45 Answered Questions for the topic Physics Math

#### Calculate the ball speed when it fall back to his hand and determine the time of the ball in the air before it fall back to the hand of the student.

A student throws a ball vertically upwards with a velocity of 30 m/s. Givenearth gravity, g = 10 N/kg.

08/11/20

#### Very hard hanging rod problem

A straight rod of 30 cm and 600 g mass is horizontally hanged on two upright, parallel and light threads, both of them attached with distances of 5 cm and 10 cm from its ends. Find tension forces...
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Physics Math

09/01/18

#### A small charged object on the end of a light string is suspended in equilibrium at an angle

A small charged object on the end of a light string is suspended in equilibrium at an angle. A sum of forces equal to zero in the x and y directions yield two equations Tcosθ= mg and Tsinθ= qE....
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#### A large punch bowl holds 3.35 kg of lemonade (which is essentially water) at 20.0° C.

A 0.40-kg ice cube at−10.2°C is placed in the lemonade. What is the final temperature of the system, and the amount of ice (if any) remaining? Ignore any heat exchange with the bowl or the...
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#### How much heat must be removed

from 0.81 kg of water at 0 degrees Celsius to make ice cubes at 0 degrees Celsius.?

05/02/18

#### A wheel of mass 10 kg and radius 2m rotates with angular velocity w= 2pi rad/s

a)If constant torque is applied to the wheel and it comes to rest in 2 seconds, what is the magnitude of the angular acceleration?
b) Calculate the magnitude of the torque required to bring the...
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Physics Math Physics

04/17/18

#### Physics Math

In an exciting game, a baseball player manages to safely slide into second base. The mass of the baseball player is 88.9 kg and the coefficient of kinetic friction between the ground and the player...
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Physics Math Physics

04/17/18

#### Physics Math

You are helping your friend move a new refrigerator into his kitchen. You apply a horizontal force of 265 N in the positive x direction to try and move the 59 kg refrigerator. The coefficient of...
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Physics Math Physics

03/27/18

#### Physics Math

An athlete with a mass of 64.0 kg is in a cross country race, and at one instant he has a speed of 4.50 m/s.
A.) What is his kinetic energy at this instant?
B.) If he wishes to double his...
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Physics Math Physics

03/27/18

#### Physics Math

How fast (in m/s) must a 2.7-g ping-pong ball move in order to have the same kinetic energy as a 145 g baseball moving at 35.0 m/s?

Physics Math

03/07/18

#### You shake a bottle of soda and take off the cap. If the soda shoots out of the bottle with a velocity of 12 m/s, how high will it go?

this is a physics question I can not understand it

Physics Math Physics

03/07/18

#### Physics Math

An ordinary workshop grindstone has a radius of 7.50 cm and rotates at 7500 rev/min. A.) Calculate the magnitude of the centripetal acceleration at its edge in meters per second squared and convert...
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Physics Math Physics

03/03/18

#### Physics Math

Consider the 62.0 kg mountain climber in the figure. https://imgur.com/a/TJIqs A.) Find the tension in the rope (in N) and the force that the mountain climber must exert with her feet (in N) on the...
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Physics Math Physics

03/02/18

#### Physics Math

A contestant in a winter games event pushes a 48.0 kg block of ice across a frozen lake with a rope over his shoulder at a 25 degree angle. The coefficient of static friction is 0.1 and the...
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Physics Math Physics

03/01/18

#### Physics Math

Mary applies a force of 76 N to push a box with an acceleration of 0.60 m/s^2.
When she increases the pushing force to 85 N, the box's acceleration changes to 0.87 m/s^2.
There is a constant...
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Physics Math Physics

03/01/18

#### Physics Math

In an exciting game, a baseball player manages to safely slide into second base. The mass of the baseball player is 88.9 kg and the coefficient of kinetic friction between the ground and the player...
more

Physics Math Physics

03/01/18

#### Physics Math

You are helping your friend move a new refrigerator into his kitchen. You apply a horizontal force of 265 N in the positive x direction to try and move the 59 kg refrigerator. The coefficient of...
more

Physics Math Physics

03/01/18

#### Physics Math

For a huge luxury liner to move with constant velocity, its engines need to supply a forward thrust of 7.50 X 10^5 N. What is the magnitude of the resisting force exerted by the water (in N) on the...
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02/25/18

#### Angle at which the ball moves after the collision

A ball moving at a speed of 6.5 m/s strikes a stationary ball of the same mass. The two balls undergo an elastic collision. After the collision, the first ball moves at an angle of 37º relative to...
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02/03/18

#### Physics Math

A football is kicked from ground level with an initial velocity of 23.0 m/s at angle of 45.0° above the horizontal. How long is the football in the air before it hits the ground? Ignore air...
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02/03/18

#### Physics Vectors Math

A projectile is launched at ground level with an initial speed of 50.0 m/s at an angle of 30.0º above the horizontal. It strikes a target above the ground 3.00 seconds later. What is the x distance...
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12/23/17

#### What is the value of n?

A ball is dropped from an height of 1m. After hitting the floor the ball bounces back and reaches half of its previous height. After hitting the ball n times the potential energy of the ball...
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#### 2 massive black holes collided and released the equivalent energy of 3 solar masses.

Energy released: E =mc2=[3(1.99 x 1030)kg](3.00 x 108 m/s)2 = 5.373 x 1047 J
compare the energy released to that of a 1 megaton nuclear bomb (how many times more powerful the release was)

#### A beam of light has a wavelength of 1060nm.

What color/area of EMR spectrum does this represent?

#### A beam of light has a wavelength of 1060nm. What is it’s frequency?

What is it’s frequenc? If the beam of light has a wavelength of 1060nm.

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