How much heat is needed to raise the temperature of 6g of water by 18oC?

russell westbrook has a mass of 84.8kg.When jumps to dunk on z 3.04 meter goal,what will be his G.P.E at the apex of his jump?

horrorfan [7]

The gravitational potential energy is 2526 J

Explanation:

The gravitational potential energy (GPE) of an object is the energy possessed by the object due to its position in the gravitational field. Near the Earth's surface, it can be calculated as

$GPE=mgh$

where

m is the mass of the body

$g=9.8 m/s^2$ is the acceleration of gravity

h is the height of the object

In this problem, we have

m = 84.8 kg

h = 3.04 m

Substituting,

$GPE=(84.8)(9.8)(3.04)=2526 J$

Learn more about potential energy:

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6 0

3 years ago

The Mass of the Sun is 1.989 × 10^30 kg. The speed of light is 3 x 10^8 m/s. Assuming the Sun is 75% hydrogen, how much Energy c

bogdanovich [222]

Answer:

$E = 13.428 \times 10^{46} J$

Explanation:

Mass of the Sun = $1.989 \times 10^{30} Kg$

Amount of Hydrogen = 75% of Mass of Sun,

thus mass of Hydrogen (m) in the Sun is,

$m = 1.989 \times 10^{30} \times \frac{75}{100}$

m = $1.492 \times 10^{30}$

Speed of Light (c) = $3 \times 10^{8} m/s$

Thus, energy(E) produced if whole of hydrogen is converted into energy,

E = mc²

$E = 1.492 \times 10^{30} \times (3 \times 10^{8} )^{2}$

$E = 1.492 \times 9 \times 10^{46}$

$E = 13.428 \times 10^{46} J$

8 0

2 years ago

Where is parallel circuits used?

suter [353]

Answer:

if one bulb burns out, the other bulbs in the fixture continue to operate. Other uses include an electronic OR gate, where two switches are in a parallel circuit: one of the switches must be closed for the circuit to function.

8 0

3 years ago

A constant force of 2.5 N to the right acts on a 4.5 kg mass for 0.90 s.

Alborosie

Answer:

(a) $v_f=0.5\frac{m}{s}$

(b) $v_f=-11\frac{m}{s}$

Explanation:

(a) Since a constant external force is applied to the body, it is under an uniformly accelerated motion. Using the following kinematic equation, we calculate the final velocity of the mass if it is initially at rest( $v_0=0$ ):