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antoniya [11.8K]

3 years ago

7

HELP PLEASE!!!!

2 answers:

Archy [21]3 years ago

6 0

<span>Suppose you mixed two chemicals in the lab until you could not tell the two apart. After some time passed, a white powder formed which would not dissolve, and settled on the bottom. The mixture was first homogeneous then heterogeneous. </span>

Leokris [45]3 years ago

5 0

The answer is C. Homogeneous, heterogeneous

Since you could not tell the two apart we can easily determine that it was at a homogeneous state, once we could determine that there is a different substance visible, we can determine that it is in fact heterogeneous

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Sedaia [141]

Answer:

5.5 kg

Explanation:

The gravitational potential energy of an object is given by

$U=mgh$

where

m is its mass

g is the acceleration of gravity

h is the height of the object above the ground

For the rock in the problem, we know:

h = 12 m is the height above the ground

U = 650 J

g = 9.8 m/s^2

Therefore, we can solve the equation for m, the mass of the rock:

$m=\frac{U}{gh}=\frac{650}{(9.8)(12)}=5.5 kg$

3 0

3 years ago

10. A golf ball is propelled with an initial velocity of 60

AlladinOne [14]

Answer:

See the answer below.

Explanation:

To find the horizontal component, we use the cos(θ).

$V_x=60\times cos(37^\circ)\\\\\approx 46\: m/s$

Best Regards!

4 0

3 years ago

Read 2 more answers

At the equator, near the surface of the Earth, the magnetic field is approximately 50.0 μT northward, and the electric field is

MArishka [77]

Answer:

A) F_g = 8.9278 × 10^(-30)

B) F_e = 1.6 × 10^(-17) N upwards

C) F_m = 6.8 × 10^(-17) N downwards

Explanation:

A) Formula for gravitational force is;

F_g = m_e × g

m_e is mass of electron = 9.11 x 10^(-31) kg

F_g = 9.11 x 10^(-31) × 9.8

F_g = 8.9278 × 10^(-30) N downwards

B) Formula for Electric force is;

F_e = qe

q is charge on electron = 1.6 × 10^(-19) C

E is electric field = 100 N/C

F_e = 1.6 × 10^(-19) × 100

F_e = 1.6 × 10^(-17) N upwards

C) Magnetic force is given by the formula;

F_m = qVB

q is charge on electron = 1.6 × 10^(-19) C

V is velocity given as 8.50 × 10^(6) m/s

B is magnetic field = 50.0 μT = 50 × 10^(-6) T

F_m = 1.6 × 10^(-19) × 8.50 × 10^(6) × 50 × 10^(-6)

F_m = 6.8 × 10^(-17) N downwards

6 0

3 years ago

A rock thrown with a horizontal velocity of 20m/s from a cliff that is 125m above level ground. If air resistance is negligible,

Alexxandr [17]

Answer: c

Explanation: 125/20 =6.25

6 0

3 years ago

A mass of 790 kg is hanging from a crane (neglect the mass of the cable and the hook). While the mass is being lowered, it is sp

Margarita [4]

Answer:

Explanation:

Given

mass of object hanging from crane is $m=790\ kg$

mass is speeding up with $a=2.7\ m/s^2$

If T is the Tension in the cable then

$mg-T=ma$

$T=mg-ma$

$T=m(g-a)$

$T=790\times (9.8-2.7)$

$T=790\times 7.1$

$T=5609\ N$

8 0

4 years ago