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Pavel [41]
3 years ago
6

Plssss I need help——— Balloon A is (A. Negatively, B. Not, C. Positively) charged, and balloon C is (A. Negatively, B. Not, C. P

ositively) charged. Balloon A approaches balloon C, there’ll be a force of (A. Attraction, B. Repulsion) between them.

Physics
1 answer:
makvit [3.9K]3 years ago
8 0

Answer:

B. Not

C. Positively

A. Attraction

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a 350 n force is required to accelerate a giant tortoise at 7 m/s2. what is the weight of the tortoise​
irina1246 [14]

Answer:

50kg

Explanation:

mass = force/acceleration

50kg = 350/7

3 0
3 years ago
Air resistance is a nonconservative force. It always opposes the motion of an object. An airplane flies from New York to Atlanta
LenKa [72]

Answer:

c) is negative

Explanation:

As we know that work done by a force is the product of force and displacement vector.

W= F.d

F= Force

d= displacement

The work done by friction force always negative because it try to oppose the motion and act opposite to the direction of displacement.So the work done by air resistance is negative.

c) is negative

8 0
3 years ago
A block with a mass of 33.0 kg is pushed with a horizontal force of 150 N. The block moves at a constant speed across a level, r
lord [1]

The work done is given by 742.5 J while the coefficient of kinetic friction between the block and the surface is 0.46.

<h3>What is the work done?</h3>

The work done is given by the use of the formula;

W = F * x

Where;

F = force applied

x = distance covered

W = 150 N *  4.95 m = 742.5 J

Now;

The coefficient of kinetic friction is given by;

μ = F/mg

μ = 150/ 33 * 9.8

μ = 0.46

Learn more about work done:brainly.com/question/13662169

#SPJ1

4 0
2 years ago
A volumetric flask made of Pyrex is calibrated at 20.0°C. It is filled to the 150-mL mark with 34.5°C acetone. After the flask i
8_murik_8 [283]

Answer:149.73 ml

Explanation:

Given

\beta \ of\ acetone=1.50\times 10^{-4} ^{\circ}C^{-1}

change in volume is given by

\Delta V=V_{final}-V_{initial}

\Delta V=\nu_{initial}\beta _{acetone}\left [ T_f-T_i\right ]

V_{final}=\nu_{initial}+\nu_{initial}\beta _{acetone}\left [ T_f-T_i\right ]

V_{final}=150+150\times 1.50\times 10^{-4}\left [ 20-32\right ]

V_{final}=149.73 ml

3 0
3 years ago
8. two +1 C charges are separated by 3000m. What is the magnitude of the electric force between them?
Sidana [21]

Answer:

1000 N

Explanation:

The magnitude of the electrostatic force between two charged object is given by

F=k\frac{q_1 q_2}{r^2}

where

k is the Coulomb constant

q1, q2 is the magnitude of the two charges

r is the distance between the two objects

Moreover, the force is:

- Attractive if the two forces have opposite sign

- Repulsive if the two forces have same sign

In this problem:

q_1=q_2=+1C are the two charges

r = 3000 m is their separation

Therefore, the electric force between the charges is:

F=(9\cdot 10^9)\frac{(1)(1)}{3000^2}=1000 N

8 0
3 years ago
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