44 Answered Questions for the topic Physics Math

#### If the moon suddenly moved three times closer to earth, the gravitational force between the earth and the moon would...?

mathmatical problem

11/12/17

#### two Massive black holes collided and in the process released the equivalent energy of 3 solar masses. How much energy was released?

Mass of the sun = 1.99x10^30 kg. Energy released by 1 megaton bomb is about 4x10 ^15 joules.

Physics Math Physics

11/02/17

#### What is the average speed of a jet transport that flies 5000 km in 6 h 20 min?

Can you write out the equation of the problem to the end. If you can that would be great.

10/23/17

#### What volume of iron (density 7.87 g/cm3) would be required to balance a 1.00 cm3 sample of lead (density 11.4 g/cm3) on a two-pan laboratory balance?

What volume of iron (density 7.87 g/cm3) would be required to balance a 1.00 cm3 sample of lead (density 11.4 g/cm3) on a two-pan laboratory balance?

10/23/17

#### If copper has a density of 8.96 g/cm3, what is the volume of 6,000 g of copper?

If copper has a density of 8.96 g/cm3, what is the volume of 6,000 g of copper?

10/23/17

#### What volume of copper (density 8.96 g/cm3) would be needed to balance a 2.52 cm3 sample of lead (density 11.4 g/cm3) on a two-pan laboratory balance?

What volume of copper (density 8.96 g/cm3) would be needed to balance a 2.52 cm3 sample of lead (density 11.4 g/cm3) on a two-pan laboratory balance?

10/23/17

#### What is the volume of a rock with density 3.68 and mass of 430 g?

What is the volume of a rock with a density of 3.68 g/cm3 and a mass of 430 g?

10/16/17

#### Projectile motion - solving for launch velocity

A ball is hit at an initial velocity, 30° (above the horizontal) off a 20 m high cliff. Solve for the launch velocity given that the ball hits the ground at a speed of 25.1 m/s

Physics Math

10/15/17

#### Hulk's average running speed is 5 m/s. With you in his arms, how fast can he run?

The Hulk has mass of 1050 kg and you have a mass of 60 kg.

Physics Math

10/15/17

#### You move 1 m/s to the right in 1 second. If your mass is 66 kg and your friend's mass is 91 kg, at what speed did he push you?

You are standing still and your friend pushes you from the left,

Physics Math Ap Physics

10/09/17

#### a student runs 30 meters west. then she turns 40 degrees toward the south and runs for 120 meters. find the resultant displacement.

include 3 significant figures and correct units please.

10/03/17

#### A seemingly impossible projectile motion problem

A bomber flies at a speed of 60 m/s, 1100 m above the ground. With its target 900 m away horizontally (on the ground), what is the vertical launch speed needed to drop the bomb to reach its target?

Physics Math Kinematics

09/18/17

#### Kinematics problem involving two objects

Two objects are thrown up. Both are thrown up at 16 m/s, but one of the them is thrown up 2 seconds later after the first object is thrown. When and where do the objects meet?
I'm ending up...
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Physics Math

09/15/17

#### Is there a quicker way to do this kinematics problem?

A tired student jumps onto his bed. If he jumps 1.5 m and lands onto his bed that is 0.7 m, how long is he in the air for?
I combined the times for him going up and then going down. Is there a...
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Physics Math Motion

09/14/17

#### Discrepancies with velocities and displacement

From a 100 m apartment balcony, you throw a tennis ball down at 5 m/s. How long until it hits the ground below?
I'm confused on how to assign their directions

Physics Math

08/28/17

#### Average Speed

Julie drives 160 mi to Grandmother's house. On the way to Grandmother's, Julie drives half the distance at 33 mph and half the distance at 58 mph. On her return trip, she drives half the time at 58...
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Physics Math

08/03/17

#### Two 65 kg astronauts leave earth in a spacecraft, sitting 1.0 m apart.

How far are they from the center of the earth when the gravitational force between them is as strong as the gravitational force of the earth on one of the astronauts?

Physics Math

07/21/17

#### murphy can row at 5kmph in still water. If the velocity of the current is 1kmph and it takes him 1 hour to row to the place and back, how far is the place?

A question from physics homework that is really confusing me

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