PHYSICS HIGH SCHOOL

Which situations contain unbalanced forces? Check all that apply.

Answers

Answer 1
Answer:

Answer: A book falls to the floor.

A car skids to a stop.

A foam ball launches

Explanation:
Answer 2
Answer:

Answer:

Explanation:

Without seeing the options i can tell you this:

A balanced force is equal on both sides

The friction would equal the force

The amount on the left (friction side) would equal the amount on right (force side)

Or the net force would equal zero

You should post the answer options for more help

Related Questions

Which explains how the Coriolis effect causes air circulation? A. Air from the equator moves toward the poles faster than the ground below it, so friction causes the air to veer west. In contrast, air from the poles moves toward the equator slower than the ground below it, so friction causes it to veer to the east. B. Air from the equator moves toward the poles faster than the ground below it, so friction causes the air to veer east. In contrast, air from the poles moves toward the equator slower than the ground below it, so friction causes it to veer to the west. C. Air from the poles moves toward the equator faster than the ground below it, so friction causes the air to veer east. In contrast, air from the equator moves toward the poles slower than the ground below it, so friction causes it to veer to the west. D. Air from the equator moves toward the poles slower than the ground below it, so friction causes the air to veer east. In contrast, air from the poles moves toward the equator faster than the ground below it, so friction causes it to veer to the west.
Ted wants to hang a wall clock on the wall by using a string. If the mass of the wall clock is 0.250 kilograms, what should be the tension of the string so that it can sustain the weight of the wall clock?
Nuclear energy use can negatively impact water quality. Please select the best answer from the choices provideda. True b. False
A large container of water is sitting on a balance. The weight of the container plus the water is 10 newtons. An object the weight of 7 newtons hanging from a forcemeter is lowered towards the surface of the water . what reading on the force meter would you expect?
During a thunder storm, movement of water molecules within clouds creates friction which causes the bottom of the clouds to become negatively charged. This means that the bottom of the cloud and the ground begin to act like parallel plates. Once the electric field between the clouds and the ground becomes larger than 3.0 x 10^6 N/C, lightning will strike. a. If the bottom of the cloud is 150 m above the ground, determine the electric potential difference between the ground and the cloud.

A 11.0 g rifle bullet is fired with a speed of 380 m/s into a ballistic pendulum with mass 10.0 kg, suspended from a cord 70.0 cm long.a) Compute the vertical height through which the pendulum rises.(cm)
b) Compute the initial kinetic energy of the bullet;(j)
c) Compute the kinetic energy of the bullet and pendulum immediately after the bullet becomes embedded in the pendulum.(j)

Answers

a. The vertical height through which the pendulum rises is equal to 0.9 cm.

b. The initial kinetic energy of the bullet is equal to 794.2 Joules.

c. The kinetic energy of the bullet and pendulum immediately after the bullet becomes embedded in the pendulum is equal to 0.883 Joules.

Given the following data:

  • Mass of bullet = 11.0 g
  • Speed = 380 m/s
  • Mass of pendulum = 10.0 kg
  • Length of cord = 70.0 cm

a. To determine the vertical height through which the pendulum rises:

First of all, we would find the final velocity by applying the law of conservation of momentum:

Momentum of bullet is equal to the sum of the momentum of bullet and pendulum.

M_bV_b = (M_b + M_p)V

Where:

  • M_b is the mass of bullet.
  • M_p is the mass of pendulum.
  • V_b is the velocity of bullet.
  • V is the final velocity.

Substituting the given parameters into the formula, we have;

0.011* 380 = (0.011+10)V\n\n4.18 = 10.011V\n\nV = (4.18)/(10.011)

Final speed, V = 0.42 m/s

Now, we would find the height by using this formula:

Height = (v^2)/(2g) \n\nHeight = (0.42^2)/(2* 9.8) \n\nHeight = (0.1764)/(19.6)

Height = 0.009 meters.

