How many joules of heat would be required to heat 0.5 kg of aluminum by 2 kelvin

A 50kg car is moving at a velocity of 4 m/s. After a collision, the car is moving at a velocity of 5m/s.

earnstyle [38]

Answer:

Explanation:

The equation for momentum is p = mv; therefore,

p1 = 50(4) so

p1 = 200

p2 = 50(5) so

p2 = 250

The impulse, the change in the momentum, is 50, going in the same direction.

8 0

3 years ago

How does mass effect potential and kinetic energy on a roller coaster?

PilotLPTM [1.2K]

Potential energy is measured by mass * gravity * height. So, the larger the mass on a roller coaster, the more potential energy it has.

Also, the higher it is, the more potential energy it has.

6 0

3 years ago

A ball is hurled straight up at a speed of 15 m/s, leaving the hand of the thrower 2.00 m above the ground. Compute the times an

SVETLANKA909090 [29]

Answer:

5.37 m/s

0.98 seconds

Explanation:

t = Time taken

u = Initial velocity

v = Final velocity

s = Displacement

a = Acceleration due to gravity = 9.81 m/s²

$v^2-u^2=2as\\\Rightarrow v=\sqrt{2as+u^2}\\\Rightarrow v=\sqrt{2\times -9.81\times 10+15^2}\\\Rightarrow v=5.37\ m/s$

Velocity of the ball when it passes an observer sitting at a window is 5.37 m/s

$v=u+at\\\Rightarrow t=\frac{v-u}{a}\\\Rightarrow t=\frac{5.37-15}{-9.81}\\\Rightarrow t=0.98\ s$

Time taken by the ball to pass the observer sitting at a window is 0.98 seconds

3 0

3 years ago

Describe gravitational force in your own words. Which two factors affect the gravitational force between two objects?

MakcuM [25]

Answer:

Gravitational force is the force that attracts objects towards each other. Two factors that affect the gravitational force between objects are the mass of the two objects and the distance between

Explanation:

Gravity is what pulls us towards the Earth if we were to jump into the air, so it is the force that pulls things towards other things. The bigger the objects are the more gravity they have, so a planet has more gravity than say, an apple. Distance between objects also makes their gravity change, so the Earth's pull on the moon is different than the Earth's pull on the sun.

Hopefully this helps- let me know if you have any questions!

5 0

2 years ago

Read 2 more answers

A bird carries a 25 g oyster to a height of 11m what is the gravitational potential energy of the oyster

garik1379 [7]

Given data:

Mass of oyster (m) = 25 g,

= 0.025 kg ( since 1 Kg = 1000 g)

Height of oyster (h) = 11 m,

determine gravitational potential energy (GPE) = ?

Gravitational potential energy is energy of an object possesses because of its position on the earth. The amount of gravitational potential energy of an object on earth depends on its mass and height from the earth.

Mathematically,

GPE = m. g. h Joules

Where,

GPE = gravitational potential energy,

m = mass of object in Kg,

g = gravitational force in m/s², g = 9.8 m/s²

h = height of the object in meters,

Now substituting all the values in the equation GPE

GPE = 0.025 Kg × 9.8 m/s² × 11 m

= 2.695 J

Gravitational potential energy of the oyster is 2.695 J

7 0

3 years ago