its front wheels do not leace the gorund

wolverine [178]

<u>Answer</u>:

The greatest possible acceleration of the car is $a_G= 6.78 m/s^2$

<u>Explanation</u>:

$N_A+N_B-Mg = 0$

$-N_Aa +N_B(b-a)- \mu_s N_Bh - \mu_s N_Ah = 0$

$0.8N_B +0.8N_A = 975a_G$

$N_A+N_B = 9564.75$ -------------(1)

$-N_A(1.82) + N_B(2.20 -1.82) -0.9N_B(0.55)-0.8N_A(0.55)=0$

$-N_A(1.82) +0.38 N_B -0.44N_B -0.44N_A=0$

$-2.26N_A -0.06N_B= 0$ ----------------(2)

Solving the equation (1) and(2)

$N_A + N_B = 9564.75$

$-2.26N_A-0.06N_B=0$

$N_A = -260.85N$

$N_B = 9825.60N$

$\mu_s N_B + \mu_s N_A = 975a_G$

$0.8(9825.60)+0.8(-260.85) = 975a_G$ $a_G=\frac{7651.8}{975}$ $a_G_1=7.4848m/s^2$

Next lets assume that the front wheels contact with the ground N_A = 0

$F_B = Ma_G$

$N_B = M_g$

$N_B - M_g = 0$

$N_B(b-a) –F_Bh = 0$

$F_B = 975a_G$

$N_B-975(9.8) = 0$

$N_B=9564.75N$

$9564.75(2.20 -1.82) -F_B(0.55)=0$

$\frac{3634.605}{0.55}=F_B$

$F_B = 6608.3$

$F_B = Ma_G$

$6608.3 = 975a_G$

$a_G = 6.7778 m/s^2$

$a_G_2 = 6.78m/s^2$

Choosing the critical case

$a_G = min(a_G_1 ,a_G_2)$

$a_G = min(7.848, 6.78)$

$a_G= 6.78 m/s^2$

3 0

4 years ago

What is her velocity

fenix001 [56]

The speed of something in any given direction.

7 0

3 years ago