In centimeters:

Height = 0.009 * 100 = 0.9 \;cm

b. To compute the initial kinetic energy of the bullet:

K.E_i = (1)/(2) M_bV_b^2\n\nK.E_i = (1)/(2) * 0.011 * 380^2\n\nK.E_i = 0.0055* 144400\n\nK.E_i = 794.2 \; J

Initial kinetic energy = 794.2 Joules

c. To compute the kinetic energy of the bullet and pendulum immediately after the bullet becomes embedded in the pendulum:

K.E = (1)/(2) (M_b + M_p)V^2\n\nK.E = (1)/(2) *(0.011 + 10) * 0.42^2\n\nK.E = (1)/(2) * 10.011 * 0.1764\n\nK.E = 5.0055 * 0.1764

Kinetic energy = 0.883 Joules.

Read more: brainly.com/question/20693852

Answer:

a) h = 0.0088 m

b) Kb = 794.2J

c) Kt = 0.88J

Explanation:

By conservation of the linear momentum:

m_b*V_b = (m_b+m_p)*Vt

Vt = (m_b*V_b)/(m_b+m_p)

Vt=0.42m/s

By conservation of energy from the instant after the bullet is embedded until their maximum height:

1/2*(m_b+m_p)*Vt^2-(m_b+m_p)*g*h=0

h =(Vt^2)/(2*g)

h=0.0088m

The kinetic energy of the bullet is:

K_b=1/2*m_b*V_b^2

K_b=794.2J

The kinetic energy of the pendulum+bullet:

K_t=1/2*(m_b+m_p)*Vt^2

K_t=0.88J

Superposition of two wave crests produces

Answers

Superposition of two wave crests produces addtion (increase) of the crests.

How do wind turbines pollute their environment?

Answers

Although the wind turbines do not pollute the environment directly, it is still able to pollute the environment indirectly. The maintenance, construction, and the assembly of the wind turbines would make use of equipment or machines that would emit some harmful substances. For example, the delivery of the materials, the turbine parts, and the other equipment would entail a lot of back and forth trips. The deliverer, from his vehicle, would sometimes emit smoke or gas from his vehicle that is dangerous to health. 
Wind turbines in fact to pollute the environment. They pollute the environment because when they are being built or manufactured, pollution is produced. Wind power does produce pollution. It also takes up space in land. In farms they take up a lot of space so then we cannot grow crops and animals cannot live there. One turbine can give electricity to about 400 homes. Imagine how many you will need to power a whole country! The turbines are also very loud. It can damage peoples ears when they are near one.

A wave with a wavelength of 69 meters has a period of 13 seconds. What is the speed of the wave?5.3 m/s
897 m/s
0.19 m/s
41 m/s

Answers

5.3 m/s
-------------------------------
The answer to this is 5.3 cause if you divide both of 69 and 13 it equals 5.3

Which satellite gave us our first photograph of Earth from space?

Answers

The correct answer is explorer 6

Final answer:

The first satellite to capture a photograph of Earth from space was Explorer 1, launched on January 31, 1958. This and subsequent space missions like the Apollo program expanded our visual understanding and perception of our planet.

Explanation:

The first satellite to give us a photograph of the Earth from space was Explorer 1, launched on January 31, 1958. Prior to Explorer 1, the Soviet Union had launched Sputnik 1 in October 1957, but Explorer 1 was the first satellite to provide us with images of Earth from space. This marked a significant moment in human history, altering our perception of the planet.

Later on, the Apollo program further improved our visual understanding of Earth, with the Apollo 17 mission capturing the 'Blue Marble' - one of the rare full disk images of the Earth in sunlight. Such images underscored our perception of Earth as a small, yet interconnected and strikingly beautiful, celestial body floating in the vastness of space.

Learn more about First Satellite Photograph of Earth here:

brainly.com/question/39155367

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1 kg of rice is weighed by​

Answers

Answer:

beam balance

Explanation:

A beam balance compares the sample mass with a standard reference mass
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